Hydrostatic transmission

Patent metadata

Field	Value
Publication number	US-9103359-B2
Application number	US-201313754559-A
Country	US
Kind code	B2
Filing date	Jan 30, 2013
Priority date	Feb 9, 2012
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

A hydrostatic transmission comprises a hydraulic pump, a hydraulic motor, first and second main fluid passages fluidly connecting the hydraulic pump to the hydraulic motor so as to constitute a closed fluid circuit, a charge fluid passage, a plurality of first charge check valves and a plurality of second charge check valves. The plurality of first charge cheek valves are interposed between the charge fluid passage and the first main fluid passage so as to allow only flow of fluid from the charge fluid passage to the first main fluid passage when the first main fluid passage is hydraulically depressed relative to the charge fluid passage. The plurality of second charge check valves are interposed between the charge fluid passage and the second main fluid passage so as to allow only flow of fluid from the charge fluid passage to the second main fluid passage when the second main fluid passage is hydraulically depressed relative to the charge fluid passage.

First claim

What is claimed is:

1. A hydrostatic transmission comprising:
a hydraulic pump;
a hydraulic motor;
first and second main fluid passages fluidly connecting the hydraulic pump to the hydraulic motor so as to constitute a closed fluid circuit;
a charge fluid passage;
a plurality of first charge check valves interposed between the charge fluid passage and the first main fluid passage so as to allow fluid to flow from the charge fluid passage to the first main fluid passage whe…

Assignees

• Kanzaki Kokyukoki Mfg Co Ltd

Inventors

• Mochizuki Yasuhisa

Classifications

• F15B21/00 Primary

  Mechanical Engineering · mapped topic

• F16H61/4078 Primary

  Mechanical Engineering · mapped topic

• F16H61/4139

  Mechanical Engineering · mapped topic