US3747216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Andodontic instrument for concurrent programmed boring, spraying and cleansing of dental root channels
Assignee: Cooperative Industriale Romagnola SRL
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Filing: 1971-12-02
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Granted: 1973-07-24
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Expires: 1991-12-02
Abstract
Abstract An endodontic instrument combining boring, spraying and cleansing means for concurrent operations in root channels by a programmed treatment, said instrument including novel electro-mechanical means for imparting to the boring tool a composite reciprocating rotational motion on an arc of a chord of about 90 DEG and a uniform continuous rotary motion, the continuous rotary motion being converted to rectilinear translational motion. A suction chamber is part of the instrument and sucks off the solutions used in treatment.
Inventors
- 👤 E Bassi
- 👤 F Riitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:30
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/18; A61C1/185; A61C1/02; A61C1/07; A61C17/00; A61C17/02; A61C17/0208
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
An endodontic instrument for concurrent operations in boring, spraying and cleansing of dental root channels, comprising in combination: a frusto-conical tool head including means for sealing said head to the top of the tooth whose root channels are to be treated; electromagnetic means within said tool head including converting means and a boring tool in a bushing in the head, said electromagnetic means imparting a composite motion of a rotational motion and a reciprocating motion through an arc on a chord of about 90* and a uniform rotary motion to said boring tool, while said converting means translates said uniform rotary motion into a uniform rectilinear motion in a direction parallel to the axis of rotation of the rotational reciprocating motion of said boring tool; at least two conduits for delivering different treating solutions tO the proximity of the boring tool for radicular channel spraying; and at least one suction or vacuum chamber whose inlet is positioned in and along the frustro-conical surfaces, of said head.
Claim 2
Dependent Claim
166 words
An endodontic instrument for concurrent operations in boring, spraying and cleansing of dental root channels, comprising in combination: a frusto-conical tool head including means for sealing said head to the top of the tooth whose root channels are to be treated; electromagnetic means within said tool head including converting means and a boring tool in a bushing in the head, said electromagnetic means imparting a composite motion of a rotational motion and a reciprocating motion through an arc on a chord of about 90* and a uniform rotary motion to said boring tool, while said converting means translates said uniform rotary motion into a uniform rectilinear motion in a direction parallel to the axis of rotation of the rotational reciprocating motion of said boring tool; at least two conduits for delivering different treating solutions tO the proximity of the boring tool for radicular channel spraying; and at least one suction or vacuum chamber whose inlet is positioned in and along the frustro-conical surfaces, of said head.
Claim 3
Dependent Claim
49 words
An endodontic instrument as claimed in claim 1, wherein said converting means for converting said uniform continuous rotary motion to a uniform rectilinear translational motion leaves the rotational reciprocating motion unaltered and includes kinematic connecting means for transmitting said composite motion from the electromechanical means to said converting means.
Claim 4
Dependent Claim
37 words
An endodontic instrument as claimed in claim 2, including a revolution counter for counting the number of revolutions per minute of the uniform rotary motion which is proportional to the uniform rectilinear movement of said boring tool.
Claim 5
Dependent Claim
22 words
An endodontic instrument as claimed in claim 2, including a suction chamber connected to the remaining instrument body by resilient connecting means.
Claim 6
Dependent Claim
97 words
An endodontic instrument as claimed in claim 2, wherein said electromechanical means comprises; a gear reducing unit having a shaft; a first disc having a hub which is keyed on said shaft; two electromagnets positioned on said disc to provide opposed pole pieces; a rocker rod pivoted on said disc inserted between said pole pieces for engaging a second disc; a second disc carried on the hub of the first disc for freely idly rotating on said first disc hub; and said kinematic connecting means for driving said converting means being fastened securely to said second disc.
References Cited (Backward Citations)
US3578745A
Cited
US3556669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |