US1519117A - Crane-truck outrigger - Google Patents

Description

Dec. 16, 1924. y C 1,519,117

v C. E. COCHRAN CRANE TRUCK OUTRIGGER y Filed sept. 14, 1922 v 2 sheets-sheet 1 jlllVn f0.1"

@Acfw By @MJ Dec. 16, 1924. 1,519,117

C. E. COCHRAN CRANE TRUCK OUTRIGGER Filed sept. 14, 1922 2 sheets-sheet 2 f CHO Y /f/ o I o I o l, i Z4 ,f l r e fj f3 f v l 5.74. 3f

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ffm/en for We Patented Dec. 16, 1924.

UNITED STATES 'PATENT OFFICE.

CLYDE E. COCHRAN, OF CLEVELAND, OHIO, ASSIGNR TO THE ELWELL-IE'ARKER ELECTRIC COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

CRANE-TRUCK O'UTRIGGER.

Application led September 14, 1922.l Serial No. 588,283.

To all 'whom it may concern.'

Be it known that I, CLYDE E. COCHRAN,

a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and l State of Ohio, have invented a certain new and useful Improvement in Crane-Truck Outriggers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to industrial trucks and particularly to that typeV of truck known as industrial crane trucks, inwhich there is mounted upon the truck a rotatable frame for lifting loads from the Hoor or ground, and placing them upon the platform of the truck, the trucks usually being selfpropelled.

The present invention is shown as elnbodied in an industrial truck of the type shown, described, and claimed in my Patent No. 1,481,351 issued January 22,1924, showing driving wheels at the forward end o-f the truck within an upright extension over which may extend the battery box, and motor, serving as a counter balance for the crane, whereby the crane may pick up a load and place it upon a platform forming an extension rearwardly from the upright portion, and supported upon smaller wheels.

An object of the invention is to provide a simple, e'ective Outrigger at each side of the truck, which may be conveniently operated to extend the normal base defined by thc wheels of the truck, and which may be adjustable to render -it rigid when in active position regardless of unevennesses of the iioor or ground.

A further object is to so arrange sucl` outrigger so that it may be conveniently carried by the truck, when idle, without extending from the sides thereof.

A more specic object is to construct the Outrigger, that it may consist of a swinging bracket arm, and a jack, pivoted at the outer end of the arm. The jack is adapted to be swung u Wardly and carried by the arm and then to swung inwardly over the platform standing at the rear of the upright extension. Thus when the truck is passing through narrow highways, and the like, difculties of lateral projections are avoided. Still another object is to so arrange the drawings, and the essential characteristics f will be summarized in the claims.

In the drawings, Fig. 1 is an elevation of an industrial truck having an Outrigger constructed according to my invention; Fig. 2 is an end elevation of said truck with one of the Outrigger supports in operative position and with the boom swung at right angles to the truck platform; Fig. 3 is a perspective view of a portion of the truck showing the Outrigger support swung outwardly from the truck platform. Fig. 4 is an elevation partly in section of a connection between the jack and the pivotal support therefor.

My invention is illustrated in connection with a four-wheel industrial truck having a platform 10 supporting wheels 11 and 12 having provision for supporting a boom 13 which is adapted to be swung to either side of a truck platform and to be moved verticallyby suitable mechanism upon the truck. Under ordinary circumstances, when a load is suspended on either side of a truck platform, the center of gravity of the. load and truck must be maintained with an area outlined by four points of contact of the supporting wheels with the ground.

My invention is directed toward the provision of means for enabling the center of gravity of the load truck to be shifted laterally outside the plane of two aligned wheels of the truck whereby for any given radius of boom action, a heavier lo-ad may be raised. Such means will now be deing moved.

form as shown in Fig. 1, and, when in use, to be moved laterally to project outwardly from the platform, as shown in Figs 2 and 3. Adjacent the outer end of the arm and preferably pivoted thereon, I provide a jack, indicated generally at 20. which is adapted to be swung downwardly to engage the ground or floor.

The arm 19 is shown as a triangular member having ears 21 which rotatably embrace the pivotal support 18, the supportl .being shown as a bolt extending through the angle plates 16 and 17. The hypotenuse of the bracket arm is shown as having a recessed portion at 22 adjacentthe head 23 within which the jack is rotatably mounted. This recessed portion is suliicient to receive the jack when folded upwardly, as indicated in Figs. 1 and 2. In this manner, the jack is securely held in position against inadvertent displacement while the truck is be- The jack is shown as havingl a swiveled block 24 -which is provided with openings for receiving a hand lever 25 whereby the jack may be operated in the usual manner. To mount the jack within the head, I have shown an extension 26 which is adapted to i enter a recess 29 in the head 23. This extension may 'have an annular groove 27 which is arranged to be engaged by a pin 28 passing tangentially through the groove and anchored to the head. In this way the standard having the handle 30 may be spun about the spindle 31 until the base engages the ground or other supporting surface, whereupon the jack may be tightened by suitable voperation of the hand lever 25.

When it is desired to use the Outrigger for raising loads which are ositioned laterally of the truck, he bracket is swung outwardly over the edge of the truck platform, and the jack is lifted from its support and swun downwardly. The jack is then adjuste until it is in firm engagement with thel ground. Then the boom may be swung outwardly over the side of the platform in the usual manner to raise a load. As soon as the load is raised, swung over and placed upon the platform, the jack may be quickly replaced within the recess 22, and on the arm 19, whereupon the arm may be swung to the original position over the truck platform. In this way, the arm does not project laterally while the truck is traveling so that the side clearance required is not increased over that required for existing trucks. A

Having' thus described my invention, I claim 1. In a truck having supporting wheels, the combination with a platform, of a inember carried thereby and adapted to be swung outwardly over the edge of the platform about. a substantially vertical axis, and a jack pivotally and adapted to be swung upwardly and supported on the member. l

2. In a device of the class described, the

'combination with a supporting surface, of a bracket pivotall mounted thereon to swing about a vertica axis, and a jack pivotally supported on the bracket.

, 3. In a device of the class described, the combination with a support, of an arm piv oted on the support and adapted to swing in a horizontal plane, and a jack pivoted to the free end of the arm, and adapted to be swung in a vertical plane.

4. In a device of the class described, the combination with a supporting surface, of a bracket pivoted thereon so as to swing in a horizontal plane, a member carried by the bracket and pivoted to swing inl a vertical plane, and a jack associated with said mem- 5. In a device of the class described, the combination with a support, of a bracket mounted thereon and having a recess therein, and a jack pivotally connected to the bracket and adapted to be supported in one position within said recess.

6. In a device of the class described, the combination with a truck platform, of an Outrigger mounted thereon, said Outrigger comprising a bracket pivoted vto swing outwardly over the edge of the platform about a vertical axis, a member pivotally connected to the free end of the bracket, and a jack rotatably mounted on the member.

7. In a device of the class described, the combination with a supporting surface, of a bracket pivoted to said surface and having bifurcated portions adjacent the outer end thereof, and a jack pivotally mounted on the bracket and adapted tobe folded upwardly and to lie within the bifurcated portion, whereby the jack and bracket when in use may be swung inwardly over the support.

8. In a device of4 the class described, the combination with a support, of a substantially right triangular arm pivoted thereon to swing in about a vertical axis, and a jack pivoted adjacent an apex of the arm to Swing in a vertical plane, the hypotenuse of said arm being recessed to receive said jack. 9. In a device of the class described, the combination with a truck platform, of a standard carried thereby, a triangularshaped arm pivotally mounted between said platform and standard to swing in a horizontal plane, one arm of said triangle'havthereof, and a jack pivoted to the arm adjacent the recessed portion, whereby the jack whennot in use may be supported on the arm and positioned over the platform.

10. In a device of the class described, the combination with a truck platform, of a bracket pivoted thereon to swing in a horimounted on said member,

-ing a recessed portion adjacent the en d zontal plane and to extend upwardly over ranged, when not in use, to be supported on the edge of the platform, the end of the the bracket and above the pivotal connecbracket havin ears thereon, a head pivottion of said head. y `10 ally mounted 1n the earsto swing in a ver- In testimony whereof I hereunto afix my I tical plane, a jack rotatabl mounted With-` signature. 1

in the head, and adapte to engage the ground when in use, said jaek being ar- CLYDE E. COCHRAN.

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