Patent US4286950A successfully refreshed from Google Patents.
US4286950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover for dental handpiece bur
Assignee: Individual
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Filing: 1980-03-24
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Granted: 1981-09-01
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Expires: 2000-03-24
Abstract
Abstract A cover for a dental handpiece end and a bur positioned thereon, the cover forms a resilient boot-like structure of generally L-shape having an enlarged leg portion with an open end adapted to engage the end of a dental handpiece and an open ended foot portion adapted to encompass a dental drill or bur on the handpiece end, the boot is split on a line extending from the foot portion open end to the enlarged leg open end on its inner surface to facilitate engagement with the handpiece.
Inventors
- 👤 Gene R. Hawk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:54
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A cover for a dental handpiece end and a bur or other tool positioned thereon, which bur extends substantially at a right angle to the longitudinal axis of the handpiece, comprising a tubular boot-like structure of generally L-shape, having an enlarged leg portion with an open end adapted to engage the end of a dental handpiece and an open ended smaller diameter foot portion adapted to encompass the handpiece end and a dental drill or bur positioned thereon, said structure being split on a line extending continuously from the foot portion open end to the enlarged leg open end on the inner surface of the L-shaped structure said structure having some resilience and flexibility to enable it to be sprung into and out of engagement with the handpiece end and tool thereon.
Claim 2
Dependent Claim
132 words
A cover for a dental handpiece end and a bur or other tool positioned thereon, which bur extends substantially at a right angle to the longitudinal axis of the handpiece, comprising a tubular boot-like structure of generally L-shape, having an enlarged leg portion with an open end adapted to engage the end of a dental handpiece and an open ended smaller diameter foot portion adapted to encompass the handpiece end and a dental drill or bur positioned thereon, said structure being split on a line extending continuously from the foot portion open end to the enlarged leg open end on the inner surface of the L-shaped structure said structure having some resilience and flexibility to enable it to be sprung into and out of engagement with the handpiece end and tool thereon.
Claim 3
Dependent Claim
35 words
A cover for a dental handpiece bur as in claim 1, where said foot portion is of roughly conical shape and tapers inwardly towards its open end to encompass but be spaced from the bur.
Claim 4
Dependent Claim
52 words
A cover for a dental handpiece bur as in claim 1, where said leg portion open end is of circular shape and is of smaller diameter than a portion of the cover connecting said leg portion and said foot portion to aid in retaining the cover in engagement with the handpiece end.
Claim 5
Dependent Claim
45 words
A cover for a dental handpiece bur as in claims 1 or 2, where said split comprises a straight line slot in the wall of the boot-like structure extending completely from the open end of said leg to the open end of said foot portion.
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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |