Grove US LLC

Jon E Fleagle

William W Banks

Dennis W Eckstine

Kurt W Richter

Francis R Eyler

David Young

A mobile crane includes a chassis having first connection features located on a rear end thereof. An outrigger includes second connection features for mating with the first connection features. A tag axle assembly includes third connection features for mating with the first connection features. The first connection features may accept either the second connection features or the third connection features, so that the mobile crane may be selectively configured for highway travel and selectively configured for working operation. One or more axles of the mobile crane may be elevated when the tag axle assembly is connected to the first connection feature. Further, a wheeled boom dolly may be employed to share weight with the chassis when the mobile crane is travelling. By allowing the outrigger to be replaced with the tag axle assembly, the present invention allows the mobile crane to be conveniently configured for road travel in a manner suitable to the axle spacing and axle weight restrictions of the local area.

Re-configurable crane carrier

In the anti-two block device, a non-contact measuring device detects in one form or another the distance between a boom nose and a load-bearing member supported thereby. If the distance detected is less than a predetermined threshold value, the device triggers a warning or other operation to assist an operator in preventing anti-two blocking.

Anti-two block device using non-contract measuring and detecting devices

The automatic leveling and synchronization system for raising and lowering a counterweight includes at least a primary and secondary cylinder connected in series hydraulic communication. The primary cylinder includes a first rod connected to a first piston, and the first rod is attached to one end of a counterweight. The secondary cylinder includes a second rod connected to a second piston, and the second rod is attached to another end of the counterweight. A surface area of a bottom of the second piston is set equal to a surface area of a top of the first piston.

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Waynesboro, PA, United States of America

Jon E Fleagle