| 摘要 |
An actuator assembly is connectable to a lift arm of an agricultural vehicle to sense whether the lift arm is in a raised or lowered position and thereby responsively disable or enable the flow of agricultural chemicals to a spray head associated with the agricultural vehicle, respectively. The preferred actuator assembly includes a cylindrically-shaped annular support housing adapted to being connected to the lift arm and positioned in a substantially vertical mounting plane. A switch housing disc is nested within said annular support housing and may be turned relative thereto about an axis which is substantially normal to the mounting plane. A gravity-operated switch contained within the switch housing disc and disposed in a switch plane which is substantially perpendicular to said mounting plane for senses whether the lift arm is in its raised and lowered positions and, in response thereto, respectively disables and enables the flow of agricultural chemicals to the spray head associated with the agricultural vehicle. Gravity actuation of the switch is adjustable by selective turning movement of the switch housing disc which thereby angularly adjusts the switch plane in which the switch is disposed. |
