Traversing hoists – Boom or mast – Extensible by sliding sections
Patent
1997-09-19
1999-02-02
Brahan, Thomas J.
Traversing hoists
Boom or mast
Extensible by sliding sections
212230, 212348, B66C 23697
Patent
active
058653287
ABSTRACT:
The present invention relates to a telescopic boom with at least one outer structure and at least one inner structure, each of which is designed as a hollow section with upper flange and lower flange, the upper flange having a half-basket profile with two rounded edges to which the lower flange is joined with a liner of an essentially U-shaped profile, and each structure being mounted on the adjoining structure with a front and a back bearing. To achieve a stable bearing of the structures and a great usable extension length with this boom under high force level, the invention proposes that the front bearing has a slide element in the area between the lower flanges only in the region of the curvature, and the back bearing has a separate plain bearing half liner in the area between the upper flanges only in the region of each rounded edge.
REFERENCES:
patent: 3481490 (1969-12-01), Eiler
patent: 3796016 (1974-03-01), Wu
patent: 4148531 (1979-04-01), Hornagold
patent: 4276210 (1981-06-01), Landolt et al.
patent: 4357785 (1982-11-01), Eklund
patent: 4478014 (1984-10-01), Poock et al
patent: 5158189 (1992-10-01), Watson et al.
Brahan Thomas J.
EC Engineering & Consulting Spezial-maschinen GmbH
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