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:
May. 28, 1991
Filed:
Jul. 06, 1989
Hans Forch, Birkenau, DE;
Firma Carl Freudenberg, Weinheim/Bergstr., DE;
Abstract
A slide ring seal to seal about a shaft with respect to a housing, including a slide ring 4 made of PTFE pressed against a counter surface 3, which is relatively rotatable, by means of pressure P of the medium to be sealed and basically extends in radial direction. The slide ring 4 has a basically rectangularly defined cross-sectional profile having a radially internal or radially external circumference surface 6, 5 basically extending parallel to the axis of the slide ring seal. The slide ring 4 is provided with a sealing edge 7 axially extending beyond the profile of a major portion of the cross section of the slide ring towards the counter surface and formed during manufacture. The sealing edge 7 has a diameter which is basically identical with the diameter of the circumference surface 6 exposed to pressure P of the medium to be sealed and it can be resiliently pressed to be surface planar with the profile of slide ring 4 by means of pressure P.