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:
Jan. 12, 1988
Filed:
Feb. 26, 1986
Hideo Okoshi, Fujisawa, JP;
Nippon Seiko Kabushiki Kaisha, Tokyo, JP;
Abstract
A spool valve for changing transmission ratio for a toroidal type infinitely variable transmission is composed of, a valve housing tightly attached to a fixed member and leaving internal fluid passages, a spool is disposed in the housing and is slidable in an axial direction so as to confront with the various fluid passages to control the supply of pressurized fluid, and a cam follower made as a discrete member from the spool is disposed between the spool and a cam face to reduce the amount of displacement of the spool. The relative position of the spool with respect to the fluid passages is changed by a transmission ratio setting means to prevent the valve housing itself from displacing during the transmission ratio controlling operation.