US4392827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained root canal heated condenser dental instrument
Assignee: Individual
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Filing: 1981-11-04
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Granted: 1983-07-12
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Expires: 2001-11-04
Abstract
Abstract The invention is an improved dental instrument for root canal condensation dental work. The instrument is self-contained in that it is a combination tool used as a spreader, a condenser, and a filling material heating unit, each of which is alternately and/or concurrently useable while inserted within the root canal structure of a patient. The invention provides several embodiments, each of which comprises: a plugger component (which use combines the functions of a spreader, a condenser, and a material heating unit); a handle component affixed to the plugger component; a power supply component for producing heat; and a transmission component for transmitting heat produced by the power supply component to the material heating unit of the plugger component. The transmission component has a conveniently located finger operation switch to interrupt the power supply and cut off the flow of heat. The plugger component is provided in a range of sizes to fit the range of internal sizes in different parts of the root canal.
Inventors
- 👤 Howard Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:11
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/50; A61C2204/00; A61C2204/002; A61C5/55
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
328 words
A self-contained root canal heated condenser dental instrument, comprising: a handle means, said handle means being hollow, said hollow handle means having an aperture at one end and being open at the opposite end, said handle means having a removable closure means for said open end; a power source means, said power source means being affixed inside said hollow handle means; a dental tool means, said dental tool means being used for filling root canal cavities, said dental tool means having a first end and a second end thereof, said first end being tapered, flexible, and having a memory, said first end being capable of spreading and condensing root canal filling material, said dental tool means being capable of being heated in order to heat said root canal filling material to cause it to be workable, said dental tool means being heated by a heating element means, said heating element means being folded upon itself to form a return loop configuration of two legs, said heating element means at the apex of said return loop being further configured into said taper; an insulating means, said insulating means being located and placed within said dental tool means and between said two legs of said return loop, said insulating means insulating each said leg electrically from the other leg; a coating material, said coating material being applied on said tapered portion of said heating element, said coating material preventing said root canal filling material from adhering thereto; a heat transmission means, said heat transmission means being affixed inside said hollow handle means adjacent to said aperture therein, said heat transmission means being electrically connected to said power source means, said dental tool means having said second end thereof inserted through said aperture in said handle means and into said heat transmission means, said heat transmission means drawing power from said power source means and in turn heating said first end of said dental tool means through said heating element means.
Claim 2
Dependent Claim
328 words
A self-contained root canal heated condenser dental instrument, comprising: a handle means, said handle means being hollow, said hollow handle means having an aperture at one end and being open at the opposite end, said handle means having a removable closure means for said open end; a power source means, said power source means being affixed inside said hollow handle means; a dental tool means, said dental tool means being used for filling root canal cavities, said dental tool means having a first end and a second end thereof, said first end being tapered, flexible, and having a memory, said first end being capable of spreading and condensing root canal filling material, said dental tool means being capable of being heated in order to heat said root canal filling material to cause it to be workable, said dental tool means being heated by a heating element means, said heating element means being folded upon itself to form a return loop configuration of two legs, said heating element means at the apex of said return loop being further configured into said taper; an insulating means, said insulating means being located and placed within said dental tool means and between said two legs of said return loop, said insulating means insulating each said leg electrically from the other leg; a coating material, said coating material being applied on said tapered portion of said heating element, said coating material preventing said root canal filling material from adhering thereto; a heat transmission means, said heat transmission means being affixed inside said hollow handle means adjacent to said aperture therein, said heat transmission means being electrically connected to said power source means, said dental tool means having said second end thereof inserted through said aperture in said handle means and into said heat transmission means, said heat transmission means drawing power from said power source means and in turn heating said first end of said dental tool means through said heating element means.
Claim 3
Dependent Claim
33 words
A self-contained root canal heated condenser dental instrument as recited in claim 1, wherein said hollow handle means is used for holding said dental instrument manually and manipulating it for root canal filling.
Claim 4
Dependent Claim
57 words
A self-contained root canal heated condenser dental instrument as recited in claim 1, and additionally, a chuck means, said chuck means being affixed to said handle means on the outside thereof and centered over said aperture therein, said chuck means being used to hold said dental tool means in position when inserted into said heat transmission means.
Claim 5
Dependent Claim
82 words
A self-contained root canal heated condenser dental instrument as recited in claim 1, and additionally, a switch means, said switch means being located and affixed on the outside of said handle means, said switch means being operable by depressing with one finger, said switch means being used in an electrical circuit through which said heat transmission means draws said power from said power source means, said switch means maintaining an off position in said electrical circuit until said switch means is depressed.
Claim 6
Dependent Claim
22 words
A self-contained root canal heated condenser dental instrument as recited in claim 1, wherein said power source means is a battery means.
Claim 7
Dependent Claim
22 words
A self-contained root canal heated condenser dental instrument as recited in claim 1, wherein said power source is a commercial electrial service.
Claim 8
Dependent Claim
30 words
A self-contained root canal heated condenser dental instrument as recited in claim 6, and additionally a regulator control means to maintain power from said power source within a specific range.
Claim 9
Dependent Claim
31 words
A self-contained root canal heated condenser dental instrument as recited in claim 1, wherein said dental tool means inserted into said heat transmission means is held therein by a snap fit.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |