US3800420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthodontic dilator
Assignee: Individual
•
Filing: 1972-09-29
•
Granted: 1974-04-02
•
Expires: 1992-09-29
Abstract
Abstract The dilating device consists of an element made of two mobile parts facing each other, each part being adapted to be embedded in a block of resin shaped to the area of the palate; one part includes a driving worm with an actuating head and a threaded element located in a housing provided in the said part; the other mobile part includes a rack received in a suitably shaped cavity in the first mobile part, the cavity communicating with the housing of the driving worm; the threads of the driving worm engage with the teeth of the rack whereby rotation of the worm causes the rack to slide in the cavity and produces relative movement between the two parts either towards or away from each other.
Inventors
- 👤 G Ouaknine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:50
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
An orthodontic dilating device for extending the plate transversely, comprising an element consisting of two mobile parts facing each other, each of said parts being adapted to be embedded in a block of resin shaped to the area of the palate, one of said mobile parts including a driving worm having an actuating head and a threaded element located in a housing in said mobile part and arranged to follow substantially the common axis of said two parts, the threads of said threaded element being located in substantially transverse planes; said other mobile part including a rack, the axis thereof being parallel with that of said driving worm and the transverse teeth thereof matching the teeth of said worm, said rack being received in a suitably shaped cavity in the first mobile part, said cavity communicating with the housing of said driving worm; said threads engaging with the teeth of the rack whereby rotation of said worm causes the rack to slide in said cavity and produces relative movement between said two mobile parts either towards or away from each other.
Claim 2
Dependent Claim
181 words
An orthodontic dilating device for extending the plate transversely, comprising an element consisting of two mobile parts facing each other, each of said parts being adapted to be embedded in a block of resin shaped to the area of the palate, one of said mobile parts including a driving worm having an actuating head and a threaded element located in a housing in said mobile part and arranged to follow substantially the common axis of said two parts, the threads of said threaded element being located in substantially transverse planes; said other mobile part including a rack, the axis thereof being parallel with that of said driving worm and the transverse teeth thereof matching the teeth of said worm, said rack being received in a suitably shaped cavity in the first mobile part, said cavity communicating with the housing of said driving worm; said threads engaging with the teeth of the rack whereby rotation of said worm causes the rack to slide in said cavity and produces relative movement between said two mobile parts either towards or away from each other.
Claim 3
Dependent Claim
30 words
A dilating device according to claim 1, wherein the rack consists of a strip of material having teeth in the form of a series of parallel slots longitudinally disposed there-on.
Claim 4
Dependent Claim
19 words
A dilating device according to claim 1, wherein the head of the driving worm carries a detachable protective cap.
Claim 5
Dependent Claim
28 words
A dilating device according to claim 1, wherein the pitch of the driving worm and of the teeth in the rack is substantially between one and two millimetres.
Claim 6
Dependent Claim
32 words
A dilating device according to claim 1, wherein the portion of each mobile part facing the other part is trapezoidal in shape, widening out towards the side remote from the other part.
Claim 7
Dependent Claim
39 words
A dilating device according to cliam 1, wherein the mobile parts have, at their peripheries, perforations making it possible to fit wires for the purpose of reinforcing the blocks of resin in which said parts are to be embedded.
Claim 8
Dependent Claim
39 words
A dilating device according to cliam 1, wherein the mobile parts have, at their peripheries, perforations making it possible to fit wires for the purpose of reinforcing the blocks of resin in which said parts are to be embedded.
Claim 9
Dependent Claim
58 words
A dilating device according to claim 1, further comprising, between the two mobile parts, a cutting wire projecting laterally from the two sides of said parts, said wire being of a specific length and allowing said resin to be cut after being moulded, to produce two separate blocks, in each of which one of said parts is embedded.
Claim 10
Dependent Claim
55 words
A dilating device according to claim 1, further comprising at least one threaded rod attached to a ring surrounding an isolated tooth; at least one of said mobile parts being provided, on the edge thereof remote from the other mobile part, with at least one tapped hole into which said threaded rod may be screwed.
References Cited (Backward Citations)
US2927578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |