Interlock circuit for utility vehicle park brake
AssigneeDeere & Company
InventorsDarren D. Deblack, Stephan R. Hayden
Life of this patent
Estimating the term…
Abstract
An interlock circuit for a utility vehicle park brake includes a relay connected to neutral switch on a transmission. The relay is actuated by electric current to move a contact to a closed position if the neutral switch is out of neutral. A throttle pedal switch connected to the relay moves a contact to a closed position if the throttle pedal is depressed. A park brake switch connected to the throttle pedal switch moves a contact to a closed position if the park brake is engaged. Closing all of the contacts grounds an ignition circuit connected to the interlock circuit, which may be a magneto ignition circuit.
Claims8
An interlock circuit for a utility vehicle park brake, comprising:
- a normally open neutral switch moving to a closed position if a transmission of the utility vehicle is in neutral;
- a park brake interlock relay connected to the neutral switch and moving to a closed position if the neutral switch is open;
- a normally open throttle pedal switch connected to the park brake interlock relay and moving to a closed position if a throttle pedal is depressed;
- a normally open park brake switch connected to the throttle pedal switch and moving to a closed position if the park brake is engaged;
- and
- the park brake switch connected to an ignition circuit that provides a high voltage to a spark plug unless the ignition circuit is grounded because the park brake switch, the throttle pedal switch and the park brake interlock relay are all closed.
An interlock circuit for a utility vehicle park brake, comprising:
- a park brake switch connected to a throttle pedal switch connected to a park brake interlock relay;
- the park brake switch, throttle pedal switch and park brake interlock relay grounding a magneto ignition circuit if the relay and switches are all closed;
- the interlock relay being closed by placing a transmission in neutral.
An interlock circuit for a utility vehicle park brake, comprising:
- a relay connected to a neutral switch on a transmission;
- the relay actuated by electric current to move a contact to a closed position if the neutral switch is out of neutral;
- a throttle pedal switch connected to the relay and moving a contact to a closed position if the throttle pedal is depressed;
- a park brake switch connected to the throttle pedal switch and moving a contact to a closed position if the park brake is engaged;
- the closing of all of the contacts grounding an ignition circuit.
Dependencies are inferred from the claim text.