Dennis J Heyne Deceased824 Cindy Dr, Burlington, IA 52601

6398227, Jun 4, 2002

Oct 13, 2000

09/687327

Richard J. Lech - Burlington IA
Alan D. Berger - Winfield IL
Danley C. K. Chan - Chicago IL
Dennis J. Heyne - Burlington IA

Case Corp. - Racine WI

B60G 1700

280 5515, 280 55, 280 5514, 280 6159

An apparatus for adjusting the ride of a load carrying vehicle is disclosed. The apparatus includes a sensor, a controller, and an adjustable accumulator assembly. The sensor measures a load on a load holding hydraulic circuit. The controller is operatively connected to the adjustable accumulator assembly. The controller is capable of adjusting the precharge pressure in the accumulator in response to the load measured by the sensor.

6474064, Nov 5, 2002

Sep 14, 2000

09/661348

Dennis J. Heyne - Burlington IA
Richard J. Lech - Burlington IA
Eric Sharkness - Burlington IA

Case Corporation - Racine WI

F16D 3102

60468, 60469, 91 38

The invention provides a system for regulating pressure equalization in hydraulic mechanisms to suppress oscillation in heavy equipment. The system includes a first and second hydraulic lines, a crossover valve in communication with each of the first and second hydraulic lines, a timing system in communication with the crossover valve, and a motion detector in communication with a heavy equipment component. The motion detector senses a linkage motion and operatively opens the crossover valve, which remains open as directed by the timing system.

6532738, Mar 18, 2003

Sep 25, 2001

09/962893

Eric Sharkness - Troy MI
Dennis Heyne - Burlington IA
Richard J. Lech - Burlington IA

Case Corporation - Racine WI

F16B 3102

60468

A system for damping incipient oscillation in a linkage such as a backhoe assembly includes a crossover valve that connects the two supply lines that provide hydraulic fluid to a linkage actuator such as a boom swing hydraulic cylinder. The crossover valve is configured to open in response to the deceleration of the backhoe assembly.

6571902, Jun 3, 2003

Dec 28, 2000

09/750854

Dennis J. Heyne - Burlington IA
Peter J. Dix - Naperville IL

Case Corporation - Racine WI

B62D 112

180321, 7447901, 74491, 74523, 180324, 212288

A method of automatically setting an auxiliary hydraulic valves flow rate and returning to that flow rate automatically is disclosed. The work vehicle such as a backhoe has two hand controls, one of which has a button, and the other has a thumb wheel. To set the hydraulic flow rate, one both presses the button one hand control and moves the thumb wheel on the other hand control until the proper flow rate is reached. At this point, both button and thumb wheel are released. This causes the flow rate to be saved in RAM or ROM memory. The flow rate can be varied at any time by rolling the thumb wheel up or down. One can return to the previously save flow rate by pressing the button. Both controls are preferably spring loaded.

6640409, Nov 4, 2003

Sep 25, 2001

09/962818

Eric Sharkness - Troy MI
Dennis Heyne - Burlington IA
Richard J. Lech - Burlington IA

Case Corporation - Racine WI

B23P 2300

294011, 91420

A method for retrofitting a swing damping circuit to a work vehicle such as a backhoe includes disconnecting a boom swing valve from a boom swing cylinder, and coupling the swing damping circuit to the boom swing valve. Alternatively, it may include replacing a boom swing valve with a combined boom swing valve and swing damping circuit that form a unitary valve body.

6647721, Nov 18, 2003

Nov 7, 2001

10/039399

Dennis Heyne - Burlington IA
Richard J. Lech - Burlington IA
Eric Sharkness - Troy MI
David W. Swaim - Joliet IL
Guy T. Stoever - Naperville IL
Ian MacLeod - Ames IA

Case, LLC - Racine WI

F16D 3102

60468, 13711513

The invention provides a system for regulating pressure equalization in hydraulic mechanisms to suppress oscillation in heavy equipment. The system includes a first and second hydraulic lines, a crossover valve in communication with each of the first and second hydraulic lines, a timing system in communication with the crossover valve, and a motion detector in communication with a heavy equipment component. The motion detector senses a linkage motion and operatively opens the crossover valve, which remains open as directed by the timing system.

6886278, May 3, 2005

May 22, 2003

10/443309

Eric Sharkness - Troy MI, US
Dennis Heyne - Burlington IA, US
Richard J. Lech - Burlington IA, US

CNH America LLC - New Holland PA

E02F005/02
F15B011/08

37348, 60468, 91420

An electronic control for damping oscillation of a swinging backhoe assembly includes a crossover valve that connects the hydraulic lines that supply hydraulic fluid to the boom swing cylinders to each other whenever an electronic controller senses incipient oscillation or swinging of the backhoe assembly. The electronic controller senses such parameters as pressure in the conduits and the position of the operator controls or the position of the boom swing control valve that the operator controls to determine incipient oscillation when the backhoe assembly is stopped. The crossover valve may remain open for a predetermined period of time.

6941687, Sep 13, 2005

Sep 25, 2001

09/962894

Eric Sharkness - Troy MI, US
Dennis Heyne - Burlington IA, US
Richard J. Lech - Burlington IA, US

CNH America LLC - New Holland PA

E02F009/28

37348, 37443, 60469

An electronic control for damping oscillation of a swinging backhoe assembly includes a crossover valve that connects the hydraulic lines that supply hydraulic fluid to the boom swing cylinders to each other whenever an electronic controller senses incipient oscillation or swinging of the backhoe assembly. The electronic controller senses such parameters as pressure in the conduits and the position of the operator controls or the position of the boom swing control valve that the operator controls to determine incipient oscillation when the backhoe assembly is stopped. The crossover valve may remain open for a predetermined period of time.