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:
Jul. 13, 1993
Filed:
Oct. 22, 1991
Applicant:
Inventors:
Ed F Nicolas, Moreno Valley, CA (US);
Ian M Williamson, Redondo Beach, CA (US);
Assignee:
Stackhouse, Inc., Riverside, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55309 ; 55467 ; 55276 ;
Abstract
A surgical air vacuum apparatus includes an air pump disposed in a primary air channel for moving air between an inlet port and an outlet port of the vacuum. The air pump has properties for generating heat while moving the air, and the moving air has characteristics for cooling the pump. An air filter disposed in the primary channel has a tendency to block the air that would otherwise cool the air pump. Means is provided for combining a secondary air channel and the primary air channel along at least one passage to introduce bleed air to the pump when the filter blocks the primary channel.