Navistar International Transportation Corporation

Robert L Dowler

John M Ammer

W Thomas Irick

Richard L Malecki

Patrick J Murphy

A fire truck cooling system allows for precooling of hot water from the vehicle engine prior to receipt of same by the vehicle radiator. The system includes a precooler which is provided with cooling water either from an onboard water tank when the vehicle is racing to a fire or from a fire hydrant when pumping water at the scene of the fire. A control system comprising pressure switches, a shuttle valve, and a directional control valve allows the precooler to operate on tank water and to automatically switch to hydrant water when such is made available by the main fire control water pump of the vehicle.

Fire truck cooling system

A feedthrough sleeve and integral support fitting comprises a hollow tubular sleeve and integral planar mounting collar. The sleeve lies in a plane transverse to the plane of the collar which is less than perpendicular thereto. The collar is configured to be engaged in a snap fit manner within an opening in a surface, such as a bulkhead of a truck, with the sleeve being mounted in a manner to allow an elongated member, such as a hose, wire or tubing, to be fed therethrough from one side of the bulkhead to the other, without requiring the need for splicing of or creating a joint in the elongated member to provide feedthrough thereof.

Feedthrough sleeve and integral support fitting

A system for alerting the operator of a vehicle to potentially damaging motoring of the engine before such motoring actually occurs so that corrective action can be taken. A speed sensor senses rotational speed of the counter/input shaft of a manual transmission and operates an indicator that presents the alert to the driver. The alert is given with the clutch disengaged as soon as the transmission is placed in a gear that causes the counter/input shaft to operate at a speed that will cause potentially damaging motoring of the engine. Because the alert is given before the clutch is re-engaged, an opportunity is given to prevent the potentially damaging motoring.

Engine overspeed sensing and readout

A fuel feed line having a swivel supported horizontal pick-up tube to draw fuel from the fuel tank where the fuel is of maximum depth. The depth of fuel in the tank may vary due to gravitational or centrifugal forces acting on the fuel.

Growing community of inventors

New Haven, IN, United States of America

Robert L Dowler