Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1980-09-08
1982-01-12
Peshock, Robert
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
A61C 108
Patent
active
043103103
ABSTRACT:
A dental handpiece assembly has a handle sleeve with an exterior notch formed in its exterior surface. The head of the handpiece is mounted to a shoulder sleeve, which sleeve has a locking extension with an end lug size to be received within the handle notch. A locking ring is rotatably mounted on the handle, and has a slot sized to allow the locking extension to extend through it so that the lug is received within the handle notch. The exterior surface of the lock ring is approximately flush relative to the adjacent exterior surfaces of the handle and shoulder. A spring mounted to the handle and to the lock ring biases the lock ring to be positioned to block removal of the lug from the handle notch. The spring is mounted within the lock ring and on the outside of a third sleeve projecting unitarily from the first sleeve. A bearing sleeve acts as a bearing for a drive rod that extends through the bearing to transmit driving force to the tool in the head of the handpiece. The bearing acts to hold the lock ring against axial movement relative to the handle. The lug has a curved end surface so that when the shoulder sleeve is moved towards the handle for mounting thereto, the curved surface of the lug contacts the edge of the handle notch to guide the lug into the notch, and simultaneously rotates the lock ring to allow passage of the lug into the notch.
REFERENCES:
patent: 2010421 (1935-08-01), Terry
patent: 2135933 (1938-11-01), Blair
patent: 2370632 (1945-03-01), Blair
patent: 2376295 (1945-05-01), Wahlberg
patent: 3665606 (1972-05-01), Saupe
patent: 3909946 (1975-10-01), Watanabe
patent: 3955284 (1976-05-01), Balson
patent: 4080737 (1978-03-01), Fleer
patent: 4123845 (1978-11-01), Fattaleh
patent: 4175323 (1979-11-01), Eibofner et al.
Peshock Robert
Young Dental Mfg. Co.
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