Drilling machines
AssigneeRotabroach Limited
InventorRalph Stych
Life of this patent
Estimating the term…
Abstract
A drilling machine for drilling holes in the ends of rails for a railway track to receive fishplate bolts, has a base 12 on which is provided a former 20 adapted to the profile of the rail 10. A clamping jaw 18 is connected by a clamping mechanism 16 for clamping the base 12 to the rail. An electric drill 20 is slidably supported on a column 14 on the base 12. An annular hole cutter 26 on the drill spindle 24 drills a hole through the web 40 of the rail 10. The former 30 accurately locates the drilling axis laterally with respect to the rail 10 and a respective end of the former 30 can be aligned with the rail end when clamping the machine to the rail in order that the drill axis will be accurately located longitudinally of the rail.
Claims13
A drilling machine for in situ drilling of a hole in the web of a double-flanged rail for a railroad track, comprising a base, a column at one side thereof, said base comprising at an opposite side thereof a former shaped to be received between, and thereby located laterally by, the flanges of said rail, said former comprising a body which is accurately shaped in profile so as to match a profile of the double flanged rail, and a stop means for locating one end of said body at a selected rail end;
- clamp means comprising a clamping jaw, means movably connecting said jaw to said base for displacement so as to engage the web of said rail opposite the former and actuating means for said clamping jaw whereby to clamp said base on to said rail;
- an electric power drill mounted on said column and having a drill spindle extending substantially perpendicularly to said base;
- and an annular cutter supported on the end of said spindle for cutting a hole through the web of said rail in the region of the base and the clamping jaw;
- the strength of said clamping jaw, said connecting means, said actuating means, said base and said former being so chosen in relation to the weight of said drilling machine and the power of said power drill that said clamp means is sufficient in itself to maintain said drilling machine in position during drilling.
A drilling machine for in situ drilling of a hole in the web of a double-flanged railroad track, comprising a base;
- a column at one side thereof, said base comprising at an opposite side thereof a former shaped to be received between, and thereby located laterally by, the flanges of said rail, said former comprising a body which is accurately shaped in profile so as to match a profile of the double flanged rail, and a stop means located on one end of said body for positively engaging a rail end;
- clamp means comprising a clamping jaw, means movably connecting said jaw to said base for displacement so as to engage the web of said rail opposite the former and actuating means for said clamping jaw whereby to clamp said base on to said rail;
- an electric power drill mounted on said column and having a drill spindle extending substantially perpendicularly to said base;
- and an annular cutter supported on the end of said spindle for cutting a hole through the web of said rail in the region of the base and the clamping jaw;
- said former and said clamp means comprising the sole means of mounting said drilling machine.
A drilling machine for in-situ drilling of a hole in the web of a double-flanged rail for a railroad track, comprising a base, a column at one side thereof, said base comprising at an opposite side thereof a former shaped to be received between, and thereby located laterally by, the flanges of said rail, said former comprising a body which is accurately shaped in profile so as to match a profile of the double flanged rail, said body having first and second ends, and a stop member located on one of said body first and second ends for locating said body at a selected rail end, a clamping jaw, means movably connecting said jaw to said base for displacement so as to engage the web of the rail opposite the former, actuating means for said clamping jaw whereby to clamp said base on to said rail, an electric power drill mounted on said column and having a drill spindle extending substantially perpendicularly to said base, and an annular cutter supported on the end of said spindle for cutting a hole through the web of said rail in the region of the base and the clamping jaw.
Dependencies are inferred from the claim text.