Check valve and seating valve

Details Check valve and seating valve Check valve and seating valve

1998-08-07

1999-08-17

Ferensic, Denise L.

Fluid handling

Line condition change responsive valves

Direct response valves

13753311, 13753313, 251333, F16K 1500, F16K 100

Patent

active

059378964

ABSTRACT:
A check valve and a seating valve incur less deformation of a seat, providing good sealing performance. The check valve has: a holding space (36) which is provided in a fluid passage (8); a seating valve (41) which has a main body (41a) having a passage bore (41b) formed along the central axis thereof and a neck (41c) which is vertically provided along the outer peripheral portion of the passage bore (41b) on the end surface at one side of the main body (41a) and which has a seat (41d) formed at the distal end thereof, and which is arranged such that the end surface thereof at the opposite side from the neck (41c) comes into contact with a bottom surface (25a) of a recessed section (25); a valve element (32) which holds a seating surface against the seat (41d); an elastic member (33) which is provided in the holding space (36) in a compressed state to urge the valve element (32) toward the seat (41d); and a fixing member (31) which applies load to a shoulder (41e) of the main body (41a) along the central axis of the main body (41a) so as to secure the seating valve (41) to the bottom of the recessed section (25); wherein a thin wall portion (41g) is formed between the load point of the shoulder (41e) and the seat (41d).

REFERENCES:
patent: 2742054 (1956-04-01), Poundstone
patent: 3547399 (1970-12-01), Soderquist
patent: 5011116 (1991-04-01), Alberts et al.

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