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:
Sep. 04, 1990
Filed:
Nov. 16, 1988
Heinz K Muller, Waiblingen, DE;
Busak & Luyken GmbH & Co., Stuttgart, DE;
Abstract
A sealing ring structure comprises a sealing ring provided with sealing edges which are arranged adjacent its ends and are in contact with a second machine part, and a stressing ring embracing the sealing ring, loading it in the radial direction and being fitted into an annular recess in the sealing ring. The tightness of such a structure at high fluid pressures is improved by the fact that the stressing ring is accommodated in a trapezoidal annular groove in the sealing ring which communicates with the space between the sealing edges by radial bores. The stressing ring, which is fixed in the groove of the sealing ring, is shifted in operation in response to the prevailing pressures whereby the sealing edge on the high-pressure side is relieved from pressure while the contact pressure exerted upon the sealing edge on the low-pressure side is simultaneously increased. The pressure fluid is thereby permitted to escape from the space between the two sealing edges, at the pressure-relieved sealing edge on the high-pressure side and/or through the radial bores, and any leakage caused by the sealing ring being lifted is safely prevented, even in the presence of very high pressures.