| 摘要 |
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.
|
