Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1979-10-11
1981-04-14
Watson, Robert C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
81301, 7125, B23P 1904
Patent
active
042610907
ABSTRACT:
A pneumatic motor operates two pairs of fixed and movable jaws to open the hooks on tire cross chains for removal from the side chains and to close the hooks on new cross chains for applying to the side chains. An air hose connects to a vehicle air pressure system and is connected to an air line passing through a handle of the apparatus; a manual valve adjacent the handle controls the air supply to the motor.
REFERENCES:
patent: 2487281 (1949-11-01), Steckelberg
patent: 2566413 (1951-09-01), Hartman
patent: 3699595 (1972-10-01), Tofflemire
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