发明名称 |
Pneumatically movable device with a safety lock means |
摘要 |
A pneumatically movable device with a safety lock means having a movable member, a pneumatic actuator connected to the movable member and adapted to move the movable member and a direction control valve connected to the actuator. A cylinder for locking is connected between one of the ports of the cylinder and the direction control valve. A spring is disposed in the cylinder for locking. Openings provided at a chamber at a side of the spring are connected to the actuator and the directional control valve respectively through a check valve disposed for preventing the air from flowing into the cylinder for locking. Openings provided at a chamber at a side remote from the spring are connected to on one hand to the actuator through a check valve disposed for preventing the air from flowing into the cylinder for locking and on the other hand to the directional valve through the check valve with a restrictor disposed for preventing the air from flowing into the direction control valve. A locking member is attached to the piston rod of the cylinder for locking and an engaging member engageable with the locking member is attached to the movable member.
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申请公布号 |
US4802401(A) |
申请公布日期 |
1989.02.07 |
申请号 |
US19870081210 |
申请日期 |
1987.08.03 |
申请人 |
ICHIKOH ENGINEERING, LTD. |
发明人 |
OSAKI, KOUICHI |
分类号 |
F15B11/08;F15B11/06;F15B11/20;F15B15/26;(IPC1-7):F15B15/26 |
主分类号 |
F15B11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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