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:
Jun. 20, 2006
Filed:
Nov. 19, 2002
Isamu Yoshida, Shizuoka-ken, JP;
Keisuke Kazuno, Shizuoka-ken, JP;
Isamu Yoshida, Shizuoka-ken, JP;
Keisuke Kazuno, Shizuoka-ken, JP;
NTN Corporation, , JP;
Abstract
A ball screw in a continuously variable speed transmission has an axially immovable pulley half () and axially movable pulley half () both mounted on a rotary shaft (). The axially movable pulley half () is moved by a ball screw () so as to infinitely vary the belt wrapping radius and thus the transmission speed. A nut (), forming one part of the ball screw (), is immovably secured in both axial and rotational directions. A screw shaft (), forming the other part of the ball screw (), is movable in both axial and rotational directions. The screw shaftis connected to the axially movable pulley half (). The axially movable pulley half () is axially moved by rotating the screw shaft ().