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:
May. 21, 1991
Filed:
Apr. 09, 1990
Edward J Arkans, Sun Valley, CA (US);
Other;
Abstract
A combined and integral pump and check valve combination is disclosed herein for the control of fluid flow through a fluid pump portion having an inlet port leading to a gland cavity occupied by a movable sealing element yieldably held in position closing or sealing the inlet port by a self-biasing member such as an open-cell foam material. A retaining ring used during the assembly procedure is disposed between the edge marginal regions of the self-biasing member and the movable sealing element which may function to stabilize the element. A sealed retaining plate is attached to the pump supporting the self-biasing member and the movable element combination and further defines an outlet port or duct on the side of the movable element opposite to its side which is adjacent to the inlet port.