US4373913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CFC Expansion arch
Assignee: Individual
•
Filing: 1981-05-15
•
Granted: 1983-02-15
•
Expires: 2001-05-15
Abstract
Abstract A continuous force control arch expander for use in orthodontics is provided comprising a set of anchor bands with expansion wires rigidly and tangentially attached to said anchor bands.
Inventors
- 👤 James R. McAndrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:28
CPC Classifications
A; A61; A61C; A61C7/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A continuous force control arch expander for use in orthodontics comprising: A. A set of anchor bands for fixed attachment to molar teeth on opposite sides of the arch, B. a pair of expansion wires rigidly and tangentially attached one each to said anchor bands having means for placement of a continuous expansion force against the interior surface wall of teeth, and C. a control wire fixedly attached at its opposite ends to said anchor bands in a position to be fitted about the outside of the tooth line.
Claim 2
Dependent Claim
89 words
A continuous force control arch expander for use in orthodontics comprising: A. A set of anchor bands for fixed attachment to molar teeth on opposite sides of the arch, B. a pair of expansion wires rigidly and tangentially attached one each to said anchor bands having means for placement of a continuous expansion force against the interior surface wall of teeth, and C. a control wire fixedly attached at its opposite ends to said anchor bands in a position to be fitted about the outside of the tooth line.
Claim 3
Dependent Claim
142 words
A continuous force control arch expander for use in orthodonics comprising: A. a set of anchor bands for attachment to molar teeth; B. an expansion wire rigidly and tangentially attached at one end to one of said anchor bands and having its opposite end bent in arcuate fashion to mate in a cavity located in one end of an expansion tube, said expansion tube rigedly and tangentially attached at its opposite end to the other anchor band and being bent in arcuate fashion for alignment of its cavity with said expansion wire end; and, C. a coil spring fitting about said expansion wire, said spring having one of its ends abutting against the expansion wire anchor band and having its opposite end abutting against the expansion tube cavity end forcing the wires to push outward against the teeth with a continuous force.
Claim 4
Dependent Claim
142 words
A continuous force control arch expander for use in orthodonics comprising: A. a set of anchor bands for attachment to molar teeth; B. an expansion wire rigidly and tangentially attached at one end to one of said anchor bands and having its opposite end bent in arcuate fashion to mate in a cavity located in one end of an expansion tube, said expansion tube rigedly and tangentially attached at its opposite end to the other anchor band and being bent in arcuate fashion for alignment of its cavity with said expansion wire end; and, C. a coil spring fitting about said expansion wire, said spring having one of its ends abutting against the expansion wire anchor band and having its opposite end abutting against the expansion tube cavity end forcing the wires to push outward against the teeth with a continuous force.
Claim 5
Dependent Claim
38 words
A continuous force control arch expander according to claim 2 wherein a control wire is fixedly attached at its opposite ends to said anchor bands in a position to be fitted about the outside of the tooth line.
References Cited (Backward Citations)
US1504942A
Cited
US1773588A
Cited
US2062395A
Cited
US2262108A
Cited
US3162948A
Cited
US3618214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |