Interlock circuit for utility vehicle park brake
First Claim
Patent Images
1. 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.
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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.
31 Citations
8 Claims
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1. An interlock circuit for a utility vehicle park brake, comprising:
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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. - View Dependent Claims (2, 3)
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4. 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.- View Dependent Claims (5)
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6. An interlock circuit for a utility vehicle park brake, comprising:
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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. - View Dependent Claims (7, 8)
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Specification