초록 ▼

A hole-saw assembly including a hole-saw having at one end a plurality of cutting teeth and at the other end two shafts. The assembly includes a mandrel coaxially aligned with said hole-saw and including a body having two bores therethrough coaxially aligned with said shafts. An annulus located on t

A hole-saw assembly including a hole-saw having at one end a plurality of cutting teeth and at the other end two shafts. The assembly includes a mandrel coaxially aligned with said hole-saw and including a body having two bores therethrough coaxially aligned with said shafts. An annulus located on top of the body is coaxially aligned with said mandrel and hole saw and includes two holes, the annulus rotatable around its longitudinal axis from a first to a second position. In the first position the annulus holes are aligned with the bores and shafts allowing the shafts to be freely insertable and removable and in the second position the holes are misaligned to lock the shafts to the annulus. Such an arrangement allows the hole-saw and the mandrel to be easily and quickly mountable and demountable.

대표청구항 ▼

The invention claimed is: 1. A rotational tool support assembly including: a boss adapted at one end to support a tool and at the other end two shafts; a driving means coaxially aligned with said boss and including a body having two bores therethrough coaxially aligned with said shafts; a locking r

The invention claimed is: 1. A rotational tool support assembly including: a boss adapted at one end to support a tool and at the other end two shafts; a driving means coaxially aligned with said boss and including a body having two bores therethrough coaxially aligned with said shafts; a locking ring coaxially aligned with said driving means and boss and including two holes, said locking ring rotatable around its longitudinal axis from a first to a second position, wherein in said first position said locking ring holes are aligned with said bores and said shafts allowing said shafts to be freely insertable and removable and in said second position said holes being misaligned thereby locking said shafts to said locking ring. 2. A hole-saw assembly including: a hole-saw having at one end a plurality of cutting teeth and at the other end two shafts; a mandrel coaxially aligned with said hole-saw and including a body having two bores therethrough coaxially aligned with said shafts; a locking member forming part of said mandrel and including two holes, said locking member moveable from a first to a second position, wherein in said first position said locking member holes are aligned with said bores and said shafts allowing said shafts to be freely insertable and removable and in said second position said holes being misaligned thereby locking said shafts to said locking member. 3. A hole-saw assembly as in claim 2 wherein said locking member is biased to said second position. 4. A hole-saw assembly as in claim 2 wherein said assembly includes a base from which therein extend the two shafts, said base including a mounting means for mounting of a hole-saw thereon. 5. A hole-saw assembly as in claim 4 wherein said hole-saw includes a threaded inner bore adapted to engage a threaded outer projection extending from said base. 6. A hole-saw assembly as in claim 2 wherein said shafts include a flute adjacent said outer end and a cap on said outer end, the cap having an inner surface adapted to engage the locking member when said locking member is in said second position to thereby lock the shafts from longitudinal movement from the locking member. 7. A hole-saw assembly as in claim 2 including a drill-bit mounted on said mandrel, said drill-bit extending through and beyond said hole-saw. 8. A hole-saw assembly as in claim 2 where said locking member is an annulus coaxially aligned with said mandrel. 9. A hole-saw assembly as in claim 8 wherein said annulus is rotatable around its longitudinal axis from said first to said second position. 10. A hole-saw assembly including: a hole-saw having a longitudinal body with a plurality of cutting teeth at one end and a threaded inner bore at the other end; a base including a disk co-axially aligned with said hole-saw body and including a threaded projection extending longitudinally therefrom, said projection adapted to be engaged by said hole-saw threaded bore, said disk including a pair of shafts extending in a longitudinal direction away from said hole-saw, each said shaft including a column adjacent said base, a flute adjacent said shaft outer end and a chamfered cap, the diameter of said cap equal to the diameter of said column; a mandrel co-axially aligned with said base and hole-saw and including a body having a drill bit extending therefrom, said drill bit passing through central apertures in the base and said hole-saw, said mandrel further having two bores therethrough co-axially aligned with said base shafts; an annulus resting on top of said base and being rotatable between a first and second position, said annulus further including two holes wherein said holes in the first position are aligned with the bores in said mandrel and the shafts of said base, and in said second position are misaligned, the thickness of the mandrel body and annulus being such that the flute is engaged by said annulus with the cap extending beyond the annulus so that when in said second position the annulus locks said shafts in a relative longitudinal position. 11. A hole-saw assembly as in claim 10, said assembly including an inner and an outer hole-saw mounted on said mandrel, said inner hole-saw extending beyond said outer hole-saw. 12. A rotational tool support assembly including: a boss adapted at one end to support a tool and at the other end at least one shaft; a driving means coaxially aligned with said boss and including a body having at least one bore therethrough coaxially aligned with said at least one shaft; a locking ring coaxially aligned with said driving means and boss and including at least one hole, said locking ring rotatable around its longitudinal axis from a first to a second position, wherein in said first position said at least one hole of said locking ring is aligned with said at least one bore and said at least one shaft, thereby allowing said at least one shaft to be freely insertable and removable; and in said second position said at least one hole being misaligned, thereby locking said at least one shaft to said locking ring. 13. A hole-saw assembly including: a hole-saw having at one end a plurality of cutting teeth and at the other end at least one shaft; a mandrel coaxially aligned with said hole-saw and including a body having at least one bore therethrough coaxially aligned with said at least one shaft; a locking member forming part of said mandrel and including at least one hole, said locking member moveable from a first to a second position, wherein in said first position said at least one hole of said locking member is aligned with said at least one bore and said at least one shaft, allowing said at least one shaft to be freely insertable and removable; and in said second position said at least one hole being misaligned thereby locking said at least one shaft to said locking member. 14. A hole-saw assembly as in claim 13 wherein said locking member is biased to said second position. 15. A hole-saw assembly as in claim 13 wherein said assembly includes a base from which therein extend the at least one shaft, said base including a mounting means for mounting of a hole-saw thereon. 16. A hole-saw assembly as in claim 15 wherein said hole-saw includes a threaded inner bore adapted to engage a threaded outer projection extending from said base. 17. A hole-saw assembly as in claim 13, wherein said at least one shaft includes a flute adjacent said outer end and a cap on said outer end, the cap having an inner surface adapted to engage the locking member when said locking member is in said second position to thereby lock the at least one shaft from longitudinal movement from the locking member. 18. A hole-saw assembly as in claim 13, including a drill-bit mounted on said mandrel, said drill-bit extending through and beyond said hole-saw. 19. A hole-saw assembly including: a hole-saw having a longitudinal body with a plurality of cutting teeth at one end and a threaded inner bore at the other end; a base including a disk co-axially aligned with said hole-saw body and including a threaded projection extending longitudinally therefrom, said projection adapted to be engaged by said hole-saw threaded bore, said disk including at least one shaft extending in a longitudinal direction away from said hole-saw, said at least one shaft including a column adjacent said base, a flute adjacent said shaft outer end and a chamfered cap, the diameter of said cap equal to the diameter of said column; a mandrel co-axially aligned with said base and hole-saw and including a body having a drill bit extending therefrom, said drill bit passing through a central aperture in the base and said hole-saw, said mandrel further having at least one bore therethrough co-axially aligned with said at least one shaft of said base; an annulus resting on top of said base and being rotatable between a first and second position, said annulus further including at least one hole, wherein said at least one hole in the first position is aligned with the at least one bore in said mandrel and the at least one shaft of said base, and in said second position is misaligned, the thickness of the mandrel body and annulus being such that the flute is engaged by said annulus with the cap extending beyond the annulus so that when in said second position the annulus locks said at least one shaft in a relative longitudinal position. 20. A hole-saw assembly as in claim 19, said assembly including an inner and an outer hole-saw mounted on said mandrel, said inner hole-saw extending beyond said outer hole-saw.