Telescopic boom for a crane
AssigneeCreusot-Loire
InventorMaurice Jouffray
Life of this patent
Estimating the term…
Abstract
A telescopic boom of a crane comprising a base element adapted for support on a turret of the crane, and a plurality of telescopic elements slidably engaged within one another and within the base element. The elements have a polygonal cross-section, each element having a lower or inner compression leg of inverted V-shape which opens downwardly and falls the load. First guide shoes are mounted on each telescopic element on the upper or outer leg thereof, bearing against the surrounding element, and second guide shoes are mounted on each branch of the inverted V-shaped inner leg also bearing against the surrounding element.
Claims6
A telescopic boom of a crane for lifting a load, comprising:
- a base element for support on a turret of the crane;
- a plurality of telescopic elements slidably engaged with one another and with said base element, said telescopic elements having a configuration of a five sided polygonal in cross-section with the general outer appearance of an isosceles trapezoid, each element having a substantially horizontal upper section, inwardly tapering walls, a branched base section including two legs forming an obtuse angle of an inverted V-shape, means connecting said walls to said base and upper section, said walls extending perpendicularly to the respective leg of said base section, first guide means mounted on said horizontal section for engaging a surface of an adjacent telescopic element, and second guide means mounted on each leg of the base of the respective inner element relative to said base element.
Dependencies are inferred from the claim text.