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:
Apr. 10, 1979
Filed:
Sep. 22, 1977
Applicant:
Inventor:
Robert L Benton, Bay City, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ;
U.S. Cl.
CPC ...
74459 ; 74 8915 ;
Abstract
Ball nut and screw are grooved to form helical race for an endless train of balls that circulate through the assembly. Leading and trailing turns of the race are connected by a return passage which includes an intermediate passage extending longitudinally of the nut. Special guide tracks in end sections of the ball nut have radially relieved paths, which allow high speed balls acted upon by centrifugal forces to travel along the outer surface thereof to avoid mechanical pick up to provide for smooth vibration-free linear movement of the ball nut along the rotating screw.