Drill-mountable tool for the installation and removal of threaded dental prosthetic elements

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Description

FIG. 1 is a top and front perspective view of a drill-mountable tool for the installation and removal of threaded dental prosthetic elements showing my new design;

FIG. 2 is a bottom and rear perspective view thereof; and

FIG. 3 is a bottom and side perspective view thereof, the opposite side being a mirror image of that shown.

Referenced Cited
U.S. Patent Documents
D246112 October 18, 1977 Biggs
D268615 April 12, 1983 Biggs
Other references
  • S. S. White Dental Mfg. Co. Catalogue, (1899), p. 97, Appliances for Mounting Tooth Crowns, #5 Drill Chuck.
Patent History
Patent number: D307472
Type: Grant
Filed: Oct 21, 1987
Date of Patent: Apr 24, 1990
Assignee: Astra Meditec Aktiebolog (Molndal)
Inventor: Per O. Soderberg (Stockholm)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Brian N. Vinson
Law Firm: White & Case
Application Number: 7/112,141
Classifications
Current U.S. Class: D24/16