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:
Oct. 21, 2003
Filed:
Nov. 14, 2001
Applicant:
Inventors:
Yasumasa Ohya, Gifu-ken, JP;
Toyohisa Ishihara, Gifu-ken, JP;
Assignee:
Nippon Thompson Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H 5/704 ;
U.S. Cl.
CPC ...
F16H 5/704 ;
Abstract
A recirculating-ball nut and screw set mounted with a lubrication device effective in improving the sliding characteristic and also realizing maintenance-free lubrication. The lubrication device is mainly comprised of a lubricating plate accommodated in a holder attached to a ball nut. The lubricating plate is made with a tongue that will come into sliding engagement with a helical groove formed around a screw shaft. The lubricating plate is made of a sintered resinous component of porous structure in which cells are impregnated with lubricant.