초록 ▼

A vented hatch coaming for a covered hopper car permits unloading without opening the hatch cover. The vented hatch includes an opening in the coaming for the passage of air. Preferably, a housing is positioned adjacent the ring opening to exclude contaminants and, where extraordinary sanitation is

A vented hatch coaming for a covered hopper car permits unloading without opening the hatch cover. The vented hatch includes an opening in the coaming for the passage of air. Preferably, a housing is positioned adjacent the ring opening to exclude contaminants and, where extraordinary sanitation is required, a filter element.

대표청구항 ▼

[ What is claimed is:] [1.] In a covered hopper car, a vented hatch assembly comprising:a hatch coaming;one or more openings in the side of the coaming for enabling the passage of air into the interior of the hopper car at sufficient flow rates to permit unloading of the car without opening any hatc

[ What is claimed is:] [1.] In a covered hopper car, a vented hatch assembly comprising:a hatch coaming;one or more openings in the side of the coaming for enabling the passage of air into the interior of the hopper car at sufficient flow rates to permit unloading of the car without opening any hatch cover;a housing positioned external to the coaming opening and in communication therewith, wherein the housing defines at least one opening for the passage of air into the housing; anda filter element disposed such that air passing through the housing opening into the housing passes through the filter and through the coaming opening into the interior of the hopper car.