Automatic hopper gate locking mechanism

Railway rolling stock – Special car bodies – Dumping

Patent

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Details

105308A, 105308E, 105313, B61D 702, B61D 720, B61D 722, B61D 726

Patent

active

039585140

ABSTRACT:
A gravity outlet suitable for hoppers is provided comprising a gate movable back and forth between open and closed positions. A locking shaft is mounted on the gate having handles on at least one side of the outlet and having a locking member preferably hook shaped mounted thereon. A locking lug and a tripping lug are affixed to the pans or frame structure of the outlet. In order to open the gate the locking shaft is rotated to move the locking member to a position out of engagement with the locking lug thus allowing the gate to move outwardly from the pans. As the gate travels towards the open position, the tripping lug trips the locking member into a tripped position where it rides to the open position with the gate. Stops are provided to stop the gate in the full open position. During closing of the gate, a cam surface on the locking member travels up the locking lug and then the locking member drops into the locked position automatically to maintain the gate in a closed and locked position. In one embodiment a pinion shaft having pinions thereon and at least one door bearing are affixed to the gate which carry the gate along a fixed rack. In another embodiment a rack is affixed to the gate which is driven by a rotatable but longitudinally fixed pinion and pinion shaft. In accordance with another embodiment of the present invention, the locking shaft is movable into an overcenter position to provide further assurance to maintain the gate in the closed position. In another embodiment a transversely extending elastomeric seal is affixed either to the gate pan or to the gate. In one embodiment the elastomeric seal maintains contact with the gate regardless of the gate position to facilitate sealing during unloading. In another embodiment the elastomeric seal is in contact with the gate pan only in the closed position. In accordance with another embodiment at the front of the gate, gate guides are provided to insure that the gate assumes and maintains a closed position in engagement with the front pan.

REFERENCES:
patent: 2638060 (1953-05-01), Dorey
patent: 2993452 (1961-07-01), Dorey
patent: 3035530 (1962-05-01), Meyers et al.
patent: 3396675 (1968-08-01), Stevens
patent: 3532062 (1970-10-01), Pulcrano
patent: 3536013 (1970-10-01), Nagy
patent: 3596611 (1971-08-01), Floehr
patent: 3707126 (1972-12-01), Nester
patent: 3877392 (1975-04-01), Akester et al.
patent: 3877392 (1975-04-01), Akester et al.

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