Disposable dental drill assembly

A disposable self-contained dental drill assembly comprising a housing and a rotor member rotatably carried therein, said rotor member including turbine blade means and being fixedly non-removably secured to the end of a dental burr, said housing including interlocking means for removably coupling said dental drill assembly to a handle.

A dental handle including a generally cylindrical member formed with an offset neck portion at one end thereof, said neck portion being formed with coupling means for removably coupling said handle to a disposable drill assembly, the other end of said cylindrical member being formed with connecting means for connecting said handle to a flexible conduit, said coupling means including a reduced diameter tip extending from said neck portion, said tip including a peripheral groove intermediate its ends in which is carried a compressible retaining ring, an air passage extending through said handle from said other end of said cylindrical member to the end of said neck portion, and a water passage extending from said other end of said cylindrical member to the outer wall of said neck portion adjacent said end thereof.

A dental handpiece including a handle and a self-contained dental drill assembly, said dental drill assembly including a housing and a rotor member rotatably mounted therein, said rotor member being formed with turbine blades and being fixedly secured to the end of a dental burr, said housing being removably connected to said handle by interlocking coupling means, said handle being formed with a passage in communication with a passage in said housing, said passage in said housing being arranged to direct a fluid against said turbine blades to rotate said rotor member, said handle being formed with a counterbore and said dental drill assembly being formed with a cylindrical extension received in said counterbore, said counterbore being formed with projections and said cylindrical extension being formed with slots in interlocking engagement with said projections.

A dental handpiece including a handle and a self-contained dental drill assembly, said dental drill assembly including a housing and a rotor member rotatably mounted therein, said rotor member being formed with turbine blades and being fixedly secured to the end of a dental burr, said housing being removably connected to said handle by interlocking coupling means, said handle being formed with a passage in communication with a passage in said housing, said passage in said housing being arranged to direct a fluid against said turbine blades to rotate said rotor member, said handle including a compressible retaining ring and said dental drill assembly including a seat in which said retaining ring is received to resist relative movement between said handle and said dental drill assembly.

A dental handpiece including a handle and a self-contained dental drill assembly, said dental drill assembly including a housing and a rotor member rotatably mounted therein, said rotor member being formed with turbine blades and being fixedly secured to the end of a dental burr, said housing being removably connected to said handle by interlocking coupling means, said handle being formed with a passage in communication with a passage in said housing, said passage in said housing being arranged to direct a fluid against said turbine blades to rotate said rotor member, and locating means for orienting said dental drill assembly relative to said handle.

A disposable self-contained dental drill assembly comprising a housing and a rotor member rotatably carried therein, said rotor member including turbine blade means and being fixedly secured to the end of a dental burr, said housing including interlocking means for removably coupling said dental drill assembly to a handle, said means for removably securing said dental drill assembly to a handle including an opening formed through said housing, said opening being formed with an interlocking configuration.