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:
Mar. 13, 1990
Filed:
Oct. 06, 1986
Danny S Meyer, Richmond, TX (US);
Cooper Industries Inc., Houston, TX (US);
Abstract
A fluid pressure sealing assembly 40 adapted for bi-directional sealing of the annulus between two coaxially disposed cylindrical surfaces 16, 48 and including a stack of packing rings 41 sandwiched between a pair of retainer rings 43, 45. The packing assembly is held together by a plurality of pins 80, each of which extends through aligned openings in the packing rings 41 and into blind bores 81, 82 in the respective retainer rings 43, 45 on both sides of the packing rings. The surface of a retainer ring at each end of the sealing assembly 40 which is to be exposed to fluid pressure in the annulus is of greater area than the surface contact area of the adjacent packing ring 41 contacting the retainer ring because of the cross-sectional area of the pin holes so that the force which is transmitted to the packing rings from a retainer ring is amplified and increases the packing and sealing effect of the packing rings. Means 53 for mechanically applying a pre-load to the sealing assembly 40 may also be included.