Patent US3579835A successfully refreshed from Google Patents.
US3579835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental paste dispensing tool
Assignee: Individual
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Filing: 1969-01-06
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Granted: 1971-05-25
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Expires: 1989-01-06
Abstract
Abstract A rotary dental tool is provided with self-contained means for automatically feeding a dentifrice to an applicator. The dentifrice is contained in an elongated tubular element that serves as a flexible coupling extending between a rotary drive and the tool head. During operation, the drive causes twisting of the tubular element, thereby urging the dentifrice toward the applicator.
Inventors
- 👤 Myron F Levenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:53
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/00583; A; A61; A61C; A61C17/00; A61C17/005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
154 words
In a dental tool with self-contained means for storing a dentifrice and feeding it to the tool head, a handpiece taking the form of a casing of the contra-angle type; a disposable insert in the casing taking the form of an elongated rotatable element of generally tubular construction that is capable of flexing to conform to the shape of the handpiece; means in the tubular portion of the insert forming a dentifrice reservoir that is closed at the trailing end and in open communication with the tool head at the leading end of the insert; a dentifrice applicator at the leading end of the insert; and means at the trailing end of the insert for coupling it to a rotary drive system whereby, when torsional forces are exerted on the trailing end of the insert, the dentifrice in said reservoir is urged toward the tool head and out of the casing through said applicator.
Claim 2
Dependent Claim
154 words
In a dental tool with self-contained means for storing a dentifrice and feeding it to the tool head, a handpiece taking the form of a casing of the contra-angle type; a disposable insert in the casing taking the form of an elongated rotatable element of generally tubular construction that is capable of flexing to conform to the shape of the handpiece; means in the tubular portion of the insert forming a dentifrice reservoir that is closed at the trailing end and in open communication with the tool head at the leading end of the insert; a dentifrice applicator at the leading end of the insert; and means at the trailing end of the insert for coupling it to a rotary drive system whereby, when torsional forces are exerted on the trailing end of the insert, the dentifrice in said reservoir is urged toward the tool head and out of the casing through said applicator.
Claim 3
Dependent Claim
32 words
Apparatus as defined in claim 1 wherein said casing is formed of two symmetrical halves connected by a hinge to permit opening of said casing for removal and replacement of the insert.
Claim 4
Dependent Claim
53 words
Apparatus as defined in claim 1 wherein said casing has a slot formed in the sidewall thereof and extending therethrough and a pushbutton in said slot extending outwardly from said casing and means operatively connected to said pushbutton within said casing for pressing against the insert to express dental paste from said reservoir.
Claim 5
Dependent Claim
42 words
Apparatus as defined in claim 3 wherein said means connected to said pushbutton is a lever arm integral with said casing and resiliently connected to said casing at one end at an end of said slot for pivotal movement in said slot.
Claim 6
Dependent Claim
27 words
Apparatus as defined in claim 3 wherein said means connected to said pushbutton is a pressure shoe adapted to bear against said coupling element adjacent said reservoir.
Claim 7
Dependent Claim
113 words
A disposable insert for use in a hollow dental handpiece of the contra-angle type wherein said insert takes the form of an elongated flexible element of generally tubular construction that is susceptible of bending to conform to the contra-angle zone of the handpiece and of independent rotation within the handpiece while at the same time serving as a depletable dentifrice reservoir, said tubular element being characterized: a. at its leading end by an applicator through which the dentifrice may be dispensed as needed, b. at its trailing end by an axially projecting mandrel, and c. by means therebetween for rotatably coupling the tubular portion of the insert to the interior of the handpiece.
Claim 8
Dependent Claim
113 words
A disposable insert for use in a hollow dental handpiece of the contra-angle type wherein said insert takes the form of an elongated flexible element of generally tubular construction that is susceptible of bending to conform to the contra-angle zone of the handpiece and of independent rotation within the handpiece while at the same time serving as a depletable dentifrice reservoir, said tubular element being characterized: a. at its leading end by an applicator through which the dentifrice may be dispensed as needed, b. at its trailing end by an axially projecting mandrel, and c. by means therebetween for rotatably coupling the tubular portion of the insert to the interior of the handpiece.
Claim 9
Dependent Claim
27 words
A disposable insert according to claim 6 wherein the tubular portion of the insert is corrugated to enhance its flexiblity within the contra-angle zone of the handpiece.
Claim 10
Dependent Claim
27 words
A disposable insert according to claim 6 wherein the applicator at the leading end of the insert is formed integrally with the tubular portion of the insert.
Claim 11
Dependent Claim
27 words
A disposable insert according to claim 6 wherein the mandrel at the trailing end of the insert is formed integrally with the tubular portion of the insert.
Claim 12
Dependent Claim
24 words
A disposable insert according to claim 9 wherein both the applicator and the mandrel are formed integrally with the tubular portion of the insert.
References Cited (Backward Citations)
US2789352A
Cited
US3472045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |