Apparatus for preventing interior contamination of hand-piece

Details Apparatus for preventing interior contamination of hand-piece Apparatus for preventing interior contamination of hand-piece

1988-12-14

1991-12-24

O'Connor, Cary E.

Dentistry

Apparatus

Including activator or regulator for controller or drive

A61C 102

Patent

active

050747878

ABSTRACT:
This apparatus is capable of preventing contamination in the interior of an airturbine hand-piece and its drive for use in dental treatment such as cutting a tooth. The apparatus comprises an airturbine drive air circuit, a discharge air circuit, and a chip air circuit for vaporizing cooled water, which serve as passageways for air at a relatively high pressure when the hand-piece is in operation and which are kept interiorly at a low air pressure when the hand-piece is out of operation. These passageways and change-over valves therefore are incorporated in a single body. When the hand-piece is inoperative upon completion of the treatment, it is possible to prevent various germs from penetrating from outside into the interior of the hand-piece. The apparatus can be reduced in a compact size and can be formed of plastics.

REFERENCES:
patent: 3511264 (1970-05-01), Krantz
patent: 3903916 (1975-09-01), Waletzko

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