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Patent Searching and Data


Title:
HYDROSTATIC CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
Japanese Patent JP2007092805
Kind Code:
A
Abstract:

To provide a hydrostatic continuously variable transmission capable of restricting hunting in a load control mechanism to smoothly and stably control a load by obtaining a sufficient back pressure effect, in regard to structure for controlling a load by using pressure oil of a main oil passage connecting a hydraulic pump to a hydraulic motor, while using pressure oil of a charge oil passage as the back pressure against the pressure oil from the main oil passage.

A throttle section (a slow return valve 60) communicated with a chamber 142a provided on a side (a side opposite to a side communicated with the main oil passage) of a spool 141 inside a cylinder 40 of the load control mechanism 104, is provided near the chamber 142a.


Inventors:
SAKATA KOJI
MOCHIZUKI YASUHISA
Application Number:
JP2005000280567
Publication Date:
April 12, 2007
Filing Date:
September 27, 2005
Export Citation:
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Assignee:
YANMAR CO LTD
International Classes:
B60K17/10; F16H39/14; F16H61/40
Domestic Patent References:
JP2004011769A2004-01-15
JPH11166621A1999-06-22
JPS4013806B1
JPS494103B11974-01-30
Foreign References:
WO2007034578A12007-03-29
Attorney, Agent or Firm:
矢野 寿一郎