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:
Jun. 14, 1988
Filed:
Nov. 13, 1986
Peter H Sheppard, Hanover, PA (US);
Other;
Abstract
An easily fabricated and assembled ball-screw mechanism of compact design comprises a cylindrical member having a helical guideway on its inner circumferential surface. The cylindrical member is operatively engaged through bearing members with a screw member having a helical groove in opposed relationship with the helical guideway. A tubular bearing return connecting each end of the helical guideway is freely received in a cavity in the cylindrical member. Each end of the tubular bearing return has a ramp which cooperates with the helical guideway to receive and release the bearing members. The bearing members are held captive in the tubular ball return and between the helical groove and helical guideway. An aperture is located in the tubular bearing return for loading the bearing members. A keeper is received in the cylindrical member to retain the tubular bearing return and includes a node to guide members across the bearing loading aperture.