The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1992
Filed:
Jul. 11, 1990
Henri G Pierson, Tenerife, ES;
D & C Limited, Monrovia, LR;
Abstract
Batch filtration is carried out within a rockable/rotatable housing, suspension to be filtered being fed in via ports in the upper region onto a curved filter fixed within the housing, and filtrate draining from below, via outlets to which vacuum may be applied. The housing is preferably cylindrical and may be mounted upon rollers or wheels so that rocking or rotating can be effected by belts or chains attached between the housing and a linearly reciprocable member, or by a rotary gear or friction drive wheel acting on the housing circumference, or by rack and pinion means, or a variety of other means. Washing of filter cake, reslurrying, drying by hot gases, and pressurization can all take place 'in situ' whilst rocking continues, and discharge of cake is effected via the same ports as for inlet by turning the housing over.