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. 08, 1988
Filed:
Jan. 20, 1987
Johan C Bras, Tricht, NL;
Hendrik W Wevers, Goes, NL;
SKF Industrial Trading & Development Co., B.V., Nieuwegein, NL;
Abstract
An improved seal for a rotary shaft which exerts a pumping effect on a lubricant on its shaft. The seal comprises a substantially rigid annular supporting member and a generally annular elastic sealing member affixed coaxially to the supporting member and extending radially inwardly of the supporting member. The radially inner surface of the said sealing member defines a sealing contact surface adapted to sealingly contact the shaft. The improvement includes a first circumferentially extending portion on the sealing contact surface and a plurality of projecting portions extending axially from one side of the first portion and being circumferentially spaced apart, the first portion having a substantially constant axial width throughout its circumferences. The first portion also extends at an acute angle with respect to the axis of the rotary shaft, the projections having circumferentially extending edges spaced from the one side of the first portion and joined to second and third edges which extend to the one side of the first portion at acute angles thereto.