Dual component flap

Details Dual component flap Dual component flap

1993-10-13

1994-10-18

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

137855, F16K 1516

Patent

active

053559100

ABSTRACT:
A flap valve apparatus and an improved flap valve element which uses integrally bonded layers comprising a first soft flexible layer of an elastomer and a second layer of a rigid plastics material. The method of forming the flap valve element by a two component extrusion process is also disclosed.

REFERENCES:
patent: 441339 (1890-11-01), Swann
patent: 1438161 (1922-12-01), Zimmerman
patent: 3295547 (1967-01-01), Scaramucci
patent: 3347265 (1967-10-01), Groh
patent: 4064905 (1977-12-01), Nilsson
patent: 4304265 (1981-12-01), Sell
patent: 4449549 (1984-05-01), Weck
patent: 4567816 (1986-02-01), Kolt
patent: 4696263 (1987-09-01), Boyseen
patent: 4972765 (1990-11-01), Dixon
patent: 5105849 (1992-04-01), Clough
patent: 5194038 (1993-03-01), Klomhaus et al.

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