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. 31, 1990
Filed:
Mar. 24, 1988
Applicant:
Inventor:
Robert D Wilkes, Little Rock, AR (US);
Assignee:
Jacuzzi, Inc., Little Rock, AR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
4151743 ; 4151701 ;
Abstract
A pump for use with a hydrotherapy tub or spa is provided wherein the compression of the pump seal located between the impeller and the drive shaft opening is controllable such that a minimum compression and thus minimum heat generation occurs at a no-load or dry condition of the pump, but maximum compression and thus maximum sealing occurs at a full-load condition. The impeller is mounted on the drive shaft in an axially movable manner with the impeller eye facing the motor so that axial loading by the impeller under load is toward the motor thus compressing the interposed seal.