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US 5,956,915 AGranted
Tubular drill mast
AssigneeBucyrus International, Inc.
InventorsJames P. Piper, Carl D. Gilmore, Kenneth W. Hammel, Frank R. Szpek
Life of this patent
Estimating the term…
Abstract
A drill mast has two tubular side chords and a central chord equally spaced from the side chords. The central chord is joined to the side chords by transverse and diagonal tubular lacing members. Space frames formed of tubular members extending from spheres are connected to each of the chords. The spheres are aligned along a line equidistant from the chords.
Claims12
A drill mast, comprising:
- a pair of spaced, parallel longitudinal side chords and a central longitudinal chord equally spaced from and parallel to the side chords;
- transverse and diagonal lacing members joining the chords together along their length, the lacing members forming triangular panels;
- and
- three-dimensional bodies disposed equidistant between the side chords and to which the lacing members joining the side chords are connected.
1 more element
A drill mast, comprising:
- a pair of spaced, parallel tubular side chords and a central tubular chord that is equally spaced from and parallel to the side chords;
- tubular lacing members joining the chords together along the length of the chords;
- said lacing members including transverse and diagonal members defining triangular openings with the chords;
- and three-dimensional bodies disposed equidistant between the side chords and to which the lacing members joining the side chords are connected.
1 more element
A drill mast, comprising:
- a pair of spaced, parallel tubular side chords and a central tubular chord that is equally spaced from and parallel to the side chords;
- tubular transverse and diagonal lacing members joining the central chord to each of the side chords along the length of the chords;
- and
- frames joining the chords together along their length, the space frames being formed by diagonal tubular lacing members connected to the chords and to spheres disposed intermediate the side chords.
1 more element
Dependencies are inferred from the claim text.