Patent US7048717B1 successfully refreshed from Google Patents.
US4507084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Palatal expansion device
Assignee: Medical Magnetics Inc
•
Filing: 1983-12-13
•
Granted: 1985-03-26
•
Expires: 2003-12-13
Abstract
Abstract The invention contemplates an orthodontic palatal expansion device wherein separate palate-body halves are attachable to adjacent maxillary teeth and incorporate permanent magnets arranged in a repulsion mode and mounted in such a way as to apply force needed to split the mid-palatal suture. The reacting fields of these magnets also aid in reorganization of the tissues to insure maintenance of the expansion and to accelerate osteogenesis. The device may be constructed for fixation to the patient, as via orthodontic bands, or it may be fashioned with orthodontic wires that permit selective removal and replacement by the patient.
Inventors
- 👤 Abraham Blechman
- 👤 Eugene A. Pescatore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:39
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/006; A61C7/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
132 words
An orthodontic device for rapid palatal expansion of a maxillary arch, comprising two palate body parts constituting right and left longitudinally divided halves of a body, said body parts having adjacent longitudinally extending central confronting edges and having outer edges in general conformance with the lingual contouring of teeth of the respective right and left halves of a maxillary arch, guide means including aligned coacting formations in said adjacent edges of the respective body parts, said guide means establishing a degree of relative lateral displaceability of said body parts with respect to each other, and means including a polarized magnet carried by each of said body parts, said magnets being in like-pole confronting relation, whereby repulsion-force reaction between said magnets is operative to constantly urge outward lateral displacement of said body parts.
Claim 2
Dependent Claim
132 words
An orthodontic device for rapid palatal expansion of a maxillary arch, comprising two palate body parts constituting right and left longitudinally divided halves of a body, said body parts having adjacent longitudinally extending central confronting edges and having outer edges in general conformance with the lingual contouring of teeth of the respective right and left halves of a maxillary arch, guide means including aligned coacting formations in said adjacent edges of the respective body parts, said guide means establishing a degree of relative lateral displaceability of said body parts with respect to each other, and means including a polarized magnet carried by each of said body parts, said magnets being in like-pole confronting relation, whereby repulsion-force reaction between said magnets is operative to constantly urge outward lateral displacement of said body parts.
Claim 3
Dependent Claim
40 words
The orthodontic device of claim 1, in which an orthodontic wire is embedded in each body part and is exposed along at least part of said outer edges for positive anchorage to one or more teeth of the maxillary arch.
Claim 4
Dependent Claim
30 words
The orthodontic device of claim 1, in which said guide means includes aligned transverse bores in said body parts, and a guide wire entered in common to said aligned bores.
Claim 5
Dependent Claim
64 words
The orthodontic device of claim 1, in which said guide means includes aligned transverse bores in said body parts, a first of said magnets being fully received in one of said bores, and the second of said magnets being partly received in said one bore and partly received in the other of said bores and therefore contributing to the retained alignment of said bores.
Claim 6
Dependent Claim
34 words
The orthodontic device of claim 4, in which a compression spring is captive in one of said bores behind one of said magnets and is preloaded to urge the same toward the other magnet.
Claim 7
Dependent Claim
33 words
The orthodontic device of claim 4, in which compression-spring means is captive in each of said bores behind each of the respective magnets and is preloaded to urge the magnets toward each other.
Claim 8
Dependent Claim
82 words
The orthodontic device of claim 1, in which at least one of said body parts has a laterally extending guide bore open at the central edge of said body part, said guide bore being configured for laterally displaceable guidance of the magnet of said one body part, and a compression spring captive in said bore behind the magnet, said spring being preloaded to urge the magnet of said one body part in the direction of the magnet of the other body part.
Claim 9
Dependent Claim
63 words
The orthodontic device of claim 1, in which each body part has a laterally extending guide bore open at the central edge of the body part, said guide bores being configured for laterally displaceable guidance of the associated magnet, and a compression spring captive in each bore behind the associated magnet, said springs being preloaded to urge the respective magnets toward each other.
Claim 10
Dependent Claim
73 words
The orthodontic device of claim 1, in which at least one of said body parts has a laterally extending guide bore open at the central edge of said body part, said guide bore being configured for laterally displaceable guidance of the magnet of said one body part, and orthodontic-clamp means carried by said one body with externally accessible actuating means for clamping a selected lateral position of the magnet in said guide bore.
Claim 11
Dependent Claim
66 words
The orthodontic device of claim 1, in which each body part has a laterally extending guide bore open at the central edge of the body part, said guide bores being configured for laterally displaceable guidance of the associated magnet, and orthodontic-clamp means carried by each body part with externally accessible actuating means for clamping a selected lateral position of the associated magnet in its guide bore.
Claim 12
Dependent Claim
34 words
The orthodontic device of claim 1, in which said magnets constitute the first of a plurality of opposed pairs of magnets in like-pole confronting relation and at longitudinally spaced locations along the central edges.
Claim 13
Dependent Claim
41 words
The orthodontic device of claim 3, in which said aligned transverse bores and associated guide wire constitute one of a plurality of pairs of aligned transverse bores with an associated guide wire entered in common to each pair of aligned bores.
Claim 14
Dependent Claim
24 words
The orthodontic device of claim 1, in which each of said body parts includes means for outer-edge fixed anchorage to molar and/or premolar teeth.
References Cited (Backward Citations)
US3984915A
Cited
US4026023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |