Patent US3755904A successfully refreshed from Google Patents.
US3755904A
Expired / Lapsed
US
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Marking instrument for dental castings
Assignee: GEN CONTROL CORP
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Filing: 1971-01-29
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Granted: 1973-09-04
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Expires: 1991-01-29
Abstract
Abstract An instrument is provided for applying trimming lines on the surfaces of castings, such as dental castings. The instrument has a calibrated base member defining a circular track for rotatably supporting a collar means. Marker guide means are movably associated with the collar means to allow marker lines to be drawn on the upper surface or outer periphery of the casting in dependence upon the position of the guide means on the collar, or the angular position of the collar relative to the base.
Inventors
- 👤 R Kestler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:53
CPC Classifications
B; B25; B25H; B25H7/00; B25H7/04; A; A61; A61C; A61C9/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
An instrument for applying marking lines to the surfaces of a dental casting and the like, comprising: a circular base member, a circular track means formed on said base member and coaxially aligned therewith, a collar means coaxially and rotatably mounted on said track means, said collar means having a cylindrical wall extending a distance above said base member greater than the height of the dental casting to be marked, graduations on said base, said graduations indicating the angular position of said collar relative to said base, and marker guide means slidably arranged on the edge of said cylindrical wall of said collar means for movement back and forth in a fixed line of travel on both sides of the center line of said track means, said marker guide means having a marker guide at right angles to said fixed line whereby marking lines can be drawn on a casting positioned on said base below said guide means.
Claim 2
Dependent Claim
158 words
An instrument for applying marking lines to the surfaces of a dental casting and the like, comprising: a circular base member, a circular track means formed on said base member and coaxially aligned therewith, a collar means coaxially and rotatably mounted on said track means, said collar means having a cylindrical wall extending a distance above said base member greater than the height of the dental casting to be marked, graduations on said base, said graduations indicating the angular position of said collar relative to said base, and marker guide means slidably arranged on the edge of said cylindrical wall of said collar means for movement back and forth in a fixed line of travel on both sides of the center line of said track means, said marker guide means having a marker guide at right angles to said fixed line whereby marking lines can be drawn on a casting positioned on said base below said guide means.
Claim 3
Dependent Claim
19 words
The instrument of claim 1 and further including a scriber coupled with said guide means to draw said lines.
Claim 4
Dependent Claim
53 words
The instrument of claim 1 wherein said marker guide means defines a longitudinal slot which, in use, accepts a scriber for drawing said lines on said casting dependent upon the position of said guide means on said collar means and upon the angular position of said collar means relative to said base member.
References Cited (Backward Citations)
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Cited
US1296643A
Cited
US1864804A
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US1927992A
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US2621406A
Cited
US3548503A
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |