Inventor
Douglas W. Koehler
Inventor
Peoria, IL, US
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F15Bprimary
F15BSystems acting by means of fluids in general42%
E02FDredging21%
Y10TTechnical subjects covered by former us classification17%
F01PCooling of machines or engines in general4%
F04BPositive-displacement machines for liquids4%
F16DCouplings for transmitting rotation4%
F16HGearing4%
G05BControl or regulating systems in general4%
PatentTitleYear
8,631,650'Hydraulic system and method for control'20148,171,895'Coolant flow control system and method'20127,926,267'Hystat transmission having pressure override control'20116,609,369'System and method of pressure compensation for electro hydraulic control systems'20036,446,433'Hydraulic control system for improving pump response and dynamic matching of pump and valve'20026,357,276'System and method for calibrating a independent metering valve'20026,257,118'Method and apparatus for controlling the actuation of a hydraulic cylinder'20016,199,378'Off-setting rate of pressure rise in a fluid system'20016,173,572'Method and apparatus for controlling a bypass valve of a fluid circuit'20015,960,695'System and method for controlling an independent metering valve'19995,947,140'System and method for controlling an independent metering valve'19995,878,363'Control to improve dump while lifting'19995,678,470'Tilt priority scheme for a control system'19975,664,477'Control system for a hydraulic circuit'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–2014Patents assigned to CATERPILLAR INC (14)· patent assignee history
1997–2001Based in Naperville, IL, US· patent location history
2001–2014Based in Peoria, IL, US· patent location history
2012–2014Patents assigned to KOEHLER DOUGLAS W (2)· patent assignee history
2012Patents assigned to SCOLTON CHRIS J (1)· patent assignee history
2014Patents assigned to AARDEMA JAMES A (1)· patent assignee history
2014Patents assigned to KRONE JOHN J (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CATERPILLAR INC | 14 | 1997–2014 |
| KOEHLER DOUGLAS Wself | 2 | 2012–2014 |
| AARDEMA JAMES A | 1 | 2014 |
| KRONE JOHN J | 1 | 2014 |
| SCOLTON CHRIS J | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Peoria, Illinois, US | 8 | 2001–2014 |
| Naperville, Illinois, US | 6 | 1997–2001 |