Title:
ロータリ作動の電気油圧弁
Document Type and Number:
Japanese Patent JP2010513822
Kind Code:
A
Abstract:
A valve for controlling fluid flow in a fluid system is disclosed. The valve includes a housing, a servo spool, and a piston. The servo spool defines a spiral groove and a spiral land. The piston defines an orifice configured to provide flow communication to a supply of pressurized fluid and an orifice configured to provide flow communication to a portion of the fluid system exterior to the valve. The valve further includes a main spool operably coupled to the piston. The main spool is configured to control flow of fluid in the fluid system. The spiral groove and spiral land are configured such that angular displacement of the servo spool results in a force imbalance on the piston, thereby moving the piston and the main spool in one of a first direction and a second direction.
Inventors:
Philip G. Band Kerkov
Marpen Faye
Marpen Faye
Application Number:
JP2009542772A
Publication Date:
April 30, 2010
Filing Date:
November 14, 2007
Export Citation:
Assignee:
CATERPILLAR INCORPORATED
International Classes:
F15B13/043; F16K31/04
Domestic Patent References:
| JPS6069277A | 1985-04-19 | |||
| JPS3921719B1 | ||||
| JPS5341682A | 1978-04-15 | |||
| JPS3813564B1 | ||||
| JPS5222689A | 1977-02-21 | |||
| JPH02286901A | 1990-11-27 | |||
| JPS493093A | 1974-01-11 | |||
| JPS5980502A | 1984-05-10 | |||
| JPS5341682A | 1978-04-15 | |||
| JPS5368887U | 1978-06-09 | |||
| JP2001295806A | 2001-10-26 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe