Motor vehicles – With means for promoting safety of vehicle – its occupant or... – Responsive to absence or inattention of operator – or...
Patent
1998-10-09
2000-10-24
English, Peter C.
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
Responsive to absence or inattention of operator, or...
180269, 701 50, B60K 2804, B60R 2100
Patent
active
061352306
ABSTRACT:
An interlock control system for controlling certain operations of a work machine wherein such system includes a first switch coupled to an operator restraint mechanism, a second switch coupled to the operator seat, a third switch operable to control the operation of the parking brake mechanism, and an electronic controller coupled to all three switches for receiving signals therefrom, the controller outputting a signal to enable the drive mechanism and the implement control system when the controller receives signals from the first, second and third switches indicative of the fact that the operator is present in the seat, the operator restraint mechanism is positioned in its restraining position, and the parking brake switch has been actuated to release the parking brake. With the drive mechanism and implement control system enabled, a second activation of the parking brake switch will disable the drive mechanism and set the parking brake, but it will not disable the implement control system. In addition, regardless of the particular operating mode, as soon as the interlock controller senses that either the operator restraint mechanism has been moved out of its restraining position and/or the operator is no longer present in the seat, the controller will disable the drive mechanism and the implement control system, and it will apply the parking brake.
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Schenck Raymond T.
Swick W. Chris
Ufheil Steven T.
Waitt Reid W.
Caterpillar S.A.R.L.
English Peter C.
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