Poppet valve with improved seal for pneumatic fastener driving a

Details Poppet valve with improved seal for pneumatic fastener driving a Poppet valve with improved seal for pneumatic fastener driving a

1986-10-20

1988-08-16

Rivell, John

Motors: expansible chamber type

With motive fluid valve

Pilot valve

277130, 251357, 251900, F15B 13042, F16K 146

Patent

active

047635622

ABSTRACT:
A poppet valve having novel seal means for use in a pneumatic fastener apparatus of the kind having a cylinder, a piston slidably mounted for reciprocal movement in the cylinder, a fastener-driving hammer attached to the cylinder, and means including the poppet valve for controlling the application of pressurized air to the piston so as to cause it to execute a work stroke. The seal means comprises an O-ring disposed in a circumferentially-extending groove formed in the outer surface of the poppet valve member and arranged to make a sealing engagement with an end edge surface of the cylinder. More than half of the cross-sectional area of the O-ring is disposed within the groove so that as the poppet valve is driven into closing relation with the cylinder, the O-ring seal is clamped between an annular circumferentially-extending surface of the poppet valve member and the annular end edge surface of the cylinder, thereby providing a secure seal along the full perimeter of the cylinder.

REFERENCES:
patent: 2696361 (1954-12-01), Jensen
patent: 2827922 (1958-03-01), Guinard
patent: 3135332 (1964-06-01), Merdinyan
patent: 3601300 (1971-08-01), Anstett
patent: 3711008 (1973-01-01), Clifford et al.
patent: 3731905 (1973-05-01), Piet
patent: 4098171 (1978-07-01), Haytayan
patent: 4319706 (1982-03-01), Halstead
patent: 4480528 (1984-11-01), Shiroyama

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