Fluid handling – With liquid valves or liquid trap seals – Seal for relatively movable valving parts
Patent
1997-11-13
2000-05-02
Rivell, John
Fluid handling
With liquid valves or liquid trap seals
Seal for relatively movable valving parts
13724725, 1374938, 137559, F16K 1310, F16K 1726
Patent
active
060560053
ABSTRACT:
A vent valve is provided wherein a pallet/diaphragm type valve is cooperatively and coactively associated with a pressure responsive liquid seal. The assembly eliminates low level fugitive vapor emissions escaping from the diaphragm/seat region up to a predeterminable liquid seal set pressure which preferably is less than or equal to the set pressure for diaphragm opening. A liquid reservoir with a sealed chamber is provided for the liquid seal subassembly. Fugitive emissions from a tank or the like that is associated with the vent valve enter the sealed chamber and are there contained until the pressure therein is sufficient to displace the sealing liquid to an extent sufficient to open the sealed chamber. The valve assembly can be used as a pressure vent, as a vacuum vent, and as a combination pressure and vacuum vent. Optional features, such as a constant liquid level controller, a sight glass, a signaling device, or the like can be provided.
REFERENCES:
patent: 266485 (1882-10-01), Lightbody
patent: 618913 (1899-02-01), Smith
patent: 1102549 (1914-07-01), Rumpf
patent: 1529818 (1925-03-01), Tuttle
patent: 1589026 (1926-06-01), Wilson
patent: 1651051 (1927-11-01), Wiggins
patent: 2367158 (1945-01-01), Ulm
patent: 2384147 (1945-09-01), Wiggins
patent: 2413804 (1947-01-01), Ulm
patent: 2527892 (1950-10-01), Quist
patent: 2575574 (1951-11-01), Withrow et al.
patent: 2704088 (1955-03-01), Nerem
patent: 2929335 (1960-03-01), Seiler
patent: 3394732 (1968-07-01), Lisciani
patent: 4326556 (1982-04-01), Deutsch et al.
patent: 4502500 (1985-03-01), Upton
patent: 4724857 (1988-02-01), Taylor
patent: 4773441 (1988-09-01), Biba
patent: 4787409 (1988-11-01), Taylor
patent: 4977918 (1990-12-01), Taylor
patent: 5116089 (1992-05-01), Taylor
patent: 5273065 (1993-12-01), Taylor
Clift Martin
Liu Baohai
Piotrowski Thomas C.
Rivell John
The Protectoseal Company
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