Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Patent
1978-11-27
1980-12-30
Maslousky, Paul E.
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
91400, 91451, 92162R, 277 3, 277 27, F01B 3100, F15B 13042
Patent
active
042416442
ABSTRACT:
A pneumatic actuator in which a piston and a cylinder define an annular gap therebetween axially connecting two portions of the cylinder cavity otherwise separated by the piston. When compressed air is admitted to one of the cavity portions, an O-ring in an annular groove of the cylinder wall is expanded by the compressed air and seals the gap, and the piston is moved against the restraint of a strong compression spring. When the air backing the O-ring is vented, the air pressure in the cylinder drives the O-ring back into the groove, and air thereafter escapes quickly from the one portion of the cavity through the gap and into the other cavity portion which is open to the atmosphere. The resulting quick movement of the piston by the expanding compression spring is transmitted to a device outside the cylinder for operating the same.
REFERENCES:
patent: 1062749 (1913-05-01), Townsend
patent: 2426613 (1947-09-01), Jackson
patent: 2624320 (1953-01-01), Williams
patent: 3315968 (1967-04-01), Hanlon
patent: 3572211 (1969-01-01), Doyle
Maslousky Paul E.
Vat Aktiengesellschaft fuer Vakuum-Apparate Technik
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