Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1997-09-22
1999-03-30
Bennett, Henry A.
Fluid handling
Line condition change responsive valves
Direct response valves
137527, F16K 1500
Patent
active
058876154
ABSTRACT:
A check valve using a valve element (2) which is so constructed that the valve element comprises three members: a cover (4); an annular packing (5) and a pressing plate (6), the pressing plate (6) is provided with a snap fit claw (7), a flexible flange (12) pressed to the peripheral edge of a valve seat (11) when the valve element (2) is put in the valve closing state is formed on the outer periphery of the annular packing (5), a peripheral stepped part (13) to which the outer periphery of the pressing plate (6) is fitted is formed on the inner periphery thereof, the cover (4) is provided with a fitting hole (8) for the snap fit claw (7) and a peripheral wall (14) formed on the outer periphery thereof, to which the main body part of the annular packing (5) except the flange (12) is fitted, the annular packing (5) is fitted to the cover (4), the pressing plate (6) is fitted to the annular packing (5), and the snap fit claw (7) is fitted in the fitting hole (8), thereby clamping the annular packing (5) with the cover (4) and the pressing plate (6), in which while the convenience of assembling is kept, the sealing performance in the valve closing state is improved.
REFERENCES:
patent: 2877790 (1959-03-01), Wilhelm et al.
patent: 5285816 (1994-02-01), Herlihy
patent: 5301709 (1994-04-01), Gasaway
patent: 5327933 (1994-07-01), Ishikawa et al.
patent: 5355910 (1994-10-01), Gies et al.
Goto Hiroshi
Ishikawa Tatuji
Koyama Toshihiro
Takisawa Masahide
Bennett Henry A.
Kim Joanne Y.
OM Corporation
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