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. 06, 1990
Filed:
Feb. 17, 1989
Applicant:
Inventors:
Bernard Zimmern, East Norwalk, CT (US);
Ernest Kallmann, Neuilly-s/Seine, FR;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C / ; F01P / ; C10M / ;
U.S. Cl.
CPC ...
418-1 ; 418 85 ; 418 97 ; 418D / ; 252387 ;
Abstract
In order to produce oil-free compressed air with a rotary compressor while avoiding the costs involved by a liquid-free compressor, a rotary compressor, especially a single screw rotary compressor is injected with water in which borate, preferably potassium borate is dissolved. This prevents corrosion at no additional cost while improving the bacterial purity of the air produced.