Mobile crane having a superlift device

Details Mobile crane having a superlift device Mobile crane having a superlift device

2007-08-07

2007-08-07

Brahan, Thomas J. (Department: 3654)

Traversing hoists

Having random condition sensor combined with an indicator or...

Sensor regulates counterweight or counterbalancing means

C212S095000

Reexamination Certificate

active

10494726

ABSTRACT:
A mobile crane with a carrier and a superstructure which is slewably arranged thereon has a superlift device with an SL counterweight for increasing lifting capacity. The SL counterweight can be lifted from the ground in order to execute slewing movements of the superstructure and its slewing radius is changeable. The crane has an electronic control device with a computing device and with a display. In order to avoid costly conversion work on the SL counterweight and to increase operating safety, a program is stored in the electronic control device, which program determines a permissible operating field for crane parameters from the parameters comprising load size and load radius, size of SL counterweight and SL counterweight radius while taking into account the stability criteria and capacity criteria of the mobile crane and displays this operating field graphically on the display. Within this operating field, these parameters may be safely changed, the rest of the parameters remaining constant, and the lifting of the SL counterweight from the ground can be ensured.

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