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US4242812A
Expired / Lapsed
US
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Typodont having removable teeth
Assignee: Individual
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Filing: 1979-02-26
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Granted: 1981-01-06
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Expires: 1999-02-26
Abstract
Abstract A typodont having one or more removable teeth which may be simultaneously locked in place by a single locking ring. The typodont includes a jaw member having one or more openings for receiving the shanks of the individual removable teeth and a parabolic arch-shaped groove cut in the jaw member which is in communication with each of the openings. The removable teeth each have a notch which is cut in the shank of the tooth with the notch being in alignment with the groove when the tooth is inserted in a jaw member opening. A locking ring having a locking portion which is shaped like the jaw member groove can be placed into the groove so that the locking portion will engage each of the notches in the shanks, thereby locking the removable teeth into place.
Inventors
- 👤 Ivan H. Randoll
- 👤 Robert C. McShirley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:12
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/28; G09B23/283
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
209 words
A typodont comprising: a jaw member including a base and a gum section on said base; said gum section defining a plurality of spaced-apart openings which are arranged in the general shape of an arch, and said jaw member further defining an elongated groove generally extending about said arch, said groove being in communication with each of said openings; a plurality of removable tooth members, each removable tooth member comprising a crown and a shank, and each of said shanks defining a notch which is in substantial alignment with said groove when said removable tooth members are inserted into said openings; a generally U-shaped locking ring which cooperatively engages said groove, with said ring having a locking portion which extends into each of said openings when said locking ring is inserted into said groove; wherein said locking ring has a gripping portion with a generally L-shaped cross-section which extends around the entire outer periphery of said locking ring so that said locking ring may be easily gripped; whereby said removable tooth members may be inserted into said openings and locked therein by placing said locking ring into said groove thereby causing said locking portion of said locking ring to engage said notch in each of said removable tooth members.
Claim 2
Dependent Claim
209 words
A typodont comprising: a jaw member including a base and a gum section on said base; said gum section defining a plurality of spaced-apart openings which are arranged in the general shape of an arch, and said jaw member further defining an elongated groove generally extending about said arch, said groove being in communication with each of said openings; a plurality of removable tooth members, each removable tooth member comprising a crown and a shank, and each of said shanks defining a notch which is in substantial alignment with said groove when said removable tooth members are inserted into said openings; a generally U-shaped locking ring which cooperatively engages said groove, with said ring having a locking portion which extends into each of said openings when said locking ring is inserted into said groove; wherein said locking ring has a gripping portion with a generally L-shaped cross-section which extends around the entire outer periphery of said locking ring so that said locking ring may be easily gripped; whereby said removable tooth members may be inserted into said openings and locked therein by placing said locking ring into said groove thereby causing said locking portion of said locking ring to engage said notch in each of said removable tooth members.
Claim 3
Dependent Claim
42 words
The typodont of claim 1 wherein said jaw member further defines a plurality of apertures having a diameter smaller than that of said openings, said apertures extending from the bottom of said jaw member to the bottom of each of said openings.
Claim 4
Dependent Claim
41 words
The typodont of claim 2 further including an alignment means coupled to said jaw member at each of said openings and coupled to each of said shanks, said alignment means being a means for aligning said removable teeth in said openings.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |