System for cleaning the interior surface area of a vessel

Baths – closets – sinks – and spittoons – Pool type – With cleaning means

Patent

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Details

134167R, 137238, E04H 320

Patent

active

043172431

ABSTRACT:
This invention provides a valve by means of which a major portion of the suction flow of a swimming pool filtration system is channeled through an automatic cleaning device which cleans the floor and/or wall of a swimming pool, and a minor portion of the suction flow is drawn from the surface of the pool thereby to skim the surface. The valve has a main inlet opening connectable to the device, an outlet opening connectable to the filtration system and an auxiliary opening which is closed to some extent by a closure member to normally provide a restricted aperture through which the water drawn from the surface flows. The closure member is biassed closed by a spring located in a variable volume chamber which communicates with the interior of the valve between the auxiliary opening and the main inlet opening. When the restricted aperture is blocked by leaves or the like, the pressure in the chamber decreases, compressing the spring and allowing the closure member to open. The leaves or the like then pass through and the closure member closes again.

REFERENCES:
patent: 1541540 (1925-06-01), Weir
patent: 2252962 (1941-08-01), Carlson
patent: 4129904 (1978-12-01), Pansini
patent: 4169484 (1979-10-01), Bonigut et al.
patent: 4228553 (1980-10-01), Genuit

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