Fastener driving device with trigger valve

Details Fastener driving device with trigger valve Fastener driving device with trigger valve

1997-12-05

1999-02-02

Smith, Scott A.

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

227 8, B25C 104

Patent

active

058653600

ABSTRACT:
An improved pneumatically operated fastener driving device comprising an actuating assembly mounted with respect to a housing assembly and movable from an inoperative position to an operative position. A first sealing element is mounted with respect to a feed path. The first sealing element moves from a sealed position, wherein it prevents communication between an air pressure reservoir and a control pressure chamber when the actuating assembly is in the operative position, and an unsealed position, wherein the first sealing element permits such communication to move a main valve to a closed position when the actuating assembly is in the inoperative position. A second sealing element is mounted with respect to an exhaust port and moves from a sealed position, wherein it prevents communication between the control pressure chamber and the atmosphere when the actuating assembly is in the inoperative position, and an unsealed position, wherein the second sealing element permits such communication, thereby affecting movement of the main valve to an open position, when the actuating assembly is in the operative position. A biasing element is operatively associated with the second sealing element and biases the second sealing element towards its unsealed position to maintain communication of the control pressure chamber with the atmosphere until the first sealing element has moved to its unsealed position.

REFERENCES:
patent: 3278103 (1966-10-01), Juilfs
patent: 3427928 (1969-02-01), Bade
patent: 3477629 (1969-11-01), Becht
patent: 3583496 (1971-06-01), Fehrs
patent: 4098295 (1978-07-01), Haytayan
patent: 4480528 (1984-11-01), Shiroyama
patent: 4915013 (1990-04-01), Moraht
patent: 5370037 (1994-12-01), Bauer
patent: 5628444 (1997-05-01), White
patent: 5669542 (1997-09-01), White

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