Low pressure check valve

Details Low pressure check valve Low pressure check valve

2006-11-21

2006-11-21

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S527000, C137S859000, C251S331000, C118S715000

Reexamination Certificate

active

07137405

ABSTRACT:
A check valve for preventing backflow of media including a valve movably coupled to a carrier body, the valve including a flexible membrane disposed therein such that the flexible membrane flexibly engages an aperture in the carrier body to prevent backflow of media through the aperture.

REFERENCES:
patent: 73038 (1868-01-01), Pollard
patent: 2526019 (1950-10-01), Fowler
patent: 2881795 (1959-04-01), Waldenmaier et al.
patent: 3075547 (1963-01-01), Scaramucci
patent: 4502503 (1985-03-01), Karpenko
patent: 4867200 (1989-09-01), Markley
patent: 5060689 (1991-10-01), Csaszar et al.
patent: 5390895 (1995-02-01), Iwabuchi
patent: 5904338 (1999-05-01), Unruh et al.
patent: 6019116 (2000-02-01), Schell
patent: 6397874 (2002-06-01), Featheringill et al.

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