Abstract: An improved motor vehicle body and frame straightener of the type usable with conventional "dozers" to pull bodies and frames into shape and alignment, and having an adjustable anchor-free rectangular rail system with slidably positionable jacking provisions and laterally adjustable body grippers provides cross-slides integrally mounting the jacking provisions and laterally adjustable body grippers for better speed in set-up and better access for "dozers", while preserving facility to move the laterally adjustable body grippers without concurrent movement of the jacking provisions; grippers of two types, jaw and stud, may be interchanged by withdrawing a gripper arm and re-inserting it rotated 180.degree..

Abstract: A portable anchoring system forms a height-adjustable rectangular frame extending outwardly all around an automobile body to which holding devices adjustably mounted on it clamp, providing a self-anchoring base to which conventional "pull dozers" can be chained and apply pulling and pushing forces without need for floor anchorage; to assemble the frame, a pair of side assemblies movably supported in use-attitude on transfer-ball-equipped jack-bases provide adjustable clamps which extend inwardly for affixation to a vehicle body to be repaired, and after clamping are joined by two end rails; an adjustable cross-bar is provided for applying pushing and pulling forces beneath a vehicle body.

Abstract: An automobile body frame straightening apparatus is disclosed which includes a stationary elevated ramp to support the automobile at a desired working height, body gripping supports to attach to the undercarriage of the automobile to hold it in a fixed position, and body frame pullers for connecting to a section of the frame or body to be straightened. The body gripping supports connect to the ramp by horizontally reciprocating hydraulic cylinders and beam to move along the sides of the ramp for alignment with the undercarriage of the automobile. Each body gripping support is vertically telescopic and horizontally extendable to align with the undercarriage of the automobile. A ground mounted rail is positioned under the ramp such that a foot element extending from the body gripping support can engage the rail for stability and travel. The body frame pullers are hydraulically operated and move in both the horizontal and vertical directions.