Title:
ACCUMULATOR CHARGE CIRCUIT FOR RUNNING DAMPER SYSTEM
Document Type and Number:
Japanese Patent JP3452135
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate a problem of a fall of a hoist by return of part of pressure holding oil in a hoist cylinder from a pressure reducing valve of an accumulator charge circuit to a tank in a hoist holding state of the hoist cylinder when a damper system is not operating.
SOLUTION: This circuit is provided with a multi-control valve 3, a damper oil passage 21 communicated with the bottom side 15 of the hoist cylinder 8, an accumulator 20 provided in the damper oil passage 21, a running damper changing valve 22 to communicate or shield the accumulator side of the damper oil passage 21 with/from the bottom side 15 of the hoist cylinder 8, and a charge circuit 41 to accumulate specified pressure oil in the accumulator 20 through the pressure reducing valve 42. A charge line 43 of the charge circuit 41 is connected to the upstream side of a bucket control valve 7 of the multi-control valve 3, thereby a fall of the hoist can be prevented by return of a part of oil from the pressure reducing valve 42 in the accumulator charge circuit 41 to the tank in a hoist holding state.
Inventors:
Hidekazu Matsuba
Hiroyasu Kodera
Hiroyasu Kodera
Application Number:
JP2000244473A
Publication Date:
September 29, 2003
Filing Date:
August 11, 2000
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
E02F9/22; F15B11/00; (IPC1-7): F15B11/00; E02F9/22
Domestic Patent References:
| JP2305800A | ||||
| JP58121305A | ||||
| JP10338493A | ||||
| JP5391170U | ||||
| JP5439807Y2 |
Attorney, Agent or Firm:
Yoshihiro Tsunoda (5 others)
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