US4616667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth cleaning implement
Assignee: Individual
•
Filing: 1983-10-17
•
Granted: 1986-10-14
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Expires: 2003-10-17
Abstract
Abstract An improved hand held dental instrument adapted for cleaning teeth is provided which, in its preferred form, comprises an elongated shaft and an angularly projected head, the head being provided with a longitudinal groove in the head's upper planar surface and being tapered so as to form a thin, flat tip suitable for deformation in a direction and manner to easily reach teeth crevices without sacrificing longitudinal rigidity of the head. The opposite end of this integrally formed device's shaft is provided with a second tapered tip, which may be similarly grooved, and is adapted for cleaning of tooth surfaces.
Inventors
- 👤 I. Ping Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:40
CPC Classifications
A; A61; A61C; A61C15/00; A61C15/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
216 words
A dental instrument for cleaning teeth which comprises: an elongated shaft having an upper end and a lower end, said lower end being provided with a first tapered portion which is tapered to a first tip and which is provided with at least one planar surface thereon, said shaft additionally comprising a linking shaft member at the upper end of said shaft, said linking shaft member being angularly disposed from said shaft; and a head portion which is integrally joined to the upper end of said linking shaft member and which projects angularly therefrom, said head portion having at least one planar surface thereon and being tapered to a second tip, at least one of said planar surfaces in at least one of said first tapered portion and said head portion being further provided with longitudinal groove means for increasing the flexibility and tooth cleaning efficiency of the associated said tip, said first tapered portion and said head portion being each integrally formed from a material selected from the group consisting of a thermoplastic material and a thermosetting material said head portion, said linking shaft member and said shaft being in an angular relation to one another such that said head portion projects outwardly at an angle from 70 to 135 degrees relative to said shaft.
Claim 2
Dependent Claim
216 words
A dental instrument for cleaning teeth which comprises: an elongated shaft having an upper end and a lower end, said lower end being provided with a first tapered portion which is tapered to a first tip and which is provided with at least one planar surface thereon, said shaft additionally comprising a linking shaft member at the upper end of said shaft, said linking shaft member being angularly disposed from said shaft; and a head portion which is integrally joined to the upper end of said linking shaft member and which projects angularly therefrom, said head portion having at least one planar surface thereon and being tapered to a second tip, at least one of said planar surfaces in at least one of said first tapered portion and said head portion being further provided with longitudinal groove means for increasing the flexibility and tooth cleaning efficiency of the associated said tip, said first tapered portion and said head portion being each integrally formed from a material selected from the group consisting of a thermoplastic material and a thermosetting material said head portion, said linking shaft member and said shaft being in an angular relation to one another such that said head portion projects outwardly at an angle from 70 to 135 degrees relative to said shaft.
Claim 3
Dependent Claim
22 words
The dental instrument according to claim 1 wherein said shaft is characterized by a transverse cross-section having from three to eight sides.
Claim 4
Dependent Claim
18 words
The dental instrument according to claim 2 wherein said shaft is characterized by a substantially rectangular transverse cross-section.
Claim 5
Dependent Claim
61 words
The dental instrument according to claim 1 wherein said first and second tip are each characterized by having a flat, thin cross-section, and are each rounded, and wherein said planar surfaces of said first tapered portion and said head portion are each provided with longitudinal grooves which occupy at least about fifty percent of the area of said grooved planar surfaces.
Claim 6
Dependent Claim
50 words
The dental instrument according to claim 4 wherein each said groove is characterized at any point along said groove by a depth of from about 10 to 80% of the thickness of the associated said first tapered portion and said head portion, as determined at said point along said groove.
Claim 7
Dependent Claim
56 words
The dental instrument according to claim 1 wherein said angle is substantially a right angle, said shaft is characterized by a substantially rectangular transverse cross-section, and each of said first tapered portion and said head portion are provided with a substantially planar upper surface in which a longitudinal groove means for providing said flexibility is disposed.
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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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |