Selective shutoff for repetitively operated valve

Details Selective shutoff for repetitively operated valve Selective shutoff for repetitively operated valve

1981-03-19

1982-10-12

Michalsky, Gerald A.

Fluid handling

Systems

Programmer or timer

74829, 74586, 13762412, 13762525, 271108, F16K 31524

Patent

active

043533930

ABSTRACT:
A vacuum system for operating a member, such as a signature gripper of a collator which must be actuated and released at regular intervals, conventionally has a slide-type valve which is constantly reciprocated by a cam-operated pushrod between an open position to connect the member to vacuum and a closed position to isolate the member from vacuum. To selectively disable and enable the gripper for selective feed of signatures, an air cylinder and piston unit is used as part of the pushrod so the length of the pushrod may be changed by retracting or extending the air cylinder piston. When the piston is retracted the valve is reciprocated between an open and a normal closed position; while extension of the piston causes the valve to be reciprocated between the normal closed position and a second closed position.

REFERENCES:
patent: 230470 (1880-07-01), Clerk
patent: 2948274 (1960-08-01), Wood
patent: 3875810 (1975-04-01), Paramonoff
patent: 3880418 (1975-04-01), Swanson
patent: 3965772 (1976-06-01), Hamisch, Sr.
patent: 4133332 (1979-01-01), Benson et al.

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