Title:
EMERGENCY OPERATION VALVE AND UNLOADING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2017/175820
Kind Code:
A1
Abstract:
Provided is an emergency operation valve capable of alternatively switching between an open state and a closed state, wherein the emergency operation valve is configured so as to be provided with a valve box having a hollow valve chamber, a first oil channel formed in the valve box as an oil channel for hydraulic oil supplied to the valve chamber, a second oil channel formed in the valve box as an oil channel for hydraulic oil discharged from the valve chamber, a pressure receiver disposed in the valve chamber so as to be capable of shifting between a first position at which the first oil channel communicates with the second oil channel and a second position at which the first oil channel is blocked from the second oil channel, and an elastic member for urging the pressure receiver in a direction toward the first position from the second position.
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Inventors:
GOTO TOMOKAZU
Application Number:
PCT/JP2017/014320
Publication Date:
October 12, 2017
Filing Date:
April 06, 2017
Export Citation:
Assignee:
TADANO LTD (JP)
International Classes:
F16K31/363; B66C13/20; F15B11/028; F15B20/00
Foreign References:
| JPS59186569U | 1984-12-11 | |||
| JP2010107009A | 2010-05-13 |
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
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