Patent US3686757A successfully refreshed from Google Patents.
US3686757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant tension orthodontic appliance
Assignee: Individual
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Filing: 1970-12-09
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Granted: 1972-08-29
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Expires: 1990-12-09
Abstract
Abstract Apparatus to aid in the orthodontic or orthopedic correction of dental-facial malformations. The apparatus includes a harness connected to an orthodontic or orthopedic appliance and applies a predetermined constant force in a prescribed direction. The force applied to the appliance is substantially constant regardless of the vertical and lateral movement of the head of the wearer relative to the harness or as the desired displacement of the dental-facial structures occur.
Inventors
- 👤 Jack C Mcvickers
- 👤 Eugene A Leatherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:12
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
In an orthodontic appliance having a harness for mounting on the head of a patient and a corrective tractive apparatus applied to a selected portion of the dental-facial frame of the patient, the improvement comprising a constant-force negator extension member located on each side of the patient''s head, each of said members including a coil having an outer end, said coil having properties which permit it to exert a constant force when in use, means for supporting said coil, means connecting said outer end to one of said harness and apparatus, and means connecting said coil supporting means to the other of said harness and apparatus.
Claim 2
Dependent Claim
106 words
In an orthodontic appliance having a harness for mounting on the head of a patient and a corrective tractive apparatus applied to a selected portion of the dental-facial frame of the patient, the improvement comprising a constant-force negator extension member located on each side of the patient''s head, each of said members including a coil having an outer end, said coil having properties which permit it to exert a constant force when in use, means for supporting said coil, means connecting said outer end to one of said harness and apparatus, and means connecting said coil supporting means to the other of said harness and apparatus.
Claim 3
Dependent Claim
23 words
The structure of claim 1 in which said means for supporting said coil includes a housing, said coil being mounted within said housing.
Claim 4
Dependent Claim
57 words
The structure of claim 2 including a slide member slidably mounted within said housing, said slide member having a cavity for receiving said coil, said means connecting said outer end of said coil to one of said harness and apparatus including an operating rod means, and means for connecting said operating rod means to said slide member.
Claim 5
Dependent Claim
21 words
The structure of claim 2 including a drum rotatably mounted within said housing, and said coil being mounted on said drum.
Claim 6
Dependent Claim
21 words
The structure of claim 2 in which said means for supporting said coil includes reel means freely carried within said housing.
Claim 7
Dependent Claim
146 words
An orthodontic appliance for applying a predetermined constant tension to a selected portion of a dental-facial frame of a patient comprising a harness for mounting on the upper portion of the patient, a corrective tractive apparatus selectively applied to the dental-facial frame of the patient, constant-force means connected to said harness at each side of the patient''s head, said constant-force means including a housing, a negator extension member mounted within said housing, said negator extension member including a coil formed to a predetermined radius of curvature and having properties which permit it to exert a constant force at all times, operating rod means connected to said corrective tractive apparatus and extending into said housing, and means connecting one end of said operating rod means to said negator extension member for extending and retracting said coil in response to relative movement between said harness and said apparatus.
Claim 8
Dependent Claim
146 words
An orthodontic appliance for applying a predetermined constant tension to a selected portion of a dental-facial frame of a patient comprising a harness for mounting on the upper portion of the patient, a corrective tractive apparatus selectively applied to the dental-facial frame of the patient, constant-force means connected to said harness at each side of the patient''s head, said constant-force means including a housing, a negator extension member mounted within said housing, said negator extension member including a coil formed to a predetermined radius of curvature and having properties which permit it to exert a constant force at all times, operating rod means connected to said corrective tractive apparatus and extending into said housing, and means connecting one end of said operating rod means to said negator extension member for extending and retracting said coil in response to relative movement between said harness and said apparatus.
Claim 9
Dependent Claim
17 words
The structure of claim 6 in which said constant force means is adjustably connected to said harness.
References Cited (Backward Citations)
US1329051A
Cited
US3526035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |