Pressure screen

Liquid purification or separation – Processes – Including controlling process in response to a sensed condition

Patent

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Details

209273, 209281, 210112, 210147, 210162, 210170, 210241, 210295, 210320, 210454, C02F 100

Patent

active

051416506

ABSTRACT:
A portable pressure screen apparatus is disclosed having a cylindrical shaped pressure housing defining upper and lower hingedly connected halves. The housing includes a slurry inlet aperture raised relative to a filtered slurry discharge port situated at the opposite end of the pressure housing from the slurry inlet aperture. A screen spans the interior of the housing, separating the interior into an upper chamber and a lower chamber. Collected particulate matter from the slurry inlet aperture is accumulated in the upper chamber and slurry filtered through the screen leaves the interior of the housing through the filtered slurry discharge port connected to the lower chamber. A support frame is employed to adjustably support the housing in a generally angled attitude relative to the horizontal. Angling the housing at an acute angle with respect to the horizontal causes the unfiltered slurry to be exposed to the entire length of the screen causing particulate matter larger than the opening in the screen to be accumulated in the upper chamber above the screen and drawn down the screen toward a particulate matter discharge port by gravity. The particulate matter discharge port is selectively openable or closable during operation of the device in response to the sensed pressure differential between the upper and lower chambers caused by accumulated particulate matter too large to pass through the screen.

REFERENCES:
patent: 1525449 (1925-02-01), Johnson
patent: 3256995 (1966-06-01), Schmid et al.
patent: 4043919 (1977-08-01), Hutzler
patent: 4220540 (1980-09-01), Hagihara
patent: 4250034 (1981-02-01), Wolters
patent: 4605497 (1986-08-01), Araoka et al.
patent: 4626349 (1986-12-01), Uphus
patent: 4692253 (1987-09-01), Otake et al.
patent: 4744896 (1988-05-01), James et al.

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