Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1984-11-15
1985-10-01
Wilson, John J.
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
433125, A61C 107
Patent
active
045443564
ABSTRACT:
A dental prophylactic device has a handle section containing a drive member and a driven section at a substantial angle to the handle section containing a driven member also at an angle to the driving member. The handle section includes a longitudinally oscillatable cam follower supported parallel to the handle axis. When the cam follower is translated around the axis by the rotation of the drive shaft, it is caused to oscillate by one end contacting the stationary cam follower track. The other end engages a slot parallel to the axis of a cam at an angle to the cam follower thereby causing the cam to oscillate back and forth over an arc of at least 50.degree. to approximately 150.degree., maintaining the connection between the cam follower and the cam by the use of the slot which permits the cam follower, in effect, to move up and down with respect to the cam as it oscillates. The cam oscillates a cup which may contain prophylactic material and the reversing action limits the ability of the material to be thrown out of the cup and obviates unintended movement of the cup over the surface of a tooth which occurs in the case of rotation in a single direction. A special sealing ring and its compartment, remotely located from the head of the spindle, provides an excellent seal.
REFERENCES:
patent: 733398 (1903-07-01), Joseph
patent: 1711846 (1929-05-01), Heilborn
patent: 2135933 (1938-11-01), Blair
patent: 3555685 (1971-01-01), Loge
patent: 4371341 (1983-02-01), Nakanishi
Alfano Michael
Chang Tiang-Shing
Ciepierski Casimir
Gardella John M.
Block Drug Company Inc.
Wilson John J.
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