US3750442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressive forming
Assignee: General Electric Co
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Filing: 1962-12-19
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Granted: 1973-08-07
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Expires: 1982-12-19
Abstract
Abstract 1. Apparatus for the compressive forming of an article comprising: A DIE INCLUDING A. A DIE CAVITY, B. A WORKPIECE RECEIVING CHAMBER CONNECTED WITH AND ANGULARLY DISPOSED WITH THE DIE CAVITY AND C. PORT MEANS IN A WALL OF THE DIE CAVITY AND DISTINCT FROM THE WORKPIECE RECEIVING CHAMBER; A SOFT METAL MATRIX CONTAINED WITHIN THE DIE CAVITY; MEANS TO INTRODUCE A WORKPIECE INTO THE DIE CAVITY; FORCE MEANS TO PRESS THE WORKPIECE INTO THE DIE CAVITY; AND CONTROL MEANS TO CONTROL THE RATE OF RELEASE OF MATRIX FROM THE DIE CAVITY THROUGH THE PORT MEANS.
Inventors
- 👤 R Cogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:37
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/28; B21K1/32; B21J; B21J5/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
Apparatus for the compressive forming of an article comprising: a die including a. a die cavity, b. a workpiece receiving chamber connected with and angularly disposed with the die cavity and c. port means in a wall of the die cavity and distinct from the workpiece receiving chamber; a soft metal matrix contained within the die cavity; means to introduce a workpiece into the die cavity; force means to press the workpiece into the die cavity; and control means to control the rate of release of matrix from the die cavity through the port means.
Claim 2
Dependent Claim
95 words
Apparatus for the compressive forming of an article comprising: a die including a. a die cavity, b. a workpiece receiving chamber connected with and angularly disposed with the die cavity and c. port means in a wall of the die cavity and distinct from the workpiece receiving chamber; a soft metal matrix contained within the die cavity; means to introduce a workpiece into the die cavity; force means to press the workpiece into the die cavity; and control means to control the rate of release of matrix from the die cavity through the port means.
Claim 3
Dependent Claim
152 words
Apparatus for use in the compressive forming of an article comprising: a die including a. a plurality of shaped members which together define walls of a die cavity and b. a workpiece receiving chamber connected with and angularly disposed with the die cavity; a soft metal matrix contained within the die cavity; means to introduce a workpiece into the die cavity through the workpiece receiving chamber; a first force means to press the workpiece into the die cavity; second force means to press the plurality of shaped members one toward the other; the first force means being greater than the sum of the second force means and the compressive strength of the workpiece material; whereby the first force means deforms the workpiece into the die cavity while at the same time separating the walls of the plurality of shaped members to allow matrix to flow from the walls of the die cavity.
Claim 4
Dependent Claim
152 words
Apparatus for use in the compressive forming of an article comprising: a die including a. a plurality of shaped members which together define walls of a die cavity and b. a workpiece receiving chamber connected with and angularly disposed with the die cavity; a soft metal matrix contained within the die cavity; means to introduce a workpiece into the die cavity through the workpiece receiving chamber; a first force means to press the workpiece into the die cavity; second force means to press the plurality of shaped members one toward the other; the first force means being greater than the sum of the second force means and the compressive strength of the workpiece material; whereby the first force means deforms the workpiece into the die cavity while at the same time separating the walls of the plurality of shaped members to allow matrix to flow from the walls of the die cavity.
Claim 5
Independent Claim
132 words
A method for compressively forming a workpiece into an article in a die having a cavity shaped as the article to be formed, comprising the steps of: filling the die cavity with a soft metal matrix having a compressive strength less than that of the workpiece and of the die; and then pressing the workpiece into the die cavity and against the matrix with a workpiece deforming force to elongate and form the workpiece into the article in the die cavity, while at the same time, releasing from walls of the cavity the matrix displaced by the forming workpiece, the matrix being released at a controlled rate to control pressure exerted at the interface between the workpiece and the matrix to at least about three-fourths of the compressive strength of the workpiece.
Claim 6
Independent Claim
132 words
A method for compressively forming a workpiece into an article in a die having a cavity shaped as the article to be formed, comprising the steps of: filling the die cavity with a soft metal matrix having a compressive strength less than that of the workpiece and of the die; and then pressing the workpiece into the die cavity and against the matrix with a workpiece deforming force to elongate and form the workpiece into the article in the die cavity, while at the same time, releasing from walls of the cavity the matrix displaced by the forming workpiece, the matrix being released at a controlled rate to control pressure exerted at the interface between the workpiece and the matrix to at least about three-fourths of the compressive strength of the workpiece.
Claim 7
Independent Claim
150 words
A method for compressively forming a workpiece into an article in a die having a workpiece receiving chamber and a die cavity shaped as the article to be formed, comprising the steps of: filling the die cavity with a solid soft metal matrix having a compressive strength less than that of the die and of the workpiece; introducing a workpiece into the workpiece receiving chamber; applying a material deforming force to the workpiece to press the workpiece into the die cavity and against the matrix to elongate and form the workpiece into the article in the die cavity while at the same time, releasing from walls of the die cavity the matrix displaced by the forming workpiece, the matrix being released at a controlled rate to control pressure exerted at the interface between the matrix and the workpiece to at least about three-fourths of the compressive strength of the workpiece.
Claim 8
Independent Claim
150 words
A method for compressively forming a workpiece into an article in a die having a workpiece receiving chamber and a die cavity shaped as the article to be formed, comprising the steps of: filling the die cavity with a solid soft metal matrix having a compressive strength less than that of the die and of the workpiece; introducing a workpiece into the workpiece receiving chamber; applying a material deforming force to the workpiece to press the workpiece into the die cavity and against the matrix to elongate and form the workpiece into the article in the die cavity while at the same time, releasing from walls of the die cavity the matrix displaced by the forming workpiece, the matrix being released at a controlled rate to control pressure exerted at the interface between the matrix and the workpiece to at least about three-fourths of the compressive strength of the workpiece.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |