Cushioned pusher cup attachment for bulldozer mold boards

Sept. 12, 1961

W. A. WINGET

2,999,697

CUSHIONED PUSHER CUP ATTACHMENT FOR BULLDOZER MOLD BOARDS

Filed June 10, 1957

Sheets-Sheet 1

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ATTORNEY

Sept. 12, 1961

CUSHIONED PUSHER CUP

Filed June 10. 1957

w. a. winget 2,999,697

ATTACHMENT FOR BULLDOZER MOLD BOARDS

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Sept. 12, 1961

CUSHIONED PUSHER CUP

Filed June 10. 1957

W. A. WINGET

2,999,697

ATTACHMENT FOR BULLDOZER MOLD BOARDS

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INVENTOR.

WILLIAM A. WINGET

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ATTORNEY

United States Patent Office

2,999,697

Patented Sept. 12, 19S1 plurality of heavy metal plates welded together to afford the desired strength and ruggedness. The member 17 has a longitudinally elongate flat front face 18 provided with forwardly inclined upper and lower edge portions 19. The rear vertical face 17' of the pusher cup member 17 is substantially parallel with the front vertical face 10' of the backing member 10. At the upper end of the member 18 and at opposite ends are furcated upwardly and rearwardly extending supporting arms 20. The arms 20 are pivotally connected by pivots 22 to forwardly and upwardly extending bracket arms 21 on the backing member 10. Manifestly the height of the pusher cup member 18 is considerably less than that of the backing member 10 so that in effect the pusher cup member is suspended from the backing member 10 by the arms 20.

Interposed between the rear face of the pusher cup member 18 and the front face of the backing member 10 is a horizontal row of helical coil springs or cushioning means 24, the front ends of which are disposed in cups 23 rigid with the rear face of the pusher cup member and the rear ends of the springs being disposed within cups 25 rigid with the front face of the backing member 10. Thus it will be observed that when the pusher cup member 17 is brought into engagement with a vehicle such as a scraper-loader, the springs 24 can yield allowing the pusher cup member 17 to be resiliently restrained in its rearward movement toward the backing member, the springs taking up the shock so that damage to the pusher cup as well as the bulldozer parts is obviated.

In order to limit the movement of the pusher cup member. 17-away from the backing member 10, pairs of stop hooks 26 and 27 are disposed at opposite ends of the parts, the hooks 27 being carried by the pusher cup 17 and secured by screws 28 and the hooks 26 being carried by the backing member 10 and secured by screws 29. If desired, the hooks 26 and 27 may be adjusted in and out by disposing the mounting screws in elongate slots.

In order to accommodate different types of mold boards M the backing member 10 may be replaced by other forms of backing members which are contoured to fit the particular mold board.

It will be manifest from the above description that the attachment can be readily mounted or removed from the mold board, it being necessary only to hook the depending arms 15 over the rear of the mold board and tightening up on the screws 16 to position the attachment for use. Of course by merely loosening the screws 16, the attachment can be lifted from the mold board in a relatively simple manner.

The form of the invention shown in FIGURE 5 is similar to that above described and similar parts are identified by the same reference numerals plus the subscript a. The pusher cup member 17α and backing member 10α are substantially in accordance with the previous form. Coil springs 24α are suitably mounted and arranged. However, in this form, the pusher cup assembly, instead of being hooked over the mold board, is secured directly to the frame of the crawler-driven tractor Τ'. For that purpose, at each end of the backing member 10α is bolted a bracket 30 by bolts 30α (only one of which is illustrated) and rigid with each bracket is a rearwardly extending arm 31 which is secured by bolts 32 to the forward side portion of the tractor frame. Thus, under certain conditions the mold board and pivoted U-frame may be removed and the pusher cup assembly mounted directly on the frame of the tractor.

As shown in FIGURE 5 one or more hydraulic shock absorbers 33 of any well known or suitable construction are interposed between and pivoted to the back2,999,697

CUSHIONED PUSHER CUP ATTACHMENT FOR BULLDOZER MOLD BOARDS

William A. Winget, Perry Chapel Road, _

Rte. 2, Lima, Ohio ⁸

Filed June 10,1957, Ser. No. 664,732 3 Claims. (CI. 280—481)

This invention relates to pusher cup attachments for tractors and an object is to produce a rugged and depend- 10 able pusher cup attachment which is yieldable for preventing expensive damage not infrequently occasioned in the use of such attachments, in this case the pusher cup resilient yielding upon engagement with a scraper-loader vehicle or the like. 15

Another object is to produce a pusher cup attachment which can be mounted in an extremely simple manner upon a bulldozer mold board.

A further object is to produce a pusher cup attachment having the new and improved features of construction, 20 arrangement and mounting hereinafter described and for purposes of illustration but not of limitation, embodiments of the invention are shown on the accompanying drawings in which:

FIGURE 1 is a front perspective view of the pusher ²⁵cup attachment, showing the same mounted upon a bulldozer mold board, the latter being shown in fragment and by broken lines;

FIGURE 2 is an end elevation of the pusher cup attachment showing by broken lines a mold board; 30

FIGURE 3 is a rear end elevation of the pusher cup member taken on the line 3—3 of FIGURE 2 and showing in section a fragment of the backing member to which the pusher cup member is pivoted;

FIGURE 4 is a rear end elevation of the pusher cup ³⁵attachment taken on the line 4—4 of FIGURE 2 showing it mounted upon a bulldozer mold board, the. latter being shown fragmentarily; and

FIGURE 5 is a side elevation of an alternate form of mounting for the pusher cup directly on the tractor frame. ⁴⁰

The illustrated embodiment of the invention comprises a crawler mounted tractor T having at the front end the usual mold board M which is suitably connected to the tractor by the usual U-frame F for up and down rocking and adusting movements, a hoist device H being 45 indicated for such purpose.

In accordance with this invention a pusher cup attachment is hooked over the top of the mold board M, and as shown it comprises a backing member 10 constituting a fabricated structure made up of a plurality of heavy 50 metal plates suitably welded together. It will be observed that the attachment is mounted centrally of the mold board and occupies a relatively small area intermediate the ends thereof, the bottom of the attachment being spaced upwardly from the lower edge of the mold board, par- 55 ticularly as indicated on FIGURE 2. The rear face 11 of the backing member intimately engages the front face of the mold board and conforms to the curvature thereof.

On the rear of the backing member disposed near the top thereof and one arranged at each end is a bracket 60 plate 12 which is secured in place by a plurality of bolts 13. Integral with the plate 12 and disposed vertically is a rearward extension plate 14 which terminates in a vertically disposed depending arm 15 which provides a hook to hook over the upper end of the mold board. Thus 65 there are two hooks which hook over the mold board, and to secure the attachment in position each of the arms 15 is provided with a set screw 16 which can be tightened against the rear face of the mold board M. In front of the backing member 10 is a pusher cup member 17 which is similarly of a fabricated structure produced from a

2,9ί ing member and the pusher cup member by bolts 33α and 33b respectively for retarding or cushioning the action of the coil springs or cushioning means 24α in moving the pusher cup member when the force or pressure against same is removed. The shock absorbers may also be used to advantage in the form shown on FIGURES 1 to 4.

Numerous changes in details of construction, arrangement and choice of materials may be effected without departing from the spirit of the invention, especially as defined in the appended claims.