Metal deforming – By or with work-constrainer and/or manipulated work-forcer – Comprising work-stopping abutment
Patent
1979-08-03
1981-08-11
Larson, Lowell A.
Metal deforming
By or with work-constrainer and/or manipulated work-forcer
Comprising work-stopping abutment
72705, B21D 112, B21D 114
Patent
active
042827400
ABSTRACT:
Height extender for use in an apparatus for repairing and straightening is disclosed in its preferred form for use in connection with apparatus for repairing and straightening the body and frame of a vehicle, most preferably a high ground clearance vehicle. The apparatus for repairing and straightening includes a tread member allowing placement of the vehicle thereon and having a plurality of apertures passing vertically therethrough. Bolsters, well known in the prior art, are removably held in the tread apertures by a locking member. The height extender includes a sleeve member, a plate attached to the sleeve member having an abutting portion and an elongated bar portion, and first and second bracing members attached to the elongated bar portion and the sleeve member. The sleeve member is received and slidable on the bolster. The height extender can then be positioned on the bolster at multilevel positions by a pin which passes through apertures formed in the bracing members. The elongated bar portion is spaced from the bolster when the bolster is located within the sleeve member, and the elongated bar portion does not contact the bolster when a counterforce is transferred to the bolster by the height extender, as insured by the bracing members, such that the counterforce is only transferred to the bolster by the sleeve member at a position adjacent to the tread member and not transferred to the bolster by the plate or bracing members to avoid an undue amount of cantilever type counterforce into the tread member or the bolster.
REFERENCES:
patent: 1889187 (1932-11-01), Wochner
patent: 2140686 (1938-12-01), Bennett
patent: 2563527 (1951-08-01), Gingrich et al.
patent: 2692002 (1954-10-01), Merrill et al.
patent: 3276237 (1966-10-01), Transue
patent: 3377834 (1968-04-01), Latuff et al.
patent: 4151737 (1979-05-01), Specktor
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