Hopper door closure

Details Hopper door closure Hopper door closure

1989-09-11

1991-08-13

Huppert, Michael S.

Dispensing

Motor operated outlet element

222561, 1052821, 1052823, 105286, B67D 300, B67D 506

Patent

active

050389661

ABSTRACT:
A hopper which contains loose material, and a door and frame assembly for attachment to the bottom of the hopper, for controlling the flow of the loose material therefrom. The assembly includes a door frame formed of spaced side and end walls, and a cross-piece which, with the side walls and one of the end walls, defines a hopper outlet opening. A door is slidably mounted to the frame so as to be across the outlet opening when in a closed position and to be clear of the opening when in an open position. A door moving device is provided for sliding the door, with respect to the opening, between the closed position and the open position. The frame particularly includes structure for attaching a plurality of different types of door moving devices, including air or hydraulic cylinder arrangements, or rack-and-pinion arrangements operated by an electric motor, or by hand or by means of a chain or cable.

REFERENCES:
patent: 4342267 (1982-08-01), Blout
patent: 4359176 (1982-11-01), Johnson

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