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John D Duffy

Caterpillar Inc.

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Publication

Featured researches published by John D Duffy.

Archive | 1996

Method and apparatus for controlling an implement of a work machine

Cynthia M Gardner; Robert E. Stone; John D Duffy; William E. Allen; James E Schimpf

Archive | 1999

Method and apparatus for controlling the actuation of a hydraulic cylinder

R. Carl Wilbur; John D Duffy; Douglas W. Koehler

Archive | 1997

Apparatus and method for preventing underdigging of a work machine

Lee R. Denbraber; John D Duffy; Mark R. Hawkins; Steven J. Zmuda

Archive | 1998

Method and device for controlling tool of earth-moving machine

William E. Allen; John D Duffy; Cynthia M Gardner; James E Schimpf; Robert E. Stone; イー アレン ウィリアム; エフ シー シムプ ジェームズ; ディー ダフィー ジョン; エム ガードナー シンシア; イー ストーン ロバート

Archive | 1997

Verfahren und Vorrichtung zur Steuerung eines Werkzeuges einer Arbeitsmaschine

William E. Allen; John D Duffy; Cinthia M Gardner; James F Schimpf; Robert E. Stone

Archive | 2000

Control of the piston movement in a hydraulic cylinder by use of an electro-hydraulic controller in turn commanded by an electronic controller that has input from position sensor, operator commands and limiting piston speed values

R. Carl Wilbur; John D Duffy; Douglas W. Koehler

Archive | 2000

Verfahren und Vorrichtung zur Steuerung der Betätigung eines Hydraulikzylinders

John D Duffy; Douglas W. Peoria Koehler; R. Carl Wilbur

Archive | 1997

Method and apparatus for controlling a tool of a construction machine

Cynthia M Gardner; John D Duffy; James E Schimpf; Robert E. Stone; William E. Allen

Archive | 1997

Verfahren und Vorrichtung zur Steuerung eines Werkzeuges einer Arbeitsmaschine Method and apparatus for controlling a machine tool of a working

Cinthia M Gardner; Robert E. Stone; John D Duffy; William E. Allen; James F Schimpf

Archive | 1997

Method and device for controlling a tool of a working machine

Cinthia M Gardner; Robert E. Stone; John D Duffy; William E. Allen; James F Schimpf

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Robert E. Stone

Caterpillar Inc.

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William E. Allen

Caterpillar Inc.

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Cynthia M Gardner

Caterpillar Inc.

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Cinthia M Gardner

Caterpillar Inc.

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James F Schimpf

Caterpillar Inc.

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R. Carl Wilbur

Caterpillar Inc.

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Douglas W. Koehler

Caterpillar Inc.

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Lee R. Denbraber

Caterpillar Inc.

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Mark R. Hawkins

Caterpillar Inc.

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Steven J. Zmuda

Caterpillar Inc.

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