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:
Feb. 27, 1996
Filed:
Mar. 24, 1994
Applicant:
Inventors:
Ken Namimatsu, Gunma, JP;
Nobuhide Kurachi, Gunma, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ;
U.S. Cl.
CPC ...
7442 / ; 74459 ;
Abstract
In a thin-wall type ball nut of a light-weight type ball screw having a trunnion structure in which a pair of trunnion shafts are extended from the ball nut in the opposite directions; a pair of ribs for increasing the wall thickness of the ball nut are formed on both side surfaces of the ball nut in such a manner that the ribs are extended from the base portions of the trunnion shafts along the axis of the ball nut, so as to increase the rigidity of the portions of the nut body which are liable to be deformed, thereby to prevent the ball nut from deformation.