Portable dental drill

  • US 3,109,238 A
  • Filed: 11/28/1961
  • Issued: 11/05/1963
  • Est. Priority Date: 11/28/1961
  • Status: Expired due to Term
First Claim
Patent Images

1. A PORTABLE DENTAL DRILL COMPRISED OF AN ELONGATED CASING HAVING A REARWARD AND A FORWARD SECTION, SAID FORWARD SECTION HAVING A CONCAVE FORWARD END, A COUPLING ADAPTED TO REMOVABLY CONNECT SAID SECTIONS IN AXIALLY ELONGATED RELATION, A BATTERY HOUSED WITHIN SAID REARWARD SECTION, AN ELECTRIC MOTOR WHOLLY MOUNTED WITHIN SAID REARWARD SECTION, A RHEOSTAT FOR CONTROLLING THE SPEED OF SAID ELECTRIC MOTOR AND A SLIDABLE CONTACTOR COOPERATIVELY RELATED THEREWITH, SAID SLIDABLE CONTACTOR BEING SURFACEDLY POSITIONED WITHIN SAID CASING AND MANUALLY REGUALTED THEREFROM, A DRIVE SHAFT EXTENDING FROM SAID MOTOR AND PROJECTING INTO AND AXIALLY OF SAID FORWARD SECTION, SOCKET MEANS DISPOSED TERMINALLY OF THE SAID DRIVE SHAFT, AN EXTENSION ADAPTER AXIALLY DISPOSED FOR ROTATION WITHIN THE

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