Metal deforming – By or with work-constrainer and/or manipulated work-forcer
Patent
1979-03-12
1981-04-28
Larson, Lowell A.
Metal deforming
By or with work-constrainer and/or manipulated work-forcer
72705, B21D 112
Patent
active
042638020
ABSTRACT:
Locking apparatus is disclosed in its preferred form for use in an apparatus for repairing and straightening the body and frame of a vehicle having force applying members pivotally interconnected to a tread member by connector arms. Regular shaped apertures extend vertically through the tread member. The preferred apparatus of the present invention includes an upraised channel formed on the connector arm of the force applying member and a locking pin including a body portion having a cross section of a regular shape corresponding to the apertures formed in the tread member, an inverted U-shaped handle extending beyond the circumference of the body portion to prevent the body portion from falling through the apertures of the tread member, and a square portion located on the bottommost portion of the body portion. The square portion has a diagonal which is less than or equal to the diameter of the body portion such that the locking pin can be inserted into and passed through the apertures of the tread member to position the square portion within the U-shaped inside surface or to abut with the outside surfaces of the channel member.
REFERENCES:
patent: 3626747 (1971-12-01), Rouis
patent: 3776021 (1973-12-01), Lionello
patent: 3888100 (1975-06-01), Chisum
patent: 3927550 (1975-12-01), Samuelsson
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