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. 28, 1982
Filed:
Dec. 30, 1981
Peter Durenec, Annandale, VA (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
Two embodiments of a Stirling cooler are shown. Each embodiment includes usual compressor portion and cold finger portion. The compressor is improved by inserting a vibration damper in the master piston rod by employing a unique evacuating-charging valve, and be inserting an in-line filter in the cryogen passageway between compressor and cold finger. The cold finger is improved by lining the inside of the displacer-regenerator piston with a highly reflective coating and by inserting a good heat conducting spring between the end of the piston and the opposite wall of the cold finger expansion chamber. In one embodiment, the drive for the compressor crankshaft is improved by using herringbone reduction gears with the layer gear counterbalanced and by using a torsional drive shaft between the electric drive motor and the small herringbone gear. The other embodiment uses direct torsion-shaft drive of the crankshaft, but with a counterbalance on the crankshaft in the form of a weight on a flexible arm.