Caterpillar Inc.

David G Surridge

Thomas L Howard

Alan A Davidovich

Gary C Bryant

David G Kupper

Michael Anthony Calamari

Dana D Branham

Allen F Boyer

Michael E Green

Marc D Gibson

D Wynne Smith

R Mark Ginn

Mark W Vannette

Sydney K Scott

A fan assembly for a work machine includes a fan housing which has a fan guard and a fan shroud defined therein. The fan housing includes a rotationally molded, hollow exterior shell structure. The exterior shell structure is filled with a filler material so as to enhance the structural rigidity and stiffness of the fan housing. The fan assembly of the present invention utilizes fewer components relative to fan assemblies which have heretofore been designed thereby decreasing costs and assembly time associated with the work machine.

Fan assembly including a fan guard having a void with an interior filler

Wheel loader exterior

A lock assembly for locking a control lever in a neutral or non-active position includes a lock mechanism having a locking pin and a locking bracket for receiving the locking pin. The locking bracket is secured to the control lever and prevents the lever from moving when the locking pin is engaged with the bracket. The control lever controls a work function of a work machine and the lock assembly prevents unintentional activation of the control lever.

Control lever lock assembly

A non-metallic roof for a work machine includes a rotationally molded plastic structure which encloses and seals the top portion of an operator's station of the work machine. The roof includes grab rails and light sockets which are integrally molded into the structure. A plurality of metallic bars and cooperating threaded fasteners connect the roof to the operator's station. A closed cell foam material seals the juncture between the roof and the top portion of the operator's station.

Non-Metalic roof for a work machine

A pilot hydraulic system controller including a pilot controller valve for controlling the flow of hydraulic fluid to actuate a primary hydraulic system valve, a pilot controller lockout valve, and a detent control circuit for selectively energizing a detent solenoid coil connected to said pilot controller valve, the detent control circuit include a switch means for selectively disabling the detent solenoid coil when the pilot controller lockout valve is actuated to hydraulically disable the pilot controller, so as to prevent the detent solenoid coil from acting upon the pilot controller valve when the pilot controller is hydraulically disabled.

Apparatus for controlling selectively engageable detents in a pilot

Wheel loader vehicle

Growing community of inventors

Knightdale, NC, United States of America

David G Surridge