Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1978-05-12
1980-05-13
Peshock, Robert
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
279 51, A61C 900
Patent
active
042021022
ABSTRACT:
A device of this invention for opening and closing a chuck for a dental handpiece comprises a housing and an output shaft rotatably journalled in the housing. A cylindrical hollow is formed axially from a top end portion into the output shaft and a plurality of openings are formed at equally spaced portions around said shaft near an innermost portion of the hollow. A truncated cone-shaped column having a conical surface is firmly inserted into the innermost hollow of the output shaft to define a space for a small metallic driving ball. The small driving ball is rotatably inserted into each opening of said output shaft, and a large metallic driven ball is rotatably inserted into the hollow to abut against these small driving balls. A ball control sleeve having a tapering inner periphery is slidably fitted on the output shaft to locate at the openings. A cylindrical pusher including an axially cylindrical hollow is slidably inserted into the hollow of the shaft, then a chuck for a dental tool is slidably inserted to abut against said pusher. A rear control sleeve having a pair of inwardly diametrically extending pushing lugs and a cylindrical cavity formed around an inner periphery thereof is slidably fitted onto the output shaft. A helically convoluted expansion spring is inserted into the cylindrical cavity to surround the housing. A front control sleeve having the same pushing lugs as those of the rear control sleeve is slidably fitted onto the housing to insert into the cavity against the expansion spring, thus enabling the dentist to easily exchange the dental tool.
REFERENCES:
patent: 1741734 (1929-12-01), Pannwitz
Nakanishi Dental Mfg. Co. Ltd.
Peshock Robert
LandOfFree
Device for opening and closing a chuck for a dental handpiece does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for opening and closing a chuck for a dental handpiece, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for opening and closing a chuck for a dental handpiece will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-923921