Passive valve assembly

Details Passive valve assembly Passive valve assembly

2005-04-26

2005-04-26

Look, Edward K. (Department: 3751)

Valves and valve actuation

Fluid actuated or retarded

Dashpot or fluid controlled retarder or timer

C123S090120

Reexamination Certificate

active

06883775

ABSTRACT:
A passive valve assembly for controlling the flow into or out of chamber (3) through a port (4). The valve assembly comprises a valve element (5) arranged to open in the direction of flow through the port. The valve element (5) has a piston (9) which is reciprocable in a cylinder (10) containing gas. On opening of the valve, gas is compressed in a first chamber (11) of the cylinder (10), and this energy of compression is used to reverse the direction of the valve element (5) and return it to its seat.

REFERENCES:
patent: 1486567 (1924-03-01), Deacon
patent: 1494834 (1924-05-01), Hack
patent: 3114532 (1963-12-01), Gray et al.
patent: 5259345 (1993-11-01), Richeson
patent: 5988124 (1999-11-01), Duesmann
patent: 1 042 607 (1956-01-01), None
patent: 0 791 728 (1997-08-01), None
patent: 2 102 065 (1983-01-01), None

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