Title:
Releasable Stop For A Vehicle Moving Through A Conduit
Releasable Stop For A Vehicle Moving Through A Conduit
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Abstract
A releasable stop for releasably stopping a vehicle moving through a conduit. A stop gate is supported for pivotal movement into and out of the path of movement of the vehicle. First and second arms are pivotally connected together between the gate and a support and a pneumatic piston and cylinder assembly actuates one arm for moving the gate between a closed and opened position. The pivoting arms are moved into or slightly past a dead center position when the gate is in the closed position whereby the impact of a vehicle engaging the gate will be transmitted to the support instead of to the piston and cylinder assembly. When the gate is closed, the dead center position of the arm maintains the stop gate in a locked position. The stop gate may be sized and shaped to entirely block the conduit to provide a dead end air cushion stop assist. In addition, the gate, the arms and the piston and cylinder assembly may be mounted on a movable support and a shock absorber may be connected to the movable support for resisting movement when heavy loads engage the gate.
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Date Issued
8/22/1978
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Text
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Patent