Interlock circuit for tractor PTO

Details Interlock circuit for tractor PTO Interlock circuit for tractor PTO

1993-01-25

1994-05-24

Tyson, Karin L.

Motor vehicles

Special wheel base

Having only three wheels

180 531, B60K 2810

Patent

active

053140389

ABSTRACT:
An interlock circuit for a vehicle such as a lawn and garden tractor with a switch-controlled PTO and obstacle sensor. The circuit provides engine shutdown and PTO disconnect if a sensor switch is tripped while the vehicle is in reverse. Engine recovery is allowed with the sensor switch tripped if the transmission is shifted out of reverse. If the tactile sensor fails to reset when the vehicle moves forward, the circuit prevents PTO reactivation. Once the sensor resets, the PTO can only be turned on by cycling the PTO switch.

REFERENCES:
patent: 2250754 (1941-07-01), Dooley
patent: 2640898 (1953-06-01), White
patent: 3921004 (1975-11-01), Stark
patent: 4317500 (1982-03-01), Bening
patent: 4337841 (1982-07-01), Law
patent: 4651018 (1987-03-01), Peterson, Jr.
patent: 4688656 (1987-08-01), Kent
patent: 4964485 (1990-10-01), Miele
patent: 4974711 (1990-12-01), Peterson, Jr. et al.

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