Percussion instrument

Details Percussion instrument Percussion instrument

1983-03-30

1984-11-13

Wilson, John J.

Dentistry

Method or material for testing, treating, restoring, or...

433 72, 433121, 433 29, 128776, 173120, A61C 500

Patent

active

044823240

ABSTRACT:
A percussion instrument suitable for use in dental practice for determining the degree of looseness of a tooth has a ram displacably seated in the handpiece and a means for accelerating the ram from an initial position to a defined velocity, the ram subsequently moving toward a test object in free flight with a constant velocity. The ram is returned to its initial position with the assistance of a magnetic field. The ram is in the form of an elongated oscillating lever having a pivot axis located at its center of gravity, the axis being disposed at a right angle relative to a longitudinal axis of the instrument. The ram has a test head at one end thereof which is disposed at an angle, such as a right angle, with respect to the lever portion of the ram.

REFERENCES:
patent: 165701 (1875-07-01), Bilharz
patent: 734387 (1903-07-01), Woodworth
patent: 3094115 (1963-06-01), Polin
patent: 3653373 (1972-04-01), Batterman
patent: 3683503 (1972-08-01), Klein
patent: 3782188 (1974-01-01), Korber et al.
patent: 3972122 (1976-08-01), Sutter
patent: 4034476 (1977-07-01), Johnson
patent: 4058115 (1977-11-01), Forster
patent: 4192321 (1980-03-01), Korber et al.
patent: 4340069 (1982-07-01), Yeaple

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