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:
Apr. 29, 1986
Filed:
Dec. 07, 1983
Keiju Abo, Yokosuka, JP;
Haruyoshi Kumura, Yokohama, JP;
Yoshikazu Tanaka, Yokohama, JP;
Hiroyuki Hirano, Yokosuka, JP;
Sigeaki Yamamuro, Zushi, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A continuously variable V-belt transmission has a change-direction gearing upstream of a drive pulley, and a hydraulic control system. The hydraulic control system comprises a shift control valve for controlling the distribution of fluid pressure between the drive and driven pulleys, a pitot tube for generating an engine revolution speed indicative signal fluid pressure, a pitot tube for generating a drive pulley revolution speed indicative signal fluid pressure indicative of not only of a revolution speed of the drive pulley in the forward direction but also of a revolution speed of the drive pulley in the reverse direction, and a shift prohibiting valve for prohibiting the supply of fluid pressure to at least one of the cylinder chambers of the drive and driven pulley until a difference between the engine revolution speed indicative signal oil pressure and the drive pulley revolution speed indicative oil pressure is less than a predetermined value.