The Walter Kidde Company Limited

Reginald P Whittingham

To facilitate transferring a massive boom assembly from a regular crane carrier vehicle to an independent transport trailer, retractable pivot pins and power means to actuate the same are provided on the boom support frame of the crane turntable. The pivot pins, when in their active positions, project through main journals on the crane boom suspension structure. Safety locking elements prevent accidental retraction of the pivot pins during normal operation of the boom on the regular carrier vehicle.

Crane with a pivotal assembly for detachably connecting and supporting a

To facilitate transferring a massive crane boom from a regular crane carrier vehicle to an independent transport trailer, pivot pins for the rear ends of boom lift cylinders are held removably in journal boxes which are recessed into the crane turntable and are normally held captive in the recesses by shiftable locking dogs adapted to be extended over the tops of the journal boxes and to be retracted therefrom. The locking dogs are operated by turntable mounted power cylinders and safety means is provided to block accidental retraction of the locking dogs during normal crane usage.

Crane with left cylinder and journal lock and release device

For the purpose of complying with highway vehicle weight limitations, the boom assembly of a mobile construction crane is transferred from the regular crane carrier vehicle to an independent transport vehicle having a carriage means to receive and support the massive boom assembly for transport thereof.

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St. Thomas, PA, United States of America

Reginald P Whittingham