US 11,679,967 B2
Leveling system for lift device
JiHong Hao, Greencastle, PA (US); and Ignacy Puszkiewicz, Hagerstown, MD (US)
Assigned to Oshkosh Corporation, Oshkosh, WI (US)
Filed by Oshkosh Corporation, Oshkosh, WI (US)
Filed on Sep. 2, 2021, as Appl. No. 17/464,897.
Application 17/464,897 is a continuation of application No. 16/525,080, filed on Jul. 29, 2019, granted, now 11,111,120.
Application 16/525,080 is a continuation of application No. 15/880,267, filed on Jan. 25, 2018, granted, now 10,407,288.
Application 15/880,267 is a continuation of application No. 15/482,601, filed on Apr. 7, 2017, granted, now 9,890,024.
Claims priority of provisional application 62/320,280, filed on Apr. 8, 2016.
Prior Publication US 2021/0395058 A1, Dec. 23, 2021
Int. Cl. B66F 9/00 (2006.01); B66C 9/00 (2006.01); B66F 9/075 (2006.01); B66F 11/04 (2006.01); B60G 17/016 (2006.01); B66F 5/04 (2006.01); B66F 9/065 (2006.01); E01B 27/17 (2006.01); B66F 17/00 (2006.01); B60G 9/02 (2006.01); B60P 1/34 (2006.01); B66F 13/00 (2006.01); B60G 21/00 (2006.01); E02F 9/02 (2006.01); B66C 23/00 (2006.01); B60P 3/12 (2006.01)
CPC B66F 9/00 (2013.01) [B60G 9/02 (2013.01); B60G 17/016 (2013.01); B60G 21/007 (2013.01); B60P 1/34 (2013.01); B66C 9/00 (2013.01); B66F 5/04 (2013.01); B66F 9/065 (2013.01); B66F 9/07586 (2013.01); B66F 11/04 (2013.01); B66F 11/044 (2013.01); B66F 13/00 (2013.01); E01B 27/17 (2013.01); E02F 9/02 (2013.01); B60G 2202/413 (2013.01); B60G 2300/022 (2013.01); B60G 2400/0511 (2013.01); B60G 2400/0512 (2013.01); B60G 2400/252 (2013.01); B60G 2400/60 (2013.01); B60G 2500/30 (2013.01); B60G 2800/012 (2013.01); B60G 2800/014 (2013.01); B60P 3/125 (2013.01); B66C 23/54 (2013.01); B66F 9/0655 (2013.01); B66F 17/006 (2013.01)] 20 Claims
OG exemplary drawing
 
15. A lift machine comprising:
a base having a first end and an opposing second end, the first end having a first pivot point and a second pivot point defining a first lateral axis, the opposing second end having a third pivot point and a fourth pivot point defining a second lateral axis;
a first assembly pivotably coupled to the first pivot point and the second pivot point, the first assembly including a first tractive element and a second tractive element, the first assembly extending away from the base in a first direction such that the first tractive element and the second tractive element are longitudinally offset from the first lateral axis and spaced from forward of the first end and the opposing second end of the base;
a second assembly pivotably coupled to the third pivot point and the fourth pivot point, the second assembly including a third tractive element and a fourth tractive element, the second assembly extending away from the base in an opposing second direction such that the third tractive element and the fourth tractive element are longitudinally offset from the second lateral axis and spaced rearward of the first end and the opposing second end of the base;
a first actuator coupled to the first end of the base and the first assembly;
a second actuator coupled to the first end of the base and the first assembly;
a third actuator coupled to the opposing second end of the base and the second assembly; and
a fourth actuator coupled to the opposing second end of the base and the second assembly.