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Title:
MEANS FOR RECEIVING HYDRAULIC FLUID INTO HYDRAULIC SYSTEM AND SUBSEQUENTLY EMPTYING FLUID FROM HYDRAULIC SYSTEM
Document Type and Number:
Japanese Patent JPH0392602
Kind Code:
A
Abstract:

PURPOSE: To prevent generation of any problem following leak of gas and eliminate a low pressure accumulator by providing a receiving cylinder and a high pressure cylinder axially arranged to cooperate with each other and form a functional unit.

CONSTITUTION: When a piston rod 3 is making a quick stroke, a valve 32 in a discharge conduit 16 is opened, while a valve 10 in a bypass pipe 9 is closed. Hydraulic fluid flows in an arrow direction to be forcedly sent from a supply conduit 8 into a work cylinder 1, but it is also mechanically sent from a high pressure cylinder 13 into the cylinder 1 by a device 30 mutually and alternately powered mechanically by a piston 19 of a receiving cylinder 12 and a piston rod 31, and by the force of hydraulic fluid pressure to a piston 19 supplied simultaneously from the side 5 of the cylinder 1. As the rod 3 of the cylinder 1 reaches an upper end position, the valve 32 is closed, and the valve 10 is opened, so a direction is changed to make a slow stroke. At this time, a surface of a piston 2 is larger on the side 5 than on the side 4, so it is moved downward.


Inventors:
Jonsson, Allan
Application Number:
JP1990000224538
Publication Date:
April 17, 1991
Filing Date:
August 28, 1990
Export Citation:
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Assignee:
KAMYR AB
International Classes:
F15B11/024; F15B3/00; (IPC1-7): F15B11/02



 
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