US4941828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental chuckless handpiece
Assignee: GC Corp
•
Filing: 1988-06-30
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Granted: 1990-07-17
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Expires: 2008-06-30
Abstract
Abstract A dental chuckless handpiece of the compressed air drive type includes a body having a head in which bearings are attached to the upper and lower portions of a shaft provided with a turbine impeller, and a rotary member fixedly provided to the lower end of the shaft is mounted in place through the upper and lower bearings. At least portions of the body excepting the head is formed of a synthetic resin discriminably colored with a color including transparent color.
Inventors
- 👤 Hiroshi Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/02; A61C1/00; A61C1/02; A61C1/05; A61C1/08; A61C1/14; A61C1/141
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A dental chuckless handpiece of the compressed air drive type, including a body having a head in which bearings are attached to the upper and lower portions of a shaft provided with a turbine impeller, and a rotary member having a cutting tool fixedly provided to the lower end of said shaft is mounted in place through said upper and lower bearings; at least portions of said body excepting said head being formed of a synthetic resin discriminably colored with a color including transparent color.
Claim 2
Dependent Claim
85 words
A dental chuckless handpiece of the compressed air drive type, including a body having a head in which bearings are attached to the upper and lower portions of a shaft provided with a turbine impeller, and a rotary member having a cutting tool fixedly provided to the lower end of said shaft is mounted in place through said upper and lower bearings; at least portions of said body excepting said head being formed of a synthetic resin discriminably colored with a color including transparent color.
Claim 3
Dependent Claim
17 words
A handpiece as defined in claim 1, wherein said rotary member is detachably mounted in said head.
Claim 4
Dependent Claim
24 words
A handpiece as defined in claim 1 or 2, wherein said head having said rotary member mounted therein is removably attached to said body.
Claim 5
Dependent Claim
26 words
A handpiece as defined in claim 3, wherein said rotary member comprises an integral piece of said shaft having said turbine impeller and said cutting tool.
Claim 6
Dependent Claim
29 words
A handpiece as defined claim 3, wherein said rotary member comprises said shaft having said turbine impeller, and said cutting tool which is formed separately therefrom and fixed thereto.
Claim 7
Dependent Claim
32 words
A handpiece as defined claim 3, wherein said rotary member comprises said turbine impeller, said shaft and said cutting tool which are formed separately from each other and fixed to each other.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |