US3952389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burnishing tool
Assignee: Individual
•
Filing: 1975-02-20
•
Granted: 1976-04-27
•
Expires: 1995-02-20
Abstract
Abstract A hand-held burnishing tool for setting gemstones in a mounting wherein the burnishing surface comprises a rotating wheel having a hardened peripheral surface, the wheel mounted on a bearing and rotatable about the longitudinal axis of the handle. Urging the hardened peripheral surface against a soft metal gemstone mounting while revolving the tool about the perimeter of the mounting, causes the wheel to roll about the mounting and results in turning the edge against the stone avoiding scrape marks and scratches which can occur when a conventional blade burnisher is used. Crimps which may occur during the burnishing process may be easily worked out by repeated passes of the tool. By provision of various surfaces of revolution incorporated in the hardened peripheral surface, the edge of the mounting may be turned in a manner not readily obtainable with a conventional blade burnisher, including cold working a design in the edge while burnishing.
Inventors
- 👤 Carl L. Corder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:50
CPC Classifications
B; B23; B23P; B23P5/00; A; A44; A44C; A44C17/00; A44C17/04; A44C17/043; Y; Y10; Y10T; Y10T29/00; Y10T29/47
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A hand-held burnishing tool for working soft metals comprising: an elongated cylindrical handle means capable of being manually held; a shaft means having one end fixedly retained in said handle means and the other end projecting therefrom, said shaft means having its longitudinal axis generally aligned with the longitudinal axis of said elongated cylindrical handle means; bearing means mounted on the distal end of the projecting end of said shaft means; and a cylindrical shaped burnishing wheel rotatably mounted on said bearing means so its axis of rotation is coaxial with the longitudinal axis of said shaft means, said burnishing wheel having a hardened first peripheral central surface or revolution which is a flat surface of revolution and at least one hardened second peripheral surface of revolution adjacent to one edge thereof which is angularly disposed with reference to said first peripheral surface of revolution whereby a craftsman may employ either of said two surfaces of revolution when utilizing the tool to work soft metal surfaces.
Claim 2
Dependent Claim
166 words
A hand-held burnishing tool for working soft metals comprising: an elongated cylindrical handle means capable of being manually held; a shaft means having one end fixedly retained in said handle means and the other end projecting therefrom, said shaft means having its longitudinal axis generally aligned with the longitudinal axis of said elongated cylindrical handle means; bearing means mounted on the distal end of the projecting end of said shaft means; and a cylindrical shaped burnishing wheel rotatably mounted on said bearing means so its axis of rotation is coaxial with the longitudinal axis of said shaft means, said burnishing wheel having a hardened first peripheral central surface or revolution which is a flat surface of revolution and at least one hardened second peripheral surface of revolution adjacent to one edge thereof which is angularly disposed with reference to said first peripheral surface of revolution whereby a craftsman may employ either of said two surfaces of revolution when utilizing the tool to work soft metal surfaces.
Claim 3
Dependent Claim
27 words
The hand-held burnishing tool defined in claim 1 wherein the hardened first peripheral surface of revolution is substantially larger than said hardened second peripheral surface of revolution.
Claim 4
Dependent Claim
55 words
The hand-held burnishing tool defined in claim 1 wherein the cylindrical shaped burnishing wheel has a hardened third peripheral surface of revolution at the edge of said wheel opposite the edge thereof having the hardened second peripheral surface of revolution whereby three separate working surfaces are provided to the craftsman employing said hand-held burnishing tool.
Claim 5
Dependent Claim
19 words
The hand-held burnishing tool defined in claim 1 wherein the burnishing wheel is detachably mounted on the bearing means.
Claim 6
Dependent Claim
62 words
The tool set forth in claim 1 further comprising retention means for retaining said bearing means and said burnishing means on said shaft means, said retention means comprising: a threaded extension on the projecting end of said shaft means; a nut threadably engaged on said threadable extension; and a washer fitting about said means positioned between said nut and said burnishing means.
Claim 7
Dependent Claim
54 words
The tool set forth in claim 5 wherein the second hardened peripheral surface of revolution of said burnishing wheel is a concave surface of revolution circumferentially oriented around one edge of said burnishing wheel whereby said concave surface of revolution can be urged against a soft metal surface to smoothly burnish an edge thereof.
Claim 8
Dependent Claim
49 words
The tool set forth in claim 6 wherein said second hardened peripheral surface of said burnishing wheel defines a beveled surface circumferentially oriented around one edge of said burnishing wheel whereby said beveled edge can be urged against a soft metal surface to smoothly form a flattened edge thereof.
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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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |