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:
Mar. 11, 2003
Filed:
May. 31, 2001
Mitsuru Saito, Saitama, JP;
Yoshihiro Yoshida, Saitama, JP;
Kazuhiro Takeuchi, Saitama, JP;
Yasushi Fujimoto, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A pressure regulating valve is provided in a hydrostatic, continuously variable transmission having a hydraulic closed circuit including a hydraulic pump, a hydraulic motor, and a high pressure oil passage and a low pressure oil passage disposed between the hydraulic pump and the hydraulic motor. The pressure regulating valve is provided for relieving the hydraulic pressure in the low pressure oil passage into the high pressure oil passage when the hydraulic pressure in the low pressure oil passage exceeds a predetermined value. The present invention prevents excessive pressure in the oil passages, particularly in the normally low pressure passage that serves as a high pressure side during a speed reducing operation, e.g. an engine braking or reverse load situation.