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. 30, 1989
Filed:
Jun. 20, 1988
Applicant:
Inventor:
Calvin L Ayres, New Tripoli, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 38 ; 62 33 ;
Abstract
The present invention is an improvement to a conventional, single column, cryogenic, nitrogen generator which is able to produce nitrogen at near atmospheric pressure. In the improvement, the product nitrogen from the rectifier column is expanded through an expansion turbine to produce refrigeration for the process. Expanding the nitrogen makes it possible for the main air compressor to operate at a much lower pressure and achieve a significant reduction in compression power as compared to conventional waste expander and air expander cycles.