Pioneer Engineering Corporation

Other

Richard J Stallbaumer

Raymond F Pitman

James A Rusk

Larry A Matthes

A proportionally extendable multi section boom crane is provided with an automatically erectable mast pivotally carried by one of the boom sections. The mast, which has a secondary sheave on the outer end thereof, normally rests in a stowed position adjacent the boom section on which it is mounted. The load line of the crane extending from the winch at the base of the boom section is trained over the secondary sheave, as well as sheave structure on the outermost end of the outer boom section. Elongated rod structure carried by one of the extendable boom sections outwardly of the crane has coupling means thereon engageable with the mast to initiate erection thereof after the proportionally movable boom sections have been extended a predetermined extent, normally after about 50% extension thereof. Passage of the load line over the mast in an erected position causes bending forces imposed on the extended boom by a weight suspended from the outermost end of the load line produces forces in opposition to the bending moment on the boom sufficient to prevent significant deleterious deflection of the boom from the longitudinal axis thereof.

Automatically deployable load-line receiving mast structure for limiting

A mobile crane having frame structure supporting a boom and turret unit between the front and rear wheel axles of the crane is provided with four outrigger arms which are extensible to present an extended perimeter X-shaped pattern. The outrigger arms are each swingably attached to the crane for swinging movement from retracted positions adjacent the turret of the crane, to extended X-pattern defining dispositions where the ground engaging pads of the two forwardmost extended outrigger arms are generally aligned with the axis of the front axle of the crane, and the ground engaging pads of the two rearmost outrigger arms are generally aligned with the axis of the rear axle of the crane. Each of the outrigger arms is constructed such that the outer pad supporting ends move through an essentially upright path of travel as they approach, move toward and then move below ground level at the wheels of a crane.

Extended perimeter x-shaped outrigger assembly for cranes

A crane apparatus includes an upstanding mainframe and a boom unit that is supported for rotation on the mainframe through a range of movement of about 500.degree.. The crane is provided with a plurality of fluid transmission lines having first ends fixed relative to the mainframe and second ends fixed relative to the boom unit. An elongated guide tube supports the lines relative to the boom unit and presents a lower end that is spaced radially from the axis of rotation of the boom unit for sweeping the lines along an arcuate path around the axis as the boom unit is rotated, coiling the lines beneath the guide element to inhibit kinking. This management of the lines reduces the amount of twisting per unit length of line and prevents kinking within the range of allowed movement of the boom unit.

Mechanism for rotating a crane turret through a 500.degree. arc

A mobile vehicle is provided with a multiple purpose material handling and working apparatus including a boom, and a tool supporting boom extension supported on the free distal end of the boom for rotation about an axis parallel to the longitudinal axis of the boom. The boom extension includes a body, a linkage structure movable between unpivoted and pivoted positions relative to the body, a coupling, and a linkage drive assembly mounted on and movable with the body for driving the linkage structure between unpivoted and pivoted positions. A rotary drive motor is supported on the boom for rotating the boom extension relative to the boom.

Growing community of inventors

Overland Park, KS, United States of America

Richard J Stallbaumer