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:
Dec. 06, 1983
Filed:
Mar. 14, 1983
Harry G Nicoll, Norwell, MA (US);
Helix Technology Corporation, Waltham, MA (US);
Abstract
A face seal positioned between a first threaded member 12 and a second threaded member 10. The face seal provides effective sealing between rotatably secured members of a cryogenic refrigerator. The face seal comprises a seal space 32 formed by dual recess 18, 19 and 20, 21 on the first 12 and second 10 members. Disposed within the seal space is a triangular anti-rotation ring 24 and a packing member 22. The seal may be disposed upon a flange 48 in such a manner as to allow pressurized gas from a chamber 64 to pressurize the seal space 32. Further, the flange may be angled so as to apply a preset spring force upon the seal space. Alternatively, the anti-rotation ring may be a tubular member incorporating an angled flange to be positioned in a chamfer on one of the seal faces.