Closure fasteners – Clamps – Hatch fastener
Patent
1976-03-15
1977-05-03
Moore, Richard E.
Closure fasteners
Clamps
Hatch fastener
105377, E05C 304
Patent
active
040210677
ABSTRACT:
A lock-down mechanism for a hinged hatch cover having a lock strap with an arm portion projecting laterally over a hopper car roof on the side of the hatchway opposite the hatch cover hinge. An operating lever is pivotally mounted at one end on an upstanding support on the car roof and positioned adjacent one side of the arm portion when the hatch cover is closed. A pawl is pivotally mounted on the operating lever and has a foot portion and a latching portion. The foot portion engages the top side of the press-down arm when the locking mechanism is in its closed condition with the hatch cover fully closed. The latching portion of the pawl engages a formation on the lever support when the mechanism is in locking condition, this latter engagement resulting from an over-center or toggle-like action. The pawl has an upstanding portion which may be readily engaged by a trainman's heel to rotate the pawl and thereby trip or unlatch the lock mechanism so as to free the lever for rotation to its open position allowing the hatch cover to be lifted.
REFERENCES:
patent: 1204667 (1916-11-01), King
patent: 2561938 (1951-07-01), Meng et al.
patent: 3804026 (1974-04-01), McNally
patent: 3848912 (1974-11-01), Jensen et al.
Illinois Railway Equipment Company
Moore Richard E.
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