Gate with counterweight and lowering exchangeable span
AssigneeJacek Kuhnl-Kinel
InventorsJacek Kuhnl-Kinel, Piotr Wojciechowski
Life of this patent
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Abstract
The gate has an exchangeable span that is fixed to the load bearing beam and is connected with pulley bearings and rope-slings to the system of adjustable counterweights. The drive system is fitted with an electric drive with a worm-wheel mounted to the load bearing beam that travels vertically along the worm. The beam, span and the drive travel on adjustable guiderails inside a reinforced concrete pit in the direction opposite to that of counterweights. The load bearing beam is fitted with rollers and retaining rollers mounted to the cover. Emergency (manual) operation of the gate is possible by turning a crank handle connected with the worm, having released the lock that prevents the worm from rotating on its axis.
Claims13
A gate comprising:
- (a) a pair of vertical guiderails secured to opposed walls in a pit below a surface of the ground;
- (b) a load bearing beam;
- (c) a span secured to and projecting from the load bearing beam;
- (d) rollers connected to the load bearing beam and disposed within the vertical guiderails for facilitating movement of the load bearing beam within the vertical guiderails from a first position with the span disposed below the surface of the ground to a second position with the span projecting above the surface of the ground;
- (e) first means for counterbalancing a weight of the span and load bearing beam so that the load bearing beam and span can be stabilized within the vertical guiderails at the first position, the second position or a position in between.
Dependencies are inferred from the claim text.