Anti-contamination type elongated hand piece of a dental instrum

Details Anti-contamination type elongated hand piece of a dental instrum Anti-contamination type elongated hand piece of a dental instrum

1993-06-02

1994-08-23

Wilson, John J.

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

415904, A61C 105

Patent

active

053403126

ABSTRACT:
In order to prevent invading of blood, saliva and other impurities inside of an elongated hand piece of a dental instrument for preventing infection, the inside contamination-free elongated hand piece has rectilinear means in the airholes of upper and lower lids of its head housing, thereby assuring that air flowing out from the head housing is rectified to helical stream, thereby causing no Karman's vortex street behind. The rectilinear means may be given in the form of helical ridges or slots formed on the inner surface of each airhole.

REFERENCES:
patent: 3076267 (1963-02-01), Hoffmeister et al.
patent: 3175293 (1965-03-01), Borden

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