Baths – closets – sinks – and spittoons – Strainer – stopper – plug or closure – Closure
Patent
1978-06-30
1979-10-09
Artis, Henry K.
Baths, closets, sinks, and spittoons
Strainer, stopper, plug or closure
Closure
4172, 417217, 4286, 4292, A47K 114
Patent
active
041700473
ABSTRACT:
A protective cover for swimming pools drains and the like. The cover is of a unitary construction and is preferably injection-molded from a flexible, tough, spring-like plastic. The cover includes an outer, annular rim designed to rest on a sub-main drain or the like. The main cover has no holes and features a generally sine wave or bellows spring design. The central portion is inwardly or downwardly curved, and forms a portion of a sphere having its center on a line normal to a plane passing through the main cover. The central portion is surrounded by another inwardly curved portion which preferably is provided on its underside with a circular projection extending normal to the plane of the cover to lend it mechanical rigidity. The outer main cover portion is upwardly curved and is connected to the ring portion through a plurality of stanchions in the form of vanes extending in radial directions. Due to its spring-like construction, the cover will spring back under loads within elastic limits of the material and even limited overloads causing a permanent set will not cause the cover to lose its full function.
REFERENCES:
patent: 2316724 (1943-04-01), Sperry
patent: 3343774 (1967-09-01), Pryor
patent: 3392844 (1968-07-01), Decarie
patent: 4115878 (1978-09-01), Johnson et al.
Corsette Douglas F.
Jedlick Frank J.
Artis Henry K.
Bissell Henry M.
LandOfFree
Vaned anti-vortex pool drain cover does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vaned anti-vortex pool drain cover, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vaned anti-vortex pool drain cover will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1961057