Pulling apparatus and method

Details Pulling apparatus and method Pulling apparatus and method

1977-04-11

1980-02-12

Larson, Lowell A.

Metal deforming

With stopping upon completion of prescribed operation

Metal deforming by use of roller or roller-like tool element

2924352, 7245316, 91 47, 173169, B21D 3908

Patent

active

041877080

ABSTRACT:
A hand-tool housing a pneumatic and a hydraulic piston joined together with a common piston rod, and separated into an air chamber and a hydraulic chamber by a stationary divider through which the piston rod is sealed for free movement is used as a pulling device. Compressed air moves the puller to a starting position, and an air powered hydraulic unit supplies hydraulic pressure to effect the pulling cycle. Sequencing of the complete pulling cycle is controlled by a trigger actuated air valve mounted in the hand tool.

REFERENCES:
patent: 3367166 (1968-02-01), Newton
patent: 3523441 (1970-08-01), Bell
patent: 3875649 (1975-04-01), King
patent: 3892121 (1975-07-01), Champoux
patent: 3902405 (1975-09-01), Costarella
patent: 3994208 (1976-11-01), Boyer
patent: 4005598 (1977-02-01), Ehmann
patent: 4010630 (1977-03-01), Davis

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