Handle adapter and chuck apparatus for power bits
OwnerJ. Richard Martindellinventor
Life of this patent
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Abstract
Handle adapter and chuck apparatus for a power bit includes a quick release chuck having a spindle with a longitudinally extending bore in the spindle adapted to receive the shank of the power bit. A radially extending bore extends through the spindle and communicates with the bore. A ball is disposed in the bore and contacts a portion of the shank of the power bit disposed in the bore. A spring biased sleeve is disposed about the spindle and includes a tapered bore which bears against the ball to bias the ball against the shank of the tool.
Claims19
Hand tool apparatus including a handle for a tool bit having a non-circular shank and having a groove extending circumferentially about the shank with a flat center portion and a radiused portion on the groove, comprising, in combination:
- spindle means including
- a non-circular bore having an inner end for receiving the non-circular shank of the tool bit,
- a radial bore communicating with the non-circular bore, and
- a ball having a radius substantially the same as, or slightly less than, the radiused portion of the groove of the tool bit disposed in the radial bore and extendable into the non-circular bore and against the radiused portion of the groove of the shank of the tool bit for locking the tool bit within the non-circular bore and against the inner end of the non-circular bore;
- sleeve means disposed about the spindle means, and including
- a front bore disposed about the spindle means,
- a conically tapered bore disposed adjacent to the radial bore and disposed against the ball, and
- a rear bore adjacent to the conically tapered bore for receiving the ball when the ball is moved out of the non-circular bore;
- and
- spring means for biasing the sleeve means against the ball whereby the conically tapered bore contacts the ball to apply normal and tangential forces against the radiused portion of the shank to lock the bit in the non-circular bore and against the inner end of the non-circular bore to prevent longitudinal movement of the tool bit.
Adapter apparatus for holding a tool bit having a shank and a circumferentially extending groove with a radiused portion and a flat portion, comprising, in combination:
- spindle means, including
- a first bore, having an inner end, for receiving the shank of the tool bit,
- a radial bore communicating with the first bore, and
- a ball having a radius substantially the same as the radiused portion of the groove of the shank of the tool bit and extendable into the first bore and against the radiused portion of the groove of the shank of the tool bit for locking the tool bit within the first bore and against the inner end of the first bore;
- sleeve means disposed about the spindle means, and including
- a front bore extending about the spindle means,
- a conically tapered bore disposed adjacent to the radial bore and against the ball, and
- a rear bore adjacent to the conically tapered bore for receiving at least a portion of the ball when the ball is moved out of the first bore for inserting and removing the tool bit;
- and
- spring means for biasing the sleeve means against the ball to caused the conically tapered bore to contact the ball to apply normal and tangential forces against the radiused portion of the groove of the tool bit shank to lock the tool bit in the first groove and against the inner end of the first bore to prevent longitudinal movement of the tool bit.
Dependencies are inferred from the claim text.