US4457709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holding device for a dental dowel pin
Assignee: Individual
•
Filing: 1983-03-09
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Granted: 1984-07-03
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Expires: 2003-03-09
Abstract
Abstract The holding device of the present invention comprises an elongated wire rod of unitary construction having a lower straight section with a pointed end adapted for insertion into an impression material of a dental mold, an intermediate section having a wire coil adapted to grip a dowel pin and an upper section extending from the intermediate section and being angularly displaced therefrom such that upon compressing and releasing the upper section relative to the intermediate section the turns of the wire coil are spread open for inserting and releasably locking a dowel pin therein with the dowel pin being automatically aligned relative to said lower section.
Inventors
- 👤 Charles E. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:29
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44778; Y10T24/44803; Y10T24/44812; Y10T24/44949; Y10T24/44957
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
A dental holding device for holding an elongated tapered dowel pin of conical geometry in a secured position suspended above a cavity of a dental impression when making a positive replica of a tooth from such cavity comprising: an elongated wire rod of unitary construction having a lower straight section with a pointed end which is adapted to be inserted into the impression material adjacent the cavity, an intermediate section including a straight portion and a wire coil, with said wire coil having at least two turns for engaging the tapered body of the dowel pin with the central axis of the wire coil substantially aligned in parallel with said lower straight section and an upper section extending from said wire coil in a direction substantially transverse to said lower straight section and being angularly displaced from said straight portion of said intermediate section to form an included angle therewith of from about 50 to about 85 degrees such that by squeezing and releasing the upper section relative to said straight portion the dowel pin may be inserted and releasably locked in position within said wire coil.
Claim 2
Dependent Claim
187 words
A dental holding device for holding an elongated tapered dowel pin of conical geometry in a secured position suspended above a cavity of a dental impression when making a positive replica of a tooth from such cavity comprising: an elongated wire rod of unitary construction having a lower straight section with a pointed end which is adapted to be inserted into the impression material adjacent the cavity, an intermediate section including a straight portion and a wire coil, with said wire coil having at least two turns for engaging the tapered body of the dowel pin with the central axis of the wire coil substantially aligned in parallel with said lower straight section and an upper section extending from said wire coil in a direction substantially transverse to said lower straight section and being angularly displaced from said straight portion of said intermediate section to form an included angle therewith of from about 50 to about 85 degrees such that by squeezing and releasing the upper section relative to said straight portion the dowel pin may be inserted and releasably locked in position within said wire coil.
Claim 3
Dependent Claim
26 words
A dental holding device as claimed in claim 1 wherein said pointed end of said lower straight section has a flatened surface on one side thereof.
Claim 4
Dependent Claim
37 words
A dental holding device as claimed in claim 2 wherein said upper section has a curled end in the form of a loop which lies in a plane substantially parallel with the plane of the lower section.
Claim 5
Dependent Claim
25 words
A dental holding device as claimed in claims 1 or 3 wherein said elongated wire rod forming said holding device is composed of stainless steel.
Claim 6
Dependent Claim
41 words
A dental holding device as claimed in claim 4 wherein said wire coil has at least three turns and wherein each successive turn from said lower section to said upper section is of slightly reduced diameter relative to the preceding turn.
Claim 7
Dependent Claim
24 words
A dental holding device as claimed in claim 5 wherein said straight portion of said intermediate section lies substantially perpendicular to said lower section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |