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.

Date of Patent:
May. 08, 1979

Filed:

Sep. 16, 1977
Applicant:
Inventor:

Clifford H Allen, Chesterland, OH (US);

Assignee:

Other;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C / ; F01C / ;
U.S. Cl.
CPC ...
418 48 ; 64 / ; 64 / ;
Abstract

A stress relief device for a flexible shaft used to connect a rotary drive to a rotary load, wherein the shaft flexes in response to loads that produce bending stresses during shaft rotation. The shaft has a radial flange, or hub, on at least one end for connecting the respective end to another radial flange on either the rotary drive or the rotary load. In order to relieve the joint between the shaft and the hub from the stress concentration that occurs due to flexure of the shaft while being supported in built-in fashion as a cantilever beam, an annular stress relief member is mounted on the shaft inwardly of and tightly secured to the radial flange, or hub. The specially designed stress relief member is tightly positioned around the underlying cylindrical surface portion of the shaft to provide a fixed-end cantilever-type support therefor so that bending stresses occurring due to shaft flexure are more gradually transmitted to and through the stress relief member to avoid stress concentration at the junction of the shaft and the radial flange, or hub.


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Allen, Clifford. (1979). Rotor drive coupling for progressing cavity pump (U.S. Patent No. 4153397). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4153397

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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