US 11,053,666 B2
Cylinder in boom
Jaroslav Fiser, Pribram (CZ); Martin Masa, Dobris (CZ); and Bohuslav Vasicek, Prague (CZ)
Assigned to CLARK EQUIPMENT COMPANY, West Fargo, ND (US)
Appl. No. 16/489,898
Filed by Clark Equipment Company, West Fargo, ND (US)
PCT Filed Mar. 23, 2018, PCT No. PCT/US2018/023977
§ 371(c)(1), (2) Date Aug. 29, 2019,
PCT Pub. No. WO2018/175858, PCT Pub. Date Sep. 27, 2018.
Claims priority of provisional application 62/475,454, filed on Mar. 23, 2017.
Prior Publication US 2020/0024829 A1, Jan. 23, 2020
Int. Cl. E02F 9/22 (2006.01); E02F 3/32 (2006.01); E02F 3/42 (2006.01)
CPC E02F 9/2271 (2013.01) [E02F 3/32 (2013.01); E02F 3/425 (2013.01); E02F 9/2267 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A power machine comprising:
a frame comprising a lower frame portion and an upper frame portion, the upper frame portion rotatably mounted on the lower frame portion and configured to be rotated relative to the lower frame portion;
a first lift arm structure having a boom pivotably coupled to the upper frame portion at a first pivot joint;
a boom actuator pivotally coupled between the boom and the upper frame portion at a second pivot joint and operable to raise and lower the boom relative to the upper frame portion along a first path as the boom actuator raises and lowers the boom, the second pivot joint being positioned lower than the first pivot joint;
a second lift arm pivotably coupled to the lower frame portion;
a lower lift arm actuator coupled between the second lift arm and the lower frame portion and configured to raise and lower the second lift arm relative to the lower frame portion;
an implement mounted to the second lift arm and configured to be raised and lowered with the lower lift arm by the lower lift arm actuator, a surface of the implement moving along a second path as the second lift arm is raised and lowered by the lower lift arm actuator, wherein the first path of the boom and the second path of the surface of the implement can intersect; and
a stop positioned and oriented to receive contact between the boom and the surface of the implement as the boom moves along the first path and the surface of the implement moves along the second path to prevent contact between the boom actuator and the implement;
wherein the stop is arranged at a position to intercept the second path of the surface of the implement.