Nose piece adaptors for manual or power feed drills
AssigneeBritish Aerospace PLC
InventorRussell Spencer
Life of this patent
Estimating the term…
Abstract
The invention concerns a nose piece adaptor for a manual or power feed drill. The adaptor has a hollow cylindrical sleeve (11) surrounding the drill bit and having on the outer surface of one end thereof a taper lock (13) for engagement with location studs (17) in a template (16). At its other end the sleeve (11) can be threadedly engaged or integral with the drill. The sleeve (11) has a sprung, quick-release ball (25) lock mechanism for engaging with or disengaging from a peripheral locking groove (26) of a nose piece (14) inserted into the bore of the sleeve (11). The nose piece (14) is a simple cylindrical rod with a bore (30) for the drill bit.
Claims9
In combination, a nose piece adaptor for use with a drill and with a template having a plurality of differently sized holes for receiving a nose piece bushing with a drill bit therewithin, the template having location stud means around each said hole, the nose piece adaptor comprising:
- a hollow cylindrical sleeve for attachment to the drill, the sleeve including an internal bore for receiving a said bushing therewithin,
- locking means on said sleeve displaceable between a locking position in which a said bushing inserted into said bore is lockingly engaged and a release position in which a said bushing is freely insertable into and releasable from said bore;
- taper lock means attached to the external surface of one end of said sleeve for locking engagement with the said location stud means of said template;
- and
- said bushing is a substantially plain cylindrical rod having a central axial bore for receiving a said drill bit, and nose piece locking means for quick-releasable engagement with said sleeve locking means.
The combination according to claim1, wherein the said locking means includes at least one ball movably mounted in apertures formed in the sides of the said sleeve and adapted lockingly to engage in a groove formed in said bushing nose piece in said locking position.
In combination, a nose piece adaptor for use with a drill and with a template having a plurality of differently sized holes for receiving a nose piece bushing with a drill bit therewithin, the template having location stud means around each said hole, the nose piece adaptor comprising:
- a hollow cylindrical sleeve for attachment to the drill, the sleeve including an internal bore for receiving a said bushing therewithin,
- locking means on said sleeve displaceable between a locking position in which a said bushing inserted into said bore is lockingly engaged and a release position in which a said bushing is freely insertable into and releasable from said bore,
- taper lock means attached to the external surface of one end of said sleeve for locking engagement with the said location stud means of said template;
- and
- said bushing forming part of a set of nose piece bushings of substantially identical configuration but differing diameters,
- each of the bushings of the set being an elongated cylindrical rod,
- a central bore formed in said rod for receiving a said drill bit, and lubricant bores extending along said rod from one axial end thereof to the other axial end thereof, and
- at least one external circumferential groove formed in said rod to receive at least one locking member forming part of the locking means of said sleeve.
Dependencies are inferred from the claim text.