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:
May. 25, 1999
Filed:
Feb. 19, 1997
Applicant:
Inventors:
Assignee:
NSK Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74459 ; 74 8915 ; 7442 / ; 277562 ;
Abstract
Nut 2 in threadable engagement with the screw shaft 1 of a feed screw apparatus is fitted with a lubricant supply device 30 which also serves as a seal. This device is made of a lubricant-containing rubber or synthetic resin and has a plurality or projections 31 in the inner surface that contact the outer circumference of the screw shaft 1. The lubricant in said rubber or synthetic resin slowly seeps out unoxidized for an extended period of time to perform effective lubrication.