Trap closure device for trailer hoppers

Details Trap closure device for trailer hoppers Trap closure device for trailer hoppers

1998-06-16

2000-07-11

Shaver, Kevin

Dispensing

With flow controller or closure

Reciprocatory

222504, B65D 4700

Patent

active

060859482

ABSTRACT:
A trap closure device for opening and closing a discharge opening of a hopper on a trailer or vehicle. The closure device includes a generally rectangular frame assembly which supports a horizontally sliding door assembly on plastic type rollers as the door travels to open and close the discharge opening at one end of the frame assembly. An operating shaft assembly is supported above the sliding door assembly near the other end of the frame assembly to provide increased ground clearance. The door assembly has a slightly inclined top surface that opens away from the discharge opening and thus reduces friction when opening the device. The shaft assembly includes a single shaft attached to front and rear straps that forcibly pull open the door assembly when the shaft is rotated in one direction and forcibly pull close the door assembly when the shaft is rotated in the opposite direction.

REFERENCES:
patent: 2544117 (1951-03-01), Weatherly
patent: 2690352 (1954-09-01), Turner
patent: 2859888 (1958-11-01), Fairnington
patent: 3241730 (1966-03-01), Dorey
patent: 3262610 (1966-07-01), Jordan
patent: 3433178 (1969-03-01), Floehr
patent: 3826203 (1974-07-01), Martin et al.
patent: 3958515 (1976-03-01), Goudy
patent: 3997089 (1976-12-01), Clarke et al.
patent: 4055265 (1977-10-01), Eisenman
patent: 4193159 (1980-03-01), Beard, III
patent: 5038966 (1991-08-01), Olk

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