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. 26, 1983
Filed:
Jul. 21, 1980
Derek A Roberts, Bristol, GB;
Rolls-Royce Limited, London, GB;
Abstract
A coupling between a hub (10) and a shaft (11) has first and second splines (512,513; 530,531) connecting the hub to the shaft. The first splines extend axially and are straight while the second splines are helical. A nut (521) on the shaft urges the hub axially toward a shoulder (527) on the shaft. The first and second splines, being of different helix angles, co-operate to urge the spline faces circumferentially into engagement to take up any clearance therebetween. The different helix angles also have the effect of limiting axial movement of the hub under the nut load. On application of the nut at an initial moderate torque the hub takes up an initial axial position. On further, more powerful, application of the nut, the hub is urged axially against the shoulder (527) which provides a final limit to movement of the hub thereby to avoid undue circumferential stress in the splines.