Dental handpiece
AssigneeYoung Dental Manufacturing Company
InventorRonald L. Bailey
Life of this patent
Estimating the term…
Abstract
A dental hand piece including a closed top housing, a bur tube therein which consists of an integral gear and sleeve, the sleeve having an inwardly-projecting boss to engage a bur and drive it, a resiliently releasable member to hold the bur in the tube against accidental displacement, and a positive retaining member to prevent removal of the tool during operation, so that a dental tool can, by insertion into the tube, and by the rotation of the bur tube, be rotated and also secured in the tube.
Claims18
In a dental handpiece comprising an instrument holder, having a tubular recess to receive a dental instrument with a shaft insertable in the recess the holder having releasable holding means to secure the dental instrument in the recess of the instrument holder to prevent the instrument's removal but releasable to allow removal by a pull of the finger, the hollow also having a drive means for engagement with the instrument to rotate the dental instrument with the instrument holder, and the holder having additional means rendered aperature by operation of the drive means to prevent the removal of the instrument while the instrument holder and instrument are in motion.
In a dental handpiece for use in rotating an elongated dental tool that has a driven surface engageable to rotate it, and that has a transverse overhang;
- the handpiece having a bur tube with means thereon to engage the driven surface of the tool and means to underlie the overhang;
- the means to engage the driven surface having fixed angular relation to the means to underlie the overhang, that angular relation being such that when the tool and handpiece are relatively rotated, the drive means will not engage the driven surface until the means to underlie the overhang has fitted under the same, whereby during drive of the tool it cannot be withdrawn from the handpiece.
In a dental handpiece;
- an instrument holder comprising a tube with a unitary driven gear, releasable holding means to secure a dental instrument having a conventional flat in the instrument holder to prevent the instrument's removal but releasable to allow removal by a pull of the fingers comprising a latch arm formed by slots in the tube of the instrument holder, means to rotate the dental instrument with the instrument holder comprising a first inward projection unitary with the tube adapted to engage the flat of the dental instrument, means to prevent the removal of the instrument while the instrument holder and the instrument are in motion comprising a second inward projection unitary with the tube, and means to limit the outward displacement of the latch arm comprising a bearing sleeve which contacts the upper end of the tube.
In a dental handpiece:
- an instrument holder comprising a tube with a unitary gear, means to rotate a dental instrument having a conventional flat with the instrument holder comprising a first inward projection unitary with the tube adapted to engage the flat of the instrument, means to prevent the removal of the instrument while the instrument and instrument holder are in motion comprising a second inward projection unitary with the tube, and removable means for holding the instrument holder in the handpiece, comprising a single unit cap at the bottom of the handpiece whereby removal of the cap permits removal of the instrument holder from the handpiece.
In a dental handpiece using a dental instrument having a conventional flat and a transverse overhang, an instrument holder including a tube, releasable holding means to retain the instrument in the tube, but being releasable to allow removal of the instrument by a pull of the fingers, the holding means including a latch arm unitary with the tube;
- means to rotate the dental instrument with the instrument holder including an inward projection unitary with the tube adapted to engage the flat of the instrument;
- the instrument holder having means to prevent removal of the instrument while the instrument holder and instrument are in motion including an inward projection unitary with the tube adapted to engage the instrument shank beneath the overhang to prevent the instrument's removal.
In a dental handpiece, an instrument holder including a tube, means adapted to rotate a dental instrument having a cylindrical shank section and a conventional flat comprising a first inward projection unitary with the tube adapted to engage the flat of the dental instrument, and with means to prevent the removal of the instrument while the instrument holder and the instrument are in motion including a second inward projection unitary with the tube adapted to engage the instrument shank in a manner to prevent its removal, the tube having means to guide the rotation of the dental instrument including a cylindrical bore adapted to telescopically receive a portion of the cylindrical shank of the instrument, and a cylindrical exterior adapted to be received in a cylindrical bore.
In a dental handpiece, an instrument holder including a tube, with means to rotate a dental instrument having a cylindrical shank section and a conventional flat comprising a first inward projection unitary with the tube adapted to engage the flat of the dental instrument, and with means to prevent the removal of the instrument while the instrument holder and instrument are in motion including a second inward projection unitary with the tube adapted to engage the instrument shank in a manner to prevent its removal, and with means to guide the rotation of the instrument including a cap adapted to be attached to the bottom of the handpiece, and having a bore which receives a portion of the cylindrical shank of the instrument.
Dependencies are inferred from the claim text.