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:
Nov. 09, 2004
Filed:
May. 30, 2003
Jeffrey R. Olson, San Mateo, CA (US);
Patrick J. Champagne, Portola Valley, CA (US);
Lockheed Martin Corporation, Bethesda, MD (US);
Abstract
A pulse tube cryocooler ( ) is disclosed having a second cryocooler section ( ) with a single pulse tube stage ( ), and having a first cryocooler section ( ) with a pair of pulse tube stages ( ). A first pressure oscillator ( ) is associated with the first cryocooler section ( ), while a second pressure oscillator ( ) is associated with the second cryocooler section ( ). The first cryocooler section ( ) and the second cryocooler section ( ) are fluidly isolated from each other. Therefore, the charge pressure, the pressure amplitude, oscillation frequency, and working gas in each of the first cryocooler section ( ) and the second cryocooler section ( ) may be independently selected/established.