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. 24, 1979
Filed:
Feb. 02, 1978
Jerry G Jelinek, La Habra, CA (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
A packing ring of resilient material for down hole sealing of oil well casing against high fluid pressure. The ring is in the general form of a U cup with inner and outer lips. The outer lip is relatively thick and has an outer corner rounded to a large radius that merges with a concave radius on the radially outer surface of the lip to more easily pass over projections and imperfections in surfaces to be sealed by the lip. The inner corner of the outer lip is also rounded to facilitate entry of fluid between the lips for pressing the lips into sealing contact with the surfaces to be sealed. The invention includes the assembly of the packing ring with a sleeve or other part upon which the ring is mounted, the ring being bonded to such part and having a large radius at one end where it is bonded so as to make the bond more secure.