US4228937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaving apparatus
Assignee: RCA Corp
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Filing: 1979-03-29
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Granted: 1980-10-21
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Expires: 1999-03-29
Abstract
Abstract An apparatus for accurately and precisely cleaving crystalline material comprising a platform having an edge over which a workpiece projects, and a rotatable member having a scribing point and protrusion extending substantially radially therefrom. Upon rotation of the rotatable member, the arcs described by the scribing point and protrusion are substantially parallel to the platform edge, and intersect that portion of the workpiece which projects over the platform edge.
Inventors
- 👤 Anthony J. Tocci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:31
CPC Classifications
B; B26; B26F; B26F3/00; B26F3/002; B28; B28D; B28D5/00; Y; Y10; Y10T; Y10T225/00; Y10T225/10; Y10T225/12; Y10T225/30; Y10T225/307; Y10T225/321; Y10T225/325
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
An apparatus for cleaving crystalline material, comprising: (a) a platform for supporting the crystalline material thereon, having a substantially straight edge over which the crystalline material projects; and (b) a rotatable member having a scribing point and protrusion extending substantially radially therefrom and located on a plane which is perpendicular to the axis of rotation of the rotatable member, such that upon axial rotation of the rotatable member, the arcs described by the scribing point and protrusion are substantially parallel to the platform edge, and intersect the crystalline material which projects over the edge such that a bending moment is created in that portion of the crystalline material which projects over the platform edge.
Claim 2
Independent Claim
114 words
An apparatus for cleaving crystalline material, comprising: (a) a platform for supporting the crystalline material thereon, having a substantially straight edge over which the crystalline material projects; and (b) a rotatable member having a scribing point and protrusion extending substantially radially therefrom and located on a plane which is perpendicular to the axis of rotation of the rotatable member, such that upon axial rotation of the rotatable member, the arcs described by the scribing point and protrusion are substantially parallel to the platform edge, and intersect the crystalline material which projects over the edge such that a bending moment is created in that portion of the crystalline material which projects over the platform edge.
Claim 3
Dependent Claim
16 words
An apparatus of claim 1, further comprising: means for attaching the crystalline material to the platform.
Claim 4
Dependent Claim
12 words
An apparatus of claim 1, wherein: the rotatable member is a disc.
Claim 5
Dependent Claim
23 words
An apparatus of claim 1, wherein: the protrusion is canted such that its radius increases as its distance from the platform edge increases.
Claim 6
Dependent Claim
32 words
An apparatus of claim 1, wherein: the scribing point is spring mounted in the rotatable member such that it is urged to return to its original position when it is displaced therefrom.
References Cited (Backward Citations)
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |