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:
Oct. 26, 1982
Filed:
Apr. 20, 1981
Applicant:
Inventors:
John E Kercheval, Wyland/Natick, MA (US);
Harry G Nicoll, Norwell, MA (US);
Assignee:
Helix Technology Corporation, Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
62-6 ; 277198 ; 277236 ;
Abstract
A cryogenic refrigerator has a split seal at the interface between a displacer and cylinder. An expander ring presses the seal ring against the cylinder. The seal ring is also axially loaded against one face of a groove in which it is positioned. Preferred spring elements for axially loading the seal ring include a U-cross-section spring and a spring washer.
Kercheval, John. (1982). Split ring seal for cryogenic refrigerator (U.S. Patent No. 4355519). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4355519
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile