ULTRAHIGH PRESSURE CONTROL DEVICE

Title:

ULTRAHIGH PRESSURE CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/1994/027794

Kind Code:

A1

Abstract:

A small and inexpensive ultrahigh pressure control device wherein first and second boosters (1, 2) for pressurizing under an ultrahigh pressure the water taken into plunger chambers (3a, 3b) by virtue of the reciprocating movements of hydraulic cylinders (6a, 6b) are connected in parallel to a water discharging line (8), wherein first and second three-position selector valves (9, 10) are interposed between hydraulic pumps (11, 12) in such a manner as to reciprocate a hydraulic cylinder of each of said boosters, wherein first and second forward- and backward-motion sensors (29, 29'; 30, 30') for detecting positions near pressurization and intake stroke ends, respectively, are provided on said first and second boosters, wherein while said first booster (1) is in its pressurization stroke, a control section (31) switches said second three-position selector valve (10) from an intake position to a pre-pressurization position in accordance with a signal detected by said second backward-motion sensor (30') and then switches said first three-position selective valve (9) from a pressurization position to an intake position and said second three-position selector valve (10) from the pre-pressurization position to a pressurization position, respectively, in accordance with a signal detected by said first forward-motion sensor (29), with the same switching control being performed while said second booster (2) is in its pressurization stroke.

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Inventors:

TANINO YOSHIO (JP)
HABIRO TAKUICHI (JP)
NODA TAKAAKI (JP)
HAYASHI KOUICHI (JP)

Application Number:

PCT/JP1994/000833

Publication Date:

December 08, 1994

Filing Date:

May 25, 1994

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
TANINO YOSHIO (JP)
HABIRO TAKUICHI (JP)
NODA TAKAAKI (JP)
HAYASHI KOUICHI (JP)

International Classes:

F04B9/117; F15B3/00; B26F3/00; (IPC1-7): B26F3/00

Foreign References:

JPS5027189A

1975-03-20

Other References: