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:
Jun. 30, 1981
Filed:
Dec. 31, 1979
Roger A Dugas, Chester, NH (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A direction control flush valve is described in which a hollow cylindrical valve stem that is mounted for rotation within a cylindrical cavity in a valve body is provided with a pair of openings through the wall that subtend a given angle between them and a circumferential groove in a surface of the stem between the openings, there being passageways entering said cavity that are separated by the given angle, whereby rotation of the stem connects adjacent passageways via the circumferential groove. An elastomeric projection is mounted within the hollow stem so as to normally block said openings and thereby prevent flush fluid introduced into the confined space between the inner wall of the stem and the outer wall of the projection from reaching the openings and hence the passageways, but permitting the fluid to reach the openings and passageways when the cross-section of the elastomeric member is reduced by elongation.