US 12,404,652 B2
Loader lift arm
Branden Schiwal, Bismarck, ND (US)
Assigned to Doosan Bobcat North America, Inc., West Fargo, ND (US)
Filed by DOOSAN BOBCAT NORTH AMERICA INC., West Fargo, ND (US)
Filed on Apr. 16, 2024, as Appl. No. 18/636,849.
Application 17/185,150 is a division of application No. 15/957,170, filed on Apr. 19, 2018, granted, now 10,934,681, issued on Mar. 2, 2021.
Application 18/636,849 is a continuation of application No. 17/185,150, filed on Feb. 25, 2021, abandoned.
Claims priority of provisional application 62/487,153, filed on Apr. 19, 2017.
Prior Publication US 2024/0344293 A1, Oct. 17, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. E02F 3/38 (2006.01); B22D 25/00 (2006.01); B22D 25/02 (2006.01); E02F 3/34 (2006.01); E02F 3/36 (2006.01); E02F 3/42 (2006.01); E02F 3/627 (2006.01); A01B 63/24 (2006.01)
CPC E02F 3/38 (2013.01) [B22D 25/00 (2013.01); B22D 25/02 (2013.01); E02F 3/3414 (2013.01); E02F 3/3686 (2013.01); E02F 3/382 (2013.01); E02F 3/422 (2013.01); E02F 3/627 (2013.01); A01B 63/24 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A power machine comprising:
a frame;
a lift arm having a forward end;
a driver link, the driver link pivotally coupled to the frame using a frame pivot attachment such that the driver link pivots about a first pivot axis relative to the frame and the driver link pivotally coupled to the lift arm using a lift arm pivot attachment such that the driver link pivots about a second pivot axis relative to the lift arm;
a lift cylinder pivotally coupled to the frame and to the lift arm and configured to raise and lower the forward end of the lift arm, the lift cylinder comprising a lift cylinder body and a rod, wherein the rod extends from a top end of the lift cylinder body;
tractive elements configured for rotation;
wherein the frame pivot attachment is positioned such that the first pivot axis is rearward of an axis of rotation of a rearmost tractive element; and
wherein the lift arm pivot attachment is positioned lower than and rearward of the top end of the lift cylinder body when the lift arm's forward end is in a fully lowered position, such that, when the lift arm pivot attachment crosses from a position rearward of the lift cylinder body top to a position forward of the lift cylinder body top as the lift arm's forward end is raised by the lift cylinder, the lift arm pivot attachment is higher than the top end of the lift cylinder body.