Hatch cover for railroad hopper cars

Details Hatch cover for railroad hopper cars Hatch cover for railroad hopper cars

1981-01-28

1983-01-18

Peters, Jr., Joseph F.

Railway rolling stock

Special car bodies

Freight

49501, 114201R, 220 72, 296210, 296216, B61D 39000

Patent

active

043686745

ABSTRACT:
A hatch cover for railroad hopper cars and a method of constructing same. The hatch cover includes a main panel and a stepped periphery, both of which are constructed of polyester resin impregnated with glass fiber reinforcement. Stiffening ribs on the panel include a honeycomb core enclosed by a rigid shell formed by glass fiber reinforced resin. The entire periphery of the panel is strengthened by thickening it, and the areas to which the hinges are attached is thickened additionally. The hatch cover is constructed by applying an exterior protective coating to a mold surface, spraying resin and chopped glass fibers into the mold, inserting the honeycomb core portions of the ribs into the mold in a crossing pattern, and spraying additional resin and glass fibers onto the honeycomb to form the shell which encloses the core of each rib.

REFERENCES:
patent: 3796168 (1974-03-01), Zeller
patent: 4040363 (1977-08-01), Walk et al.
patent: 4132042 (1979-01-01), Di Maio
patent: 4239008 (1980-12-01), Conlon
patent: 4245565 (1981-01-01), Stark et al.
patent: 4294055 (1981-10-01), Andresen
patent: 4307670 (1981-12-01), Nadherny

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