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:
Feb. 18, 2003
Filed:
Aug. 22, 2000
Applicant:
Inventors:
Brian D. Sowards, Mooresville, NC (US);
Eugene Cheng, Plano, TX (US);
Assignee:
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 3/112 ;
U.S. Cl.
CPC ...
F16K 3/112 ;
Abstract
A system and method for controlling air flow into a rotary screw compressor is provided. The system includes an unloader valve for controlling airflow into the compressor. An anti-rumble system may be included in the unloader valve housing. The unloader valve is an air operated sleeve-type valve. The anti-rumble system includes an integrated vent path for the discharge side of the compressor. All moving parts are sealed within the unloader housing to prevent malfunction due to dirt entering the mechanism.