Claims
- 1. 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.
- 2. A drill mast in accordance with claim 1 wherein the bodies are disposed within the triangle defined by the three chords.
- 3. A drill mast in accordance with claim 2 together with a track mounted along the length of each side chord.
- 4. 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.
- 5. A drill mast in accordance with claim 4 wherein the lacing members joining the side chords are connected to spheres disposed intermediate the side chords.
- 6. A drill mast in accordance with claim 5 wherein the spheres are disposed in a line that is parallel to the chords and spaced equidistant from the chords.
- 7. A drill mast in accordance with claim 6 together with tracks mounted along the length of the side chords.
- 8. A drill mast in accordance with claim 5 wherein the chords, lacing members, and spheres are steel and are joined by welding.
- 9. A drill mast in accordance with claim 4 wherein the side chords are formed of rectangular tubes and the central chord is round.
- 10. 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.
- 11. A drill mast in accordance with claim 10 wherein the spheres are disposed in a line that is parallel to the chords and spaced equidistant from the chords.
- 12. A drill mast in accordance with claim 11 wherein the side chords are formed of rectangular tubes and a track is mounted along the length of each side chord.
BACKGROUND OF THE INVENTION
This application claims the benefit of U.S. Provisional Application No. 60/020,856 file Jun. 28, 1996.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
757674 |
Aug 1980 |
SUX |