US2755572A

US2755572A - Loader

Info

Publication number: US2755572A
Application number: US308179A
Authority: US
Inventors: John S Pilch
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-09-06
Filing date: 1952-09-06
Publication date: 1956-07-24
Anticipated expiration: 1973-07-24

Description

J. s. PILCH LOADER 5 Sheets-Sheet 1 Filed Sept. e, 1952 m. w mi MH M Q f N mul. m l\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ s. M M \M/Z CL E- m o J J. S. PILCH July 24, 1956 LOADER 5 Sheets-Sheet 2 Filed Sept. 6, 1952 INVENTOR. JOH N PILCH ATTO NES( July 24, 1956 J. s. PILCH 2,755,572

LOADER Filed sept. e, 1952 s Samus-sheet s INVENTOR. JOHN S. 'PILC H ATTE/s/Ew J. S. PILCH July 24, 1956 LOADER 5 Sheets-Sheet 4 Filed Sept. 6, 1952 INVENTOR. JOHN S `PILCl- BY ATTOP EK July 24, 1956 J. s. PILCH 2,755,572

LOADER Filed Sept. 6, 1952 5 Sheets-Sheet 5 INVENTOR.

ATTOPNEY LOADER .lohn S. Pilch, Ware, Mass.

Application September 6, 1952, Serial No. 308,179

7 Claims. (Cl. 37-117.5)

This invention relates to tractor mounted apparatus and has particular reference to a new and improved tractor mounted loader and bulldozer which is relatively simple and economical in construction, yet more rugged than prior constructions and which may easily and quickly be converted for use either as a loader or dozer as desired.

An object of the present invention is to provide a new and improved tractor mounted combined dozer and loader which is relatively simple and inexpensive in construction and elicient in operation.

Ano-ther object is to provide a tractor mounted combined dozer and loader apparatus comprising relatively few parts and which may easily and quickly be converted from a dozer to a loader and vice versa.

Another object is to provide a new and improved tractor mounted combined dozer and loader utilizing elements common to both.

Another object is to provide a new and improved supporting arrangement for tractor mounted apparatus which is relatively simple and less expensive in construction, yet more rugged than prior type supports.

Another object is to provide a support of the type set forth which is formed and attached without the necessity of welding and, therefore, providing a simplified, less expensive construction to manufacture and assemble.

Another object is to provide a new and improved tractor mounted loader apparatus.

Another object is to provide a new and improved tractor mounted dozer apparatus.

Another object is to provide a new and improved push arm construction for tractor mounted apparatus and the like.

Another object is to provide a new and improved apparatus of the type set forth which may be converted from a dozer to a loader or vice versa without discon. nection of the push arm actuating cylinders.

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

Referring to the drawings:

Fig. l is a side view of an apparatus embodying the invention adapted for use as a loader;

Fig. 2 is a side view generally similar to Fig. 1, but showing the apparatus adapted for use as a dozer;

Fig. 3 is a top or plan view of the apparatus shown in Fig. l;

Fig. 4 is a front view of the apparatus shown in Figs. l and 3;

Fig. 5 is a sectional view taken on line 5-5 of Fig. l, looking in the direction of the arrows;

Fig. 6 is a sectional view generally similar to Fig. 5, but showing a modified form of the invention; and

nited States Patent Fig. 7 is a side view of another form of the apparatus of the invention.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout, the apparatus shown in the drawings is adapted for use on a tractor having the engine 10, frame 11, tracks 12 and operators seat 13.

The tractor is provided with the engine guard 14 which is retained in aligned position with the radiator of the tractor by the supports 15l which are secured to the frame 11 on opposite sides of the engine 10, and the supporting members 15' are integral or unitary as shown in Fig. 3, and have the central portion thereof formed to extend around the end of the tractor engine and have the guard 14 secured thereon.

Both the loader arrangement of Fig. l and the dozer arrangement of Fig. 2 are supported on the tractor by means of the substantially triangular upright supports 18, one of which is provided on each side of the tractor and which is secured by the clamp 19 to the dead axle of the tractor to thereby secure one end of the support 18 and the forward end of said support is secured tothe tractor frame 11 by clamp or the like 20 and, therefore, the upright supports 18 are rigidly secured to the supports 21 to rigidly position the said supports 18 on the tractor on opposite sides thereof. If desired, the clamp 19 may have the portion 19a formed as a clamp only or the counterweight 19h may be secured thereto as desired.

The depending supports 22 are secured on opposite sides of the tractor and are provided with the two or rnore pivot points. 23 and 24.

The supports 18 are each provided with the pivot connections 25 adjacent the upper ends thereof.

When the apparatus is adapted for use as a loader, as shownin Fig. l, the push arms 26 are `each pivotally connected to one of the pivot connections 25, as shown in Fig. 1, and the bucket 27 is pivotally connected to push arms 26 adjacent the forward or free yends thereof. The push arms 26 are provided with the pivot supports 28 and 29 on opposite sides thereof, with the extension 29 being positioned forwardly of the extension 28 and having the double acting cylinder 30 pivotally connected thereto with the ram 31 pivotally connected to bucket 27 at 32, whereby the cylinder 30 and ram 31 serve to pivot the earth handling implement in this case bucket 27 about its pivotal connection to the push arms 26.

The pivot connection 28 which is positioned on the opposite side of push arm 26 from pivot connection 29, is pivotally connected to the ram 33 which extends into double acting cylinder 34, which in this instance is pivotally connected to the pivot connection 23.

The

cylinders

34 and 30 are each connected` to the hydraulic system through the sets of

lines

35 and 36 respectively, and which are adapted to be controlled by the -operating lever 37 for the control valve 38. Hydraulic power for operating the hydraulic system is furnished through the hydraulic pump 39 which is connected to control valve 38 in the usual manner.

When it is desired to convert the apparatus tot a dozer, the bucket 27 is removed and the push arms 26 disconnected from pivot 25 vand cylinders 34 disconnected from pivots 23 and the position of push arms 26 reversed, that is, they are turned up side down andthe ends of cylinders 34 which were formerly connected to pivots 23 are pivotally connected to pivots 25 on support 18 and push arms 26 are pivotally connected to pivots 24 von support 22. Bucket 27 is replaced by the earth handling implement in this case dozer blade 40 which is pivotally connected at 41 to the forward ends of the push arms 26 and the connecting link 42 which is pivotally connected at 43 to dozer blade 40 are then pivotally connected to the pivots 29. Y

It will be seen from the above that by merely removing the dozer blade 4t) or bucket 27 and reversing the position of the push arms and the connection of the cylinders 34 that the device can be readily and easily converted for use either as a loader or dozer.

It will also be seen that by Arrreans of the supports 18, as previously described, the apparatus may be secured to a tractor without welding and to provide a streamlined, less expensive, more rugged construction.

lt will be noted that Athe cylinders 34 are positioned behind the supports 18 and, therefore, the supports act as a guard for the cylinders 34.

In forming each of the push arms 26 a pair of oppositely disposed channel or U-,shaped

members

44 and 45 are positioned, as shown in Fig. 5, with their internal edges or

lips

46 and 47 in adjacent relation, and then by welding as at 48 and 49 the

members

44 and 45 are rigidly secured together to form a relatively lightweight, rugged and economical push arm construction.

In the push arrn construction shown in Fig. 6, the

meml bers

44 and 45 are formed without the inturned

lips

46 and 47 but have the bar or plate 49 positioned therebetween with the plate or bar 49 being of slightly less width than the

sections

44 and 45 whereupon by welding in the spaces Si), the

channel members

44 and 45 may be rigidly secured together to form a relatively less expensive, more rugged push arm construction.

ln the form of the apparatus shown in Fig. 7, the loader construction is similar to that of Fig. 1 except that the pivot connections on loader push arms 26 for bucket operating cylinders 30 is at 30a directly on the push arms whereby the loader push arms may be removed and inverted and pivotally connected to pivot connection for adaption as dozer arms and cylinder 30 and ram 31 pivoted to the opposite side of push arms 26 and connected at 32a to dozer blade 40 whereby the same cylinders and rams may be utilized to actuate bucket 27 and dozer blade 40.

An important feature of the present invention is that it allows the utilization of the apparatus either as a loader or tractor without the disconnection of the hoses for the push arm operating cylinders.

From the foregoing it will be seen that I have provided simple, eicient, and economical means for obtaining all of the objects and advantages of the invention.

I claim:

l. In a tractor mounted apparatus, a pair of push arms carried by the tractor, hydraulic means pivotally connected to said push arms for raising and lowering said push arms, supports on the yopposite sides of said tractor and extending upwardly from the tractor frame and having pivotal connections adjacent their upper ends, supporting brackets depending from the tractor frame on the opposite sides of the tractor and having pivotal connections, said push arms having pivotal connections adjacent the inner ends thereof for alternate .connection to said pivotal connections on said upwardly extending supports and supporting brackets and second pivotal connections for one end of said hydraulic means, said hydraulic means being connected at their other end to said supports adjacent the upper ends thereof when said push arms are connected to said supporting brackets and said hydraulic means being connected also at their other end to said supporting brackets upon a reversal of said push arms, when said push arms are to be connected to said supports adjacent their upper ends, whereby said push arms may be used for supporting a dozer blade when connected to said supporting brackets or a loader bucket when connected to said supports vadjacent their upper ends, while utilizing the same hydraulic means and without detaching the hydraulic means therefrom.

2. In a tractor'mounted apparatus, a pair of push arms carried by the tractor, hydraulic means pivotally connected to said push arms -for yraising and lowering said push arms, supports on the opposite sides of said tractor .4 and extending upwardly from the tractor frame and having pivotal connections adjacent their upper ends, sup porting brackets depending from the tractor frame on the opposite sides of the tractor and having pivotal connections, said push arms having pivotal connections adjacent the inner ends thereof for alternate connection to said pivotal connections on said upwardly extending supports and said supporting brackets and second pivotal connections for one end of said hydraulic means, said hydraulic means being connected at their other end to said supports adjacent the upper ends thereof when said push arms are connected to said supporting brackets and said hydraulic means being connected also at their other end to said supporting brackets upon a reversal of said push arms, when said push arms are to be connected to said supports adjacent their upper ends, whereby said push arms may be used for supporting a dozer blade when connected to said supporting brackets or a loader bucket when connected to said supports .adjacent their upper ends, while utilizing thesame hydraulic means and without detaching the hydraulic means therefrom, said supports having clamp means for connection to the dead axle of the tractor.

3. in a tractor mounted apparatus, a pair of push arms carried by the tractor, hydraulic means pivotally connected to said push arms for raising and lowering said push arms, supports on the opposite sides of said tractor and extending upwardly from the tractor frame and having pivotal connections adjacent their upper ends, supporting brackets depending from the tractor frame on the opposite sides of the tractor and having pivotal connections, said push arms having pivotal connections adjacent the inner ends thereof for alternate connection to said pivotal connections on said upwardly extending supports and supporting brackets and second pivotal connections for one end of said hydraulic means, said hydraulic means being connected at their other end to said supports adjacent the upper ends thereof when said push arms are connected to said supporting brackets and said hydraulic means being connected also at their other end to said supporting brackets upon a reversal of said push arms, when said push arms are to be connected to said supports adjacent their upper ends, whereby said push arms may be used for'supporting a dozer blade when connected to said supporting brackets .or a loader bucket when connected to said supports adjacent their upper ends, while utilizing the same hydraulic means and without detaching the hydraulic means therefrom, said supports being substantially triangular in shape and having clamp means adjacent the rear corner thereof for connection to the dead axle of the tractor.

4. A tractor mounted convertible earth handling device comprising a pair of supports, one of said supports being secured on each side of the tractor and extending upwardly therefrom, each of said supports having means for connecting said support to the tractor frame and having a pivotal connection adjacent its upper end, a supporting bracket depending from the tractor frame below each of said supports, a pivotal connection on each said bracket, a push arm adapted to be selectively pivotally connected to each of said supports or to each of said depending brackets, and a pair of hydraulic piston and cylinder means each adapted to be pivotally connected at one end to one of said push arms and at the other end to said pivotal connection on an adjacent support when said push arms are mounted on said brackets in position for use with a bulldozer blade, said push arms and said hydraulic piston and cylinder means being adapted to be demounted as a unit and remounted on said support and on said bracket respectively'to -place said push arms in position for use with a loader.

5. The device of claim 4 in which each said push arm is provided at its forward end with a forward mounting for a bulldozer blade or loader, a hydraulic cylinder and piston means mounted on each of said push arms adjacent said forward mounting, said hydraulic cylinder and piston means being also provided with a forward mounting for connection to the bulldozer blade or loader.

6. An attachment for a tractor for selective use as a bulldozer or a loader, comprising a pair of supports tixedly mounted one on each side of a tractor frame, and extending upwardly therefrom, a pivotal connection adjacent the upper end of each said support, a pair of downwardly extending portions associated with said supports, each said portion being provided with at least one pivotal mounting, a pair of push arms one for each side of said tractor, each said arm being selectively mountable on the pivotal connection or the pivotal mounting of a support and a portion, respectively, on one side of the tractor to extend forwardly thereon, a hydraulic piston and cylinder device pivotally connected to each said push arm forwardly of its mounting and arranged for selective connection with said pivotal connection or said pivotal mounting respectively, whereby said push arms may be used selectively to actuate a bulldozer blade or a loading bucket mounted on the forward ends thereof upon disconnecting said push arms from their mounting on said supports and reconnecting the push arms in inverted position to said portions with a corresponding disconnection of the hydraulic cylinder assemblies to said portions and a reconnection to said supports, respectively.

7. The device of claim 6 in which said downwardly extending portions are each provided with two pivotal mountings, the lower said mounting of each being used to mount the p-ush arms for bulldozing use and the upper said mounting of each being used to mount the hydraulic piston and cylinder devices for loading use.

References Cited in the ile of this patent UNITED STATES PATENTS 2,048,561 Neveling July 21, 1936 2,198,147 Austin Apr. 23, 1940 2,339,518 Reisser Jan. 18, 1944 2,377,495 Hofmeister June 5, 1945 2,420,027 Austin May 6, 1947 2,449,279 Conklin Sept. 14, 1948 2,494,225 Blake Jan. 10, 1950 2,517,582 Lull Aug. 8, 1950 2,519,974 Mork Aug. 22, 1950 2,610,754 Inskeep Sept. 16, 1952 2,626,470 Cook et al. Jan. 27, 1953