Abstract: An exhaust system for a vehicle includes a valve including a valving element movable to a first position upon movement of a portion of the vehicle body to a raised position, whereby exhaust from the vehicle engine is directed to a muffler, while with the portion of the vehicle body in a lowered position and with the valving element moved to a second position, the engine exhaust is directed partially through the muffler, and partially through a member of the body portion. An over-center spring is connected to the valving element to bias it towards its first and second positions whereas a plunger is connected to the valving element to move it to its second position in response to lowering of the vehicle body.

Abstract: Apparatus for controlling the operation of dump doors of a wagon or the like, permitting the operator to set a control lever selectively in a closed or open position, with the apparatus effecting the desired selective movement of the doors and returning the control lever to a "Hold" position upon completion of the desired movement. The apparatus includes a cam device responsive to the movement of the doors to the selected position for releasing the control lever and thereby terminating the driving of the doors to the selected position. The apparatus alternatively may provide a single full movement of the doors or a sequential movement, as desired.