US2303726A - Golf green drill - Google Patents

Description

Dec. 1,1942. w. DETTLOFF ETAL 9 2,303,726

' GOLF GREEN DRILL Filed April 10, 194;" ,4 Sheets- Sheetl Inventor M404 7 247-72 an; z rwwlk $01772 an- Attorney Deep. 1, 1942. ETTLQFF Em 2303326 GOLF GREEN DRILL Attorney Dec. 1, 1942. w. DETTLOF'F ETAL ,2303%? GOLF GREEN DRiLL Filed April. 10, 1941 4 Sheets-Sheet 4 Inveritor Attorney Patented Dec. 1, 1942 OFFICE GOLF GREEN DRILL William Dettlofi and Frank J. Dettloff,

Detroit, Mich. 1

Application April 10, 1941, Serial No. 357,982

1 Claim.

Our invention relates to an improved drill for use in reconditioning golf course greens and the like, and the primary object of our invention is to provide a powered drill of the gang type involving a plurality of ground drilling augers, the drill being entirely mechanized and driven by a suitable motor whereby the augers are simultaneously operated, and may be applied to the ground at the will of the operator simply by operating the trundling handle of the device.

Another important object of our invention is to provide a simple and efficient arrangement of the character indicated which removes the earth from the holes drilled so that the holes better accept the water and the like used in the I reconditioning, and wherein the rollers which support the device upon the ground are utilized to redistribute the drilled earth from the holes and roll the same into the surface of the green,

thereby reducing the number of operations which must be otherwise performed in reconditioning the green.

Other important objects and advantages of our invention will be apparent from a reading of the following description taken in connection with the appended drawings, wherein for purposes of illustration we have shown a preferred embodiment of our invention.

In the drawings:

Figure 1 is a general front elevational view of the embodiment.

Figure 2 is a fragmentary right hand side elevational view thereof.

Figure 3 is an enlarged rear elevational view of Figure 1.

Figure 4 is an enlarged transverse vertical sectional view taken through Figure 1 along the line 44 and looking in the direction of the arrows.

Figure 5 is a transverse vertical sectional view taken through Figure 3 along the inner side of one of the end members of the frame.

Figure 6 is an enlarged horizontal sectional view taken through Figure 3 along the line 66 and looking upwardly in the direction of the arrows.

Referring in detail to the drawings, the illustrative green drill comprises the forwardly and rearwardly spaced ground engaging rollers 5 and 6, respectively, which are rotatably mounted between the depressed ends of transverse pairs of legs 1 and 8, respectively, which have their upper ends abutted along the side of the lower part of the corresponding end members 9 and Hi to which the legs are attached by means of bolts II, whereby the end members 9 and Ill are supported at a suitable elevation above the ground I2 or surface of the golf green. The vertical plate-like end members 9 and H] are spaced and connected by a horizontal plate 13 engaged with the lower ends thereof, the central upper portions of the members 9 and I9 being provided with vertically elongated slots l4.

Each of the end members 9 and 19 has a pair of longitudinally spaced vertical guide ribs M and I5 which rise from a horizontal rib It engaged with their-lower ends, the ribs I4, l5 and 16 being removably attached to the inner surface of the end members. The upper ends of the vertical ribs l4 and I5 abut horizontal lugs or abutments I1 and [8 which project inwardly, as illustrated in Figure 5, toward each other and toward opposite sides of the vertical slot M to act as upper limit stops in a manner to be pointed out herein.

A horizontal gear assembly base plate 19 has end portions slidably positioned between the vertical ribs I5 and I5 and sufliciently wide to engage the inwardly projecting portions of the lugs I1 and 18 in the uppermost position of the.

said assembly. This prevents the assembly from moving to such an elevation that the horizontal main shaft 20 can bear against the upper end of the vertical slots I4 in the end members 9 and The opposite ends of the shaft 20 are provided with bronze bushings 21 in which the shaft turns, and which in turn slide in the vertical slots 14; and external collars 22 which bear against the outer sides of the end members 9 and [9 to prevent relative longitudinal movement of the shaft 20. Inwardly of the bushings 2| thereare collars 23 in which the end portions of the shaft 29 turn and which are fastened to the upper sides of the outer end portions of the gear assembly base plate l9, by suitable bolts 24 which traverse the collars and the base plate and whose upper ends are provided with eyes 25 to act as anchors for the lower ends of the vertical contractile springs 26 whose upper ends are connected to U-bolts 21 secured to the laterally inwardly directed upper end portion of standards 29 which are bolted as indicated by numeral 30 to the forward and rearward marginal edge portions of the inner sides of the end members 9 and It, with their cross members 3| extending between and connected to the upper parts of the standards.

Next to the collars 23 there are mounted on the base vertical tray-like elements 32 which constitute ends for the inverted U-shaped cross section housing 33 which encloses and protects the main shaft 20 and its gears and the gears of the individual augers, the dependent edge portions of the housing 33 being removably secured as indicated by the numeral 34 to the front and rear edges of the auger assembly base plate I49.

Longitudinally spaced along the shaft 20 are pairs of oppositely facing beveled gears 35 and 36, respectively, which are locked to the shaft by suitable means indicated by the numeral 31, in positions to mesh with the corresponding pairs of bevel gears 39 on the upper ends of the auger shafts 49 which pass through openings in the base plate l9 and have flexibly connected thereto as indicated by the numeral 4| the augers 42.

Thrust washers 43 separate the beveled gears 38 and 39 from the top of the base plate l9, while bushings 44 locked on the lower part of the auger shafts are separated from the bottom of the base plate l9 by thrust washers 45. By the means described rotation of the shaft 20 by the connection of a-fiexible driving shaft 46 therewith at one end, produces rotation of the augers 42.

The sides of the augers are open so as to elevate the earth as the hole is drilledin the ground and prevent return of the earth into the resultant hole. The flexible driving shaft 46 is connected to suitable motor means, such as a small gasoline engine which may be suitably associated with the present device.

Reclining L-shaped brackets 46 and 41 have the reclining standard portions thereof fastened to the top of the horizontalplate l3 of the frame,

with the foot portions projected forwardly from the front of the frame and bifurcated at their upper endsas indicated by the numerals 48. Pivot pins 49 traversethe bifurcations and pivotally support the depressed forward ends of the arms 50 projecting from andsecured to the lower end of the handle which is generally designated and which may be of the lawn mower type. The upper and rear portions of the legs 50 are arranged to pass into slots 52 in the forward side of the gear assembly housing 33 wherein these elements 50 are pivotally supported on pins 53 traversing bifurcated upper portions of standards 54 fastened to and rising from the gear assembly base plate l9 as shown in Figure 3, whereby the handle 5| is operatively connected to the auger supporting carriage constituted by the base plate l9 and the shaft and associated components, whereby depression of the upper part of the handle 5| will result in depression of the said assembly to bring the augers 42 into operative relation with the ground. The springs 26 resist operative depression of the auger carriage and act to elevate the same after the downward pressure is released on the handle 5|.

Means for restoring the handle 5| to normal inoperative elevated position comprises a radial arm 55 fixed to the horizontal bar whose opposite ends are secured to the braces 3| on the standards 29, and a contractile spring 51 having its upper end connected to the outer end of the arm 55 and its lower end connected to an eye 58 on a lateral projection 59 on the lower end of a bar 60 which projects at right angles from the handle 5| in a downward and rearward direction.

Although we have shown and described herein a preferred embodiment of our invention, it is to be definitely understood that we do not wish to limit the application of our invention thereto, except as may be required by the scope of the subjoined claim.

Having described the claimed as new is:

Agang drillof the character described comprising a frame supported on front and rear groundengaging rollers, said frame comprising a pair of laterally spaced vertical end members formed with vertical slots, an auger carriage supported for vertical movement between said end members and comprising a horizontal base, a horizontal main shaft extending across and rotatably connected to said horizontal base with the endsof said shaft projecting through the vertical slots in the end members, a power connectionto one end of said shaft, a pluralityof bevel drive gears fixed on said shaft, a plurality of vertical rotary auger shafts mounted on said base and having bevel driven gears in mesh with said bevel drive gears, an auger depending from and operatively connected to each auger shaft, spring means connected between said horizontal base and elevated portions of said end members resisting depression of said base from normal elevated position, and vertically swingable handle invention, what is means supported on said frame and operatively connected to said auger carriage for depressing said carriage to engage said augers with the ground, and second spring means operating between a part of said frame and said handle for swinging the handle to its elevated position after auger applying depression of said handle.

WILLIAM DE'I'TLOFF.- FRANK J, DE'I'TLOFF.

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