Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1998-09-10
2000-07-25
Douglas, Steven O.
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
137112, 251 65, G05D 700, G05D 900
Patent
active
060925450
ABSTRACT:
A self actuating valve (10) including a housing (12) and a flow control member (14), and magnetic material (16, 17) integral with the housing (12) and the flow control member (14), respectively, with at least one of the magnetic material (16, 17) being permanently magnetized. The housing (12) includes a flow control chamber (18) and first, second, and third ports (20, 22, 24) connected to the chamber (18). The flow control member (14) is mounted in the chamber (18) for movement between first and second positions. In the first position, the member (14) blocks flow between the first and second ports (20, 22), blocks flow between the first and third ports (20, 24) and allows flow between the second and third ports (22, 24). In the second position, the member (14) allows flow between the first and second ports (20, 22) and blocks flow to the third port (24) from both the first port (20) and the second port (22). The magnetic material (16, 17) generates a magnetic force between the housing (12) and the flow control member (14) that is greater with the flow control member (14) in the first position than with the flow control member (14) in the second position.
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Bedore Daniel Blaine
Goldberg Gary Lester
Douglas Steven O.
Hamilton Sundstrand Corporation
Maust Timothy L.
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