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:
Jan. 30, 2001
Filed:
Dec. 01, 1998
Applicant:
Inventors:
Assignee:
NTN Corporation, Osaka-fu, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16H 2/524 ;
U.S. Cl.
CPC ...
F16H 2/524 ;
Abstract
A plurality of balls,are disposed for rolling and circulation in a spiral calculation passage defined between a spiral screw groove surface,formed on the outer periphery of a screw shaft,and a spiral screw groove surface,formed on the inner periphery of a ball nut,. The opposite ends of the ball nut are each formed with a seal mounting portion,, in which a seal member,made of solid lubricating composition is mounted, sealing off the ball nut,. The ball nut,has lubricating grease G sealed therein.