Derek M Eagles

6371158, Apr 16, 2002

Oct 3, 2000

09/678037

Yifei Raymond Hou - Waterloo IA
Derek Malcolm Eagles - Cedar Falls IA

Deere Company - Moline IL

F17D 100

13756537, 137561 A, 137590, 60487

A hydraulic system having a standpipe in a sump with ports on the side of the standpipe and one smaller port on the top of the standpipe. The majority of the oil flows into the standpipe through the side ports thereby reducing the downward suction and flow at the top of the standpipe to eliminate the formation of a vortex at the top of the standpipe. As a result, less air is drawn into the oil producing a more consistent oil/air mixture and more consistent sump oil level.

7142968, Nov 28, 2006

Aug 3, 2004

10/910324

William Guy Alexander - Waterloo IA, US
Thomas Eugene Boe - Cedar Falls IA, US
Derek Malcolm Eagles - Cedar Falls IA, US
Jianming Yu - Cedar Rapids IA, US

Deere & Company - Moline IL

A01B 63/112
G06F 19/00

701 50, 701 1, 701 36, 702 85, 172 8

A method is provided for automatically determining a hitch raise rate calibration value for a hitch control system having a hydraulic actuator for moving the hitch, a valve for controlling flow of hydraulic fluid to the actuator and an electronic hitch control unit. The method includes applying a first control signal to the valve to cause the hitch to raise, determining a first hitch velocity as the hitch moves in response to the first control signal, and repeating these steps for a second control signal. The raise rate calibration value is then calculated as a function of a desired raise velocity, the first and second control signals and the first and second velocities.

7458428, Dec 2, 2008

Feb 7, 2006

11/348867

Gregory Joseph Laudick - Cedar Falls IA, US
Derek Malcolm Eagles - Cedar Falls IA, US
William Guy Alexander - Waterloo IA, US
Jeffrey David Dawson - Cedar Falls IA, US
Thomas Eugene Boe - Cedar Falls IA, US

Deere & Company - Moline IL

A01B 79/00
E02F 3/76

172 1, 172 45

A towed scraper control system automatically lowers the scraper blade to a working position at the start of a scraping operation according to a certain method. The method includes sensing a ground speed of the vehicle and sensing a draft force applied by the scraper to the vehicle. With the vehicle pulling the scraper at or near a target ground speed over terrain with the blade positioned above a surface of the ground, the blade is automatically lowered with respect to the scraper frame at a first rate until the blade begins to engage the surface of the ground. Thereafter, while the vehicle continues to move forward at or near the target ground speed, the blade is lowered with respect to the frame at a second rate and for a duration related to the sensed ground speed so that lowering of the blade stops when the scraper wheel begins to enter a cut produced by the blade. With the blade fixed with respect to the scraper frame, the scraper is moved forward at the target ground speed for a distance determined as a function of the sensed draft force. Thereafter, the blade is raised with respect to the frame at a rate which matches a lowering rate of the wheels as they descend along the cut, and the blade is raised at this matching rate until the position of the blade matches the position of the blade after the first lowering step.

20100096576, Apr 22, 2010

Oct 22, 2008

12/256190

Mark Sommer - Cedar Falls IA, US
Phil Roe - Eldora IA, US
Derek Eagles - Cedar Falls IA, US
Paul Seeber - Hudson IA, US

F16K 31/02

25112915

A valve control unit is connected to a control valve and automatically moves a valve spool first and second bleed positions. The control unit prevents valve bleed if the control valve is in its extend or retract position under command of the operator. The control unit prevents a valve bleed if a temperature of oil in the reservoir is not less than a reference temperature. The control unit prevents a valve bleed if a speed of the vehicle is less than a reference speed. The control unit automatically returns the spool to its neutral position from the first and second bleed positions.

53947010, Mar 7, 1995

Feb 25, 1994

8/201549

Douglas M. Durant - Waterloo IA
Larry M. Delfs - Cedar Falls IA
Derek M. Eagles - Cedar Falls IA

Deere & Company - Moline IL

F15B 700
B60T 1126

60533

Left and right two stage brake valves communicate fluid pressure to left and right brake mechanisms, each brake valve having an inlet for receiving pressurized brake fluid, a reservoir, a stepped bore and a stepped piston. The stepped bore and the stepped piston forming a high volume prefill chamber and a high pressure chamber. A prefill drain valve communicates the prefill chambers to the reservoir only when pump pressure is available at the inlet and blocks communication between the left and right prefill chambers and between the prefill chambers and a reservoir when pump pressure is not available at the inlet.

44635575, Aug 7, 1984

Aug 12, 1983

6/522920

James A. Miller - Cedar Falls IA
Derek M. Eagles - Hudson IA

Deere & Company - Moline IL

F16D 3100
B62D 508

60422

An open center hydraulic system is disclosed which contains a primary work circuit and a secondary work circuit. A fixed displacement pump is fluidly connected between a reservoir and the primary and secondary work circuits for supplying pressurized fluid thereto. The primary work circuit includes a control valve which regulates fluid flow from the pump to a primary hydraulic function and which includes a feedback mechanism connected thereto. The secondary work circuit also includes a manually operable control valve for regulating fluid flow from the pump to a secondary hydraulic function. A priority valve is connected between the pump and the secondary work circuit and is movable between an open and a closed position to regulate the pressure of fluid discharged by the pump. Pressurized fluid from the primary work circuit is conveyed through a load signal line to the priority valve such that the pressurized fluid will urge the priority valve towards the closed position thereby assuring that adequate fluid pressure is available from the pump to the primary work circuit. The system also includes a control valve for sensing pressure variations between the fluid discharged from the pump and fluid present in the load signal line.

44702604, Sep 11, 1984

Aug 11, 1983

6/524806

James A. Miller - Cedar Falls IA
Derek M. Eagles - Hudson IA

Deere & Company - Moline IL

F16D 3100
B62D 508

60422

An open center, load sensing hydraulic system is disclosed which contains a primary work circuit and a secondary work circuit. A fixed displacement pump is fluidly connected between a reservoir and both the primary and secondary work circuits for supplying pressurized fluid thereto. The primary work circuit includes a control valve which regulates fluid flow from the pump to a primary hydraulic function and which includes a feedback mechanism connected thereto. The secondary work circuit includes a manually operable control valve for regulating fluid flow from the pump to a secondary hydraulic function. A priority valve is connected between the pump and both the primary and secondary work circuits and is movable to regulate the pressure to the primary work circuit. Pressurized signals from the primary work circuit are transmitted through a load signal lne to the priority valve and are used to move the priority valve to a position which assures that adequate pressure is always available to the primary work circuit. The system also includes a control valve for sensing pressure variations between the fluid discharged from the priority valve and the fluid present in the load signal line.

52458270, Sep 21, 1993

Aug 3, 1992

7/923762

Douglas M. Durant - Waterloo IA
Larry M. Delfs - Waterloo IA
Derek M. Eagles - Cedar Falls IA
Ronald L. Pratt - Taylor Ridge IL

Deere & Company - Moline IL

F16D 3102

60422

A hydraulic system includes a hydraulic pump which provides pressurized fluid at an output port as a function of pressure in a load sensing port, a hydraulic reservoir, and a load pressure sensing line connected to the load sensing port. A solenoid operated implement control valve controls fluid communication to and from a hydraulic function such as a cylinder. A supply control valve has a first position wherein the reservoir is communicated with the load sensing port and a second position wherein the pump output port is communicated with the load sensing port. A spring urges the valve member to its first position, and a solenoid is energizable to move the valve member to its second position. The solenoid is energized when the implement control valve is activated so that the supply control valve communicates pump pressure to the load sensing port and the pump will operate at full capacity whenever the second hydraulic function is operated.