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:
May. 24, 1994
Filed:
Jul. 07, 1992
Applicant:
Inventor:
Glenn Bonney, Macungie, PA (US);
Assignee:
APD Cryogenics, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
62 512 ;
Abstract
The throttling sensitivity of a demand flow cryostat may be controlled and stabilized by selectively exposing refrigerant to the surface of a sensor which actuates a refrigerant throttle valve. The sensor is formed of a plastic material such as high density polyethylene which has a high coefficient of thermal contraction.