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:
Oct. 26, 1993
Filed:
Mar. 14, 1991
Applicant:
Inventors:
Sujith N Mally, Federal Way, WA (US);
David W Sharpe, Bothell, WA (US);
Jeffrey L Colehour, Bellevue, WA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L / ;
U.S. Cl.
CPC ...
15409 ; 417151 ;
Abstract
An air pressure powered vacuum has a housing with a continuous channel through it. Positive pressure air is introduced into and accelerates in an annular shaped plenum in the housing. The high velocity air is diffused from the plenum into the channel towards a debris collection bag. The diffuser is shaped so that the air diffuses at an angle with respect to the surface of the channel and such that laminar air flow occurs adjacent said channel wall downstream. This creates strong suction at the channel inlet and debris is carried to the collection bag.