Metal deforming – By or with work-constrainer and/or manipulated work-forcer
Patent
1979-07-25
1981-09-15
Larson, Lowell A.
Metal deforming
By or with work-constrainer and/or manipulated work-forcer
72705, B21D 112
Patent
active
042890160
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. One end of each of the body frame pullers is pivotally mounted on a beam support mounted on the floor for movement from in front of the ramp to the side to align with a section of the frame or body to be worked on. A hook and chain fastened to the body or frame and to the body frame puller applies a straightening force on the body frame when the body frame puller is moved horizontally away from the automobile.
REFERENCES:
patent: 3222915 (1965-12-01), Swisher
patent: 3626747 (1971-12-01), Rouis
patent: 3631705 (1972-01-01), McCaffrey
patent: 3689030 (1972-09-01), Backus
patent: 3690712 (1972-09-01), Bahrman
patent: 4055061 (1977-10-01), Bayorgeon
patent: 4070899 (1978-01-01), Venalainen
Harper Horace S.
Larson Lowell A.
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