Manitowoc Crane Companies, Inc.

Jonathan Michael Borlee

Joel David Zick

Timothy James Albinger

Stephen Anthony Vossen

Joseph R Rucinski

William J O'Neil

Derrick L Geiser

Brian Nicholas Nysse

John William Taylor

Brandon D Resch

David A Robertson

Ingo Noeske

Steven Anthony Vossen

A compressible stop for use in a crane has a housing, a rod slidably mounted within the housing, a floating piston, and a valve assembly. The floating piston divides the housing into a gas portion biasing the floating piston towards an end of the housing and a liquid portion containing a hydraulic fluid. The valve assembly divides the liquid portion into a support portion and a reserve portion. The valve assembly includes a check valve allowing a liquid to flow from the reserve portion into the support portion, a pressure sensitive valve inhibiting the liquid from flowing from the support portion into the reserve portion unless the pressure is above a threshold pressure, and a frangible divider configured to rupture when the liquid pressure exceeds a rupture pressure.

Fast acting compressible stop

A lift crane includes a carbody and movable ground engaging members mounted on the carbody. A rotating bed is rotatably connected to the carbody and includes a counterweight support frame including a rack coupled directly to a lower surface of the rotating bed. A boom is pivotally mounted to the rotating bed. A counterweight unit movement device is configured to move the counterweight unit toward and away from the boom. At least one auxiliary member includes a counterweight pad that is configured to not touch the ground during a pick, move, and set operation. A linear actuator is configured to adjust a distance that the counterweight pad is above the ground.

Height adjustment mechanism for an auxiliary member on a crane

Growing community of inventors

Green Bay, WI, United States of America

Jonathan Michael Borlee