US 11,964,850 B2
Crane
Martin Assfalg, Oggelsbeuren (DE); and Simon Holl, Betzenweiler (DE)
Assigned to Liebherr-Werk Biberach GmbH, Biberach an der Riss (DE)
Filed by Liebherr-Werk Biberach GmbH, Biberach an der Riss (DE)
Filed on Sep. 17, 2021, as Appl. No. 17/448,025.
Application 17/448,025 is a continuation of application No. PCT/EP2020/005595, filed on Mar. 6, 2020.
Claims priority of application No. 10 2019 107 142.9 (DE), filed on Mar. 20, 2019; and application No. 10 2019 126 687.4 (DE), filed on Oct. 2, 2019.
Prior Publication US 2022/0002118 A1, Jan. 6, 2022
Int. Cl. B66C 13/54 (2006.01); B66C 15/02 (2006.01)
CPC B66C 13/54 (2013.01) [B66C 15/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fast-erecting crane comprising:
a telescopable and/or luffable tower with a height-adjustable mounted control and/or personnel stand configured to be lifted and lowered by two lifting elements, wherein the two lifting elements are articulated to a balancing rocker that is luffably mounted on a rocker bearing head connected to the control and/or personnel stand about a horizontal pivot axis;
a monitoring and/or safety device for monitoring the control and/or personnel stand, wherein the pivot axis is configured as a measurement axis for detecting the load state of the luffable bearing of the balancing rocker and for providing a load signal to the monitoring and/or safety device; and
a lever mechanism for generating a change of the measurement axis load acting on the measurement axis in dependence on a rotation of the balancing rocker relative to the rocker bearing head, and wherein the lever mechanism is associated with the balancing rocker and/or the rocker bearing head and/or the measurement axis.