US3959880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-stressed orthodontic bracket
Assignee: Individual
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Filing: 1974-08-14
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Granted: 1976-06-01
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Expires: 1994-08-14
Abstract
Abstract A spring-stressed orthodontic bracket in which the bracket consists of two complementary jaw members which define an archwire groove when brought together in slidable relationship on a base member. A spring-biasing wire extends around or through the periphery forcing them together. Suitable limit pins are utilized in conjunction with a base member for limiting the movement of each of the complementary jaw members. The spring wire can also supply a rotational force against an archwire when installed.
Inventors
- 👤 Lawrence F. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:15
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12; A61C7/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A spring-stressed orthodontic bracket comprising: first and second jaw members; a base member, said first and second jaw members being coupled to and carried by said base member, at least one of said first and second jaw members being in slidable relationship with the other of said first and second jaw members; biasing means coupled to at least one of said first and second jaw members and operable for biasing said first and second jaw members toward each other for defining at least one arch wire groove; at least one limit pin extending outwardly from said base member; and at least one elongated groove in said at least one of said first and second jaw members geometrically disposed for receiving said at least one pin base member for limiting relative movement thereof.
Claim 2
Dependent Claim
132 words
A spring-stressed orthodontic bracket comprising: first and second jaw members; a base member, said first and second jaw members being coupled to and carried by said base member, at least one of said first and second jaw members being in slidable relationship with the other of said first and second jaw members; biasing means coupled to at least one of said first and second jaw members and operable for biasing said first and second jaw members toward each other for defining at least one arch wire groove; at least one limit pin extending outwardly from said base member; and at least one elongated groove in said at least one of said first and second jaw members geometrically disposed for receiving said at least one pin base member for limiting relative movement thereof.
Claim 3
Dependent Claim
23 words
The spring-stressed orthodontic bracket of claim 1 wherein said biasing means comprises: a tension spring coupled to said first and second jaw members.
Claim 4
Dependent Claim
38 words
The spring-stressed orthodontic bracket of claim 2 wherein: said tension spring has at least one segment dimensioned for contact with an installed arch wire and operable for exerting a rotational force on said first and second jaw members.
Claim 5
Dependent Claim
121 words
A spring-stressed orthodontic bracket comprising: first and second jaw members; a base member, said first and second jaw members being coupled to and carried by said base member, said first and second jaw members each being in slidable relationship with the other; biasing means coupled to said first and second jaw members and operable for biasing said first and second jaw members toward each other for defining an arch wire groove; first and second limit pins extending outwardly from said base member; and first and second elongated grooves in said first and second jaw members, respectively, said first and second elongated grooves geometrically disposed for receiving said first and second limit pins, respectively, in said base member for limiting movement thereof.
Claim 6
Dependent Claim
121 words
A spring-stressed orthodontic bracket comprising: first and second jaw members; a base member, said first and second jaw members being coupled to and carried by said base member, said first and second jaw members each being in slidable relationship with the other; biasing means coupled to said first and second jaw members and operable for biasing said first and second jaw members toward each other for defining an arch wire groove; first and second limit pins extending outwardly from said base member; and first and second elongated grooves in said first and second jaw members, respectively, said first and second elongated grooves geometrically disposed for receiving said first and second limit pins, respectively, in said base member for limiting movement thereof.
Claim 7
Dependent Claim
28 words
The spring-stressed orthodontic bracket of claim 4 wherein said biasing means comprises: a tension spring in contact with the outer edges of said first and second jaw members.
Claim 8
Dependent Claim
38 words
The spring-stressed orthodontic bracket of claim 5 wherein: said tension spring has at least one segment dimensioned for contact with an installed arch wire and operable for exerting a rotational force on said first and second jaw members.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |