Pressure valve

Details Pressure valve Pressure valve

2007-04-24

2007-04-24

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S471000, C137S493800

Reexamination Certificate

active

10477353

ABSTRACT:
The invention relates to a pressure valve with a flow passage (3) having a valve body (14) and a lifting plate (21) that has a surface area A2transversally of the flow passage (3) that exceeds the cross sectional area A1of the flow passage (3) at the valve seat (13) of the valve body, said pressure valve being configured such that, at any time, the container is in communication with the area above the lifting plate (21). The invention is characterised in that the pressure valve also comprises a magnet (8) and a magnetisable body (9); and that the force of attraction Fmbetween the magnet (8) and the magnetisable body (9) and the mass of the lifting plate (21) contributes to defining the abutment force Fc, of the valve body (14) against the valve seat (13) in the closed state of the pressure valve.

REFERENCES:
patent: 2367260 (1945-01-01), Beddoes
patent: 2700395 (1955-01-01), Young
patent: 3454040 (1969-07-01), Dunkelis
patent: 4091837 (1978-05-01), Edmunds et al.
patent: 5050639 (1991-09-01), Sorensen
patent: 5060688 (1991-10-01), Sorensen
patent: 5607001 (1997-03-01), Petersen
patent: 5873384 (1999-02-01), Pedersen et al.
patent: 6029706 (2000-02-01), Joo, II
patent: 6585000 (2003-07-01), Radford
patent: 5140623 (1976-04-01), None
patent: 196582 (1989-06-01), None
patent: 9601962 (1996-01-01), None
English Abstract of JP1-96582.
English Abstract of JP51-40623.

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