1
Henry K Orthman: Floating folding tool bar having a lock means. Orthman Manufacturing, Zarley McKee Thomte Voorhees & Sease, February 21, 1978: US04074766 (50 worldwide citation)

A farm implement tool bar includes a main frame section having a wing section pivotally connected thereto and operated by a hydraulic cylinder located in a passageway in the main frame. The pivotal connection between the hydraulic cylinder and the wing section includes a lost motion connection to al ...


2
Michael E Frasier: Quick hitch guidance device. Orthman Manufacturing, Zarley McKee Thomte Voorhees & Sease, September 9, 1997: US05664632 (38 worldwide citation)

The invention relates to a quick hitch guidance system which allows an operator to maintain proper alignment with a farm implement while towing it behind a tractor. The device includes an exterior inverted U-shaped frame with an external quick hitch coupling element. Within the frame there is attach ...


3
Michael E Frasier: Quick hitch guidance device. Orthman Manufacturing, Zarley McKee Thomte Voorhees & Sease, April 30, 1996: US05511623 (35 worldwide citation)

The invention relates to a quick hitch guidance system which allows an operator to maintain proper alignment with a farm implement while towing it behind a tractor. The device includes an exterior inverted U-shaped frame with an external quick hitch coupling element. Within the frame there is attach ...


4
Orthman Henry K: Agricultural implement. Orthman Manufacturing, November 27, 1973: US3774693 (29 worldwide citation)

A farm implement having a tool bar including a hollow main frame and oppositely extending wing sections pivotal between horizontal and vertical positions. A hydraulic cylinder is positioned inside the opposite ends of the hollow main frame and engages an ear on the adjacent wing section extending in ...


5
Michael E Frasier: Forwardly-folding agricultural implement. Orthman Manufacturing, Zarley McKee Thomte Voorhees & Sease, June 20, 2000: US06076613 (26 worldwide citation)

A forwardly-foldable agricultural implement includes a center frame supported by wheels and extending generally transverse to the direction of travel, and a pair of wing sections. Each wing section has an intermediate portion pivotally connected to the center frame by a foldable frame and being supp ...


6
Henry K Orthman: Folding tool bar having a transport brace. Orthman Manufacturing, Zarley McKee Thomte & Voorhees, March 2, 1976: US03941194 (26 worldwide citation)

A farm implement tool bar includes a hollow main frame and oppositely extending wing sections pivotal between horizontal and vertical positions. A hydraulic cylinder is connected to a mounting assembly including upper and lower mounting plates interconnected at their inner ends by a vertical post. T ...


7
Henry K Orthman: Apparatus for synchronizing the steering disc and row follower means of a row crop implement. Orthman Manufacturing, Zarkey McKee Thomte Voorhees & Sease, October 21, 1980: US04228860 (22 worldwide citation)

In a row crop implement having an elongated tool bar, a steerable coulter disc, a row follower mechanism connected to the tool bar, and a device for steering the coulter disc in response to movement of the row follower mechanism, an apparatus for synchronizing the steering disc and row follower mech ...


8
Henry K Orthman: Steering device for row crop cultivator. Orthman Manufacturing, Zarley McKee Thomte Voorhees & Sease, January 22, 1980: US04184551 (21 worldwide citation)

A precision steering apparatus, affixed to the tool bar of a row crop cultivator, includes a pair of transversely spaced and pivotally mounted coulter discs and a steering mechanism for pivotally moving the coulter discs in unison. A furrow follower mechanism detects lateral drifting of the cultivat ...


9
Henry K Orthman: Tractor front end hitch. Orthman Manufacturing, Zarley McKee Thomte Voorhees & Seas, May 28, 1985: US04519623 (20 worldwide citation)

A tractor front end hitch comprising a main frame removably secured to the front end of a tractor and having a pair of lower lift arms pivotally secured thereto and extending forwardly therefrom for connection to the implement. A pair of upper lift arms are pivotally secured at their rearward ends t ...


10
Henry K Orthman: Ground conditioning device and method of conditioning soil. Orthman Manufacturing, Zarley McKee Thomte Voorhees & Sease, July 25, 1978: US04102406 (18 worldwide citation)

Water-holding and retaining cavities are formed in furrows with the cavities being staggered between adjacent rows. An arm spring biased downwardly carries a hub having spikes in planes laterally spaced apart with the spikes around the hub being staggered between the planes. Each spike is concave lo ...