Anti-microbial apparatus and method for dental handpieces

• US 5,480,302 A
• Filed: 11/07/1994
• Issued: 01/02/1996
• Est. Priority Date: 12/03/1993
• Status: Expired due to Fees

• Current Assignee: Gull Laboratories, Inc. (Meridian Bioscience, Inc.)
• Original Assignee: Gull Laboratories, Inc. (Meridian Bioscience, Inc.)
• Inventors: Fife, Richard K.
• Primary Examiner(s): WEHNER, CARY ELLEN
• Application Number:
  US08/335,618
• Time in Patent Office: 421 Days
• Field of Search: 433/32, 433/104, 433/116, 604/163, 604/171, 604/263, 206/363, 206/364, 206/368, 206/369, 206/438, 206/439, 206/63.5, 422/20, 422/28, 422/300, 422/292, 422/307
• US Class Current: 433/116
• CPC Class Codes: A61C 1/16 Protecting caps for hand-pieces or angle-pieces

Abstract

A multiple stage anti-microbial apparatus and methods are disclosed, which provide capacity to process a handpiece between patients including soaking, de-overburdening via use of ultrasonic energy, treating with exposing to anti-microbial heat, accommodating coordinated though separate autoclaving, and accommodating contiguously packaging in a heat shrunk sheath after multiple anti-microbial treatment to prevent later contamination through the air. The distal portion of the heat shrunk sheath is initially removed along weakened paths to expose the operative head of the handpiece, accommodating grasping of the handpiece handle through the remainder of the sheath during use of the handpiece on the patient. After such use, the remainder of the sheath is removed along a weakened path and discarded.

The anti-microbial apparatus comprises a portable casing with one or more exterior lids or covers. An ultrasonic basin provides a bath for soaking, liquid anti-microbial activity and removal of debris. A heat chamber accommodates facile manual introduction and movement therein of the distal end and a substantial portion of the handle of the handpiece, following the bath treatment, to dry and expose the handpiece to anti-microbial heat and anti-contamination sheath upon the handpiece.

Claims

1. In combination, an unattached medical or dental handpiece and an anti-contamination collapsible sheath, the handpiece comprising an exterior surface, a distal work-performing end, and a proximal end;

the sheath being contiguously shrunk upon the exterior surface of the handpiece and comprising a closed distal end portion and a second portion disposed proximal of the distal end portion, the distal end portion being connected to the second portion at a circumferential tear line accommodating manual detachment along the circumferential tear line of the distal end portion and removal of the distal end portion from the handpiece thereby exposing the work-performing end of the handpiece, leaving the second portion contiguous with the handpiece for grasping the handpiece through the second portion.

2. The combination of claim 1 wherein the distal end portion of the sheath comprises a pull tab formed as one piece with the sheath to enhance separation of the distal end portion from the second portion.

3. The combination of claim 1 wherein the second portion of the sheath comprises at least one longitudinally-directed tear line for removal of the second portion when use of the handpiece on the patient has been completed.

4. The combination of claim 3 wherein the second portion comprises a pull tab formed as one piece with the sheath to enhance separation of the longitudinal tear line.

5. The combination of claim 1 wherein at least a portion of the sheath comprises transparent synthetic resinous material.

6. The combination according to claim 1 wherein the sheath comprises two spaced crease lines accommodating storage of the sheath prior to use in a flat condition.