Caterpillar Inc.

Michael Anthony Calamari

J Roger Watson

Paul D Fuller

Bhikhubhai S Mistry

Dante T Thomas

Thomas L Howard

Michael Scott Sekulich

Alan A Davidovich

David G Surridge

Xiaoming Tan

Bradley Robert Lancaster

A tool coupler for use in coupling a tool to a machine may have a frame with a first end receivable within the tool and a second end located opposite the first end. The tool coupler may also have a hydraulic cylinder pinned to the second end of the frame, and a wedge member pivotally connected to the hydraulic cylinder and configured to pass through the second end of the frame and selectively engage the tool. Engagement of the wedge member with the tool may inhibit disconnect of the first end of the frame from the tool.

Tool coupler having compact locking configuration

An electronic engine speed control system is used on a work machine utilizing an engine with a governor control movable between a plurality of positions. The governor control is operated by an operator so that a desired engine speed may be selected for driving a plurality of wheels through a transmission. The transmission is specifically controlled to obtain a desired ground speed independent of the selected engine speed. The engine speed control system includes an electronic control module. An operator switch is connected to the control module and is movable to a set position which sends an input signal with a desired engine speed value corresponding to a selected engine speed to the control module. An engine sensor is connectable between the engine and the control module for sensing the speed of the engine and sending an input signal with an actual engine speed value to the control module. An actuator is connected between the control module and the governor control and responsive to a control signal from the control module for moving the governor control to any one of the plurality of positions. The control signal is delivered to the actuator as a function of the desired and actual values so that the engine speed is electronically set and maintained at the selected engine speed independent from the ground speed of the work machine.

Electronic engine speed controller

An electronic engine speed control system is used on a work machine utilizing an engine with a governor control movable between a plurality of positions. The governor control is operated by an operator so that a desired engine speed may be selected for driving a plurality of wheels through a transmission. The transmission is specifically controlled to obtain a desired ground speed independent of the selected engine speed. The engine speed control system includes an electronic control module. An operator switch is connected to the control module and is movable to a set position which sends an input signal with a desired engine speed value corresponding to a selected engine speed to the control module. An engine sensor is connectable between the engine and the control module for sensing the speed of the engine and sending an input signal with an actual engine speed value to the control module. An actuator is connected between the control module and the governor control and responsive to a control signal from the control module for moving the governor control to any one of the plurality of positions. The control signal is delivered to the actuator as a function of the desired and actual values so that the engine speed is electronically set and maintained at the selected engine speed.

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.

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Raleigh, NC, United States of America

Michael Anthony Calamari