US3931677A
Expired / Lapsed
US
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Die stone casting for dental restoration
Assignee: Individual
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Filing: 1974-02-06
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Granted: 1976-01-13
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Expires: 1994-02-06
Abstract
Abstract An assembly for creating die stone castings for dental restoration (inlays, crowns, and fixed bridges) comprising (a) a die pin setter comprising a flexible plastic tube or rod positionable in substantially super-imposed relation above the curvilinear array of cavities in a dental impression formed of elastic material, (b) a die pin holder comprising a series of bifurcated clips each forced down over the plastic tube in press-fit relation but nonetheless accommodating rotation of each clip in respect to the plastic tube into generally coaxial relation with an adjacent impression cavity, and (c) a dual dowel or die pin unit associated with each clip with at least one upper pin of the unit press-fit in depending relation into a blind bore of the associated clip locating two lower dowel or die pins in the adjacent impression cavity. The depending association between each clip and its dual pin unit allows relative rotation to aid in properly orienting the two lower die pins in the adjacent impression cavity. Also, by using two upper die pins in lieu of one, either may be press-fit into the blind bore of the adjacent clip, again insuring accurate, simple and quick placement of the die pins in the impression cavity.
Inventors
- 👤 Lawrence E. Tinder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
183 words
A die pin holder comprising an elongated clip having a major axis and three ends, the clip comprising: means at one end of the clip along said axis for releasably receiving in depending generally axial relation at least one die pin; a body disposed central of the three ends comprising a bifurcated section defining an inverted Y, the apex region of which defines a downwardly directed opening adapted to be force fit over die pin setter means; a free normally upwardly directed second end along said axis comprising a handle for manually gripping the clip to cause the clip to be placed downwardly in and removed upwardly from said force fit relation with the die pin setter means; said third end projecting at an acute angle in respect to said axis, with said downwardly directed opening at said apex region being sized to initially slightly under match the cross sectional size of the die pin setter means over which the die pin holder is force fit to enlarge the size of said opening equal to the size of the die pin setter means.
Claim 2
Dependent Claim
183 words
A die pin holder comprising an elongated clip having a major axis and three ends, the clip comprising: means at one end of the clip along said axis for releasably receiving in depending generally axial relation at least one die pin; a body disposed central of the three ends comprising a bifurcated section defining an inverted Y, the apex region of which defines a downwardly directed opening adapted to be force fit over die pin setter means; a free normally upwardly directed second end along said axis comprising a handle for manually gripping the clip to cause the clip to be placed downwardly in and removed upwardly from said force fit relation with the die pin setter means; said third end projecting at an acute angle in respect to said axis, with said downwardly directed opening at said apex region being sized to initially slightly under match the cross sectional size of the die pin setter means over which the die pin holder is force fit to enlarge the size of said opening equal to the size of the die pin setter means.
Claim 3
Dependent Claim
46 words
A die pin holder according to claim 1 further comprising a slot at said apex region extending angularly into the central body to accommodate facile spreading of the holder of the bifurcated section during placement downwardly upon and removal upwardly from the die pin setter means.
Claim 4
Dependent Claim
31 words
A die pin holder according to claim 1 wherein said one end means comprises an axial blind bore adapted to receive the at least one die pin in force-fit releasable relation.
Claim 5
Dependent Claim
111 words
A one-piece die pin unit comprising: a central enlarged body; at least one pin integral with and extending essentially perpendicular upwardly away from the body, said at least one pin adapted to be force fit into releasable depending engagement with a receptacle of a die pin holder; at least two pins integral with and extending downwardly in spaced essentially parallel relation essentially perpendicular away from the body in a direction essentially opposed to the at least one upwardly directed pin, said at least two downwarly directed pins adapted to be placed in depending relation within die stone material within a dental impression cavity prior to the initial set of the material.
Claim 6
Dependent Claim
111 words
A one-piece die pin unit comprising: a central enlarged body; at least one pin integral with and extending essentially perpendicular upwardly away from the body, said at least one pin adapted to be force fit into releasable depending engagement with a receptacle of a die pin holder; at least two pins integral with and extending downwardly in spaced essentially parallel relation essentially perpendicular away from the body in a direction essentially opposed to the at least one upwardly directed pin, said at least two downwarly directed pins adapted to be placed in depending relation within die stone material within a dental impression cavity prior to the initial set of the material.
Claim 7
Dependent Claim
138 words
A dental restoration assembly comprising: a one piece elongated flexible plastic tubular die pin setting member disposed in an adjustable curvilinear configuration; at least one die pin holding plastic clip having an upwardly projecting manual handle, a central bifurcated section, from which two downwardly extending fingers depend, the bifurcated section being force fit downwardly over the tubular member allowing manual radial rotation of the clip upon the axis of the tubular member, one of said fingers being longer than the other, the longer finger having a blind bore in the lower end thereof; a dual die pin unit comprising an upwardly extending pin force fit into said blind bore, a central body portion and at least two downwardly extending pins adapted to be placed in die stone material within a dental impression cavity before the material has set.
Claim 8
Dependent Claim
138 words
A dental restoration assembly comprising: a one piece elongated flexible plastic tubular die pin setting member disposed in an adjustable curvilinear configuration; at least one die pin holding plastic clip having an upwardly projecting manual handle, a central bifurcated section, from which two downwardly extending fingers depend, the bifurcated section being force fit downwardly over the tubular member allowing manual radial rotation of the clip upon the axis of the tubular member, one of said fingers being longer than the other, the longer finger having a blind bore in the lower end thereof; a dual die pin unit comprising an upwardly extending pin force fit into said blind bore, a central body portion and at least two downwardly extending pins adapted to be placed in die stone material within a dental impression cavity before the material has set.
Claim 9
Independent Claim
117 words
A method of supporting an array of die pin holders upon a die pin setting member, comprising the steps of: shaping a one piece yieldable plastic tubular die pin setting member into a curvilinear essentially superimposed relation over a dental impression; force fitting one bifurcated die pin holder downwardly over the tubular member above each impression cavity in releasable relatively radially rotatable fashion with a portion of the bifurcated holder projecting downwardly toward the associated cavity; force connecting at least one die pin unit to said downwardly projecting portion of the die pin holder in depending releasable relatively rotatable fashion; and imbedding only a lower part of the die pin in die stone placed within the cavity.
Claim 10
Independent Claim
117 words
A method of supporting an array of die pin holders upon a die pin setting member, comprising the steps of: shaping a one piece yieldable plastic tubular die pin setting member into a curvilinear essentially superimposed relation over a dental impression; force fitting one bifurcated die pin holder downwardly over the tubular member above each impression cavity in releasable relatively radially rotatable fashion with a portion of the bifurcated holder projecting downwardly toward the associated cavity; force connecting at least one die pin unit to said downwardly projecting portion of the die pin holder in depending releasable relatively rotatable fashion; and imbedding only a lower part of the die pin in die stone placed within the cavity.
Claim 11
Dependent Claim
58 words
A method as defined in claim 6 wherein said force connecting step comprises placing one rod portion of the die pin unit in depending force fit relation in a blind bore of the projecting portion of the die pin holder and causing at least two other spacing rod portions to extend downwardly into the die stone receiving cavity.
Claim 12
Dependent Claim
74 words
In a dental restoration and die pin assembly, the improvement comprising die pin setter means comprising a length of small diameter elongated deformable plastic material with memory having two ends and placed in a curvilinear horseshoe configuration, each end of the elongated plastic material being secured to spaced selectively settable jig mount site means, whereby each change in the location of each jig mount site means alters the curve defined by the plastic material.
Claim 13
Dependent Claim
74 words
In a dental restoration and die pin assembly, the improvement comprising die pin setter means comprising a length of small diameter elongated deformable plastic material with memory having two ends and placed in a curvilinear horseshoe configuration, each end of the elongated plastic material being secured to spaced selectively settable jig mount site means, whereby each change in the location of each jig mount site means alters the curve defined by the plastic material.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |