Unloading valve for hopper car

Details Unloading valve for hopper car Unloading valve for hopper car

1993-02-26

1994-12-27

Elkins, Gary E.

Receptacles

Closures

Having means for securing or retaining closure in its closed...

220347, 215231, 215284, 138 89, 285312, 285901, 406145, B65D 4516

Patent

active

053757300

ABSTRACT:
An unloading valve for hopper cars used for transporting dry fluent material such as carbon black. An unloading pipe extends outwardly from the bottom of the hopper, and a closure removably attaches at the end of the pipe. The closure includes a plug extending within the pipe and presenting a surface that confronts the dry fluent material adjacent the inner end of the pipe. This surface has an angle selected to cause fluent material loaded into the hopper to become packed at the inner end of the pipe during loading and subsequent shipment of the hopper car. When the closure is removed for attaching an unloading conduit to the pipe, the packed material at the inner end of the pipe prevents any of that material from leaking out the pipe before the unloading conduit can be connected.

REFERENCES:
patent: 3020092 (1962-02-01), Dorey
patent: 3079032 (1963-02-01), Dorey
patent: 3177042 (1965-04-01), Borger et al.
patent: 3195961 (1965-07-01), Borger
patent: 3439942 (1969-04-01), Moore et al.
patent: 3572844 (1971-03-01), Mundinger
patent: 3672403 (1972-06-01), Wilson et al.
patent: 3700143 (1972-10-01), Shaver
patent: 4802694 (1989-02-01), Vargo
patent: 4975000 (1990-12-01), Fritz
patent: 5000358 (1991-03-01), Dugge
patent: 5078291 (1992-01-01), Gilmour

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