PHILIP J EHRHART
Engineers in Beartown, PA

6239696, May 29, 2001

Mar 30, 1999

9/281280

John G. Berger - Landisville PA
Philip J. Ehrhart - Narvon PA

New Holland North America, Inc. - New Holland PA

B60Q 126

340463

A self propelled windrower having no brake pedal is provided with a signal light system conforming to standards for agricultural equipment traveling on public roads. The ground speed of the equipment is sensed and, after it exceeds a threshold speed, computation of equipment acceleration/deceleration begins. When the deceleration exceeds a deceleration threshold, the brake lamps are enabled according to the settings of left turn and right turn signal switches. The brake lamps are enabled as long as the deceleration exceeds the threshold and for a short interval (2 sec) thereafter. If the speed drops below the speed threshold during the short interval, the brake lamps are enabled for an extended period (2 min).

7277785, Oct 2, 2007

Jul 17, 2006

11/487920

Richard P. Strosser - Akron PA, US
Philip J. Ehrhart - Narvon PA, US

CNH America LLC - New Holland PA

G06F 7/70

701 50, 56 102 R

An apparatus and method for calibrating a PTO for driving a header of an agricultural windrower, wherein a programmable control module in connection with at least signal operated device in operative control of a variable displacement pump operable for controlling operation of the PTO, is programmed as part of an automatic calibration routine for determining values for the control signals required for operating the header at a predetermined target speed for a plurality or range of speeds of an engine driving the pump, such at the pump can be controlled to minimize occurrences of overpumping of fluid and resultant problems.

8001751, Aug 23, 2011

Sep 14, 2007

11/901167

Philip J. Ehrhart - Narvon PA, US
Robert L Fackler - Ephrata PA, US

CNH America LLC - New Holland PA

A01D 69/00

56 109, 60468, 56 119, 56 156

A method of gradually relieving pressure in a hydraulic system of a work machine, wherein a pump in fluid communication with the hydraulic system and a fluid reservoir, is operable for pressurizing fluid from the reservoir and pumping the pressurized fluid into the hydraulic system, wherein the pump is restrictive to fluid flow therethrough when not operating, and the hydraulic system includes at least one valve in fluid communication with the work element configured for receiving the pressurized fluid. The valve is controllably operable in at least two operating modes, including a first mode wherein the pressurized fluid can pass therethrough between the pump and the work element or elements, and a second mode wherein the fluid is prevented from passing between the pump and the work element. The method includes operating the valve or valves in the first mode for at least a predetermined time period while the pump is not operating, to allow at least some of any of the pressurized fluid in the work element to flow through the hydraulic system and gradually drain through the pump to the reservoir so as to reduce any pressure in the hydraulic system and the work element.

7669392, Mar 2, 2010

Mar 27, 2007

11/728762

Philip J. Ehrhart - Narvon PA, US

CNH America LLC - New Holland PA

A01D 75/28, A01D 41/14, A01D 46/08

56 102E

A system and apparatus for controlling height of a header of a work machine such as an agricultural windrowing machine or a harvesting machine, which includes height control cylinders jointly or individually operable for raising or lowering the opposite ends of a header to achieve a desired overall height or angle of tilt in relation to the surface of a field or pasture to be cut, which allow the header to be raised, and lowered to the previously selected cut height, without changing the lengths of the cylinders, so as to be usable in combination with an optional header lift and/or float system, and including a flow divider capability which increases accuracy of height control, having particular utility for more precisely controlling the heights of the ends of the header, especially when subjected to uneven dynamic loading conditions, such as during rapid spin turns and the like.

6073431, Jun 13, 2000

Dec 18, 1998

9/216219

Donald L. Osborne - Quarryville PA
Cecil R. Sudbrack - New Holland PA
Robert L. Rice - New Holland PA
Kenneth W. McLean - New Holland PA
Philip J. Ehrhart - Narvon PA

New Holland North America, Inc. - New Holland PA

A01D 3403, A01D 6100

56 157

The invention relates to an improvement to the header of an agricultural self-propelled windrower. The invention has a conditioner assembly and mower assembly that can be separated and removed. Hook and pin combination and a conditioner mounting bolt attach the conditioner assembly. A free link and bell crank allow the flotation springs to remain attached with the header is removed. A header top link can be attached to a bracket on either the conditioner or mower assemblies to assist in moving the header. There is a header lift manifold that moves a restricted flow control valve by a switch-actuated solenoid. When the solenoid is activated, the valve moves and forces hydraulic fluid through an orifice. This allows the header limited movement.

7987656, Aug 2, 2011

Sep 11, 2009

12/558229

Philip J. Ehrhart - Narvon PA, US
Douglas R. Otto - New Holland PA, US

CNH America LLC - New Holland PA

A01D 41/14, A01D 67/00

56 102E, 56 102 R, 56208

A system and apparatus for controlling height of a header of a work machine such as an agricultural windrowing machine or a harvesting machine, which includes height control cylinders jointly or individually operable for raising or lowering the opposite ends of a header to achieve a desired overall height or angle of tilt in relation to the surface of a field or pasture to be cut, and which allow the header to be raised, and lowered to the previously selected cut height, without changing the lengths of the cylinders, so as to be usable in combination with an optional header lift and/or float system.

4793129, Dec 27, 1988

Sep 23, 1987

7/099828

Philip J. Ehrhart - Narvon PA
Gilbert A. Cartee - Holtville CA
Ernest A. Schoeneberger - New Holland PA

Ford New Holland, Inc. - New Holland PA

A01D 7800

56370

An inversion chute for use on a windrow turner having a pickup mechanism for elevating a windrow of crop material off the ground and a cross conveyor for receiving the elevated windrow and conveying the windrow laterally of the direction of travel is disclosed wherein the inversion chute is telescopically mounted in a mounting sleeve to permit lateral adjustment thereof relative to the discharge end of the cross conveyor. The inversion chute is also pivotally mounted on the frame of the windrow turner for movement between an operating position adjacent to and laterally outboard of the cross conveyor and a transport position rearwardly of the pickup and cross conveyor. An overcenter biasing spring retains the inversion chute in its selected position.

7603837, Oct 20, 2009

Jan 13, 2006

11/332030

Philip J. Ehrhart - Narvon PA, US
Douglas R. Otto - New Holland PA, US

CNH America LLC - New Holland PA

A01D 41/14, A01D 67/00

56 102E, 56 102 R, 56208

A system and apparatus for controlling height of a header of a work machine such as an agricultural windrowing machine or a harvesting machine, which includes height control cylinders jointly or individually operable for raising or lowering the opposite ends of a header to achieve a desired overall height or angle of tilt in relation to the surface of a field or pasture to be cut, and which allow the header to be raised, and lowered to the previously selected cut height, without changing the lengths of the cylinders, so as to be usable in combination with an optional header lift and/or float system.

4385484, May 31, 1983

Aug 20, 1981

6/294589

Philip J. Ehrhart - Narvon PA
Peter P. Haldeman - Reinholds PA

Sperry Corporation - New Holland PA

A01D 6700, A01D 1400

563201

A crop harvesting machine having a disc cutterbar is disclosed wherein the shields covering each individual disc cutter unit are connected to a transverse rotatable shaft so that the shields can be pivotally moved between a lowered operative position immediately above the disc cutter unit and a raised inoperative position, wherein convenient access can be had to the disc cutterbar for service and maintenance thereof. The shields are connected to the shaft by mounting tabs having a downwardly depending leg that engages a stop on the header frame to prevent the shields from lowering into a position that would interfere with the rotative operation of the disc cutters. A spring-loaded pin and bracket control mechanism is also provided to selectively lock the shields in either the lowered or raised position by controlling the rotative position of the shaft.

7730701, Jun 8, 2010

Apr 1, 2009

12/416510

Philip J. Ehrhart - Narvon PA, US
D. Russell Whitenight - Benton PA, US
Luke J. Harris - Leola PA, US

CNH America LLC - New Holland PA

A01D 69/00

56 119, 60484, 60431, 60445

A hydraulic driver for powering the conditioner mechanism on an agricultural mower-conditioner, the hydraulic driver being powered by the same hydraulic power circuit that powers the cutting mechanism, but which includes controls for varying the speed and/or direction of rotation of the conditioner mechanism independent from the speed of the cutting mechanism.