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:
Aug. 17, 2004
Filed:
Mar. 14, 2002
Gerhard Rinninger, Pforzen, DE;
Oswald Seibold, Munich, DE;
ASF Thomas Industries GmbH, Puchheim, DE;
Abstract
A membrane pump ( ) having a membrane ( ) which can be actuated by a crank drive ( ), which membrane bounds, together with a concave pump body surface ( ), a pump chamber ( ), an inlet channel ( ) and an outlet channel ( ) which open out at an inlet opening ( ) and an outlet opening ( ) in the pump body surface ( ), the membrane ( ) having a membrane core ( ) and an elastically deformable membrane ring ( ) and the membrane core ( ) having a convex surface adapted to the pump body surface ( ). The inlet opening ( ) is arranged in the region of the pump body surface ( ) which the membrane ( ) first approaches upon an expulsion stroke of the crank drive ( ), and the elastically deformable membrane ring ( ) closes the inlet opening ( ) before the attainment of top dead center of the crank drive ( ).