Electrical safety control device for a variable radius crane

Electrical switchboard apparatus with integral traveling lifting

Excavating device

Excavator having adjustable wheels

Excavator with low center of gravity

Extensible and collapsible portable derrick

Extensible boom

Extensible reach load lifting mechanism

Flexing beam assembly

Floating crane comprising a main jib which can be deposited on d

Freely-movable auxiliary hoist for a gantry crane and method for

Gantry crane with plural hoist means

Gantry stacker with two side-by-side spreaders

Grapple carriage

Grapple skidder with self-centering grapple support mechanism

Grappler sway stabilizing system for a gantry crane

Guy crane jib tip prop

Hay loader

Heavy duty crane

High-capacity crane with counter-weight device