Liquid purification or separation – With repair or assembling means – Sliding or rolling on guide means
Patent
1981-04-24
1984-09-18
Spear, Frank
Liquid purification or separation
With repair or assembling means
Sliding or rolling on guide means
210361, B01D 3322
Patent
active
044722761
ABSTRACT:
The filter assembly for swinging bucket type centrifuges includes a cylindrical filter body disposed within a filter body holder, both having hemispherical outer ends. The diameter of curvature of the filter body is smaller than the diameter of curvature of the holder allowing the contact surface between the holder and the body to be in the shape of a ring; centrifugal forces thus result in compression of the filter body thereby preventing cracking. The filter's crenelated shape is provided through use of a plunger to apply force to the filter against the crenelated filter membrane forming member. The filter assembly also may have a chamber and a meniscus equalizing pore around the filter holder. The chamber and appropriately positioned pore prevent fluid from rising during centrifugation and contaminating the particulate. A method for installation includes providing a filter body with an open inner end and a rounded outer end, placing a filter plate in one recess therein and a filter membrane in the other recess therein and applying force to provide the membrane with a crenelated shape. Another method includes the additional step of positioning an insert within the body to form a fluid retaining cavity and a meniscus equalizing pore.
REFERENCES:
patent: 1150910 (1915-08-01), Warmington
patent: 2291427 (1942-07-01), Wolcott
patent: 2854143 (1958-09-01), Novak
patent: 3583627 (1971-06-01), Wilson
patent: 4127131 (1978-11-01), Vaillancourt
patent: 4221670 (1980-09-01), Ziemek
Spear Frank
The Regents of the University of California
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