Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve
Patent
1990-09-26
1991-06-04
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Assembling, disassembling, or removing cartridge type valve
137448, 137451, 13762528, 251175, 251294, 251299, 251901, 405 37, 405 39, 405 96, F16K 4300, F16K 3120, F16K 3300
Patent
active
050205676
ABSTRACT:
A valve is installed into an underground conduit to control drainage of water through that conduit. The drainage control valve includes a perforated plate across the conduit. The latter plate is formed with a peripheral groove rectangular in cross section and a hollow tube made of flexible material is inserted into this groove to seal the joint between the plate and the inner surface of the conduit. A flap also made of flexible material is applied against the upstream surface of the plate and is formed with a peripheral edge taper whereby pressure applied on the flap by water upstream of the drainage valve forces the edge taper against the upstream plate surface to form a sealed joint between these flap and plate. The upper portion of the flap is attached to the upper portion of the plate through screw and nut assemblies. These assemblies traverse rigid washers inserted in respective holes made in the flap. The flap is slightly thicker than the washers for preventing excessive crushing of the flexible material upon tightening of the screw and nut assemblies while ensuring water imperviousness. An elongated member integral with the flap has a free end formed with a hole to attach a cord enabling lifting of the lower portion of the flap to thereby drain water through the perforated plate.
REFERENCES:
patent: 297643 (1884-04-01), Stark
patent: 2180173 (1939-11-01), Share
patent: 2216000 (1940-09-01), Crawford
patent: 2675025 (1954-04-01), Wynkoop
patent: 3259142 (1966-07-01), Richards
patent: 3951168 (1976-04-01), Roberts
patent: 3998571 (1976-12-01), Falke
patent: 4084617 (1978-04-01), Happe
patent: 4111228 (1978-09-01), Simionescu
patent: 4147183 (1979-04-01), Kalsi
patent: 4621945 (1986-11-01), Schafer et al.
Innotag Inc.
Longacre James R.
Walton George L.
White John M.
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