Fluid handling – Self-proportioning or correlating systems – Self-proportioning flow systems
Patent
1998-08-25
1999-11-02
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Self-proportioning flow systems
137315, G05D 1103
Patent
active
059751070
ABSTRACT:
A balancing valve has a housing formed with a pair of inlet ports and a pair of coaxial tubes having outer ends seated in the housing at the ports and opposite confronting and axially closed inner ends. The tubes are each formed with a radially throughgoing aperture and a flexible membrane has a center sealingly engaged between and fixed to the inner ends and an outer periphery seated in the housing and defines a respective compartment around each of the tubes. A pair of like sleeves coaxially surrounding the tubes each have an inner end fixed to the membrane offset from the center and from the outer periphery and an outer end. Formations on the outer ends of the sleeves and on the tubes form annular valve openings of flow cross sections dependent on an axial position of the sleeves relative to the tubes. The compartments communicate via the respective valve openings and apertures with the respective inlets so that, when pressure at one of the ports exceeds pressure at the other port, the sleeves will be moved axially by deforming the membrane to increase the flow cross section of the valve associated with the other port and decrease the flow cross section of the valve associated with the one port.
REFERENCES:
patent: 2145114 (1939-01-01), Gibbs et al.
patent: 3688790 (1972-09-01), Esten
patent: 3724480 (1973-04-01), Povalski et al.
patent: 4022242 (1977-05-01), Turecek
patent: 5425394 (1995-06-01), Clare
patent: 5664598 (1997-09-01), Shieh
patent: 5732729 (1998-03-01), Shieh
Brock Gunter Uwe
Cruickshank Richard
Pinder Shane
Bastianelli John
Dubno Herbert
Friedrich Grohe AG
Hepperle Stephen M.
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