Patent ID: 7266938
Filing Date: 2007-09-11
Classification: A01D

Abstract:
1. In an apparatus having an output device with an operational status, a transmission including an input driven by a prime mover and a shaft driven by the input, a circuit for controlling the operational status of the vehicle output device depending on a rotational direction of the driven shaft, the circuit comprising: a user actuated switch responsive to user input; a position sensing switch positioned to detect the rotational direction of the driven shaft, the position sensing switch being actuated when the driven shaft rotates in one of a forward direction and a reverse direction; a first relay having an input and an output, the first relay input coupled to the position sensing switch, the first relay being actuated responsive to actuation of the position sensing switch; a handle switch actuated responsive to a control input; a time delay unit having an input coupled to the handle switch and an output, the time delay unit providing a delayed control signal over the output when at least one condition does not occur during a predetermined delay period, the delayed control signal being provided responsive to actuation of the handle switch; a second relay having an input and an output, the second relay input coupled to the output of the time delay unit, the second relay being actuated responsive to the delayed control signal; and a latching relay having a first control input, a second control input, and an output, the first control input coupled to the first relay output, the second control input coupled to the second relay output, the latching relay output coupled to the output device, the latching relay controlling the operational status of the output device between an engaged state and a disengaged state responsive to actuation of the second relay, and responsive to actuation of the first relay.