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. 01, 1990
Filed:
Nov. 28, 1988
Applicant:
Inventors:
Daniel J Kvinge, St. Louis Park, MN (US);
Frederick A Powers, Maple Grove, MN (US);
Kenneth E Lehrke, Maple Grove, MN (US);
Assignee:
Graco Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417368 ; 417375 ; 62402 ; 60412 ;
Abstract
A silencing system is provided for an air-operated pump which also eliminates icing of the pump at higher cycle rates and humidities. The exhaust from the air motor powers an air flow inducer to induce a flow of relatively warm ambient air. The induced flow of ambient air is drawn across cold components of the air motor, and the mixed (ambient and exhaust air) exit stream routed away from the air motor. The relatively warm mixed air exhaust flow also allows noise reduction by conventional acoustical techniques without suffering performance degradation due to icing.