US2781036A - Brick and stone cutting machine - Google Patents

Description

Feb 12, 1957 H. J. MOERBE BRICK AND STONE CUTTING MACHINE 2 Sheets-Sheet l Filed Aug. 1, 1955 Feb.l 12, 1957 H. J. MOERBE 2,781,036

BRICK AND STONE: CUTTING MACHINE Filed Aug. 1, 1955 2 Sheets-Sheet 2 63 7?- 57 5'. ,f 1. A62 A -`62 76 79 72 NVENTOR ATTORNEY IIL t. IL

United States Patent C) BRICK AND STNE CUTTING MACHINE Herbert I. Moer-be, Giddings, Terr.

Application August 1, 1955, Serial No. 525,573

3 Claims. (Cl. 12S-23) This invention relates Ato a novel machine of relativ-ty simple construction for use in cutting stone and brick and which may be expeditiously employed for accurately cutting stone and brick to desired sizes.

More particularly, it is an aim of the present invention to provide a machine capable of being operated by a leg of the operator leaving both hands free for holding a piece of stone or brick to accomplish the cutting operation to extreme accuracy.

A further object of the invention is to provide a cutting machine which will face Vthe cut edge of the brick or stone simultaneously with the cutting operation.

Various other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings, illustrating a presently preferred embodiment thereof, and wherein:

Figure l is a front elevational view of the machine;

Figure 2 is a transverse sectional view thereof, partly broken away, taken substantially along a plane as indi cated by the line 2 2 of Figure l;

Figure 3 is an enlarged fragmentary vertical sectional view, taken substantially along a plane as indicated by the line 3 3 of Figure 2;

Figure 4 is an enlarged fragmentary horizontal sectional View, taken substantially along a plane as indicated by the line 4 4 of Figure 2;

Figure 5 is an enlarged vertical sectional view, taken substantially along a plane as indicated by the line 5 5 of Figure 2;

Figure 6 is an enlarged fragmentary vertical sectional view, taken substantially along a plane as indicated by the line 6 5 of Figure 3;

Figure 7 is an enlarged detail horizontal sectional View, taken substantially along a plane as indicated by the line 7 7 of Figure 3;

Figure 8 is an enlarged fragmentary horizontal sectional view taken substantially along a plane as indicated by the line 8 8 of Figure l;

Figure 9 is a fragmentary side elevational View, partly in section, illustrating certain of the parts of the machine detached therefrom, and

Figure l0 is a fragmentary vertical sectional View, taken substantially along a plane as indicated by the line iB-li) of Figure 7.

Referring more specifically to the drawings, the stone and brick cutting machine in its entirety and comprising the invention is designated generally i2 and includes a table-like supporting structure, designated generally 13, inclu-ding a table-top i4, supporting legs which are secured to and extend downwardly from adjacent the corners of the table-top 14, and a shelf 16 which is supported by the legs 15, adjacent Itheir lower ends and substantially below the level of the top 14. The supporting structure or table 13 is adapted to be mounted on any suitable supporting surface such as the ground or a oor.

The table or support 13 is preferably of rectangular shape and one longitudinal side 17 thereof, as indicated in Figure 2, constitutes the front of the table. The top icc 14 is provided with an elongated opening, 18 disposed transversely thereof, near one end of the `table and which extends to adjacent Athe front side thereof, as seen in Figure 2. A pair of corresponding elongated angle members 19 are disposedl on the shelf 16 crosswise thereof and beneath the opening 13 and are secured thereto by suitable fastenings 20 and have abutting upstanding flanges 2i. v

A blade support and guide 22 includes a pair of corresponding uprights, each designated generally 23, each including a pair of'spaced substantially parallel bars 24 which are connected by a relatively wide brace 2S. Said bars 24 and the brace 25 of each upright 23 are disposed coplanar. The lower ends of the complementary bars 24 of the two uprights 23 straddle the flanges 21 and are secured thereto by fastenings 26. The blade support and guide 22 extends upwardly from the angle members 1 9 through the opening 18 and the upper portions of the bars 24 thereof are provided with corresponding longitudinally spaced openings 27 for selectively receiving fastenings 27a which extend through end portions of an upper stationary cutting blade 28 which is thus adjustably mounted stationary in the upper part of the support 22, and the end portions of which provide a spacer for the upper portions of the two uprights 23. The bottom edge of the blade 28 is provided with a depending sharpened portion forming the cutting edge 29 of said blade and which extends between 4the complementary adjacently dis posed bars 24 of the two uprights. As seen in Figure 2, the braces are disposed below the level of the tabletop 14.

An elongated channel shape guide member 30 straddles the outer edge portions of the two front `bars 24 of the uprights 23, which are located adjacent the front 17 of the machine 12, as best seen in Figures 2 and 4, and said guide member 3i? is secured to said bars 24 by suitable fastenings 31 and has its upper er1-d disposed at approximately the level of the table-top 14. The intermediate or bight portion 32 of the guide member 30 is spaced from the forward edges of the front bars 24, as best seen in Figure 4. An elongated rigid strip 33 forming a blade stabilizing slide is reciprocably mounted in the guide 30 between its bight portion 32 and the forward edges of the front bars 24 and extends from the uppen end of said guide 39. The upper end of the stabilizing slide 33 abuts against one end of an elongated lower cutting blade 34 and is detachably secured thereto by fastenings 35, as best seen in Figure 9, The blade 34 is slidably mounted between the uprights 23 below the blade 28 for vertical sliding movement toward and away from said blade 28. The upper edge of the blade 34 is provided with an opstanding sharpened portion forming a cutting edge 36 of said blade and which is disposed directly beneath the cutting edge 29. The bottom edge of the blade 34, intermediate of the ends thereof, is provided with a depending rounded projection 37.

A base or closed end 3-3 of a hydraulic cylinder 39 is provided with a bifurcated extension 40 which straddles the franges 21, to `the rear of the support 22, and is pivotally connected thereto by a fastening 41. A piston d2 is slidably disposed in the cylinder 39 and has a piston rod 43 extending upwardly therefrom slidably through the upper free end of the cylinder 39 and which terminates in a yoke 44 which is pivotally connected by a fastening 45 to one end of a blade actuatinglever 46. The lever 46 extends forwardly from the yoke 44 between the uprights 23 and is pivotally connected by `a fastening 47 at its opposite end to the braces 25, adjacent the front bars 24, for kvertical swinging movement of 4Silid lever 4,6,in the support 22. The lever 46 is Provided withanarcuate notch 48 in its upper edge, located between its pivot 47 yand to the lever 46.

and the yoke 44 which provides a pivot seat for theA rounded lower end of a connecting bar 49. The upper end of the bar 49 is provided with a socket 50 in which the projection 37 is loosely received, for a limited rocking movement of said bar 49 relative to the projection `37 A storage tank 51 which is adapted to contain a hydraulic medium 98 is supported on the shelf 16 to one side of ythe blade support 22 and is secured to said shelf by fastenings 52. A bracket 53 is supported by the tank 51 and preferably extends therefrom in a direction from the blade support 22. A pump 54 is mounted on and secured to the bracket 53. A motor 55 is mounted on and secured to the shelf 16, adjacent to but spaced from the pump 54. The motor 55 is preferably an electric motorand may be controlled by an electric switch, geen at 56 in Figure l, which is mounted adjacent a front corner of the table 13. Any conventional electric circuit, not shown, maybe utilized for themotor 55. The motor 55 is connected to the pump 54 by a belt and pulley drive 57. A conduit 58 which opens into the bottom portion of the ltank 51 connects with the inlet of the pump 54. A conduit 59 leads upwardly from the outlet of the pump 54 and is turned back upon itself and extends downwardly l through the removable cover 66 of the tank 51.

As best seen in Figure 3, the cover 69 is provided with a central opening 61 surrounded by an opstanding hollow column 62 which opens downwardly into the tank 51 and which has an upper end closed by a removable cap 63.

A barrel 611 extends downwardly from the underside of the cover and has an open lower end disposed adjacent the bottom of the tank 51. The barrel 64 has an external ange 65 at its upper end to receive fastenings 66 by which the flange is secured to the underside of the cover 69 to position the barrel in alignment with the interior of the hollow column 62. The barrel 64, at a point spaced from its ends, is provided with aligned outwardly projecting nipples 67 and 68 which communicate with the bore 69 of said barrel and with a substantially semicircular bypass 70 which extends around one half of the barrel 64 and Ywhich constitutes an integral part thereof, as best seen in Figures Y7 and l0.

An elongated plunger 71 has a relatively close titting sliding engagement in the bore 69 Vand extends upwardly therefrom into the column 62 .and terminates in aV re- L stricted extension or stem 72. A washer 73, as best seen in Figure 6, is mounted on the lower part of the stem 72 and is held against upward displacement by a pin 74 which extends through the stem 72 above the washer 73. A

spiral spring 75 is mounted around the upper portion of the plunger 71, within the column 62, and has a lower end seating on the ange 65 and an upper end bearing against the washer 73 for normally maintaining the plunger 71 in -a raised position with the lower end disposed above the level of the nipples 67 and 63 and the .inwardly through the opening 76 and bears on the upper end of the stem 72. Y

A shaft S0 has one end journalled in a bearing 81 which Y is iixed to and Yrises from the shelf 16 and has its opposite end journalled in one of the front bars 24. The shaft 30 is held against sliding movement by collars 82 which are fixed thereto and straddle the bearing 81. A sleeve 83 is 1 adjustably lixed to the shaft 8) and is secured to the lower end of .a lever 84 which extends upwardly and. outwardly from the shaft 80, and outwardly with respect to the front 17 :oi the machine 12, as seen in Figure 2. Thelever 84 has a crossbar 85 at its upper end. One end of a'rigid connecting rod or link 86 is pivotally connected to the l lever 84, intermediate of the ends of said lever, and is pivotally connected at its opposite end to an end of a link S7. The other end of the link 87 is tixed to an end of the shaft 78. The link 87 is disposed at an angle of less than 180 relative to the link 86 and extends inwardly with respect to the link' 86 and relative to the machine 12, so that when the lever 84 is swung clockwise, as seen in Figure 2, the link 86 will be displaced upwardly and rearwardly relative to the machine 12 for turning the link S7 and shaft 78 clockwise, to cause the rocker arm 79 to be swung clockwise, as seen in Figure 6, for exerting a downward thrust `on the plunger 71.

An arm 8S is xed at one end thereof to the shaft 80 and extends transversely therefrom rearwardly with respect to the machine 12. One end of a rod 89 is pivotally connected at 99 to the arm 88. The rod 89 extends upwardly from the arm 88 slidably through an eye 91 which is xed to and extends laterally from one side of the lever d6, adjacent the free end of said lever. A stop 92 is adjustably mounted on the rod 89 above the eye 91 and is adapted to be engaged by said eye to limit upward swinging movement of the lever 46.

As best illustrated in Figure 3, the other discharge end of the conduit 59 is connected to the nipple 67 of the barrel 64. Said conduit 59 extends through one of a pair of flanged openings 93 in the tank cover 60. A conduit 94 extends through the other anged opening 93 and has one end connected to the nipple68. The opposite end of the conduit 94, which is disposed externally of the tank 5l, is connected to the bottom closure cap 3S and communicates with the bottom of the cylinder 39 below the Y inner or lowermost position of the piston 42. Said last mentioned portion of the conduit 94 is sufficiently flexible to accommodate a limited rocking movement of the cyl-V inder 39.

An elongated rule 95 which has a linear scale on at least the forwardly facing side thereof, as seen in Figure l, is secured intermediate of its ends by a fastening 96 to the inner or forward edges of the rear bars 24, between the blades 28 and 34, and so as to extend crosswise of the blade support 22.

A contractile spring 97 has a lower end anchored to the ilanges 21 and an upper end secured to the leveri46, intermediate of the ends of said lever, for urging the lever 46 downwardly for displacing the piston 42 toward the lower end of the cylinder 39 and to permit the thrust bar 49, blade 34 and the stabilizing strip 33 to move down wardly by gravity to their lowermost retracted positions of Figure 2.V

Assuming that the parts of the machine 12 are disposed as illustrated in Figures l zand 2 and that the motor 55 is operating for driving the pump 54, the hydraulic medium 98 which is contained in the tank 51 to substantially the The crossbar 85 of the lever 84 is disposed at a con- Y venient level to be engaged by the knee of theoperator standing in front of the machine 12. With the parts disposed as seen in Figures l and 2, the operator may utilize both hands in positioning a piece of stone or brick to be out with a part thereof extending'through the upper part of the support 22 between the blades 28 and 34. VThe linear measure 95 can be utilized for properly positioning the stone or vbrick so that it may be cut off to a desired length. While thus holding the stone or brick in a desired position between the cutting edges 29 and 36, with both hands, the operator exerts pressure with either knee against the crossbar 85 for swinging the level 84 clockwise as seen in Figure 2, and as previously described. Clockwise swinging movement of the lever 84 causes the link 86 to be displaced upwardly and toward the rear of the machine 12 for rocking the link 87, shaft 78 and rocker arm 79 clockwise as seen in Figures 2 and 6, so that the rocker arm will exert a downward thrust en the plunger valve 71 for moving said plunger valve from its raised position of Figure 3 to its lower, closed position of Figure l0. The plunger 71 in its lower position of Figure l0 closes the bore 69 so that said bore is not in communication with the nipples 67 and 68 to thus prevent the uid 98 being pumped through the conduit S9 returning to the tank 51. However, the nipples 67 and 63 are in communication with one another by the bypass 70, around the plunger 71 when said plunger is in a closed position, as illustrated in Figures 7 and 10. Thus, the fluid is pumped under pressure from the pump 54 through the conduit 59, nipple 67, bypass 79, nipple 68 and conduit 94 into the lower end of the cylinder 39 for forcing the piston 42 and piston rod 43 upwardly. Upward movement of the piston rod 43 causes the lever 46 to be rocked counterclockwise about its pivot 47 for exerting an upward thrust on the bar 49 and the movable blade 34. As the blade 34 is thus displaced upwardly the stone or brick will be cut ot between and by the cutting edges 36 and 29. The stabilizing element 33 will maintain the cutting edge 36 parallel to the cutting edge 29 during upward movement of the blade 34.

After the cutting operation has thus been completed, the pressure of the knee exerted against the crossarm 85 is released so that the spring 75 can force the plunger 71 upwardly to its open position of Figure 3. The plunger 71 moving upwardly will rock the arm 79 counterclockwise as seen in Figure 6 to rock the shaft 78 and link 87 in the same direction to return the lever 84 to its position of Figure 2. As soon as the plunger 71 clears the lower part of the bores of the nipples 67 and 68, the uid being pumped through the conduit S9 will be returned to the bottom of the tank 51 and the spring 97 will react to swing the lever 46 downwardly. This will cause the piston 42 to be displaced downwardly in the cylinder 39 for forcing the liquid from the lower part of said cylinder back through the conduit 94 and into the barrel 54 from which said liquid will also be discharged into the bottom of the tank 51.

It will be noted that the arm 88 and rod 89 will move downwardly as the lever 84 is swung rearwardly and as the lever 46 swings upwardly, so that the stop 92 and eye 91 will move toward one another to cause the stop 92 to engage the eye 91 to prevent further upward movement of the lever 46 before the cutting edge 36 can contact the cutting edge 29.

Various modiications and changes are contemplated and may obviously be resorted to, without departing from the spirit or scope of the invention as hereinafter defined by the appended claims.

I claim as my invention:

l. A stone and brick cutting machine comprising a substantially upright blade support, an upper stationary blade mounted in an upper part of the blade support and having a downwardly facing cutting edge, a lower blade slidably disposed in said blade support beneath the upper blade for movement toward and'away from said upper blade, said lower blade having an upper cutting edge disposed in opposed relation to the cutting edge of the upper blade, thrust imparting means connected to and supported by the blade support and engaging under said lower blade and including a hydraulic ram, a storage tank containing a hydraulic medium, a conduit leading from the lower portion of said storage tank to said ram, a constantly operating pump interposed in said conduit between the tank and ram for supplying the hydraulic medium under pressure to the ram from said tank, a valve casing interposed in said conduit between the pump and ram and having an opening discharging into the tank, a valve body contained in said valve casing, spring means normally holding said valve body in an opened position wherein said casing opening is exposed to permit the hydraulic medium to return from the pump by way of a portion of the conduit to the tank and to permit the hydraulic medium to ow back to the tank from the ram, control means adapted to be actuated by the knee for moving said valve body against said spring means to a position for closing the casing opening, and said casing having a bypass communicating with said conduit through which the medium under pressure passes around the valve body from the pump to the ram, when the valve body is in a closed position, for extending the ram to forcibly displace the lower blade toward the stationary olade for severing a brick or stone disposed between the cutting edges of the blades.

2. A machine as in claim l, said thrust imparting means including a lever having one end pivotally connected to the blade support beneath the lower blade and an opposite end pivotally connected to an extensible end of said ram, and a rigid connecting element disposed between the lever and lower blade having one end engaging the lever adjacent to but spaced from the lever pivot and an opposite end engaging the intermediate portion of the bottom edge of the movable blade.

3. A machine as in claim 2, and spring means connected to the lever and blade support for urging the lever to swing downwardly for retracting the ram when said valve body is returned to an open position for causing the fluid medium under pressure to be forced back from the ram into the tank through said casing opening.

References Cited in the le of this patent UNITED STATES PATENTS 2,368,138 Hayden Ian. 30, 1945 2,613,661 Huber Oct. 14, 1952 2,641,845 Gundlach June 16, 1953 2,657,681 Gatzke Nov. 3, 1953

Images