초록 ▼

An automatic safety mechanism including an actuator for operating a valve or other controlled unit and which is operable by compressed air or other pressurized fluid, a valve structure for controlling the delivery of pressurized fluid from a source to the actuator, a shock responsive mechanism opera

An automatic safety mechanism including an actuator for operating a valve or other controlled unit and which is operable by compressed air or other pressurized fluid, a valve structure for controlling the delivery of pressurized fluid from a source to the actuator, a shock responsive mechanism operable by shock forces to actuate the valve structure to a condition operating the actuator by fluid from the source, and a device operable automatically in response to a decrease in the pressure of fluid from the source to admit pressure fluid to the actuator for operating it. An assembly for resetting the shock responsive mechanism to a cocked position includes a shaft operable by rotation about an axis to set the mechanism, a sleeve disposed about the shaft, and a retaining element movable to a position in the path of axial removal of the sleeve from the device to retain both the sleeve and shaft against withdrawal. The device preferably includes a swinging arm which is spring urged in a predetermined direction and is released for movement in that direction automatically in response to shock forces, and which acts through two cams to operate two valves for controlling the delivery of pressure fluid to and from the fluid actuated controlled unit.

대표청구항 ▼

For use a source of pressurized fluid and an actuator operable by the pressure of fluid from said source, the combination comprising: valve means for controlling the delivery of pressurized fluid from said source to said actuator; a shock responsive mechanism operable by shock forces to actuate said

For use a source of pressurized fluid and an actuator operable by the pressure of fluid from said source, the combination comprising: valve means for controlling the delivery of pressurized fluid from said source to said actuator; a shock responsive mechanism operable by shock forces to actuate said valve means to a condition operating said actuator by pressurized fluid from said source; and a device operable automatically in response to a decrease in the pressure of said fluid from said source to admit pressurized fluid to said actuator for operating it.