Donald M. Haarstad

Person

Chaska, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Two speed gerotor motor with pressurized recirculation
- Patent number 6,068,460
- Issue date May 30, 2000
- Eaton Corporation
- Donald M. Haarstad
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Dynamic load signal fluid controller with instant on flow amplifica...
- Patent number 5,819,532
- Issue date Oct 13, 1998
- Eaton Corporation
- Jinbo Wang
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Steering control unit with flow amplification for unequal area cyli...
- Patent number 5,638,864
- Issue date Jun 17, 1997
- Eaton Corporation
- Donald M. Haarstad
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Open-center steering control unit with flow amplification
- Patent number RE34746
- Issue date Oct 4, 1994
- Eaton Corporation
- Herman P. Schutten
- 060 - Power plants
Information Patent Grant
Open-center steering control unit with flow amplification
- Patent number 4,958,493
- Issue date Sep 25, 1990
- Eaton Corporation
- Herman P. Schutten
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Steering control unit with both flow amplification and manual steer...
- Patent number 4,862,690
- Issue date Sep 5, 1989
- Eaton Corporation
- Donald M. Haarstad
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Fluid controller and dampening fluid path
- Patent number 4,781,219
- Issue date Nov 1, 1988
- Eaton Corporation
- Donald M. Haarstad
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Steering control unit with flow amplification
- Patent number 4,759,182
- Issue date Jul 26, 1988
- Eaton Corporation
- Donald M. Haarstad
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Donald M. Haarstad

Person

Patents Grantslast 30 patents

Two speed gerotor motor with pressurized recirculation

Dynamic load signal fluid controller with instant on flow amplifica...

Steering control unit with flow amplification for unequal area cyli...

Open-center steering control unit with flow amplification

Open-center steering control unit with flow amplification

Steering control unit with both flow amplification and manual steer...

Fluid controller and dampening fluid path

Steering control unit with flow amplification