Patent US3699725A successfully refreshed from Google Patents.
US3699725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of finishing an aperture
Assignee: Individual
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Filing: 1970-09-17
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Granted: 1972-10-24
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Expires: 1990-09-17
Abstract
Abstract A method of finishing a pre-formed aperture in a metal component, for example an extrusion tool opening, to achieve a desired surface finish for the side wall of the aperture, comprises the step of forcing a wax-like abrasive compound through the aperture. Apparatus performing the method comprises a cylinder at one end of which a tool holder can be mounted. A ramoperated piston is reciprocable in the cylinder to force the abrasive compound through the extrusion tool when mounted in the holder.
Inventors
- 👤 Edward George Feldcamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:23
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/10; B24B31/116
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
A method of finishing a pre-formed aperture in a component to achieve a desired surface finish for the side wall of the aperture, comprising the step of forcing through the aperture an abrasive compound comprising abrasive particles distributed in a wax base.
Claim 2
Independent Claim
42 words
A method of finishing a pre-formed aperture in a component to achieve a desired surface finish for the side wall of the aperture, comprising the step of forcing through the aperture an abrasive compound comprising abrasive particles distributed in a wax base.
Claim 3
Dependent Claim
33 words
A method according to claim 1, wherein the compound comprises a suspension of particles of an abrasive such as silicon carbide in a base of wax of a nature similar to dental wax.
Claim 4
Dependent Claim
30 words
A method according to claim 1, wherein said step is one of a plurality of similar steps using different grades of abrasive compound to provide successive coarse and fine finishing.
Claim 5
Dependent Claim
37 words
A method according to claim 1 employed for finishing an extrusion tool and wherein the abrasive compound is forced through the tool opening in the intended extrusion direction and in a manner simulating the normal extrusion process.
Claim 6
Dependent Claim
29 words
A method according to claim 4, wherein the abrasive compound is forced through the tool by a ram capable of exerting a pressure of the order of 50 tons.
Claim 7
Dependent Claim
46 words
A method according to claim 1, wherein the component is mounted in such manner as to provide a free space on the side of the component at which the abrasive compound leaves the opening, in which space the compound leaving the opening is not closely confined.
Claim 8
Independent Claim
57 words
A method of finishing the die opening of an extrusion tool, comprising mounting the tool in a holder and extruding an abrasive compound through the opening under pressure in the intended extrusion direction and in a manner simulating the normal extrusion process, the abrasive compound consisting of abrasive particles distributed in a base of solid wax-like material.
Claim 9
Independent Claim
57 words
A method of finishing the die opening of an extrusion tool, comprising mounting the tool in a holder and extruding an abrasive compound through the opening under pressure in the intended extrusion direction and in a manner simulating the normal extrusion process, the abrasive compound consisting of abrasive particles distributed in a base of solid wax-like 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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |