Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3575307 A
Publication typeGrant
Publication dateApr 20, 1971
Filing dateOct 21, 1968
Priority dateNov 13, 1967
Also published asDE1807981A1
Publication numberUS 3575307 A, US 3575307A, US-A-3575307, US3575307 A, US3575307A
InventorsGuinot Gabriel L
Original AssigneePoclain Sa
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Earthworking machines
US 3575307 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent Gabriel L. Guinot Le Plessis-Belleville, France 769,125

Oct. 21, 1968 Apr. 20, 1971 Societe Anonyme Poclain [72] Inventor [2| Appl. No. [22] Filed [45] Patented {73] Assignee Oise, France [32] Priority Nov. 13, 1967 [33] France [3 1 127,920

[54] EARTHWORKING MACHINES 3 Claims, 3 Drawing Figs.

[52] U.S.C1 [51] Int. Cl E021 3/75 [50] Field oISearch 214/140,

[56] References Cited UNITED STATES PATENTS 2,790,568 4/1957 Mandt 214/132 3,231,114 1/1966 LeTourneau... 214/132 3,241,693 3/1966 Stroker 214/132X 3,484,005 12/1969 Guinot 214/140X Primary Examiner--Gerald M. Forlenza Assistant Examiner-Lawrence Oresky Attorney-Mason, Fenwick & Lawrence ABSTRACT: An earthworking machine with at least two beams supporting selected earthworking implements. The beams are mounted on the chassis and adapted to rotate. Actuating means are provided for the beams and earthworking implements.

EARTI'IWORKING MACHINES This invention relates to earthworking machines, Agricultural tractors are already known, which have on a single chassis a loading equipment at the front, and, at the rear a retro equipment, i.e. one in which the line of operation of the digging tool is towards the vehicle. It should be understood very easily adaptable to various working conditions, particularly as regards the kinds of work and the types of terrain worked upon.

According to the invention, an earthworking machine comprises at least two equipments as defined above mounted respectively at the ends of corresponding beams, the beams themselves being mounted on at least one turret pivotablc about a pivot fixed to a single chassis. The equipment used may befor example a loader-leveller, a "retro" bucket, grab, etc.

In order that the invention may be more fully understood, some embodiments in accordance therewith will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. I is a side elevation of one embodiment of an earthworking machine of the invention;

FIG. 2 is an alternative embodiment of the machine of the invention; and

FIG. 3 is a further embodiment of the machine of the invention.

Referring to the drawings, FIG. I shows an earthworking machine of the invention comprising a single self-propelled chassis I carrying a pivot 2 on which pivots a turret 3 carrying two equipments 4 and 5 and having means for rotating the turret and stopping rotation thereof (not shown).

One of the equipments 4 comprises, for example, a retro" bucket 6 and the other equipment 5 comprises a loaderleveller bucket 7. These two equipments are mounted respectively at the ends of beams 8 and 9 fixed to the turret 3 and'preferably substantially symmetrical with respect to the axis it): of the pivot 2. The two beams 8 and 9 thus move in a single vertical plane which contains the axis X): of the pivot 2 and can pivot simultaneously about this axis.

One of the advantages of this arrangement, over and above the rapidity with which an operator can change from one equipment to the other and back again, is that the equipments 4 and 5 each constitute a counterweight for the other which is automatically established in the vertical working plane of the equipment concerned. This counterweight is adjustable in reach by manipulating the beam, for example, (8 or 9) and in load by filling to a greater or lesser extent the bucket 6 or 7.

When it is used as a counterweight, the equipment 5 is preferably retracted completely as shown in dotted lines, the bucket 7 being suitably filled. The swing and the area through which this equipment sweeps is thus reduced. This counterweight can thus be rapidly and accurately weighted and the machine balanced.

In accordance with another advantage of this machine, one of the equipments (the equipment 5 for example) can bear on the ground (as shown in FIG. 1) and thus ensure, by stopping movement of the turret 3, in conjunction with the usual feet 10, an increase in adherence and stability of the machine when the equipment .4 is working. This additional support can also enable the equipment 4 to exert its maximum force on the ground, whatever may be the orientation of the turret 3.

Finally, by applying the two equipments 4 and 5 to the ground simultaneously, the chassis I of the machine can be raised in order, for example, to free it and orientate it in another direction. I

Moreover, this arrangement can be mod fied by providing other equipments on beams mounted on the turret 3 and preferably distributed symmetrically with respect to the axis x'x. As was seen above, when one of these equipments is operating, the others are used as counterweights which may or may not be variable, or as additional support or locking members for the turret or the machine.

FIG. 2 shows an alternative embodiment of the invention, in which the two beams 8 and 9 carrying the equipments 4 and 5 are mounted on two independent turrets 11 and 12, which are themselves both mounted on the pivot 2. Means (not shown) are provided to drive the two turrets II and 12 in rotation independently of each other and, if necessary, to lock one with respect to the other. This embodiment offers the same advantages as the machine shown in FIG. 1 and provides greater flexibility, particularly as regards the stability of the machine.

Thus, on difficult terrain the equipment 5, for example, can bear on the ground according to the irregularities, the inclination or makeup of the terrain, independently of the zone of operation of the equipment 4, in order to ensure a firm stance for the machine. This equipment 5 can also constitute a counterweight for the equipment 4.

By locking the turret 12 with respect to the turret I1, particularly so that the equipments 4 and 5 are substantially symmetrical with respect to the axis x-x, there is obtained the machine of FIG. 1. Moreover, should the machine become stuck, it is also easy by means of the equipments 4 and 5 to exert pressure on the ground so as to partially or completely lift the chassis and orientate it in another direction.

FIG. 3 shows another embodiment of the machine of the invention which is similar to that shown in FIG. 2. The two equipments 4 and 5 of the machine are pivotally mounted independently of each other, the two corresponding turrets l3 and 14 being mounted on two separate pivots l5 and 16 fixed to the chassis l. The axes yy and z: of the pivots l5 and 16 are distributed so as to ensure stable balancing and a solid stance for the machine during work carried out by one or other of the equipments.

This arrangement not only has the advantages of the embodiment of FIG. 2, but also has better stability than the latter. The axes y'y and z'z, which are shown here in the medial longitudinal plane of the chassis 1, could of course be in any plane. Moreover, in the embodiment of FIG. 3, when the turrets l3 and 14 are coupled, i.e. when any displacement of one causes displacement of the other in the same direction of rotation, this is practically the equivalent of the machine of FIG. 1 as regards the mutual balancing of the equipments.


I. An earthworking machine comprising a chassis, a first turret mounted for rotation about an axis of rotation on said chassis, a first beam means having one end connected to said first turret and extending from said first turret, an earthworking implement mounted on the end of said first beam means opposite the end of said beam connected to said first turret, a second turret mounted for rotation on said chassis coaxially with said first turret, a second beam means having one end connected to said second turret and extending from said second turret and a second earthworking implement mounted on the end of said second beam means opposite the connection of said second beam to said second turret whereby either of said earthworking implements is usable as a counterweight to the other earthworking implements during operation of the other earthworking implement of the machine.

2. The invention of claim I wherein said axis of rotation of said first and second turret is positioned intermediate the ends of said chassis.

3. The invention of claim 2 wherein said first turret and said second turret are adjacent each other in vertical alignment and said axis of rotation is a vertical axis.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2790568 *Jun 30, 1955Apr 30, 1957Mandt Vernon GSwing-type material moving machine
US3231114 *Nov 26, 1963Jan 25, 1966Letourneau Robert GEarthworking machine
US3241693 *Dec 24, 1962Mar 22, 1966Schade Gustav FaLoading arrangement
US3484005 *Apr 24, 1967Dec 16, 1969Poclain SaEarth working machine
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4266908 *Jun 21, 1979May 12, 1981Leiker Donald GExcavating apparatus
US4596508 *Jun 13, 1983Jun 24, 1986Mitsuhiro KishiEarth-working machine
US7730648 *Sep 19, 2008Jun 8, 2010Hiroshi FukayaConstruction vehicle
EP0283286A2 *Mar 17, 1988Sep 21, 1988Anderson Group PlcApparatus for removing a surface layer from the ground
U.S. Classification414/694
International ClassificationE02F3/28, E02F3/96, E02F9/12, E02F3/32, E02F3/04, E02F9/08
Cooperative ClassificationE02F3/964, E02F9/121
European ClassificationE02F9/12B, E02F3/96D2