Minor-amount release valve for a hand air pump

Details Minor-amount release valve for a hand air pump Minor-amount release valve for a hand air pump

1999-02-09

2000-06-06

Rivell, John

Valves and valve actuation

Reciprocating valve

Push or pull operator

251339, 251900, F16K 144, F16K 1520

Patent

active

060708557

ABSTRACT:
A minor-amount release valve includes a valve seat having a first end mounted in a receptacle communicated with an air chamber. The valve seat includes a through hole for communicating the receptacle with atmosphere. The first end of the valve seat includes an end face having a recessed section around the through hole. A stem is slidably extended through the through hole of the valve seat in a manner that an air passage is defined between the receptacle and atmosphere. The stem includes a first end located in the receptacle and a second end for manual operation. The first end of the stem includes a flange formed thereon, the stem further including a transverse hole that communicates with the air passage. A seal ring is positioned in the recessed section of the first end of the valve seat and has a width smaller than a diameter of the transverse hole. The seal ring blocks the air passage when the transverse hole of the stem is not aligned with the seal ring, and air in the air chamber is released to atmosphere when the transverse hole is aligned with the seal ring. An elastic member is attached between the flange and an end wall that defines a portion of the receptacle. The elastic member biases the stem to a sealing position in which the transverse hole of the stem is not aligned with the seal ring.

REFERENCES:
patent: 904329 (1908-11-01), Hohman
patent: 2577654 (1951-12-01), Gates
patent: 3008686 (1961-11-01), Becker
patent: 3239192 (1966-03-01), Totten
patent: 5054514 (1991-10-01), Marin
patent: 5390899 (1995-02-01), Perez
patent: 5665908 (1997-09-01), Burkey et al.

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