05297915 is referenced by 9 patents and cites 13 patents.

A jack for lifting and moving heavy truck parts, such as clutch assemblies and fly wheels. A hydraulic cylinder assembly is mounted on a wheeled frame for pivotal movement through an arc of greater than 90 degrees so that an object secured to the end of the rod of the cylinder can be moved from a horizontal position, where it rests low in the frame, to a vertical position tilted slightly forward for easy placement or removal of the object under the truck. When the cylinder is in the vertical position and the rod is slightly extended, the object may be rotated in a horizontal plane which assists in positioning the object under the truck. Yet, means is included for limiting the range of such rotation when the rod is completely retracted so that while the object is being lifted up or down it will not swing around the rod and fall off of the apparatus. While secured to the end of the rod of the first cylinder, the object may be rotated in a plane parallel to the axis of the rod. This further assists in positioning the object under the truck. A second hydraulic cylinder is employed to drive the pivotal movement of the first cylinder. In this way, the first cylinder may be selectively positioned at any point throughout the range of rotation.

Title
Apparatus for lifting and moving heavy objects
Application Number
7/790942
Publication Number
5297915
Application Date
November 12, 1991
Publication Date
March 29, 1994
Inventor
Francis L Bach
P.O. Box 40, Custer City, 73639
OK, US
Agent
Dunlap Codding & Lee
IPC
B66F 5/04
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