US2753059A

US2753059A - Loader

Info

Publication number: US2753059A
Application number: US330714A
Authority: US
Inventors: John S Pilch
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-01-12
Filing date: 1953-01-12
Publication date: 1956-07-03
Anticipated expiration: 1973-07-03

Description

J. S. PILCH Jwii 3, 11%

LOADER 2 Sheets-Sheet 1 Filed Jan. 12, 195-3 9 NVENTOE.

United States Patent LOADER John S. Pilch, Ware, Mass. Application January 12, 1953, Serial No. 330,714

3 Claims. (Cl. 214-140) This invention relates to tractor mounted loaders and has particular reference to a new and improved push arm and bucket supporting structure for loaders.

This application is a continuation in part of my application filed March 17, 1950, Serial No. 150,230, and now abandoned.

An object of the invention is to provide a new and improved loader attachment for tractors.

Another object is to provide a loader attachment for tractors which may be formed of separate parts thereby facilitating the manufacture, shipping and assembly of the device on the vehicle, which may be secured together relatively quickly and easily to provide a semi-rigid, strong, durable construction with enough movement to eliminate breakage and distortion.

Another object is to provide a new and improved push arm construction for tractor mounted loaders, which construction is readily adaptable to various size loader buckets.

Another object is to provide a new and improved push arm construction for tractor mounted loaders which is relatively simple and inexpensive in construction and assembly, and adaptable to various sizes of loader buckets.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that changes may be made in the details of construction and arrangement of parts shown and described, as the preferred forms have been given by way of illustration only.

Referring to the drawings:

Fig. l is a side view of a tractor mounted loader embodying the invention;

Fig. 2 is a top or plan view of the apparatus shown in Fig. 1;

Fig. 3 is an exploded view of the bucket push arm con struction;

Fig. 4 is a fragmentary plan view of the push arm construction shown in Fig. 3; and

Fig. 5 is a view similar to Fig. modified form of the invention larger loader bucket.

Referring more particularly to the drawings, there is shown in Figs. 1 and 3 a tractor including engine 10, tracks 11 and driver or operator's seat 12. The tractor has the frame 13 on which are secured the

supports

14 and 15 on each side of the tractor and adjacent their upper ends is provided the pivots 16 for each of the push arms 17. Extending above pivot 16 is the extension 18 on which is pivotally mounted at 19 the loader bucket actuating cylinder 20.

The loader is hydraulically actuated through the hy draulic pump 21 which is actuated by the tractor engine and which receives fluid through hydraulic line 22 from tank 23 and supplies fluid under pressure through by draulic line 24 to control valve 25 which is controlled by the operator by means of operating levers 26.

Control valve 25 is connected to bucket actuating cylin- 4, but showing a slightly adapted for use with a ice ders 20 through

lines

27 and 28 which are connected to opposite ends of cylinders 20, and valve 25 is connected to push arm raising and lowering cylinders 29 which are pivotally connected at 30 to tractor frame 13 on each side of engine 10 by means of

hydraulic lines

31 and 32 which are connected to opposite ends of said cylinders 29.

Rams 33 are pivotally connected at 34 to pads on push arms 17 and positioned directly therebeneath and said rams extend into cylinders 29 and have double acting pistons adjacent their ends within said cylinders for raising and lowering push arms 17 and thereby raising and lowering bucket 35 which is pivotally mounted upon the forward ends of push arms 17, as hereinafter described. In Fig. 2 the rams 33 and cylinders 29 are shown between push arms 17 for the purpose of illustrating their relative positions only.

Rams 36 are pivotally connected at 37 to links 38 which are in turn pivotally connected at 39 to bucket 35 and said rams 36 extend into cylinders 20 and have double acting pistons adjacent their ends within said cylinders 20. Each of links 38 is connected by a link 40 to its re spective push arm 17, and said links 40 are pivotally connected at 41 to its link 38 and at 42 to :its push arm 17. This arrangement is provided for rotating bucket 35 relative to push arms 17 for loading and unloading.

With the prior type tractor mounted loaders, it has been customary to form the push arm assembly comprising a pair of spaced push arms 17 and its connecting brackets in a unitary structure. This has required different push arms for different bucket sizes and has also provided a relatively bulky and unwieldy construction for handling and shipping. In the present construction, the push arms 17 are each formed as separate units comprising the push arm proper to which is secured a bracket or the like 17a which may be reinforced with a gusset or strut 17b as shown in Fig. 4 or, if desired, such reinforcement may be eliminated as shown in Fig. 5.

When the push arm construction is used in conjunction with narrow or certain type buckets, the loader arms may be positioned with the members 17a toward each other as shown in Fig. 4-, and the members may be secured together by clamping or bolting, if desired, for added rigidity and strength, and when the construction is to be used with wider or other type buckets it may be adapted, as shown in Fig. 5, by reversing the position of the push arms 17 from left to right and vice versa with the members 17a each being directed outwardly from its push arm 17. The pivot rods 17c extend through aligned openings in the forward ends of the push arms 17 and the forwardly projecting portions of the members 17a and also extend through openings in the supports 35a on bucket 35 to provide a pivotable connection between bucket 35 and the forward ends of the push arms.

It will be seen from the foregoing that each of the push arms 17 and its member 17a are formed separately with or without the gusset or strut 17b, as set forth above, which which will then form a relatively simple element which is not unwieldy and bulky for shipment, and when the loader attachment is assembled onto the tractor the push arm members may be positioned in either of the positions shown in Fig. 4 or Fig. 5, depending upon the size or type of the loader bucket whereby a push arm construction is provided for loaders which is composed of a plurality of relatively similar members which are capable of being easily and quickly attached to the tractor in the manner desired.

With the pad 43 on each of push arms 17 having the pivots 34, the ram 33 may be easily and quickly connected to either of the pivots 34 depending upon the particular push arm to which the particular ram is to be connected.

It will be seen from the foregoing that I have provided a new and improved push arm construction for tractor mounted loaders capable of obtaining all of the objects and advantages of the invention.

I claim:

1. A convertible narrow or wide bucket loader comprising a tractor, a support mounted on each side of said tractor, a pivot means on each support, a pair of push arms for mounting selectively on either support, each push arm comprising a straight primary push member carrying a pivot means at one end for selective engagement with said pivot means mounted on said supports, an aperture at the opposite end 0t said primary push member to receive a pivot rod of a loader bucket, an L-shaped bracket mounted on said primary push member adjacent said opposite end and extending horizontally from said primary push member when mounted on one of said supports, the L-shaped bracket on one of said primary push members extending tothe right and on the other said primary push member extending to the left, said L- shaped bracket being provided with an aperture aligned with the aperture in the end of said primary push member, and a pivotal connection arranged on said push member for connection of hydraulic means for operation of said push arm whereby the push arms may be selectively mounted on said supports and connected to said hydraulic means with the said L-shaped brackets extending outwardly of said tractor from said primary push members or inwardly from said push members to engage a wide or narrow loading bucket.

2. The loader of claim 1 in which a single pivot rod is provided for engagement with the loader bucket and said aperture in the push members and L-shaped brackets.

3. The loader of claim 1 in which said L-shaped brackets when extending inwardly of the primary push members abut each other.

References Cited in the file of this patent UNITED STATES PATENTS 2,326,197 Blecha Aug. 10, 1943 2,511,439 Lacey June 13, 1950 2,535,727 Dingley Dec. 26, 1950 2,645,369 Allan July 14, 1953 2,679,120 Wooldridge May 25, 1954 2,665,022 Dunham Jan. 5, 1954