# US 2013/0239797 A1 · Hydraulic cylinder system

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- Number: US 2013/0239797 A1
- Document ID: US20130239797A1
- Status: Published application
- Kind: A1
- Application number: 13/989,481
- Filed: 2011-11-10
- Published: 2013-09-19
- Earliest claimed: 2010-11-25
- Assignees: Mitsubishi Heavy Industries, Ltd.; Shimadzu Corporation
- Inventors: Hirofumi Okamoto; Masayoshi Okuda
- Web page: https://patentgrep.com/patent/US20130239797A1

## CPC

- B64C 13/505: {having duplication or stand-by provisions}
- B64C 13/504: {using electro-hydrostatic actuators [EHA's]}
- F15B 18/00: Parallel arrangements of independent servomotor systems
- F15B 2211/7107: the output members being mechanically linked
- F15B 2211/8757: using redundant components or assemblies
- B64C: AEROPLANES; HELICOPTERS
- F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR

## Abstract

A hydraulic cylinder system 1 is provided with a plurality of cylinders 3a and 3b, valves 4a and 4b provided at each of the cylinders 3a and 3b for adjusting amounts of operating fluid into and out of the cylinders 3a and 3b, driving systems 5a and 5b having motors 6a and 6b provided at each of the valves 4a and 4b for driving the valves 4a and 4b, and a connecting member 8 for connecting the motors 6a and 6b of the driving systems 5a and 5b in a manner capable of interlocking with each other.

## Claims

### Claim 1

A hydraulic cylinder system comprising:
a plurality of cylinders;
a valve provided at each cylinder for adjusting amount of operating fluid into and out of the cylinder;
a driving system having a motor provided at each valve and driving the valve; and
a connecting member connecting the motors of the driving system in a manner capable of interlocking with each other.

### Claim 2 (depends on 1)

The hydraulic cylinder system according to claim 1, wherein
pistons of the plurality of cylinders are connected to each other in a manner capable of integral operation;
only the motor of either one of the plurality of driving systems is operated;
operating fluid is supplied from the valve driven by the motor of this driving system to the cylinder; and
the piston of the cylinder is driven so as to drive a driving target connected to a piston connection portion.

### Claim 3 (depends on 1)

The hydraulic cylinder system according to claim 1, wherein
pistons of the plurality of cylinders are connected to each other in a manner capable of integral operation;
each of the motors of the plurality of driving systems is operated;
operating fluid is supplied from each valve driven by the motor of each driving system to each cylinder; and
the piston of each cylinder is driven so as to drive a driving target connected to a piston connection portion.

### Claim 4 (depends on 1)

The hydraulic cylinder system according to claim 1, wherein
a disconnecting mechanism for disconnecting each of transmission of power between the connecting member and each motor is provided between the connecting member and each of the motors; and
if a failure of the motor is detected, this disconnecting mechanism is operated so as to disconnect the transmission of power between the connecting member and the motor in which the failure is detected.

### Claim 5 (depends on 2)

The hydraulic cylinder system according to claim 2, wherein
a disconnecting mechanism for disconnecting each of transmission of power between the connecting member and each motor is provided between the connecting member and each of the motors; and
if a failure of the motor is detected, this disconnecting mechanism is operated so as to disconnect the transmission of power between the connecting member and the motor in which the failure is detected.