Liquid purification or separation – Structural installation – Closed circulating system
Patent
1995-11-29
1998-05-12
McCarthy, Neil
Liquid purification or separation
Structural installation
Closed circulating system
210232, 210237, 210406, 2104162, 220806, 220378, E04H 416
Patent
active
057500223
ABSTRACT:
A swimming pool debris removal system includes a recirculating pump and a vacuum chamber having an access port, an inlet port, and an outlet port connected to a suction inlet of the pump. The inlet port is connected to receive water and debris pumped from the pool. A removable vacuum seal lid is disposed in the access port, forming a vacuum seal therewith. An air bleed tube coupled to the outlet port draws air trapped between the lid and water in the chamber into the outlet port and suction inlet when the pump is operating, causing the trapped air to be replaced by water and thereby reducing momentum forces of water in the chamber against the lid as the pump is turned off. The lid includes a disk with a circumferential groove and a handle attached to an upper surface of the disk. A resilient seal ring co-molded with the disk is attached to the plastic disk and disposed around a circumferential portion of the disk, and includes a base portion that engages the circumferential portion and is partially disposed in the first circumferential groove. The resilient seal ring also includes an inclined flange portion that extends outward and upward from the circumferential portion to provide slidable, vacuum sealing engagement with the access opening.
REFERENCES:
patent: 3428209 (1969-02-01), Brucker et al.
patent: 3443264 (1969-05-01), Miller
patent: 3578202 (1971-05-01), Mainet
patent: 3909415 (1975-09-01), Young
patent: 4218967 (1980-08-01), Batchelor
patent: 4219423 (1980-08-01), Smith, Jr.
patent: 4718129 (1988-01-01), Miller
patent: 5449079 (1995-09-01), Yang
Blake Andy F.
Tarr William C.
Green Theodore M.
McCarthy Neil
Shasta Industries, Inc.
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