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. 09, 2007
Filed:
Jan. 16, 2003
Shinya Nakatani, Kanagawa, JP;
Masahiko Yamazaki, Kanagawa, JP;
Hirotoshi Miyajima, Kanagawa, JP;
Yasuyuki Matsuda, Kanagawa, JP;
Shinya Nakatani, Kanagawa, JP;
Masahiko Yamazaki, Kanagawa, JP;
Hirotoshi Miyajima, Kanagawa, JP;
Yasuyuki Matsuda, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm/s in kinematic viscosity at 40° C.