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. 09, 1987
Filed:
Sep. 25, 1984
Johan C Bras, Tricht, NL;
Hendrik W Wevers, Goes, NL;
SKF Industrial Trading and Development Company B.V., Nieuwegein, NL;
Abstract
A sealing ring for a rotary shaft which serves to retain and/or return a lubricant, includes a generally annular rigid supporting member and a generally annular elastic sealing member connected to the supporting member. The sealing member terminates in a sealing surface contacting the shaft with one side of the sealing surface directed toward the ring lubricant and the other side toward the atmosphere. On the atmospheric side, spaced-apart projections rest against the shaft surface. Projections on the lubricant side also press against the shaft surface. The projections on both sides include edges oriented obliquely to the shaft axis which provide pumping action when the shaft rotates. Lubricant pumped under the sealing surface to the atmospheric side by projections on the lubricant side is pumped back by the projections on the atmospheric side. In the process the seal is lubricated.