Patent US3772789A successfully refreshed from Google Patents.
US3772789A
Expired / Lapsed
US
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Orthodontic tensioning assembly
Assignee: Orthoband Co Inc
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Filing: 1971-07-20
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Granted: 1973-11-20
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Expires: 1991-07-20
Abstract
Abstract A tensioning assembly for orthodontic instrumentalities comprising a coil compression spring housed in a tube and a tensioning member, e.g., a hook, adapted to compress the spring to apply traction to the teeth via an orthodontic instrumentality such as a face bow.
Inventors
- 👤 Weoskin I De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:23
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
A tensioning assembly for orthodontic instrumentalities comprising an elongate tube having a first end closure at one end constituting its forward end and a second end closure at its other end constituting its rearward end, said first end closure having a generally central opening therein, an elongate coil compression spring housed in the tube extending lengthwise thereof, said spring having one end constituting its forward end engaging the first end closure and extending back in the tube with its other end constituting its rearward end spaced from the second end closure, a tensioning member extending generally axially through the spring within the tube and extending out of the forward end of the tube through said opening and having a sliding fit in said opening, means on the tensioning member within the tube between the rearward end of the spring and said second end closure having a sliding fit in the tube and engaging the rearward end of the spring, and means at the rearward end of the tube for anchoring it in place for applying traction to the teeth via extension of said tensioning member from the forward end of the tube and resultant compression of the spring by the said means which engages the rearward end of the spring.
Claim 2
Dependent Claim
210 words
A tensioning assembly for orthodontic instrumentalities comprising an elongate tube having a first end closure at one end constituting its forward end and a second end closure at its other end constituting its rearward end, said first end closure having a generally central opening therein, an elongate coil compression spring housed in the tube extending lengthwise thereof, said spring having one end constituting its forward end engaging the first end closure and extending back in the tube with its other end constituting its rearward end spaced from the second end closure, a tensioning member extending generally axially through the spring within the tube and extending out of the forward end of the tube through said opening and having a sliding fit in said opening, means on the tensioning member within the tube between the rearward end of the spring and said second end closure having a sliding fit in the tube and engaging the rearward end of the spring, and means at the rearward end of the tube for anchoring it in place for applying traction to the teeth via extension of said tensioning member from the forward end of the tube and resultant compression of the spring by the said means which engages the rearward end of the spring.
Claim 3
Dependent Claim
38 words
A tensioning assembly as set forth in claim 1 wherein the tube is formed of heat-sealable plastic material and the second end closure is formed by the rearward end of the tube having been pinched flat and heat-sealed.
Claim 4
Dependent Claim
29 words
A tensioning assembly as set forth in claim 2 wherein the pinched-flat end of the tube has an eye and a grommet in the eye constituting said anchoring means.
Claim 5
Dependent Claim
59 words
A tensioning assembly as set forth in claim 3 wherein said tensioning member comprises a hook having a straight shank extending through said opening and said spring, the shank extending rotatably through said spring-engaging means so as to be rotatable on its axis without twisting the spring, and having a head at its rearward end engaging said spring-engaging means.
Claim 6
Dependent Claim
24 words
A tensioning assembly as set forth in claim 4 wherein said spring-engaging means comprises a ball seated in the rearward end of the spring.
References Cited (Backward Citations)
FR915317A
Cited
US3526035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |