Patent US5340311A successfully refreshed from Google Patents.
US5340311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental handpiece
Assignee: Koyo Seiko Co Ltd
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Filing: 1993-11-16
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Granted: 1994-08-23
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Expires: 2013-11-16
Abstract
Abstract A dental handpiece comprises a handle section and a detachable head section. The head section to which a burr is mounted is made entirely of plastic except for ball bearings so that vibrations are absorbed via its own elasticity. The head section is disposed after use, thus avoiding the secondary infections of, for example, AIDS and hepatitis. A burr exchanging device for the handpiece is also disclosed.
Inventors
- 👤 Masatoshi Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:26
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; A61C1/08; A61C1/18; A61C1/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A burr exchanging device for a dental handpiece comprising hinged first and second sections which are respectively provided with a cavity that form a receptacle when said two sections are closed, said receptacle having a configuration corresponding to a cylindrical frame of a head section, of a dental handpiece and each one of said two sections having a burr guide and a pushing pin guide, and one of said two sections further having a burr remover and a burr presser which are provided on a supporting cord extending from said one of said two sections, said burr remover having a pushing pin and said burr presser having a tapered inner surface.
Claim 2
Dependent Claim
111 words
A burr exchanging device for a dental handpiece comprising hinged first and second sections which are respectively provided with a cavity that form a receptacle when said two sections are closed, said receptacle having a configuration corresponding to a cylindrical frame of a head section, of a dental handpiece and each one of said two sections having a burr guide and a pushing pin guide, and one of said two sections further having a burr remover and a burr presser which are provided on a supporting cord extending from said one of said two sections, said burr remover having a pushing pin and said burr presser having a tapered inner surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |