Reverse operation safety circuit
First Claim
1. A control circuit for a lawn tractor having an engine and a power take off driven implement;
- said control circuit comprising;
an inhibit circuit component for preventing operation of a power take off driven implement with the tractor in reverse;
first and second override switches; and
an override circuit component that allows operation of a power take off driven implement while the lawn tractor is in reverse after the first and second override switches are activated by a tractor operator.
1 Assignment
0 Petitions
Accused Products
Abstract
A control circuit for a lawn tractor having an engine and a power take off driven implement. The control circuit includes an inhibit circuit component for preventing operation of a power take off driven implement with the tractor in reverse. Two versions of the inhibit circuit are disclosed, one grounds an engine magneto and a second disables an electric clutch for coupling the power take off to the driven element. The circuit includes first and second override switches and an override circuit component that allows operation of a power take off driven implement while the lawn tractor is in reverse after the first and second override switches are activated in a proper order by a tractor operator.
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Citations
30 Claims
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1. A control circuit for a lawn tractor having an engine and a power take off driven implement;
- said control circuit comprising;
an inhibit circuit component for preventing operation of a power take off driven implement with the tractor in reverse;
first and second override switches; and
an override circuit component that allows operation of a power take off driven implement while the lawn tractor is in reverse after the first and second override switches are activated by a tractor operator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- said control circuit comprising;
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12. A control circuit for a lawn tractor having an engine and a power take off driven implement comprising:
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a) an operator presence switch for detecting the presence of an operator on the lawn and garden tractor;
b) a first override switch for allowing operation of the power take off driven implement when the lawn tractor is in reverse; and
c) an override circuit component coupled to the operator presence switch and the override switch that allows operation of a power take off driven implement while the lawn tractor is in reverse when the override circuit component is in a first state and inhibits operation of the power take off driven implement while the lawn tractor is in reverse when the override circuit component is in a second state;
d) said override circuit also preventing said power take off driven implement from operating when an operator is not sensed as indicated by the operator presence switch. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A control circuit for a lawn tractor having an engine and a power take off driven implement comprising:
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a) a brake switch for detecting engagement of a lawn and garden tractor brake;
b) a first override switch for allowing operation of the power take off driven implement when the lawn tractor is in reverse; and
c) an override circuit component coupled to the brake switch and the override switch that allows operation of a power take off driven implement while the lawn tractor is in reverse when the override circuit component is in a first state and inhibits operation of the power take off driven implement while the lawn tractor is in reverse when the overridecircuit component is in a second state;
d) said override circuit also preventing said power take off driven implement from operating when the garden tractor brake is engaged as indicated by the brake switch. - View Dependent Claims (20, 21, 22)
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23. Apparatus for use with a lawn tractor having an engine and a power take off driven implement;
- said apparatus comprising;
an inhibit circuit component for preventing operation of a power take off driven implement with the tractor in reverse;
an override switch;
an override circuit component that allows operation of a power take off driven implement while the lawn tractor is in reverse after the override switch is activated by a tractor operator; and
a substrate for supporting said inhibit circuit component, said override switch and the override circuit component. - View Dependent Claims (24, 25, 26)
- said apparatus comprising;
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27. A method for use in controlling operation of a lawn tractor having an engine and a power take off driven implement;
- said method comprising;
preventing operation of a power take off driven implement with the tractor in reverse absent an override condition determined by sensing a state of first and second override switches actuatable by a tractor operator;
allowing operation of a power take off driven implement while the lawn tractor is in reverse in an override state after sensing actuation of the first and second override switches by a tractor operator; and
providing a visual indication on the lawn tractor to distinquish between an override and a non override state. - View Dependent Claims (28, 29, 30)
- said method comprising;
Specification