US3716247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal chuck for use in a dental handpiece
Assignee: J Morita Manufaturing Corp
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Filing: 1970-12-11
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Granted: 1973-02-13
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Expires: 1990-12-11
Abstract
Abstract A metal chuck for use in a dental handpiece for holding a dental tool which comprises a tubular body and a plurality of claws integral with the body. The chuck is secured in the axial through bore of the air-turbine rotor enclosed in the handpiece. A dental tool is inserted through the tubular body to be secured by friction between the contacting surfaces of the body and the tool, with the claws resiliently clamping the tool thereby holding the same all the more securely in the chuck.
Inventors
- 👤 K Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:13
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/14; A61C1/142; A61C1/144; Y; Y10; Y10S; Y10S279/00; Y10S279/906; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17136; Y10T279/17153; Y10T279/17291; Y10T279/17316; Y10T279/17324
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
260 words
In combination, a rotary device which has a walled, open ended socket therein that is adapted to receive the shank of a dental handpiece to be driven thereby, and a chuck disposed in the socket to detachably engage the shank of the handpiece, which chuck is spaced apart from the bottom of the socket, in the direction of the open end thereof, and has a bore extending therethrough on the rotational axis of the device, that is adapted to frictionally but slidably engage with the shank as it is received in the socket, to permit the shank to be passed through the chuck, and inserted beyond the distal end of the bore into the space between the chuck and the bottom of the socket, there being a series of circumferentially spaced, axially extending, and axially inwardly curved claws extending into the space from the distal end of the chuck, which claws are spaced apart from the wall of the socket at the distal end portions thereof, by an open annular clearance therebetween, and have an inside diameter at the distal ends thereof, of less than that of the bore of the chuck, so that they are engaged by the shank when it is inserted into the socket beyond the bore of the chuck, but the claws are also resiliently yieldable to the shank, so that they flex into the clearance between the wall of the socket and the distal end portions of the claws, while exerting a clamping action on the shank so long as it resides between said portions.
Claim 2
Dependent Claim
260 words
In combination, a rotary device which has a walled, open ended socket therein that is adapted to receive the shank of a dental handpiece to be driven thereby, and a chuck disposed in the socket to detachably engage the shank of the handpiece, which chuck is spaced apart from the bottom of the socket, in the direction of the open end thereof, and has a bore extending therethrough on the rotational axis of the device, that is adapted to frictionally but slidably engage with the shank as it is received in the socket, to permit the shank to be passed through the chuck, and inserted beyond the distal end of the bore into the space between the chuck and the bottom of the socket, there being a series of circumferentially spaced, axially extending, and axially inwardly curved claws extending into the space from the distal end of the chuck, which claws are spaced apart from the wall of the socket at the distal end portions thereof, by an open annular clearance therebetween, and have an inside diameter at the distal ends thereof, of less than that of the bore of the chuck, so that they are engaged by the shank when it is inserted into the socket beyond the bore of the chuck, but the claws are also resiliently yieldable to the shank, so that they flex into the clearance between the wall of the socket and the distal end portions of the claws, while exerting a clamping action on the shank so long as it resides between said portions.
Claim 3
Dependent Claim
260 words
In combination, a rotary device which has a walled, open ended socket therein that is adapted to receive the shank of a dental handpiece to be driven thereby, and a chuck disposed in the socket to detachably engage the shank of the handpiece, which chuck is spaced apart from the bottom of the socket, in the direction of the open end thereof, and has a bore extending therethrough on the rotational axis of the device, that is adapted to frictionally but slidably engage with the shank as it is received in the socket, to permit the shank to be passed through the chuck, and inserted beyond the distal end of the bore into the space between the chuck and the bottom of the socket, there being a series of circumferentially spaced, axially extending, and axially inwardly curved claws extending into the space from the distal end of the chuck, which claws are spaced apart from the wall of the socket at the distal end portions thereof, by an open annular clearance therebetween, and have an inside diameter at the distal ends thereof, of less than that of the bore of the chuck, so that they are engaged by the shank when it is inserted into the socket beyond the bore of the chuck, but the claws are also resiliently yieldable to the shank, so that they flex into the clearance between the wall of the socket and the distal end portions of the claws, while exerting a clamping action on the shank so long as it resides between said portions.
Claim 4
Dependent Claim
260 words
In combination, a rotary device which has a walled, open ended socket therein that is adapted to receive the shank of a dental handpiece to be driven thereby, and a chuck disposed in the socket to detachably engage the shank of the handpiece, which chuck is spaced apart from the bottom of the socket, in the direction of the open end thereof, and has a bore extending therethrough on the rotational axis of the device, that is adapted to frictionally but slidably engage with the shank as it is received in the socket, to permit the shank to be passed through the chuck, and inserted beyond the distal end of the bore into the space between the chuck and the bottom of the socket, there being a series of circumferentially spaced, axially extending, and axially inwardly curved claws extending into the space from the distal end of the chuck, which claws are spaced apart from the wall of the socket at the distal end portions thereof, by an open annular clearance therebetween, and have an inside diameter at the distal ends thereof, of less than that of the bore of the chuck, so that they are engaged by the shank when it is inserted into the socket beyond the bore of the chuck, but the claws are also resiliently yieldable to the shank, so that they flex into the clearance between the wall of the socket and the distal end portions of the claws, while exerting a clamping action on the shank so long as it resides between said portions.
Claim 5
Dependent Claim
35 words
The combination according to claim 1 wherein the rotary device is defined by an elongated tube-like rotor having a stop in one end portion thereof, forming a socket that opens at the other end thereof.
References Cited (Backward Citations)
US495267A
Cited
US3499223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |