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:
Dec. 07, 1982
Filed:
Jul. 01, 1981
Applicant:
Inventor:
Rainer R Schulz, Sparks, NV (US);
Assignee:
Parise & Sons, Inc., Sparks, NV (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L / ;
U.S. Cl.
CPC ...
15326 ; 15413 ; 417312 ;
Abstract
A unitary tubular exhaust duct directs exhaust air from a scroll type outlet for a vacuum pump mounted within a hot water vacuum extraction machine into a baffled exhaust expansion chamber. Noise reduction is accomplished by mixing the exhaust air with the motor cooling air aspirated into the expansion chamber by an exhaust duct branch terminating at its end remote from the exhaust expansion chamber in a cylindrical shroud which surrounds the vacuum pump electrical drive motor casing and the area of the cooling air exhaust holes within that motor casing.