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:
Jan. 16, 1990
Filed:
Apr. 14, 1988
Richard A Leoncavallo, Pittsford, NY (US);
Gregory R Phillips, Penfield, NY (US);
Nalge Cmpany, Rochester, NY (US);
Abstract
A filter assembly having a filter chamber. Filter means is disposed in the filter chamber which comprises at least one disc shaped filter assembly. The disc assembly has an upper support disc and a lower aligning support disc. A filter membrane is disposed on the top side of the support disc which has a plurality of primary grooves for receiving a liquid filter through the filter membrane. The aligning support disc fits substantially centrally on the bottom surface of the support disc and is provided with radially extending ribs which form radially extending grooves between. A second filter membrane is placed on the bottom surface of the support disc and overlaps a portion of the aligning disc. The bottom surface of the support disc is also provided with grooves for collection of a filtrate. Axial extending grooves are provided in the support disc for connecting the collection on the top surface with the bottom surface. The filtrate flows through the grooves between the support disc and aligning support disc to the outlet of the filter assembly.