US 11,994,155 B2
Cylinder device
Hideaki Yokota, Kobe (JP); and Keitaro Yonezawa, Kobe (JP)
Assigned to KOSMEK LTD., Kobe (JP)
Appl. No. 17/258,591
Filed by KOSMEK LTD., Kobe (JP)
PCT Filed Jul. 30, 2019, PCT No. PCT/JP2019/029894
§ 371(c)(1), (2) Date Jan. 7, 2021,
PCT Pub. No. WO2020/036060, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 2018-153569 (JP), filed on Aug. 17, 2018.
Prior Publication US 2021/0164499 A1, Jun. 3, 2021
Int. Cl. B23Q 3/08 (2006.01); F15B 15/14 (2006.01); F15B 15/28 (2006.01)
CPC F15B 15/2807 (2013.01) [B23Q 3/082 (2013.01); F15B 15/1409 (2013.01); F15B 15/1423 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A cylinder device comprising:
a housing;
a piston inserted in the housing, the piston being configured to move in an axial direction to a lock side and to a release side;
a first detection valve provided to the housing, the first detection valve being configured to detect an operational state of the piston;
a second detection valve provided to the housing, the second detection valve being configured to detect the operational state of the piston;
an air supply passage provided to the housing, the air supply passage being configured to supply air either to the first detection valve and then to the second detection valve or to the second detection valve and then to the first detection valve; and
at least one air passage provided to the housing, the air passage communicatively connecting the first detection valve and the second detection valve to each other in series, and the air passage being configured to supply air either from the first detection valve to the second detection valve or from the second detection valve to the first detection valve,
wherein the second detection valve among the first and second detection valves is configured as a throttle detection valve including a throttle passage.