Powered hopper door

Details Powered hopper door Powered hopper door

1980-09-19

1982-11-16

Rolla, Joseph J.

Dispensing

Motor operated outlet element

222310, 222505, 222561, 105282R, B61D 720, B61D 728

Patent

active

043591760

ABSTRACT:
A power actuated closure assembly for controlling the discharge of materials from an opening in the bottom of a hopper, the assembly including a frame having a sliding door support portion with a power actuator support portion extending longitudinally therefrom and supporting a cylinder whose piston rod is coupled to the door by a longitudinal bar which is guided by a fixed guide, the piston rod being connected with the door moving bar by a lost-motion coupling, the guide through which the bar passes having a latch for locking the door and bar in one of several selected positions and the guide also having a longitudinal slot capable of receiving a pin carried by the bar, the pin and slot limiting the movement of the door to a small increment suitable for spreading material over a large area such as a roadway.

REFERENCES:
patent: 1360805 (1920-11-01), Sherman et al.
patent: 1384175 (1921-07-01), Allen et al.
patent: 2227712 (1941-01-01), Hackley
patent: 2303033 (1942-11-01), Elliott
patent: 3066831 (1962-12-01), Thompson
patent: 3252630 (1966-05-01), Berg
patent: 3397654 (1968-08-01), Snyder
patent: 3931934 (1976-01-01), Smith
patent: 4004700 (1977-01-01), Empey
patent: 4051785 (1977-10-01), Bessette
patent: 4248158 (1981-02-01), Chierici et al.

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