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:
Apr. 20, 1982
Filed:
Oct. 06, 1980
David J McFarlin, Ellington, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
An improved cryopump has cryopanels with pressed zeolite plates mounted thereon. The plates are maintained in intimate but unbonded contact with the panels by use of spring-type mechanisms. Older style panels have clay-bonded zeolite casts attached to their surfaces. The new configuration allows relative expansion and contraction between the zeolite plates and the panels, thereby improving durability of the zeolite. The resilient attachments assure that intimate contact and consequent good cooling of the zeolite adsorptive surface will be maintained during operation of the pump. The zeolite panels are desirably less than about 8 mm thick and are made by isostatic compaction of powders having pore sizes in the range of 2-25.times.10.sup.-10 m.