Metal seals for check valves

Details Metal seals for check valves Metal seals for check valves

1998-06-02

1999-04-13

Bennett, Henry

Fluid handling

Line condition change responsive valves

Direct response valves

13751629, 251359, F16K 1500, F16K 3100

Patent

active

058933891

ABSTRACT:
A poppet check valve (20) in the embodiment of FIG. 1 has a valve body (30) with a fixed unyielding metal seat (38) for engaging in metal-to-metal sealing contact with a sealing surface (48) on poppet valve member (34) at relatively high fluid pressure ranges. The metal seats 38 and 48 may both be frusto-conical in shape or one frusto-conical and the other spherical. A compliant metal sealing member (42) engages sealing surface (48) in metal-to-metal sealing relation at low fluid pressures prior to engagement of sealing surface (48) with fixed metal seat (38) at high fluid pressures. Alternative embodiments are shown in FIGS. 3-7. The embodiment of FIG. 7 shows a poppet check valve with a pair of staged flexible metal sealing members (42D, 43D) which are integral with body (30D) for progressively engaging the sealing surface (48D) of poppet valve member (34D) prior to engagement of fixed metal seat (38D).

REFERENCES:
patent: 2481713 (1949-09-01), Bertea
patent: 2900999 (1959-08-01), Courtot
patent: 3054422 (1962-09-01), Napolitano
patent: 4113268 (1978-09-01), Simmons et al.
patent: 4532958 (1985-08-01), Napolitano
patent: 4821954 (1989-04-01), Bowder

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