Douglas W. Koehler

Person

Naperville, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Hydraulic system and method for control
- Patent number 8,631,650
- Issue date Jan 21, 2014
- Caterpillar Inc.
- Michael T. Verkuilen
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Coolant flow control system and method
- Patent number 8,171,895
- Issue date May 8, 2012
- Caterpillar Inc.
- Chris J. Scolton
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Hystat transmission having pressure override control
- Patent number 7,926,267
- Issue date Apr 19, 2011
- Caterpillar Inc.
- Douglas W. Koehler
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
System and method of pressure compensation for electro hydraulic co...
- Patent number 6,609,369
- Issue date Aug 26, 2003
- Caterpillar Inc.
- Douglas W. Koehler
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Hydraulic control system for improving pump response and dynamic ma...
- Patent number 6,446,433
- Issue date Sep 10, 2002
- Caterpillar Inc.
- Bradford J. Holt
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
System and method for calibrating a independent metering valve
- Patent number 6,357,276
- Issue date Mar 19, 2002
- Caterpillar Inc.
- Douglas W. Koehler
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Method and apparatus for controlling the actuation of a hydraulic c...
- Patent number 6,257,118
- Issue date Jul 10, 2001
- Caterpillar Inc.
- R. Carl Wilbur
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Off-setting rate of pressure rise in a fluid system
- Patent number 6,199,378
- Issue date Mar 13, 2001
- Caterpillar Inc.
- James A. Aardema
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Method and apparatus for controlling a bypass valve of a fluid circuit
- Patent number 6,173,572
- Issue date Jan 16, 2001
- Caterpillar Inc.
- Michael A. Cobo
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
System and method for controlling an independent metering valve
- Patent number 5,960,695
- Issue date Oct 5, 1999
- Caterpillar Inc.
- James A. Aardema
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
System and method for controlling an independent metering valve
- Patent number 5,947,140
- Issue date Sep 7, 1999
- Caterpillar Inc.
- James A. Aardema
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Tilt priority scheme for a control system
- Patent number 5,678,470
- Issue date Oct 21, 1997
- Caterpillar Inc.
- Douglas W. Koehler
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Control system for a hydraulic circuit
- Patent number 5,664,477
- Issue date Sep 9, 1997
- Caterpillar Inc.
- Douglas W. Koehler
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
HYDRAULIC SYSTEM AND METHOD FOR CONTROL
- Publication number 20110072809
- Publication date Mar 31, 2011
- Caterpillar Inc.
- Michael Todd Verkuilen
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Application
COOLANT FLOW CONTROL SYSTEM AND METHOD
- Publication number 20100154730
- Publication date Jun 24, 2010
- Caterpillar Inc.
- Chris J. Scolton
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Hystat transmission having pressure override control
- Publication number 20090235655
- Publication date Sep 24, 2009
- Caterpillar Inc.
- Douglas W. Koehler
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
SYSTEM AND METHOD OF PRESSURE COMPENSATION FOR ELECTRO HYDRAULIC CO...
- Publication number 20030097925
- Publication date May 29, 2003
- Douglas W. Koehler
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Douglas W. Koehler

Person

Patents Grantslast 30 patents

Hydraulic system and method for control

Coolant flow control system and method

Hystat transmission having pressure override control

System and method of pressure compensation for electro hydraulic co...

Hydraulic control system for improving pump response and dynamic ma...

System and method for calibrating a independent metering valve

Method and apparatus for controlling the actuation of a hydraulic c...

Off-setting rate of pressure rise in a fluid system

Method and apparatus for controlling a bypass valve of a fluid circuit

System and method for controlling an independent metering valve

System and method for controlling an independent metering valve

Tilt priority scheme for a control system

Control system for a hydraulic circuit

Patents Applicationslast 30 patents

HYDRAULIC SYSTEM AND METHOD FOR CONTROL

COOLANT FLOW CONTROL SYSTEM AND METHOD

Hystat transmission having pressure override control

SYSTEM AND METHOD OF PRESSURE COMPENSATION FOR ELECTRO HYDRAULIC CO...