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. 19, 1978
Filed:
Aug. 10, 1977
Douglas J Bingler, Furlong, PA (US);
Milton Roy Company, St. Petersburg, FL (US);
Abstract
The present invention relates to a centrifugal pump assembly in which an impeller is mounted to a motor shaft without the need for precision machining of the shaft and in which the proper spacing is automatically achieved between the impeller and the pump housing. An end of the motor shaft projects toward an impeller chamber in which a rotary impeller is situated. The impeller hub has a bore therein through which a threaded fastening means passes. The threaded fastening means mates with a threaded well in the end of a motor shaft. However, a coil spring which surrounds the fastening means abuts the shaft end and also abuts the impeller hub. The spring biases the impeller away from the wall of the pump housing and toward the interior of the impeller chamber. The spring prevents the impeller from abutting against the housing wall and the bias of the spring may be adjusted to compensate for variations in the shaft length. Further, the head of the fastening means resides within a recess in the impeller hub, the depth of which is equal to the predetermined spacing required between the impeller and the impeller housing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile