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. 08, 1991
Filed:
Oct. 30, 1989
Yasuo Kita, Kyoto, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
Disclosed is a nonstep speed change gear capable of selecting low speed mode and high speed mode by the low speed side clutch and high speed side clutch, comprising a differential mechanism having a low speed side mechanical transmission line and a high speed side mechanical transmission line formed in parallel, and a fluid transmission mechanism forming a pair of fluid transmission lines of which speed is variable by fluid pump/motor being installed on the way of these mechanical transmission lines, in which when the rotation speed difference of the both clutches becomes close to zero, the operation falls into intermediate lock-up mode so that the both clutches are connected together, and in this mode the displacement of the fluid pump/motor is controlled by the control mechanism so that the differential pressure of the circuits of the fluid transmission lines may be nearly zero.