Work holders – With fluid means – Plural positioning means sequentially operated
Patent
1987-11-24
1989-01-24
Laroche, Eugene R.
Work holders
With fluid means
Plural positioning means sequentially operated
269 27, B23Q 308
Patent
active
047996579
ABSTRACT:
A powered work clamping device including a housing with an upper and lower chamber and an intermediate chamber communicating with the upper and lower chambers, an upper and lower piston respectively residing in the upper and lower chambers, and wherein the lower piston has a section with reduced diameter slidably and rotatably operating in the intermediate chamber, an index rod projects from the lower piston into an index bore in the upper piston and a piston rod connected thereto. The piston rod projects from the housing and is secured to a work-engaging head. The head is rotatable and independently extendable depending upon operation of the upper and lower pistons and means for rotating the lower piston and actuated upon operation of a check valve served by one of two independently actuated two-stage directional control valves.
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patent: 3948502 (1976-04-01), Waller et al.
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patent: 4560152 (1985-12-01), Miller
Applied Power Inc.
Cooper, III John C.
LaRoche Eugene R.
Pascal Robert J.
Sylke C. Thomas
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