Device for preventing unintentional restarting
AssigneeGeorg Fischer Rohrverbindungstechnik GmbH
InventorRonny-Michael Priese
Life of this patent
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Abstract
A device for preventing the unintentional restarting of motors or machines is proposed, it being possible to control the supply of energy to the motor or to the machine by means of a control valve with a mechanically adjustable control element and it being possible to connect the control valve non-detachably to the motor or to the machine, the energy for the motor being generated by means of compressed air, and in that a pneumatic piston, to which the primary air pressure prevailing upstream of the motor and upstream of the control valve can be applied, being arranged as a restarting inhibitor between the control valve and the motor, and in that, in order to apply the primary air pressure, a connecting line being arranged between the motor and the piston.
Claims7
In combination, a fluid motor and safety means for preventing unintentional restarting of the fluid motor in the event of interruption of the feed of fluid under pressure to the fluid motor comprising:
- a fluid motor;
- a source of fluid under pressure;
- conduit means for feeding fluid under pressure to the fluid motor;
- valve means in the conduit means movable between a first position where the flow of fluid under pressure to the fluid motor is blocked and a second position where fluid under pressure is communicated to the fluid motor;
- actuating means for moving the valve means from the first position to the second position;
- and
- safety means for receiving fluid under pressure for holding the safety means in a first position when said actuating means moves the valve means to the second position, the safety means includes means for biasing the safety means to a second position when the flow of fluid under pressure to the safety means ceases thereby allowing the valve means to move to the first position wherein flow of fluid to the motor is blocked.
Dependencies are inferred from the claim text.