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. 28, 2006
Filed:
May. 30, 2002
Isamu Yoshida, Shizuoka, JP;
Kiyotake Shibata, Shizuoka, JP;
Masahiro Nobutomo, Shizuoka, JP;
Morihisa Yoshioka, Shizuoka, JP;
Isamu Yoshida, Shizuoka, JP;
Kiyotake Shibata, Shizuoka, JP;
Masahiro Nobutomo, Shizuoka, JP;
Morihisa Yoshioka, Shizuoka, JP;
NTN Corporation, Osaka, JP;
Abstract
A belt type infinite variable-speed drive using a ball-screw mechanism is compact and noise-free. A nut of the ball-screw mechanism is fixed to a casing and a threaded shaft is rotatably coupled to a movable pulley member through a ball bearing so that ball circulating portions on the nut will not rotate while the movable pulley member is movable axially. Also, the ball circulating portions, which are low in load bearing capacity, are oriented in such a direction that a load hardly acts on the ball-screw mechanism. This makes it possible to compactly and rationally design a belt type infinite variable-speed drive and to suppress noise due to vibration of balls in the ball circulating portions.