Reset mechanism for stored energy emergency barriers
AssigneeOverhead Door Corporation
InventorsDwayne Joseph Kornish, Alvin Eiterman
Life of this patent
Estimating the term…
Abstract
A stored energy emergency barrier release device comprising a barrier and a barrel member for storing the barrier thereon. The barrel member is rotatable on a stationary counterbalance shaft and a push down shaft. The release device further includes a push down spring coupled to the push down shaft for storing potential energy in order to exert a closing force on the barrier when the release device is positioned from an engaged position to a released position. The release device includes a reset mechanism interfaced with the push down spring for transmitting a lifting torque to the push down spring in response to moving the barrier from a first position to a second position to store energy within the push down spring.
Claims20
A reset mechanism for restoring energy in a movable barrier emergency release device, comprising:
- a shaft associated with a barrier, the barrier movable between a fully open position and a fully closed position;
- a push down spring coupled to the shaft and operable to move the barrier to the fully closed position upon an occurrence of an emergency event or during testing, the movement of the barrier releasing a tension of the push down spring;
- and
- wherein moving the barrier from the fully closed position to the fully open position tensions the push down spring, the tension in the push down spring being held during non-emergency or non-testing movement of the barrier.
An emergency release device for a movable barrier, comprising:
- a barrier;
- a barrel supporting the barrier, the barrier movable between a fully open position and a fully closed position;
- a counterbalance spring opposing a weight of the barrier;
- a push down spring coupled to the barrel and operable to provide a force to move the barrier to either the fully open position or the fully closed position upon the occurrence of an emergency event or during testing;
- and
- wherein after providing the force, movement of the barrier to either the fully open position or the fully closed position tensions the push down spring, the tension in the push down spring being held during non-emergency or non-testing movement of the barrier.
A reset mechanism for restoring energy in a movable barrier emergency release device, comprising:
- a push down shaft coupled to a barrier, the barrier movable between a fully open position and a fully closed position;
- a push down spring coupled to the push down shaft and operable to provide a force to move the barrier to the fully closed position upon an occurrence of an emergency event or during testing;
- a tension wheel coupled to the push down shaft, the push down shaft rotatable to release energy held in the push down spring in response to a ratchet pawl disengaging the tension wheel to exert the force to move the barrier to the fully closed position;
- and
- wherein moving the barrier from the fully closed position to the fully open position tensions the push down spring, the tension in the push down spring being held by an engagement of the ratchet pawl with the tension wheel.
Dependencies are inferred from the claim text.