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:
Nov. 02, 1999
Filed:
May. 14, 1997
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A gear ratio is controlled to infinity so as to allow a vehicle to get underway smoothly with a hydrostatic continuously variable transmission equipped with a hydraulic pump having a cam plate with a fixed angle of inclination and a hydraulic motor having a cam plate with a variable angle of inclination. First distributing valves allow the cylinder holes of a hydraulic pump to selectively communicate with a low pressure oil circuit and high pressure oil circuit are operated by a first eccentric ring located in an eccentric weight ring. The eccentric weight ring rotates along with an input cylinder shaft and moves as a result of centrifugal force in a direction tilted 45.degree. with respect to an imaginary trunnion line O.sub.1 of the hydraulic pump so that the phase in the direction of eccentricity of the first eccentric ring is automatically changed. The first eccentric ring is off center in the direction perpendicular to the imaginary trunnion line O.sub.1 during low speed rotation, resulting in an infinite gear ratio, and is off center in the direction along the imaginary trunnion line O.sub.1 during high speed rotation, resulting in a gear ratio with a prescribed low value.