초록

A trough hatch cover for a covered railway hopper car including an easily replaceable longitudinally convergently tapered elastomeric seal reactive therewith to form a weather-tight seal about the periphery of the hatch when secured by clamps at opposite ends of the hatch cover.

대표청구항 ▼

For use with a hatch having a generally planar lip and a flexible hatch cover with a perimeter portion designed to cooperate with said lip along a seating area to close the hatch, and latching means capable of exerting positive latching force on said hatch cover, an improved sealing arrangement comp

For use with a hatch having a generally planar lip and a flexible hatch cover with a perimeter portion designed to cooperate with said lip along a seating area to close the hatch, and latching means capable of exerting positive latching force on said hatch cover, an improved sealing arrangement comprising: an internally reinforced elastomeric seal adapted to be interpositioned along the seating area between said lip and a perimeter portion of said hatch cover, said seal having upper and lower surfaces adapted to mate with said hatch cover perimeter portion and said lip, respectively, and the inner and outer external surfaces of said seal accommodating lateral flow of said seal, said seal being connected to one of said hatch cover perimeter portion and said lip and having a tapered thickness, the thickest portion of which is located between said latching means and the thickness of the seal progressively decreasing toward the latching means, and said seal being compressed into a weather-tight relationship with said hatch cover and said lip upon securing the latching means thereby obtaining deflection of said hatch cover and attendant proportional deflection and lateral flow of said seal, said hatch cover thereby substantially conforming with said seal.