BISTABLE PUMP AND HYDRAULIC DEVICE

Title:

BISTABLE PUMP AND HYDRAULIC DEVICE

Document Type and Number:

Japanese Patent JP2002266770

Kind Code:

A

Abstract:

To simplify a hydraulic device including a control device controlling the speed and the force of an operating state by varying a motor rotation speed and pump capacity and to provide a liquid pump suited thereto.

In a variable displacement hydraulic pump 5, a pump capacity is changed over to either the upper limit or the lower limit of a variable capacity range. Thereby, the pump 5 becomes a bistable pump and control conditions can be narrowed so as to simplify a control means. The changeover is performed by a directional control valve 5b concerned to a variable capacity mechanism 5a. The lower limit of the variable capacity range is set to be adjustable 5j. A mitigating means 5k lowering the changeover speed from the upper limit to the lower limit is also provided.

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Inventors:

HYODO KUNIKAZU
ISHIKAWA HIROYUKI
KIHARA KAZUYUKI

Application Number:

JP2001062899A

Publication Date:

September 18, 2002

Filing Date:

March 07, 2001

Export Citation:

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Assignee:

TOKIMEC INC

International Classes:

F01L1/12; F04B1/12; F04B49/00; F04B49/06; F04B53/10; F15B11/00; F15B11/02; (IPC1-7): F04B49/06; F04B1/12; F04B49/00; F04B53/10; F15B11/00; F15B11/02

Attorney, Agent or Firm:

Satou Kaori

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