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:
Jul. 01, 1997
Filed:
Mar. 08, 1996
Firma Carl Freudenberg, , DE;
Abstract
A sealing ring inserted into the radial space between two relatively movable cylindrical surfaces of a first and a second machine part. The cylindrical surfaces surround one another coaxially, and the sealing ring includes a first device for statically stationary fixing and sealing of the first machine part, as well as a second device for movable sealing of the second machine part. The first device is formed by a retaining ring made of a polymeric material pierced by at least one relief groove and engaging the first machine part, as well as an annular lip seal situated in front of the relief groove which is acted upon by the pressure of the medium to be sealed. The lip seal elastically deforms above a preselected minimum pressure differential and disengages from the first machine part. The lip seal, under radial prestressing, is in contact with the first cylindrical surface during normal use of the sealing ring and elastically deforms in the radial direction only when the minimum pressure differential is exceeded.