Valves and valve actuation – Reciprocating valve – Diaphragm
Reexamination Certificate
2005-02-15
2005-02-15
Look, Edward K. (Department: 3751)
Valves and valve actuation
Reciprocating valve
Diaphragm
C251S358000
Reexamination Certificate
active
06854713
ABSTRACT:
The diaphragm valve uses a metal dish-type diaphragm set to control the inflow and outflow of fluid. The metal dish-type diaphragm set is above an air flow channel to control the stem above the metal dish-type diaphragm set, and the air will be blocked by pressing the metal dish-type diaphragm to make it fit the metal valve base in the air flow channel; this non-metal valve base is fixed in the air flow channel by a fixed shrunk ring with a taper cross section, and the in-between metal diaphragm in the metal dish-type diaphragm set is annular in the center to reduce the metallic friction between metal diaphragms, to increase application times and to lower the leakage rate of the diaphragm valve.
REFERENCES:
patent: 4044793 (1977-08-01), Krueger et al.
patent: 4446886 (1984-05-01), Taylor et al.
patent: 4750709 (1988-06-01), Kolenc et al.
patent: 5108069 (1992-04-01), Tada et al.
patent: 5186434 (1993-02-01), Nishimura et al.
patent: 5335691 (1994-08-01), Kolenc
patent: 5485984 (1996-01-01), Itoi et al.
patent: 5730423 (1998-03-01), Wu et al.
patent: 6092550 (2000-07-01), Gotch et al.
Ho Jung-Chen
Lin Chun-Hung
Tsai Chen-Der
Wang Hann-Tsong
Wu Chin-Ching
Fristoe Jr. John K.
Industrial Technology Research Institute
Look Edward K.
Rabin & Berdo P.C.
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