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Title:
HYDROSTATIC OPERATING MODE HYDRAULIC ACTUATOR PREFERABLY FOR BACKUP OPERATION IN EMERGENCY
Document Type and Number:
Japanese Patent JP3162139
Kind Code:
B2
Abstract:

PURPOSE: To reduce the required number of hydraulic circuits and to prevent an actuator from its upsizing, by combining an electrically hydraulic air servo control device with a local pumping group.
CONSTITUTION: A hydraulic actuator 1 contains a double-acting jack 10, hydraulic supply-discharge tubes 35, 34 of the jack, a housing part 16 to be connected hydraulically to the tubes 35, 34, a mobile switching member 17 arranged in the housing part 16, and a control member 51 which controls a mobile switching member 17 and makes it move between a neutral position and a working position. The housing part 16 is connected by variable speed pumping groups 60, 61 via an auxiliary circuit. The mobile switching member 17 implements the second operation in which the jack communicates with the auxiliary circuit. As a result, the jack, the pump groups, and the auxiliary circuit constitute a hydraulic transmission mechanism.


Inventors:
Favre, Christian
Van, Den Bossche Dominique
Application Number:
JP1991000312998
Publication Date:
April 25, 2001
Filing Date:
September 19, 1991
Export Citation:
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Assignee:
Aerospat, Soc Natl Ind
International Classes:
B64C13/42; B64C19/02; F15B9/09; F15B20/00; (IPC1-7): B64C13/42; B64C19/02; F15B9/09
Attorney, Agent or Firm:
川口 義雄 (外3名)