DAVID MICHAEL DECHRISTOPHER
Engineers in Ephrata, PA
License number
Pennsylvania PE070901
Category
Engineers
Type
Professional Engineer
Address
Address
Ephrata, PA 17522
Professional information
Pickup Tine Bar Linkage
US Patent:
8261524, Sep 11, 2012
Filed:
Apr 5, 2011
Appl. No.:
13/080604
Inventors:
John R. McClure - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
A01D 43/02, A01D 89/00
US Classification:
56364
Abstract:
An tine reel for a round baler pickup unit allows tine position to be altered dependant of rotational position of the tine reel and the lateral position of the tine on the pickup. A plurality of tine bars are mounted on the tine reel, with separate tine bars provided for the centrally located tines and the outboard located tines. A linkage connects the centrally located inboard tine bars to the outboard tine bars so that rotation of the outboard tine bars by a tine reel cam and cam follower mechanism is transferred to the inboard tine bar without the need for a second cam or second cam follower mechanism. The linkage configuration is adjusted to provide optimal tine extension position for both the centrally located and the outboard located tines.
Fast Tie Quad Twine Wrapping Mechanism
US Patent:
7658145, Feb 9, 2010
Filed:
Nov 14, 2008
Appl. No.:
12/271105
Inventors:
John R. McClure - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
B65B 13/02, B65B 13/18
US Classification:
100 2, 100 5, 100 13, 100 88, 56341
Abstract:
A simplified mechanism for feeding a plurality of individual twine strands into a bale forming chamber for wrapping a bale that allows user-selectable adjustment of twine strand spacing along the bale length so that an optimal number of circumferential twine wraps around the bale necessary to secure the bale after discharge from the bale forming chamber may be selected. The simplified thus enables the spacing between twine strands to be optimized for various crop materials that are being baled.
Windrow Merger Lift Mechanism
US Patent:
7624561, Dec 1, 2009
Filed:
Dec 4, 2007
Appl. No.:
11/949967
Inventors:
Kenneth W. McLean - New Holland PA, US
Robert L. Rice - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
Robert L. Rice - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
A01D 43/00
US Classification:
56192
Abstract:
A windrow merger lift mechanism having on a pair of rotational axes, skewed with respect to each other, to manipulate a merger apparatus between working and non-working positions. When the merger apparatus is in a first, or working position, the lift mechanism positions it to receive crop material from the conditioner rolls with minimal losses. When the merger apparatus is in a second, or non-working position, the lift mechanism positions the merger apparatus to allow crop material to be discharged from the header/conditioner with the same efficiency as a windrower having no installed merger attachment. The skewed axes of the merger lift mechanism optimize the merger position in both the working and non-working positions by moving the merger apparatus in four distinct, but related degrees of motion as the merger apparatus is moved between the positions.
Windrow Merger Lift Assist Bar
US Patent:
7526908, May 5, 2009
Filed:
Dec 13, 2007
Appl. No.:
11/955533
Inventors:
Robert L. Rice - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
A01D 43/00, A01D 57/00
US Classification:
56192
Abstract:
A lift assist bar for a windrow merger lift mechanism comprising an elongate lift bar connected at one end to the lift mechanism using a ball joint and having a bearing structure on the opposite end, a fulcrum pin connected to a lift arm of the mechanism for contact with an intermediate point of the lift bar between the opposing ends, and a bearing pad connected to the windrower chassis wherein said lift assist bar, being positioned by movement of the lift mechanism from a working position of the merger apparatus toward a non-working position such that the bearing structure contacts the bearing pad, causes the merger assembly to be lifted and held in the non-working position thereby reducing stresses on other linkage members of the lift mechanism.
Dual Flywheel Axially Compact Epicyclical Drive
US Patent:
8011272, Sep 6, 2011
Filed:
Apr 28, 2010
Appl. No.:
12/768952
Inventors:
Gary L. Bich - New Holland PA, US
Beau Carlson - Ephrata PA, US
David M. DeChristopher - Ephrata PA, US
Beau Carlson - Ephrata PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
F16C 3/04
US Classification:
74595, 56299
Abstract:
The epicyclical drive incorporates a dual flywheel carrying a pinion in a balanced axially compact assembly. The assembly includes a counterweight for the pinion nested between the flywheels, which also connects the flywheels and transfers loading conditions therebetween, to reduce and distribute torsional and eccentric loading conditions and reduce vibrations. The use of a second flywheel also provides an improved rotary seal capability for keeping out dust, debris and moisture. The drive is adapted for incorporation into a floor of a header of an agricultural harvesting machine for reciprocatingly driving a sickle thereof, advantageously jointly with a mirror image companion drive in a side by side relationship and timed such that forces generated by the reciprocating actions are cancelled.
Dual Tine Paths From Different Tine Bars In A Pickup
US Patent:
8156723, Apr 17, 2012
Filed:
Apr 21, 2011
Appl. No.:
13/091193
Inventors:
John R. McClure - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
W. Dale Hotaling - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
W. Dale Hotaling - New Holland PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
A01D 43/02, A01D 89/00
US Classification:
56364, 56341
Abstract:
An improved tine reel for a round baler pickup unit that allows tine position to be altered dependant of rotational position of the tine reel and the lateral position of the tine on the pickup. A plurality of tine bars are mounted on the tine reel, with separate tine bars provided for the centrally located tines and the outboard located tines. Separate cams control rotation of the centrally located inboard tine bars and the outwardly located outboard tine bars so that outboard tine position can be optimized without limitation by the inboard tines.
Windrow Merger Lift Mechanism
US Patent:
7877975, Feb 1, 2011
Filed:
Sep 3, 2009
Appl. No.:
12/553198
Inventors:
Kenneth W. McLean - New Holland PA, US
Robert L. Rice - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
Robert L. Rice - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
A01D 43/00
US Classification:
56192
Abstract:
A windrow merger lift mechanism having on a pair of rotational axes, skewed with respect to each other, to manipulate a merger apparatus between working and non-working positions. When the merger apparatus is in a first, or working position, the lift mechanism positions it to receive crop material from the conditioner rolls with minimal losses. When the merger apparatus is in a second, or non-working position, the lift mechanism positions the merger apparatus to allow crop material to be discharged from the header/conditioner with the same efficiency as a windrower having no installed merger attachment. The skewed axes of the merger lift mechanism optimize the merger position in both the working and non-working positions by moving the merger apparatus in four distinct, but related degrees of motion as the merger apparatus is moved between the positions.
Pickup Helper Feeding Roll
US Patent:
8240117, Aug 14, 2012
Filed:
Mar 7, 2011
Appl. No.:
13/042345
Inventors:
John R. McClure - New Holland PA, US
David M. DeChristopher - Ephrata PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
A01D 39/00, A01D 43/02, A01D 75/00
US Classification:
56341
Abstract:
A crop pickup apparatus for a round baler in which the pickup apparatus substantially wider than the bale chamber inlet opening. The pickup includes a pair of large crop converging augers situated along a common axis, one each on opposing sides of the crop inlet, and forwardly adjacent to the bale chamber infeed throat. The pickup apparatus also include a secondary crop feeding roll having a plurality of generally radially extending fingers that upwardly extend into the crop mat in an area adjacent to the converging augers to convey crop material from a forwardly disposed pickup tine reel to the inlet opening. The fingers are arranged to partially overlap with tines on the tine reel so that the crop material is generally continuously urged along the entire longitudinal feed path into the inlet opening.
Modular Disc Cutterbar
US Patent:
7730703, Jun 8, 2010
Filed:
Aug 24, 2009
Appl. No.:
12/546202
Inventors:
Philip J. Ehrhart - Narvon PA, US
Donald L. Osborne - Quarryville PA, US
David M. DeChristopher - Ephrata PA, US
Donald L. Osborne - Quarryville PA, US
David M. DeChristopher - Ephrata PA, US
Assignee:
CNH America LLC - New Holland PA
International Classification:
A01D 34/00
US Classification:
56 136
Abstract:
A disc cutter module mounting structure for an agricultural header that enables one or more disc cutter modules and interconnection spacers to be temporarily laterally displaced a distance sufficient to disengage the transverse drive apparatus from a failed module thereby allowing the failed module to be removed from the header for repair or replacement. The laterally displaced modules and spacers need only be disconnected from the outboard drive shaft; lateral displacement is accomplished by the incorporation of slotted mounting guides on the spacers and a plurality of spaced-apart support tabs on the header frame. The mounting structure also supports the modules and spacers during the removal/replacement process reducing the need for jacks to support modules as they are being repositioned on the header.