US2421566A - Hydraulic loader and stacker - Google Patents

Description

June 3, 1947.

s. w. KOBER 2,421,566

HYDRAULIC LOADER AND STACKER Filed March 20, 1945 2 SheetsSheet l v 50/0/7700 jib 56f June 3, 1947. w, KOBER HYDRAULIC LOADER AND STACKER Filed March 20, 1945 2 Sheets-Shaka: 2-

Patented June 3, 1947 UNITED STATES PATENT OFFICE HYDRAULIC LOADER AND STACKER Solomon W. Kober, Billings, Mont.

Application March 20, 1945, Serial No. 583,735 6 Claims. (01. 214-141) This invention relates to loading devices, and more particularly to an improved device for picking up and stacking hay and similar materials.

A main object of this invention is to provide a portable loading machine or loading device adapted to pick up hay or other materials from the ground and elevate the load for deposition at a desired location.

A further object of this invention is to provide a loader adapted to be mounted on a conventional tractor wherein tractor powered hydraulic lifting means is provided and wherein the lifting means may be readily controlled by the operator in the tractor.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a side elevational view with parts broken away of a tractor equipped with a loader according to this invention.

Figur 2 is a rear elevational view of the structure of Figure 1 with the loader shown in elevated position.

Figure 3 is a detail view in side elevation of the top portion of the loader of Figure 1 in elevated position.

Figure 4 is a detail view of the hydraulic supply system employed in the loader of Figure 1.

Figure 5 is an end elevational view of the structure of Figure 4.

Figure 6 is a side elevational view of a form of bucket member adapted to be employed on the loader of Figure 1 for use in loading manure.

Figure '7 is a top view of the bucket member of Figure 6.

Figure 8 is a side elevational View of another form of bucket member adapted to be employed on the loader of Figure 1 for use in loading beets.

Figure 9 is a top view of the bucket member of Figure 8.

Figure 10 is a perspective view of a sheet metal lining adapted to be secured inside the bucket member of Figure 8 for use in loading gravel or sand.

The loading device according to this invention is supported upon a conventional tractor, designated by l in the drawings, comprising a body 2 supported on large rear traction wheels 3 which ar mounted at the ends of rear axle housings 4 and which'are driven by the tractor power unit in the usual manner, and. front dirigible wheels 5 which are controlled for steering purposes by the steering wheel 6. The tractor is provided with a conventional rearwardly extending power take-ofi shaft 1.

Secured to the under side of the tractor frame are a pair of longitudinally extending base members 8 projecting rearwardly of rear Wheels 3. Rigidly secured to the ends of the rearwardly projecting portions of base members 8 is a transverse member 9. Rigidly secured to the junctions of member 9 and members 8 are vertical upright post members 10 rigidly held together at their top ends by a transvers member I I. Diagonal brace members l2 connect the opposite corners of the box-shaped structure formed by vertical posts l0 and transverse members 9 and II to stiffen and strengthen the structure in a transverse vertical plane. Rigidity in a longitudinal vertical plane is provided by a brace structure for each vertical post Hi comprising a gusset plate l3 secured adjacent the top of the post, a diagonal brace member I4 secured at its top end togusset plate l3 and a longitudinal member l5 secured at one end to vertical post H1, at the oth'er end to diagonal brace 14 and at an intermediate portion to the top of rear axle housing 4.

Mounted on the inwardly facing surfaces of vertical posts II] at a position substantially above the level of rear axle housing 4 are bearing seats "5 which rotatably support a transverse tubular member I! which projects laterally on each side of tractor l. Connected by elbows I8 to each end of tubular member I! are longitudinal tubular boom members l9 extending, in their normal horizontal positions, to substantially the front end of tractor body '2.

Telescopically mounted in each tubular boom I9 is an elongated piston member 20 rigidly secured at its outer end to an arm 2|. The rearward end of arm 2| is pivotally connected to one end of an adjustable cable 22, the adjustment being achieved by a turnbuckle member 23 secured to the other end of said cable 22 and connecting said cable to an eye lug 24 formed on gusset plate [3. Extension of piston member 20 causes arm 2| to swing upwardly in an arc whos radius is cable 22.

Pivotally connected to the forward end of each arm 2| is a link member 25 which forms a part of the framework of a bucket member generally indicated as 26. The top end of link member 25 is pivotally connected to an adjustable link 21 which in turn is connected pivotally by an adcent to its junction with link 28 is a control cable 29 which extends over a pulley 30, rotatably supported adjacent the top end of post I0, and around a pulley 3| mounted on the longitudinal member 8 at the opposite side of the tractor to a lever 32 operated by tractor power and provided with appropriate releasable locking means for holding it in desired adjusted positions. If desired, cable 29 may be connected to link 28 instead of link 21. 'By virtue of its cable connections to the bucket control linkages, lever 32 may be employed by the operator to vary the angle of inclination of bucket member 26 with respect to arm 2| over a considerable angular range, as indicated in Figure 3 where piston member 20 is shown in extended position with bucket member 26 raised. By releasing lever 32 the bucket member 26 may be allowed to rotate from the full line position to the dotted position shown in Figure 3.

The control linkages for bucket member 26-are he'l'din their respective longitudinal planes by a appropriately shouldered tie rod. 33. which forms the pivotal connection between links :27 :and 28 and which is upset or otherwise provided with. securing means at'its ends to maintain it in securing'position.

Piston members 2i} are extended to raisezbuoket member .26 by hydraulic pressure acting intubular sboom t9 behind piston members 20. EH16 pressure is furnished by oil forced into transverse tubular member I] through a plurality"of circumferentially spaced openings 34 tor-med :at an intermediate location in member 11', Encircling the openings 34 and rotatabl mounted on member I l is a housing member 35 provided'w'ith appropriate packing gland members .36 at each side thereof forming :a. substantially tight oilse'al between housing member 3'5 and tubular member I! jyet permitting relative rotation betweenxthe housing and the tubular member. An oil inlet pipe 31 admits oil into housing member 3:5. The oil is supplied from an oil reservoir mounted on the tractor through a pipe 38 :to a, pressure pump 3'9 actuated by power take-off shaft 1, and thence through an adjustable pressure overload relief valve 40 through -a three-way manually controlled valve 4 toinlet pipe 31.

In Figure *4 manually actuated valve d l is shown in open position wherein oil under pressure is forced by pump 39 .past overload relief valve W through valve 41 into inlet pipe :31. By rotating the handle of valve 41 ninety degrees counterclockwise from the -.position-shown in'CF igure 4, the oil under pressuremay be diverted into a by-pass pipe 42 leading back to the oil reservoir, and the pistons Zil-may be thus loc'ked'inextended position. By rotating the valve handle ninety degrees 'clockw isefrom the position shown in Figure '4, the oil in booms I 9 will be released and flow back'to'the oil reservoir through by-pass pipe 42, the oil under pressure "from *pump 39 .being diverted through a second by-pass branch pipe '43 back to main by-passpipe 42.

Ihe "oil tank is a high pressure tank provided with an overflow pipe having a is a'irhdle-in its end plug. It contains only just enougho'il-to extend the booms for raising the loader to its full safe height. When valve-4! is turned to release a the oil in the'boomathe oil returnsto the tank at an intially rapid rate but, due -to the small air exhaust hole in the tank the release of-the' booms is subsequently slowed down as thereturn'ing oil builds up air pressure in the tank. This feature cushions the last portion of the descent of *the 4 bucket member and reduces the risk of damage to said bucket member if it should strike the ground. It is thus seen that manual valve 4| affords an efficient degree of control over the application of hydraulic pressure to pistons 20 for all requirements of the loader. Said valve is located within convenient reach of the operator of the tractor.

The bucket member 26 may comprise an appropriate framework formed withlongitudinally projecting widely spaced bottom cleats or teeth members 4 for stacking hay. For stacking manure or similar material the bucket member shown in Figures 6 and 7 may be substituted, said bucket member comprising more closely spaced curved steel members 45 forming prongs, said curved members being secured together by upper and lower transverse tie bars 46, 41 welded to the members 45 and made rigid by side posts 48 welded'to the ends of the transverse tie bars.

For stacking beets, or similar material, the bucketmember shown inEigures B and 9 may be substituted for bucket member 2'6. In Figures 8 and 9 the bucket member comprises closely spaced curved steel bars 49 rigidly secured by welding or :other appropriate securing means to transverse tie members to form a rigid bucket structure, guard plates 50 being provided at the sides of the bucket to prevent material from flowins out of the sides of the bucket. This structure may be further adapted for use in loading sand and" gravel by securing to the inner surfaces of the bucket. member a curved sheet metal member Bil said member :51 being formed with vertical flanges. '52 adapted to be secured .to guard plates 50. Using this form of bucket, the loader maybe employed as .a. :bull-dozer with the booms l9 maintained in substantially horizontal position or .as shown in Figure 1.

In ordinary loading operation the bucket member is held in lowered position and the tractor is movedforwardlytoward the material to 'be loaded whereby said material is forced into engagement with the bucket member. The operator then -ac- 'tuates valve '4! to the position shown in Figure 4 to admit oil under pressure behind pistons 20 to thereby raise the bucket member to the elevated position such asshown in Figures 2 and 3. Valve 4| is then actuated by rotating its handle ninety degrees acounter clockwise .to lock pistons in extended "position and the load is then carried by the tractor to the desired location. The load is deposited by releasing lever 32, and the valve handle may :then be. rotated one-hundred eighty degrees clockwise to lower the booms, lever 32 being returned. to its normalposition to set the bucket for a repeated loading operation.

By positioning the thrust bearing imernbers -l=.6':for booms i9 substantially .above the level of rear axle housings 4 positive traction. for the :rear wheels during the forward thrust of the bucket into the pile of material is assured, since there-- active moment is clockwise with. respect to the front wheels of the tractor. This feature "is of importance when qperating'on slippery ormuddy '-surfaces. If the;positionof therear thrust hear- :ing members for the booms were :below the devel of the axles a moment would be developed'cdun. ing :torwardthrust of the bucket which would reduce traction :and which would 'tend. to .liftv the :rear wheels.

While certain specific eembodiments of loading devices :have been disclosed in the foregoing 'description, itwill be understood-that various modiiications within the spirit of the inventionmay occur to those skilled in the art. Therefore, it

supported rearwardly of the rear Wheels of the tractor, telescoping booms positioned at opposite sides of the tractor, said booms being pivotally connected at their rear ends to the frame at a level above the level of and spaced to the rear of the rear wheel axles of the tractor for up and down movements at their forward ends, load carrying means on said forward ends, means for extending the booms lengthwise in a forward direction, radius means embodying an arm rigidly carried by each of the forward ends of the booms and a flexible member connecting the rearward end of each of said arms pivotally to the upper end of an upstanding post of said frame complemental thereto, said radius means being mounted for up and down swinging movements and being operative to guide the booms upwardly responsive to extension of the booms.

2. A tractor mounted loading device comprising a frame including upstanding posts rigidly supported rearwardly of the rear wheels of the tractor, telescoping booms positioned at opposite sides of the tractor, said booms being pivotally connected at their rear ends to the frame at a level above the level of and spaced to the rear of the rear wheel axles of the tractor for up and down movements at their forward ends, load carrying means on said forward ends, a fluid pump connected to the tractor and operated thereby, a fluid supply means, means for conducting fluid under pressure to the booms for projecting the forward ends thereof in a forward direction, and radius members embodying an arm rigidly carried by each of the forward ends of the booms and a flexible member connecting the rearward end of each of said arms to the upper portion of an upstanding post of said frame complemental thereto operative to guide the booms upwardly as they are projected forwardly.

3. A tractor mounted loading device comprising a frame including upstanding posts rigidly supported rearwardly of the rear wheels of the tractor, telescoping booms positioned at opposite sides of the tractor, said booms being pivotally connected at their rear ends to the frame at a level above the level of and spaced to the rear of the rear wheel axles of the tractor for up and down movements at their forward ends, means for extending the booms lengthwise, radius members embodying an arm rigidly carried by each of the forward ends of the booms and a cable adjustably connecting the rearward end of each of said arms to the upper portion of an upstanding post of said frame complemental thereto for guiding the forward ends of the booms upwardly in response to extension of the booms, a bucket member pivotally carried by said arms and tiltable forwardly and rearwardly thereon, and cable means connected between the frame and the bucket member for tilting the bucket member.

4. The structure of claim 1, and wherein the load carrying means comprises a bucket member pivotally secured to said forward ends and tiltable forwardly and rearwardly thereon, and control means for adjusting the tilt of said bucket, said control means comprising a linkage connected to said bucket and cable means for operating said linkage.

5. The structure of claim 2, and wherein the booms are pivotally connected to the frame by a transverse tubular member connected to and communicating with the interior of the booms at their rear ends, said transverse tubular member being rotatably supported in bearing means provided on the frameand wherein said means for conducting fluid under pressure to the booms comprises openings formed peripherally at an intermediate point on said transverse tubular member said openings being housed in a housing member rotatively mounted with respect to said transverse tubular member and provided with means for sealing said housing member with respect to said transverse tubular member, said fluid pump being connected to said housing member.

6. A tractor mounted loading device comprising a frame rigidly supported rearwardly of the rear wheels of the tractor, telescoping booms positioned at opposite sides of the tractor, said booms being pivotally connected at their rear ends to the frame at a level above the level of the rear wheel axles of the tractor for up and down movements at their forward ends, means for extending the booms lengthwise, radius members connected between the frame and the booms for guiding the forward ends of the booms upwardly in response to, extension of the booms, a bucket member pivotally mounted on the forward ends of the booms and tiltable forwardly and rearwardly thereon, and cable means connected between the frame and the bucket member for tilting the bucket member, said bucket member comprises a plurality of aligned curved rigid members provided with transverse bar members secured to the curved members to make rigid said curved members to form a scoop-shaped body, and wherein sheet members are secured at the sides of the scoop-shaped body to form side guards.

SOLOMON W. KOBER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 890,061 Jarboe June 9, 1908 947,964 Collins Feb. 1, 1910 1,784,558 Underland Dec. 9, 1930 1,913,472 Blumberg et a1 June 13, 1933 2,220,267 Nelson Nov. 5, 1940 2,287,375 Ford June 23, 1942 2,295,917 Schwan Sept. 15, 1942 2,319,921 Dooley et a1 May 25, 1943 2,348,899 Guignard et al. May 16, 1944 2,351,926 Coates June 20, 1944

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