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Dive into the research topics where Donald Melvin Haarstad is active.

Publication


Featured researches published by Donald Melvin Haarstad.


Archive | 1988

Steering control unit with flow amplification

Donald Melvin Haarstad


Archive | 1990

Open-center steering control unit with flow amplification

Herman P. Schutten; Dwight Bruce Stephenson; Donald Melvin Haarstad


Archive | 1998

Dynamic load signal fluid controller with instant on flow amplification

Jinbo Wang; Donald Melvin Haarstad


Archive | 1995

Steering control unit with flow amplification for unequal area cylinder

Donald Melvin Haarstad; Timothy Allen Hjelsand; Bernard Julian Larson


Archive | 1989

Steering control unit with both flow amplification and manual steering capability

Donald Melvin Haarstad


Archive | 1987

Fluid controller and dampening fluid path

Donald Melvin Haarstad; Douglas M. Gage


Archive | 1998

Two speed gerotor motor with pressurized recirculation

Donald Melvin Haarstad; Karen J. Radford; Dwight Bruce Stephenson


Archive | 1996

Steering control unit with flow amplification for unequal piston areas

Donald Melvin Haarstad; Timothy Allen Hjelsand; Bernard Julian Larson


Archive | 2001

Gyrotor hydraulic motor

Donald Melvin Haarstad; Gary R. Kassen; Jarett D. Millar; Marvin L. Bernstrom


Archive | 1996

Lenkungssteuereinheit mit Stromverstärkung für ungleiche Kolbenflächen Steering control unit with flow amplification for unequal piston areas

Donald Melvin Haarstad; Timothy Allen Hjelsand; Bernard Julian Larson

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