US4054995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pin with sleeve for making dental prosthesis
Assignee: Individual
•
Filing: 1976-05-03
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Granted: 1977-10-25
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Expires: 1996-05-03
Abstract
Abstract In the making of fixed dental prosthesis, a model is employed, which is an accurate replica of the patient's teeth and gums. For reinforcement, the model is fixed to a base. A model comprises a replica of teeth remaining in the patient's mouth and a replica of teeth to be prepared by restorative dentistry. For preparing the teeth by restorative dental techniques, a die is used. It is desired that the die be removed from and replaced in the model with facility, the die be returned to the model in a precise manner, the die be removable from the base on which the model is secured, and the die be prevented from rotating relative to the pin. Toward this end, the pin of the present invention is formed with a tip that is embedded in the extremity of the die facing the model for fixing the die thereto. The tip has a side elevation contour somewhat similar either to a triangular configuration or a rectangular configuration. Extending from the tip is a shank having one portion extending beyond another portion thereof. The longer portion of the shank is received by a bore formed in a rubber sleeve, which is disposed in the base to which the model is fixed. A wall of the sleeve is planar with the wall of the base removed from the model. The shorter portion of the shank at the extremity thereof abuts against the wall of the rubber sleeve confronting the die.
Inventors
- 👤 Harry Y. Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:13
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
204 words
A dental prosthesis comprising: a. a model; b. a die removably positioned in said model; c. a pin comprising: 1. a stem embedded in said die; and 2. a shank extending from said stem and projecting out of said die, said shank having a longer portion and a shorter portion defining a shoulder and a tip at the lower extremity of said shank; d. a base supporting said model, said base being formed with a first wall confronting said die against which said die is disposed, said base being formed with an opening to receive said longer and shorter portions of said shank of said pin; and e. a sleeve disposed in said base, said sleeve being formed with a bore therethrough aligned with said opening in said base in which to dispose the tip of the longer portion of said shank of said pin to provide a receptacle for the tip of said shank, said sleeve being formed with a first wall confronting said die and surrounding said bore against which said shoulder of said shank of said pin abuts to limit the extent of the insertion of said shank into said base said sleeve extending only along entire length of said tip.
Claim 2
Dependent Claim
204 words
A dental prosthesis comprising: a. a model; b. a die removably positioned in said model; c. a pin comprising: 1. a stem embedded in said die; and 2. a shank extending from said stem and projecting out of said die, said shank having a longer portion and a shorter portion defining a shoulder and a tip at the lower extremity of said shank; d. a base supporting said model, said base being formed with a first wall confronting said die against which said die is disposed, said base being formed with an opening to receive said longer and shorter portions of said shank of said pin; and e. a sleeve disposed in said base, said sleeve being formed with a bore therethrough aligned with said opening in said base in which to dispose the tip of the longer portion of said shank of said pin to provide a receptacle for the tip of said shank, said sleeve being formed with a first wall confronting said die and surrounding said bore against which said shoulder of said shank of said pin abuts to limit the extent of the insertion of said shank into said base said sleeve extending only along entire length of said tip.
Claim 3
Dependent Claim
68 words
The dental prosthesis as claimed in claim 1 wherein said sleeve is made of a softer material than the material from which said base is made to enable an operator to sense the reaching of a controlled distance for the insertion of said shank into said base and to provide a receptacle for the tip of said shank which is less abrasive to the tip of said shank.
Claim 4
Dependent Claim
152 words
The combination of a pin and sleeve for removably positioning a die in a model secured to a base for dental prosthesis comprising: a. said pin comprising: 1. a stem adapted to be embedded in the die, and 2. a shank extending from said stem and adapted for projecting out of said die, said shank having a longer portion and a shorter portion defining a shoulder in a tip at the lower extremity of said shank; and b. a sleeve adapted to be disposed in said base, said sleeve being formed with a bore therethrough in which to dispose the tip of the longer portion of said shank of said pin to provide a receptacle for the tip of said shank, said sleeve being formed with a wall surrounding said bore against which said shoulder of said shank of said pin abuts said sleeve extending only along entire length of said tip.
Claim 5
Dependent Claim
152 words
The combination of a pin and sleeve for removably positioning a die in a model secured to a base for dental prosthesis comprising: a. said pin comprising: 1. a stem adapted to be embedded in the die, and 2. a shank extending from said stem and adapted for projecting out of said die, said shank having a longer portion and a shorter portion defining a shoulder in a tip at the lower extremity of said shank; and b. a sleeve adapted to be disposed in said base, said sleeve being formed with a bore therethrough in which to dispose the tip of the longer portion of said shank of said pin to provide a receptacle for the tip of said shank, said sleeve being formed with a wall surrounding said bore against which said shoulder of said shank of said pin abuts said sleeve extending only along entire length of said tip.
Claim 6
Dependent Claim
16 words
The combination as claimed in claim 3 wherein said sleeve is made of a plastic material.
Claim 7
Dependent Claim
15 words
The combination as claimed in claim 3 wherein said sleeve is made of rubber material.
Claim 8
Dependent Claim
16 words
The combination as claimed in claim 3 wherein said stem is formed with flat side walls.
Claim 9
Dependent Claim
15 words
The combination as claimed in claim 3 wherein said stem has substantially a trianguloid configuration.
Claim 10
Dependent Claim
15 words
The combination as claimed in claim 3 wherein said stem has substantially a rectanguloid configuration.
Claim 11
Dependent Claim
15 words
The combination as claimed in claim 7 wherein said sleeve is made of plastic material.
Claim 12
Dependent Claim
15 words
The combination as claimed in claim 8 wherein said sleeve is made of plastic material.
Claim 13
Dependent Claim
14 words
The combination as claimed in claim 7 wherein said sleeve is made of rubber.
Claim 14
Dependent Claim
14 words
The combination as claimed in claim 8 wherein said sleeve is made of rubber.
Claim 15
Dependent Claim
78 words
The dental prosthesis as claimed in claim 2 wherein said sleeve is formed with a second wall substantially parallel with said first wall of said sleeve, and wherein said base is formed with a second wall substantially parallel with said first wall of said base, said second wall of said sleeve being disposed substantially in planar relation with said second wall of said base to facilitate the removal of foreign matter accumulating in the opening of said base.
Claim 16
Dependent Claim
17 words
the dental prosthesis as claimed in claim 2 wherein said sleeve is made of a plastic material.
Claim 17
Dependent Claim
17 words
A dental prosthesis as claimed in claim 2 wherein said sleeve is made of a rubber material.
Claim 18
Dependent Claim
16 words
A dental prosthesis as claimed in claim 13 wherein said sleeve is made of plastic material.
Claim 19
Dependent Claim
16 words
A dental prosthesis as claimed in claim 13 wherein said sleeve is made of rubber material.
Claim 20
Dependent Claim
17 words
A dental prosthesis as claimed in claim 14 wherein said stem is formed with flat side walls.
Claim 21
Dependent Claim
16 words
A dental prosthesis as claimed in claim 18 wherein said stem has substantially a trianguloid configuration.
Claim 22
Dependent Claim
16 words
A dental prosthesis as claimed in claim 18 wherein said stem has substantially a rectanguloid configuration.
Claim 23
Dependent Claim
17 words
A dental prosthesis as claimed in claim 15 wherein said stem is formed with flat side walls.
Claim 24
Dependent Claim
16 words
A dental prosthesis as claimed in claim 21 wherein said stem has substantially a trianguloid configuration.
Claim 25
Dependent Claim
16 words
A dental prosthesis as claimed in claim 21 wherein said stem has substantially a rectanguloid configuration.
Claim 26
Dependent Claim
17 words
The combination as claimed in claim 3 wherein said sleeve is made of a soft plastic material.
Claim 27
Dependent Claim
17 words
The combination as claimed in claim 3 wherein said sleeve is made of a soft rubber material.
References Cited (Backward Citations)
US3226827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |