Compressed air-operated fastener driver

Details Compressed air-operated fastener driver Compressed air-operated fastener driver

1976-11-18

1978-10-03

Schwadron, Martin P.

Motors: expansible chamber type

With motive fluid valve

Pilot valve

227130, 1376256, F15B 13042, B25C 104

Patent

active

041177673

ABSTRACT:
The invention pertains to a compressed air-operated fastener driver utilizing a piston reciprocally mounted within a cylinder wherein a control valve at one end of the cylinder selectively opens and closes cylinder ports communicating with a compressed air source, and the control valve utilizes an exhaust passage and abutment cooperating with an exhaust valve controlling the flow through exhaust ports. The control valve positions the exhaust valve, and differential pressure areas defined on the exhaust valve assure closing of the exhaust ports during pressurization of the chamber during the working stroke reducing noise and an efficient utilization of compressed air.

REFERENCES:
patent: 3815475 (1974-06-01), Howard et al.
patent: 3871566 (1975-03-01), Elliesen et al.

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