Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1993-10-22
1995-09-19
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137501, G05D 706
Patent
active
054508738
ABSTRACT:
A regulator for maintaining a constant partial vacuum in a region, such as in a piece of process equipment or a fume hood. The regulator includes a path, through which fluid passes from the region to the vacuum source, and a movably mounted piston having a frontal face, which is exposed to fluid in the path, and a distal face, which is exposed to a reference pressure, such as the pressure of the environment in which the equipment is located. The piston is disposed in the path so that the piston may constrict the path at a constriction point. Fluid in the path upstream of the constriction point exerts a pressure on the frontal face of the piston that tends widen the path at the constriction point. The piston is mounted so that the weight of the piston exerts a force on the piston in a direction that tends to widen the path at the constriction point. A force is exerted on the piston, preferably by a spring under compression, in a direction that tends to narrow the path at the constriction point. A buffering gas, introduced to the area between the piston's skirt and the piston mounting structure, may be used to keep noxious fumes from backing up into the environment and/or to provide an efficient bearing.
REFERENCES:
patent: 1927972 (1933-09-01), Young
patent: 2592304 (1952-04-01), Lubeley
patent: 2803261 (1957-08-01), Carlson
patent: 2842159 (1958-07-01), Sprague
patent: 2868225 (1959-01-01), Wigham et al.
patent: 2899973 (1959-08-01), Carlson
patent: 2918933 (1959-12-01), Boitnott
patent: 3053272 (1962-09-01), Babson
patent: 3138174 (1964-06-01), Gilpin
patent: 3237616 (1966-01-01), Daigh
patent: 3312241 (1967-04-01), Bryant
patent: 3605788 (1971-09-01), Brown
patent: 3703913 (1972-11-01), Carsten
patent: 3741476 (1973-06-01), Travaglio
patent: 3742972 (1973-07-01), Hughes
patent: 3766933 (1973-10-01), Nicholson, Jr.
patent: 3806027 (1974-04-01), Ginn et al.
patent: 3820556 (1974-06-01), Millar et al.
patent: 3853143 (1974-12-01), DeLepeliere
patent: 3862644 (1975-01-01), Emmons et al.
patent: 3900045 (1975-08-01), Murrell
patent: 3978883 (1976-09-01), Petersen
patent: 3995656 (1976-12-01), Mills, Jr.
patent: 4039124 (1977-08-01), Ginn et al.
patent: 4092998 (1978-06-01), Taplin
patent: 4194526 (1980-03-01), Stromberg
patent: 4250914 (1981-02-01), Ferrentino
patent: 4250915 (1981-02-01), Rikuta
patent: 4428529 (1984-01-01), Bentsen
patent: 4431020 (1984-02-01), Kowalski
patent: 4508140 (1985-04-01), Harrison
patent: 4592385 (1986-06-01), Semon
patent: 4732190 (1988-03-01), Polselli
patent: 4739924 (1988-04-01), Kelley
patent: 4768543 (1988-09-01), Wienke et al.
patent: 4791956 (1988-12-01), Kominami et al.
patent: 4791957 (1988-12-01), Ross
patent: 4796660 (1989-01-01), Bron
patent: 4873873 (1989-10-01), Day
patent: 4942921 (1990-07-01), Haessig et al.
patent: 4979527 (1990-12-01), Mueller et al.
patent: 5000221 (1991-05-01), Palmer
patent: 5005636 (1991-04-01), Haessig
Amminger, W. L., "Computational Valve Analysis," Proceedings of the Second National Fluid Power System and Controls Conference (University of Wisconsin, May 21-23, 1975).
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