US 12,433,192 B2
Self-propelled work apparatus
Markus Gassner, Koessen (AT); Robert Kugler, Kufstein (AT); Alberto Bellato, Axams (AT); and Christoph Wohlfrom, Heubach (DE)
Assigned to Andreas Stihl AG & Co. KG, Waiblingen (DE)
Filed by Andreas Stihl AG & Co. KG, Waiblingen (DE)
Filed on Oct. 19, 2022, as Appl. No. 18/047,931.
Claims priority of application No. 21210473 (EP), filed on Nov. 25, 2021.
Prior Publication US 2023/0157204 A1, May 25, 2023
Int. Cl. A01D 34/54 (2006.01); A01D 34/00 (2006.01); A01D 34/30 (2006.01); A01D 34/74 (2006.01); A01D 69/06 (2006.01); A01D 101/00 (2006.01)
CPC A01D 34/008 (2013.01) [A01D 34/30 (2013.01); A01D 34/74 (2013.01); A01D 69/06 (2013.01); A01D 2101/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A self-propelled work apparatus comprising:
a chassis;
at least one tool being adjustable in elevation relative to said chassis between a first lower end position and a second upper end position;
a drive motor for driving said tool;
a setting unit for setting said tool in elevation relative to said chassis;
said setting unit including an actuating motor and a setting gear;
said setting gear being rotatable less than one full rotation between said first lower end position of said tool and said second upper end position of said tool;
a detection unit for detecting the position in elevation of said tool;
said detection unit including encoding elements on said setting gear and at least one detector; and,
at least a first one of said encoding elements being provided for said first lower end position and differing from at least a second one of said encoding elements being provided for said second upper end position.