US 11,718,971 B2
Excavator arm
Jules Hannetel, Colmar (FR); Jeremie Grimaud, Horbourg-Wihr (FR); and Guillaume Elbel, Colmar (FR)
Assigned to Liebherr-France SAS, Colmar (FR)
Filed by Liebherr-France SAS, Colmar (FR)
Filed on Jun. 16, 2020, as Appl. No. 16/903,272.
Claims priority of application No. 102019116394.3 (DE), filed on Jun. 17, 2019.
Prior Publication US 2020/0392694 A1, Dec. 17, 2020
Int. Cl. E02F 3/38 (2006.01)
CPC E02F 3/38 (2013.01) [B60Y 2200/412 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An excavator arm,
the excavator arm formed of box sheet metal,
at least one bearing plate mounted on an exterior of an end plate of the box sheet metal forming a boom bearing, and
at least one reinforcing plate applied onto an exterior of the at least one bearing plate around the boom bearing,
wherein two symmetrical bearing plates are aligned parallel to each other and include bearing reinforcements,
wherein the bearing plates extend onto a planar surface of an upper chord of the excavator arm, exhibit a curved course in a direction of a lateral edge of the excavator arm, and only end on a lateral extension of the upper chord.