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:
Nov. 20, 1979
Filed:
Jun. 30, 1977
Bernard M Hadaway, Highett, AU;
Repco Research Proprietary Limited, Victoria, AU;
Abstract
A fluid seal for use between two relatively rotatable members and including a body section to be secured to one member or its support, and a circular lip projecting from the body for sealing engagement about or around a surface of the other member. The lip is defined by two angularly arranged surfaces which meet at a common edge to form a sealing edge of the lip, and a pumping configuration is provided on one of those surfaces. A feature of the invention is the provision of discontinuities around the lip edge so that relatively small discrete passages provide a communication between the two sides of the lip whereby fluid can be returned through the seal under the influence of the pumping configuration. The discontinuities can be formed by projections on the lip edge which are depressed to create the communication passages through distortion of the lip, or they may be recesses or gaps preformed in the lip edge.