Underpressure valve

Fluid handling – Line condition change responsive valves – Direct response valves

Reexamination Certificate

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Details

C137S512150, C137S515500, C137S510000, C137S907000

Reexamination Certificate

active

06945277

ABSTRACT:
The invention concerns an underpressure valve with a multi-part housing and a disc-like closing body which has at least one opening, and with an opening-free section disposed in alignment with the flow channel of the housing.

REFERENCES:
patent: 3465786 (1969-09-01), Spisak
patent: 3633605 (1972-01-01), Smith
patent: 5025829 (1991-06-01), Edwards et al.
patent: 5727594 (1998-03-01), Choksi
patent: 6089272 (2000-07-01), Brand et al.
patent: 6240962 (2001-06-01), Tai et al.
patent: 29 42 876 (1980-05-01), None
patent: 35 31 010 (1987-02-01), None
patent: 88 15 392 (1989-05-01), None
patent: 40 07 427 (1990-10-01), None
patent: 44 46 170 (1996-06-01), None
patent: 198 14 262 (1999-10-01), None
patent: 198 54 540 (2000-06-01), None
patent: WO 93/01433 (1993-01-01), None

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