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. 21, 2006
Filed:
Jun. 19, 2003
Taikou Nawamoto, Kanagawa, JP;
Kenichi Sugiyama, Kanagawa, JP;
Satoshi Dairokuno, Kanagawa, JP;
Yukiyoshi Okazaki, Kanagawa, JP;
Taikou Nawamoto, Kanagawa, JP;
Kenichi Sugiyama, Kanagawa, JP;
Satoshi Dairokuno, Kanagawa, JP;
Yukiyoshi Okazaki, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A rod body () is formed of magnetostrictive material and includes one end portion () fixed, and a piston () is fixed to the other end portion () of the rod body (). The piston () is slidably disposed within a cylinder () in which there is formed a pump chamber (). A suction port () for sucking lubricating oil into the pump chamber () is formed in the cylinder (), while a suction valve () for preventing the lubricating oil from flowing out from the suction port () is disposed in the suction port (). In the cylinder (), there is disposed a nozzle () which communicates with the pump chamber () and has a sectional area smaller than the lubricating oil passage sectional area of the suction valve (). There is disposed a coil () outside the rod body () and, to the coil (), there is connected a control device () for controlling the supply of a current to be supplied to the coil ().