Device for separating a surface layer of a liquid

Details Device for separating a surface layer of a liquid Device for separating a surface layer of a liquid

2005-06-14

2005-06-14

Upton, Christopher (Department: 1724)

Liquid purification or separation

Processes

Separating

C210S122000, C210S242300, C210S540000

Reexamination Certificate

active

06905611

ABSTRACT:
The invention refers to a device for separating a surface layer of a liquid by a container submerged in the liquid. The container includes a bottom, a wall member, connected to the bottom and having a variable length, and a separating member, which is connected to the wall member and communicates with a space in the container via an opening. An overflow portion of the separating member is located below a free liquid surface of the surface layer and permits the flowing of liquid. A discharge conduit extends from the space for liquid discharge. A floating member, connected to the separating member, floats on the liquid outside the container and exerts a lifting force upon the separating member in a direction prolonging the wall member. A submerging member is connected to the separating member and located below the over flow portion. The submerging member has a mass and exerts a downwardly directed force, so that the overflow portion is located below the free liquid surface, and a lifting force due to liquid pressure when the space has been filled with such a quantity of liquid that the submerging member partly is located in the liquid, wherein the overflow portion will be above the free liquid surface.

REFERENCES:
patent: 3303932 (1967-02-01), Hirs et al.
patent: 3395803 (1968-08-01), Sumimoto et al.
patent: 3633749 (1972-01-01), Panosh
patent: 3782553 (1974-01-01), Brekke
patent: 4032444 (1977-06-01), Wright et al.
patent: 5059312 (1991-10-01), Galletti
patent: 5693218 (1997-12-01), Yamamoto et al.
patent: 6159362 (2000-12-01), Gilmore
patent: 6224753 (2001-05-01), Marbach
patent: WO 97/30821 (1997-08-01), None

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