US2928654A - Stake puller machine - Google Patents

Description

March 15, 1960 N. P. DANN ETAL 2,928,654

STAKE FULLER MACHINE Filed May 31, 1957 4 Sheets-Sheet 1 INVENTORS. NOAMA/V I? D/I/VN W ll 75/? I l/OOO 14 TTO/PA EYS March 15, 1960 N. P. DANN EIAL 2,928,654

STAKE FULLER MACHINE Filed May 31, 1957 4 Sheets-Sheet 2 INVENTORS. NORM M I? DAN/V WAL TEA I H000 ATTORNEYS March 15, 1960 N. P. DANN ETAL 2,923,654

STAKE FULLER momma:

Filed May 31, 1957 4 Sheets-Sheet 3 M www- WALTEAJ. #000 v ldw kz w March 15, 1960 N. P. DANN EIAL STAKE FULLER MACHINE 4 Sheets-Sheet 4 Filed May 31, 1957 INVENTORS NORMA/V I? 04 W41. 75/? I HOOD BY STAKE PULLER MACHINE Norman P. Dann, Cleveland Heights, and Walter'J.

Hood, Shaker'Heights, Ohio, assignors to The Cleveland Formgrader Avon, Ohio Application May 31, 1957, Serial No; 662,651

21 Claims. (Cl. Z'54 -18) This invention relates to a new and improved stake 2,928,654 Patented Mar. 1 5, 196i! "'A'still further object of the invention is to provide a stake or pin puller machine which is completely mechanpuller machine, and, more particularly, to a stake puller machine especially adapted for removing concrete form stakes. I I 1 In the-laying of concrete roads, aircraft runways, and like, constructions, it is common practice to pour the concrete between steel forms which are spaced parallel to each other and accurately laid on a prepared Surface. The steel side forms are usually aboutflten feet in length and are securely held ,in place by means of a plurality of one inch diameter steel stakes which are driven through suitable holes in the forms and into the ground to a ical in construction and operation and which includes a three wheeled truck upon which all of the operative structure of the machine is mounted, and, which truck iscons'tructed and arranged so as to' have two of the wheels ride in contact with the concrete side forms, whereby, the stake removal reactive forces will be transmitted through said two wheels and the concrete side forms to ther'oa'd bed, whereby, the machine may be used soon after the concrete has set without injury to the curing concrete. g

Other objects, featuresand advantages of this invention will be apparent from the following detailed description and appendedlclaims, reference being had to the accompanying drawings forming a part of the specification wherein like reference numerals designate corresponding parts of the several views.

v In the drawings: 7

Fig. 1 is a perspe tive view'of a stake puller machine made in accordance with the principles of the invention and showing the machine in an operative position at work on a roadway; F

Fig.2 is a rearelevational view, slightly enlarged and partly broken away, of the structure illustrated in Fig. l, taken-in the direction of the arrowmarked 2;

Fig. 3 isra partial, enlarged,-horizontal sectional view of the structure illustrated in Fig. 2, taken along the line 3-3 thereof,,and'lookinginlthe direction of the arrows; Fig.4 is a partial, enlarged, horizontal sectional view of theistructure illustrated in' Fig. 2; taken along the line 4-4 thereof, and looking. inthe direction of the arrows;

damage the new concrete. ;The stakes are removed from the forms either manually or by a power'machine. .When

the stakes are removed manually a 'two man team' is usually required and the stakes are loosened byhitting them on the sides thereof Witha sledge hammer so as to loosen them, whereby, they maybe manually removed.-

The manualremoval of these stakes is a time consuming and laborious process, especially when the stakes have set for long periods of time in heavy clay or rockylsoil.v Furthermore, the loosening of the stakes by. hitting them on the side with a'sledge hammer is injurious to the stakes and to the steel forms. Heretofore, it has been proposed to remove concrete form stakes by means of complicated, and expensive hydraulically or pneumatically operated. power machines. Machines of the last mentioned/type have proved to be expensive, slow and cumbersome in operation, and heavy in weight. Accordingly, it is the primary object of this. invention to provide a novel andimproved mechanically operated machine for removing concrete form stakes and the like which will be compact and rugged in construction, lightweight, efiicient in oper ation and, which may be operated by one person, whereby, savings in labor may be achieved. i

It is another-object of'this invention to provide an' improved stake puller machine which will be physically small in construction, economical of manufacture, .and, whichmay be manually pushed from stake to stake and be reliable and serviceable, and capable of withstanding roadconstruction conditions. f

It is a further object of this invention to provide a portable power actuated stakepuller machine which is powered by a small gasoline engine which is adapted to drive a novel inertia wheel means for providing a constant and smooth flow of power to a stake grappling means which in turn is adapted to exert a vertically upwardly directed removal force on a stake engaged": by the stake grappling means.

Fig.5 is a partiahfenlarged, horizontal sectional view of the structure illustrated in Fig. 2, taken along the line 5 5 thereof, and lookingin the direction of the arrows;

)Fig'. dis a top plan view, with parts broken away, of the structure illustrated in Fig; 2, taken in the direction of the arrow marked 6; I 1

Fig. 7 is a fragmentary, enlarged, elevational view, partly-in section, of the structure illustrated in Fig. 6, taken along the line'77 thereof, and looking in the direction ofthearrowsi V 'Fig'.' 8 is a fragmentary, enlarged, horizontal sectional viewfo'f the structure illustrated in Fig. 7, taken along the line" 8-8,thereof, and looking in. the direction of the arrows;

fgFig'. 9 is an elevational sectional view of the structure illustrated in Fig.' 8, taken along the line 99 thereof, and looking in the direction of the arrows;

Fig. 10 is a fragmentary, end elevational .view of a modified truck wheel employed in the invention;

Fig; 'll is an enlarged end elevational view of the .truck wheel illustrated in Fig. '10 and showing the parts thereof disassembled from each other; and,

Fig. 12 is a side elevational view of the truck wheel illustrated in Figs. 10 and 11.

Referring now to the drawings, a stake puller machine made in accordance withthe principles of the invention is illustrated in operative. position on a roadway 10, as shown in Figs. 1, 2 and-6. The numeral 11 designates,'

generally, a concrete road side form which is illustrative.

' portion 13. The forms 11 each further include the outer ity' of stakepock'ets, generally designated by the numeral 16, and these pockets are fixedly secured to the leg por tion 14 and the base portion 15 by any'suit'able means; as by welding. As best seen in Fig. 1, each of the stake pockets 16 comprises the vertical spaced apart plates 17 and 18, the upper ends of which are connected by an integral horizontal plate, as 19. A stake hole 20 is formed through the plate 19 and is, aligned with a similar stake hole 21 in the base portion 15. The forms 11 are securely retained in place by means of the stakes or pins 22 which are adapted to be disposed in the holes Zlland 21- and, driven'therethrough and downwardly into the ground.

As shown in Figs. 1, 2 and 6, the stake puller machine 7 of the present invention comprises a wheel supported truck, generally indicated by the numeral 23, which includes a substantially triangularly shaped frame. The truck frame comprises the horizontal, longitudinally dis posed channel rail 24 and the front and rear transversely i 4 V U-shaped slot 55 which extends inwardly from the forward edge thereof. aFixedly mounted on the, upper end of the vertical plate 53, as by welding, are the spaced apart horizontally disposed sleeves 56 and 57. A cable connector member as 58 is disposed with the lower end thereof between'the horizontal sleeves 56 and 57 and is hingedly connected thereto, as by means of the bolt 59 and nut 60. Fixedly connected by any suitable means to the upper end of the cable connector member 58 is a puller cable 61 which is adapted to be maintained in a vertically disposedposition by means of the cable guide means, generally designated by the numeral 62.

guidance to the cable 61 and comprises the horizontal plate 63 and the vertically disposed spaced apart plates or arms 64 and 65 which are fixedly connected thereto by any suitable means, .as by welding. Fixedly mounted disposed channel rails 25 and 26, respectively, 'the a longitudinally disposed vertical plate 27. F'The various aforementioned frame elements arefixedly. se'euredtogether by any suitable means, as by welding. 7

As best seen in Figs.,1 and 2, the left'side of the truck 23 is supported by a pair of wheel assemblies, generally indicated by the numerals 28 and 29. The wheel assembly 28 comprises the longitudinally disposed wheel 30 which is rotatably mounted on the axle 31 which is carried by the two vertical laterally spaced apart 7 secured to the plate 34 by means, of the bolts- 35 and between the arms 64 and 65, as by welding, isthe block 66 onthe-outer face of which is rotatably mounted the -'two adjacently disposed guide rollers 67 and 68. Each of the guid e rollers 67 and 68 is provided with ,a peripherally disposed cable groove .69. The guide rollers .As shown in Figs. 1, 2 and 6, the cable guide means 62 is mounted onthe outer side of a platform formed on the truck- 23- and which includes the horizontal angle rails 72 and 73. The outer ends of the horizontal rails,

72 and 73 are fixedly supported on the horizontal truck rail 24 by means of the spaced apart vertical angle rails nuts 36. The plate 34 is-fixe'dly secured to the lower side of the forward endrof the angle rail 24 by any. suitable means, as by welding. The wheel assembly 291s consjtructed in the same manner as the wheel assembly andthe corresponding parts are marked with similar reference numerals, followed by the small letter a.

As best seen in Figs. 2 and 6, the right side of the truck 23 is supported by a caster wheel assembly, generally indicated by the numeral 37'. The caster wheel assembly arm 43' is integrally'formed on. the upper end. of the vertical arm 41 and extends inwardlytherefrorn and carries a fixedly mounted upwardly extended vertical shaft 44 which is suitably rotatably journalled in the vertical sleeve 45 which is fixedly secured to the outer face of the frame plate 27 by any suitable means, as by welding; The shaft 44 is suitably retained in the sleeve 45, as by means of the nut 46.

As shown in Figs. 1, 2 and 6, the truck 23 is provided with a pair of vertically disposed guide members, generally indicated by the numerals 47 and 48, whichare adapted to provide tracking of the wheels 30' and.30a on the upper face 13 of the forms 11; The guide members 47 and 48 permit use of'wheels without rim flanges which would undesirably cut into the finishedsurface of the road 10. 'The guide members 47 and 48 each com-' prises a vertical guide sleeve .49 which is welded to the outer side of the longitudinal channel rail 24; A guide pin 50 is freely slidably mounted in each of the guide sleevesl49 with the lower end thereof being adapted to slidably engage the outer face of the sloping leg portion 14 of the forms 11, at a point above the stake pockets 16.

of the' present invention is provided with a stake grap pling member or bracket, generally indicated by the numeral 52, which comprises the vertical plate 53 and the integral downwardly and outwardly slo ing plate 54." The sloping plate 54 is provided with afgrwaifdly'fac iug or legs 74 and to which they arefixedly secured, as

by welding. The inner ends of the horizontal angle rails :72 and 73 are fixedly supported on the truck rails 25 and 26 by means of the angle rails 76. and 77, respectively,

and the aforementioned rails are fixedly connected tothe horizontal sleeve 86 which is fixedly mounted on the t outer end of the shaft '87 by means of the washer 88 and gether as by welding. The outer ends of the platform "rails 72 and) 73 are interconnected by means of the horizontal plate 78 which is fixedly connected thereto,

as by welding, andon which the cable guide means 62 is fixedly mounted, as by welding or suitable bolts and nuts s a in Figs.;l, 2, 4 and 6, the upper end of the is "threadably mounted on the horizontal outwardly extended arm 81. The cable connector member 79 is operatively held on the pin 80 by means of the washers .82 and 83 and the bolt 84. The arm 81 is fixedly mounted, as by welding, on the lower endIof the puller lever 85 and, as best seen in'Figs. 1 and 3, the upper end of the lever 85 is fixedly mounted, asby welding, on

the bolt 89.

, As shown inFigs. 1 and '6, the shaft 87 is rotatably journalle'din the bearing 90 which, is fixedly secured on on the platform on thetruck 23. The aforementioned -=first column comprises the longitudinally spaced apart .vertical angle rails 94 and 95, the upper ends of which slope toward each other. The-plate 93 is fixedly secured I to the rails 94 and 95 by means of the' bolts 96 and the nuts 97. The-plte 93 is further supported on the platform by means of the spaced anglebrackets '98 which are disposed on opposite ends of the cable guide means 62 andwhich are secured to the plate 93 by the, bolts 99. The brackets 98 are, fixedly secured to the plat: form plate'lfl by any suitable means, IasYby welding.

Asshownin Figs. 6arld 8, the shaft .87 is operatively connected, to and driven by a single revolution clutch generally designated, by the numeral 100. The operation oedema-ch 10 wil be tnore fully explained the bolts 103 and nuts 104. As shown in Figs. 1, 2, and 6, the vertical plate 102 is part of a second column fixedly mounted on the platform on the truck 23. The second column is spaced inwardly from the first column and comprises the longitudinally disposed horizontal angle rail 105 which'is fixedly secured between the platform rails 72 and 73 by any suitable means, as by welding. The second column further includes the longitudinally spaced apart vertical angle rails 106 ,and 107, the lower ends of, which are fixedly secured to the platform rails 72 and 73, respectively, as by welding, and, the upper ends of which slope toward each other. The plate 102 is fixedly secured to the vertical rails 106 and 107 by means of the bolts 108 and nuts 109. The first and second columns are interconnected by,means of the horizontal transversely disposed angle'rails 110 and 111 which are fixedly secured to the columns as by welding.

As shown in Figs. 2, 6 and 8, and as more fully explained hereinafter the clutch 100 is driven by the gear 112 which is preferably of a 'size having 42 teeth thereon.

The gear 112 is meshably connected to and driven by the pinion gear 113 which is fixedly mounted on the shaft 114 by means of the usual key 115. The gear 113 ispreferably of a size having 12 teeth thereon. The shaft 114 is rotatably journalled at one end thereof in a bearing member (not shown) similar to bearing member 101 on the inner side of the vertical plate 93, and it-is secured in place by means of the bolts 116 and nuts 117. As shown in Fig. 1, theother end of the shaft 114 extends through the hole 118 in the vertical plate 102 and this end is rotatably journalled in the bearing member 119 which is fixedly secured on the inner side of the vertical plate 120 by means of the bolts 121 and nuts 122.

As shown in Figs. 1, 2 and 6, the plate 120 is part of a third column which is disposed inwardly of the second column or toward the right side of the machine as viewed in Fig. 2. This third column comprises the longitudinally disposed horizontal angle rail 123 which is fixedly secured between the platform rails 72 and 73 'by any suitable means, as by welding. This third column further includes the longitudinally spaced apart vertical angle rails 124 and 125, the lower ends of which are fixedly secured to the platform rails 72 and 73, respectively, as by welding, and, the upper ends of which slope toward each other. The plate 120 is fixedly connected to the vertical rails l24 and 125 by means of the bolts 126 and the nuts'127. v

As viewed in Fig. 2, abull gear 128 is fixedly mounted on the shaft 114 by means of the key 129, between the aforementioned second and third columns The bull gear 128 is preferably of a size having 180 teeth thereon. The hull gear 128 is driven by apinion gear 130 which is fixedly mounted on the horizontal shaft 131 by means of the lock key 132. The pinion gear 130 is preferably of a size having teeth thereon. As viewed in Fig. 2, the left end of the shaft 131 is rotatably journalled in the bearing member 133 which is fixedly mounted on the outer side of the vertical plate 102, as by means of the bolts 134 and nuts 135. The right end of the shaft 131.is rotatably journalled in a bearing member 136 which is fixedly mounted on the inner side of the vertical plate 120, by any suitable means. Fixedly mounted on the-shaft 131 is afiywheel or inertia wheel 137, and this wheel is secured on the shaft 131 by means of the lock key 138. .As shown in Figs. 2 and 6, the shaft 131 extends through the vertical plate 120 and carries on the right end thereof the sprocket wheel 139. The

sprocket wheel 139 is fixedly secured to the shaft 131 byf means of the lock key 140. The sprocket wheel is'ili tiirndriven by-a drive member forming a part of the The inner-end, of the shaft 87"is rotatably- 6 clutch 142 which is manually operable by meansofthe control lever 143. The clutch 142 is a fricti'ontype clutch and is driven by means of the engine 144 to which it is connectedby means of the engine output shaft, 145.

144 is suitably fixedly mounted on the truck 23 by any; suitable means and is provided with the usual gas tank 146. The clutch 142may be supported by any suitable means, as by means of the bracket 147 which is con nected to the engine 144 by means of the bolt 148and,

to the clutch by means of the bolt 149. The engine 144 is preferably a three horsepower, four cycle gasoline engine, and engines of this type are readily available on the market. Any conventional type clutch may be employed to carry out the function of clutch142, and a suitable clutch for this purpose is one available on the market manufactured by the Rockford Clutch Division of Borg- Warner Incorporated, Rockford, Illinois, and known as the Rockford Sprocket Over Center Clutch? r As shown in Figs. 7, 8 and 9, the single action clutch 100 includes a sleeve bearing 150 which is carriedinside of the collar 151 of a driving member on which the gear 112 is fixedly mounted, as by means of the lock key 152 and the lock screws 153. The driving member is con tinued in the form of an enlarged annular casing 154, the inner face of which may be lined with a layer 155 of suitable contact material. The shaft, 87 is adapted to be rotatably mounted relative to the drivingmember, and this shaft extends through the sleeve bearing 150.- Secured against movement with respect to the shaft 87 is a sleeve 156 which is fixed to the shaft 87 by means of the lock screw 157 and the lock key 158. Fixedly mounted on the sleeve 156, by means of the lock key 160, is an annular cam 159. The cam 159 is provided with a plurality of cam faces 161 and, upon alternate cam faces 161, are rollers 162 which are retained against undue displacement by means of a collar or confining ring 163 having openings such that the rollers 162 may be projected to extend beyond the same and into engage: ment with the layer of contact material 155. The collar 163 may be secured in position by means of an annular plate 164 which rotatably encircles the sleeve 15 6 and which may be attached to the collar 163 in anyisuitable' manner, as, for example, by the bolts'165. The collar- 163 has its several sections integral or'otherwise fixed with respect to a plate 166 which rotatably encircles the sleeve 156. Y i

It will be seen that if plate 166 be rotated with re 154 is preferably grooved' 'to' receive a layer of oil retaining material 167, to which oil may be supplied in any desired manner. The outer face of the oil retaining material 167 contacts the inner face of plate 166. If

The plate 166 is shifted relative to the shaft 87 by means of the following described structure. As shown in Fig. 8, the outer face of the plate 166 is provided with a radially extending groove or slot 168 within which is disposed a block 169 which is pivotally supported by the pin 170 which is in turnmounted on a cam'plate. 17-1. The cam plate 171 encircles the sleeve 156 and is supported by means of the pin 172 which is mounted upon a hub plate 175. The hub plate 173 is fixed with respect to the sleeve 156 in any suitable'manner. One

end of a spring 174 issecured to the hub platc",173'

' by being fastened to the pin 175 which extends from is fixed to the pin 176 which is mounted on-the cam plate 171. The cam plate' 171 is formed with an an nular cam surface 177 which terminates in a raised po"r-' with which a trip bar or ,rod'179- tion or shoulder 178 I is adapted to beengaged;

The purpose of the clutch 142 is to disengage the I operating load when starting the engine 144. The engine.

As shown in Fig. 7, a support bracket 180 is fixedly.

mounted -on the angle plate 111, as by welding, and carries on the upper end thereof a fixedly mounted block 181 through which; is formed the hole 182. The trip bar' 179 is slidably mounted through the hole 182 and is provided on the. inner 'end thereof with a fixedly mounted annular flange 183. The trip rod- 179 is normally biased inwardly to an operative engagement with the shoulder 178 on the cam plate 171, by means of the spring 184.

handle portion 189. It will be seen that as long as the trip bar 179-is in the position shown in Fig. 7, the cam plate 171 will remain inoperative and the gear 112 may drive the casing 154 but the shaft 87 will not be driven since the cam rollers 162 are not engaged with the contact material 155. When it is desired to rotate the shaft 87, the operator merely pushes inwardly on the operating lever handle 189, whereby, the trip bar. 179 will be moved outwardly and'the spring 174 will contract and will rotate the cam plate 171 in a counter clockwise direction, as shown by the arrow in Fig. 7. The afore- .leve'r 185 extends downwardly to form an operating revolution clutch operating lever handle 189, whereby, the clutch 100 will operate. The operator immediately releases the lever handle 189 and the clutch 100 will rotate the lever 85 through one revolution from the solid line position shown in Fig. 2 up to the dotted position designated by the numeral 190, and back down-to the solid line. position. Some pins may pullout of the ground with onlyone revolution of the puller lever 85,

as shown by the dotted line stake designated by the numeral 191 in Fig. 2. If a long stake is being pulled from the ground, a number of revolutions maybe required. 'In the latter case, the stake puller bracket 52 which is carried on the lower end of the cable 61, will slide down the stake after each revolution and will remain engaged therewith as the puller lever 85 makes 1 each down stroke. It will be seen thatthe sloping bracket plate 54 frictionally engages thestakes 22 between each t of'the side faces of .the-U-shaped slot 55- and exerts an described action will cause the cam 159 to be correspondstop because the inner end of the trip bar 179 will eventually follow the cam surface 177 down to the shoulder 178, whereby, the clutch will be disengaged and the shaft 87 ,will be stopped. A single revolution clutch of the aforedescribed type is readily available on the market .and the clutch 100 described hereinbefore is a preferable clutch ofthis kind, and is more fully described in detail in the US. patent to Richard G. Dickens, No. 2,140,737.

In the use of a stake puller machine of the present invention, the machine would be positioned on top of.

i the concrete forms 11' with the wheel assemblies 28and 29 riding on the upper face 13 of the forms. The concrete road 10- which has set, will support the castor wheel assembly 37. The clutch-142 is firstdisengaged and the gasoline engine 144 is started after which the clutch 142 may be shifted to the operative position. The drive from the engine 144 is transmitted through the friction clutch 142 and, by means of the chain 141 and sprocket 139, it is transferred to theshaft 131 and the inertia Wheel 137. The inertia wheel 137 furnishes a. constant potential force capable of supplying sufiicient energy to the pin puller system to overcome the load of pulling a stake out of the ground. The driving force is further transferred by means of the pinion 130 to the bull gear 128 and to the intermediate shaft 114 and thence by means of the pinion 113 and gear 112 to the single revolution clutch 100. The aforedescribed gear train is adapted to reduce the revolutions per minute put out by the gasoline engine 144. v v 2 After the engine 144 has been started and the clutch l 42has been shifted to the operative position so as to drive the aforementioned gear train, the machine is manually pushed to a positionbeside a' stake as shown in Figs. 1 and ,2. The puller lever 85 will be in the solid line position shown in Figs. -1 and 2, and the operator may manually position the puller bracket 52 so as to crete form having a vertical outer wall 193 which is integral with an upper horizontal face 194. The numeral upward removal forcelthereon when cable 61 is moved upwardly. The friction grip of the bracket 52 on the stakes 22 is further effected because of the fact that the bracket 52 is hingedly connected to the cable connector 58, whereby, said friction grip is elfected on the upward erated by only one man and that the number of stakes which can be removed per hour is greatly increased by the use of this machine, compared to the removal rate when the stakes are manually removed'. The present stake puller is simple'to operate since the operator, in order to remove a stake, has merely to engage the puller bracket 52 therewith, and to operate the single revolution.

clutch handle 189 either singly or repeatedly, as desired. The operation of the present invention is completely based on'mechanical forces transmitted through gears, shafts and clutches. i

A modified wheel assembly adapted for use with the pin puller of the present invention is shown in Figs. 10, 11 and 12. In Fig. 10, the numeral 10 indicates a concrete roadway which has been constructed between concrete forms having a cross sectional shape as shown. in"

this figure. The numeral 192 generally designates a con- 195 designates a horizontal mounting plate similar to the plates-33 illustrated in Fig. 1. Fixedly mounted on the lower side of the plate 195, toward the innerside thereof, is a depending support arm 196. Fixedly'moiiuted on the inner face of the arm'196, as by welding, is a journal selected adjusted position in the journal member 197 by' means of the lock bolt 201.. The shaft 200 extends through a suitable aperture as 202 in the support arm 196. A rubber'tired wheel 203 is suitably rotatably mounted on the outer endof the shaft 200 and is provided with a removable guide flange 204. The flange 204 is adapted to be mounted'on the hub 205 against engage the stake 22 in the slot 53 in the bracket plate 54. The operator then pushes inwardly on the single" the outer face of the wheel 203. As best seen inFigs.

11 and 12, the flange 204 is removably mounted on'the.

wheel 283 by means of the bolts 206 and the wing nuts 207. The wheel 203 is fixed on the shaft 200 against is preferably adaptedfor use with a concrete1 form, having a] vertical outer legfor wall as 193. As clearly shown in'Figs. 10, 11 and 1,2, the removable 11 86.404 is essence adapted to extend beyond the periphery of the wheel'203 and to abut the outer face of the concrete 'fornr wall- 193, whereby, it serves as a guide means for guiding thepin puller machine as it is pushed along the concrete forms. It will be obvious that flanged guide wheels of the type illustrated in Figs. 10, 11 and 12 may be substituted for the wheel assemblies 28 and 29 illustrated in Fig. 1, when desired. When flanged wheel assemblies as shown in Figs. 10, 11 and 12 are used, the guide members 47 and 48, as shown in Fig. 1, are deleted. It will be seen that the flanged wheel 203 may be adjusted relative to the machine frame by sliding the shaft 200 in the journal member 197. The purpose of this adjustment is to permit positioning of the puller cable for dilferent size road forms.

While it will be apparent that the preferred embodiments of the invention herein disclosed are well calculated to fulfill the objects above stated, it will be'appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope or fair meaning of the subjoined claims.

What we claim is:

1. A stake puller machine comprising: a wheel supported truck; an engine mounted on said truck; a gear train operatively mounted on said truck; an inertia wheel rotatably mounted on said truck and operatively'com nected to said gear train; means interconnecting said gear train and inertia wheel and said enginefor driving said gear train and said inertial wheel; and, a stake'grappling means operatively connected to said gear train.

2. A stake puller machine-comprising: a wheel sup-r ported truck; an engine'mounted on said truck;, a gear" train operatively mounted on said truck; an inertiawheel.

rotatably mounted on said truck and operatively connected to said gear train; means interconnecting said gear train and inertia wheel and said engine for driving said gear train and inertia wheel; a single revolution clutch operatively connected to said gear train; and, a' stake-- grappling means operatively connected to said clutch; 3. A stake puller machine comprising: a wheel .supported truck; an engine mounted on said truck; a gear train operatively mounted on said truck; an inertia .wheel rotatably mounted on said truck and operatively connected to said gear train; means interconnecting said gear train and inertia wheel and said engine, including a clutch,

for driving said gear train and inertia wheel; a single revolution clutch operatively connected to said gear train;-.

- eratively mounted on said truck; adrive means interconnecting said first clutch and said gear train and inertia wheel, whereby, said engine may drive said inertia'wheel and gear train; a second clutch. operatively connected to said gear train; and, a stake grappling means mounted on said truck and connected to and operable by said second clutch. i

5. A stake puller machine comprising: a wheel supported truck; an engine mounted on said truck; a first clutch operatively connected to said engine; an inertia wheel rotatably mounted on said truck; a gear train operatively mounted on said truck; a sprocket and chain drive means interconnecting said first clutch and said gear train and inertia wheel, whereby, said engine may drive said inertia wheel and gear train; a single revolution clutch operatively connected to said gear train; and, g

a stake grappling means mounted on said truck and connected to and operable by said single revolution clutch.

6. A stake puller machine comprising: a wheel supported truck; an engine mounted on said truck; a gear train operatively mounted on said truck; an inertia wheel nected "to said ear" train; means interconneeting saitigeartrain and-inertia wheel and said engine for driving said gear train and inertia wheel; a single revolution clutch operatively connected to said gear train; a stake grappling bracket; a rotatable member mounted on said truck and operatively connected to said single revolution clutch for. selective rotation of said member; and, means interconnectingsaid grappling bracket and said member, whereby, when said member isrotated said grappling bracket will be actuated upwardly and downwardly.

7. A stake puller machine comprising: a Wheel sup ported truck; an engine mounted on said truck'; a geartrain operatively mounted on said truck; an inertia'wheel' rotatably mounted :on said truck; a first clutch operativ'e- 1y connected to said engine; a sprocket and chain drive:

means interconnecting said first clutch and said gear train and inertia wheel, whereby,said engine may drive said inertia wheeland gear train; a single revolution clutch operatively connected to said gear train; a stake grappling bracket; a rotatable member mounted on said truck and operatively connected to said single revolution clutch for,

selective rotation of said member; and, means interconnecting saidgrappling bracket and said member, where-: by, when said member is rotated said grappling bracketr will be actuated upwardly and downwardly.

8. A stake puller machine comprising: a wheel sup-.'

ported truck; an engine mounted on said truck; a first clutch operatively connected to said engine; a first shaft rotatably mounted on said truck; an inertia wheel fixedly tion clutch for selective rotation of said member; a stake grapplingbracket; and, means interconnecting said grap- V pling bracket and said member, whereby, when said member is rotated said grappling bracket will be actu-- ated upwardly and downwardly. g t

9. A stake puller machine comprising: a wheel supported truck; an engine mounted on said truck; a first.

clutch'operatively connected to said engine; a first shaft rotatably mounted on said truck; an inertia wheel fixedly; mounted on said first shaft; a drive means interconnecting said first clutch and said first shaft; a second shaft rotatably mounted on said truck; a first driven gear on said second shaft; a first drive pinion on said first shaftmeshably' engaged with said first driven gear; a singlerevolution clutch operatively mounted on said truck; a second driven gear operatively connected to said last named clutch; a second drive pinion on said second shaft;

meshably engaged with said second driven gear; a rotat able member mounted on said truck and operatively connected to said single revolution clutch for selective rotation ofsaidlmember; a stake grappling bracket; and, means interconnecting said grappling bracket and said memben'whereby, when said member isv rotated said; grappling bracket will be actuated upwardly and downi wardly.

10. The invention as defined in claim 9, wherein: said means interconnecting said grappling bracket and said rotatable member includes a cable connected at one end thereof to said rotatable member and at the other end thereof to said grapping bracket; and, a cable guide means mounted on said truck adapted to guide said cable whereby the grappling bracket will be actuated vertically.

11. A stake puller machine comprising: a wheel supported truck; an engine mounted on said truck; a first clutch operatively connected to said engine; a first shaft rotatably mounted on said truck; an inertia wheel fixedly mounted on said first shaft; a drive means interconnecting said first clutch and said first shaft; a second shaft rotatably mounted on said truck; a first driven gear 11 a Y a on said second shaft; afirst drivepinion on said first shaft meshably engaged with said first driven gear; a single revolution clutch operatively mounted on said truck; a second driven gear operatively connected to said last named clutch; a second drive pinion on said chaise-r- 12 17. Ian stake puller machine provided with a selfcontained power drive means: a single revolution clutch 1 operatively connected to said power drive means; a hori second shaft meshably engaged with said second driven 7 .cal direction when said lever is rotated by said third and outwardly sloping portion-connected to said vertically disposed portion, and, said sloping portion being provided with a stake receiving slot.

13. The invention as defined in claim 12, wherein: the

upper end of said cable is pivotally connected'to said lever. A

14. In a stake puller machine provided with a 'selfcontained power drive means; a single revolution clutch operatively connected. to said power drive means; a horizontal shaft rotatably mounted onsaid machine and being connected to said clutch for selective rotation of said shaft; a laterally extended lever fixedly mounted on said shaft for rotation therewith; a stake grappling bracket; and, means interconnecting said grappling bracket and said lever, whereby, when said lever is rotated said grappling bracket will be actuated upwardly and down wardly. V

zontal shaft rotatably mounted on said machine and being connected to 'said clutch-for selective rotation of said shaft; a laterally extended :lever fixedly mounted on said shaft for rotation therewith; a cable connector rotatably mounted on said lever; a cable having one end thereof fixedly connected to said cable connector; a grappling bracket hingedly connected to the other end of said cable; said grappling'bracket including a vertically disposed portion and a downwardly and outwardly sloping portion connected to said vertically disposed portion;

said slopingbracket portion being provided with a stake.

receiving slot; and, a cable-guide means for guiding said cable so that the grappling bracket will be moved vertically when said lever is rotated to move the cable upwardly and downwardly.

18. In a machine for pulling stakes from road forms, a support truck provided with a pair of wheels on one side thereof adapted to roll 'on the road forms; a first column mounted on said truck along said one side there of; a horizontal shaft rotatably mounted on said first column; a laterally extended lever fixedly mounted on said shaft; a pin .fixed on the outer end of i said lever and extended outwardly of said one side of said truck;

a cable connector rotatably mounted on said pin; a cable fixedly connected to said cable connector; a stake grap- :15. In a stake puller machine provided with a-self-L contained power drive means: a single revolution clutch operativ'ely connected to said power drive means; a horizontal shaft rotatably mounted on said machine and being connected to said clutch for selective rotation of" said shaft; a laterally'extended lever fixedly mounted on said shaft for rotation therewith; a cable-connector thereof fixedly connected to said cable connector; a stake grappling bracket; and, means for hingedlyjcounecting s'aid cable to said grappling bracket.

. 16. In a stake puller machine provided with a self-- contained power drive means: a single revolution clutch operatively connected to said power drive means; a horizontal shaft rotatably mounted on said machine and being connected to said clutch for selective I rotation of pling bracket hingedlyconnectedto said cable; a cable guide means on said truck for guiding said cable so that the grappling bracket will be moved vertically when said lever is rotated to move the cable; and, a power drive means onsaid truck operatively connected to. said shaft for, selective rotation thereof.

19. The invention as set forth in claim l8,wherein:' said power drive means includes, a single revolution f clutchoperatively connected to said shaft, a gear train 7 operatively connected to said clutch, and, anengine op-.

eratively connected to said gear train. 7

20. The invention as set forth in claim 19, wherein:

c said machine includes, a guide means mounted on said rotatably mounted on said lever; a cable having one end truck and adapted to'slidably engage the roadforrn's.

21. The invention as set forth in claim 19, wherein: said machine includes, a guide means mounted on each of said pairof wheelsadapted to roll on the road forms with said guide means being adapted to engagethe outer side of theroad forms.

References Cited in the file of this patent- UNITED STATES PATENTS

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