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US 4,543,889 AGranted
Hatch cover seal assembly
AssigneeDev-Mark, Inc.
InventorWilliam E. Fritz
Life of this patent
Estimating the term…
Abstract
A cover for hopper car hatch openings as provided by railroad car and freight handling equipment. Each hatch opening is provided with a peripherial seal located out of and beneath the hatch opening and a pressure releasing latch for securing the cover against the seal and locking the cover upon the hatch openings.
Claims4
A cover and seal assembly for a hatch opening of a hopper car and the like comprising;
- (a) a collar defining the hatch opening and providing an annular peripherial flared ring extending in an outwardly and downwardly direction with respect to said collar,
- (b) a cover for the hatch opening including a depending peripheral flange adapted to overlay in spaced relation said flared ring of said collar,
- (c) an annular gasket retainer mounted on the exterior of said collar below and in spaced relation to said flared ring so as to provide therebetween a gasket receiving area and,
- (d) a stretchable ring gasket having an inner diameter less than the outer diameter of said flared ring of said collar and adapted to be snapped over said flared ring into said gasket receiving area so as to be held between said flared ring and said flange with its outer peripherial edge normally disposed beyond said flared ring and in the path of movement of said flange of said cover when said cover is moved into an overlying position with respect to said flared ring so as to be deflected into a hatch sealing position between said gasket retainer and said flange of said cover.
1 more element
Dependencies are inferred from the claim text.