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:
Sep. 19, 1989
Filed:
Aug. 05, 1988
Applicant:
Inventor:
David J Klee, Emmaus, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F25D / ;
U.S. Cl.
CPC ...
62 63 ; 62266 ; 62381 ;
Abstract
A method and apparatus for controlling movement of the refrigerated atmosphere (e.g. gaseous cryogen) contained inside the insulated chamber of a spiral type freezer out of, or ambient atmosphere into, the lower opening of the freezer by establishing a positive pressure of ambient atmosphere adjacent the inlet opening of the freezer.