US3677050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of postive fluid flow extrusion and optimum fluid control element therefor
Assignee: AT&T Inc
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Filing: 1969-10-01
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Granted: 1972-07-18
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Expires: 1989-10-01
Abstract
Abstract The design and use of an optimum fluid control element for any positive fluid flow extrusion are set forth. The flow control surface of the fluid control element is sigmoidal with a critical clearance between the billet and the flow control surface occupied by pressurized fluid which exerts deformation pressures against the billet and accomplishes a portion of the work of deformation. The fluid occupies between about 3 and 10 percent of the cross-sectional area of the passage defined by the flow control surface through the fluid control element. Use of the fluid control element increases overall extrusion efficiency and homogeneous deformation is approached.
Inventors
- 👤 Nazeer Ahmed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:23
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/007; B21C25/00; B21C25/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
250 words
A method of hydrostatically deforming elongated material, said method comprising: a. passing said elongated material through a zone of deformation defined by an extrusion die having an inlet end adapted to receive said elongated material and an outlet end adapted to discharge deformed product, b. passing a flow of first pressurized fluid into said zone of deformation from the inlet end of said extrusion die between said material and said extrusion die, c. introducing a flow of second pressurized fluid into the zone of deformation at a point intermediate the inlet end and the outlet end of said extrusion die, d. combining said flows of first and second pressurized fluids in said zone of deformation, e. the pressure of said combined flows of first and second pressurized fluids being a maximum at the said point within said zone of deformation at which the second pressurized fluid is introduced, f. deforming said material in said zone of deformation by the exertion of pressure thereon by at least said flow of first pressurized fluid, said flow being controlled by said zone of deformation to deform said material without any abrupt change of flow direction of said material, and g. removing a portion of said combined flows of first and second pressurized fluids from said zone of deformation between the point at which said flow of second pressurized fluid is introduced into said zone of deformation and the outlet end of said extrusion die prior to the completion of deformation of said material.
Claim 2
Independent Claim
250 words
A method of hydrostatically deforming elongated material, said method comprising: a. passing said elongated material through a zone of deformation defined by an extrusion die having an inlet end adapted to receive said elongated material and an outlet end adapted to discharge deformed product, b. passing a flow of first pressurized fluid into said zone of deformation from the inlet end of said extrusion die between said material and said extrusion die, c. introducing a flow of second pressurized fluid into the zone of deformation at a point intermediate the inlet end and the outlet end of said extrusion die, d. combining said flows of first and second pressurized fluids in said zone of deformation, e. the pressure of said combined flows of first and second pressurized fluids being a maximum at the said point within said zone of deformation at which the second pressurized fluid is introduced, f. deforming said material in said zone of deformation by the exertion of pressure thereon by at least said flow of first pressurized fluid, said flow being controlled by said zone of deformation to deform said material without any abrupt change of flow direction of said material, and g. removing a portion of said combined flows of first and second pressurized fluids from said zone of deformation between the point at which said flow of second pressurized fluid is introduced into said zone of deformation and the outlet end of said extrusion die prior to the completion of deformation of said material.
Claim 3
Dependent Claim
485 words
Extrusion apparatus for hydrostatically deforming elongated material having a head end, said apparatus comprising: a. a chamber having an open end, said chamber being adapted to receive first pressurized fluid, said chamber being further adapted to receive said elongated material with the head end thereof facing said open end of said chamber; b. an extrusion die associated with said chamber, said extrusion die having an inlet end facing and adapted to receive the head end of said elongated material and an outlet end adapted to discharge extruded material, said die providing a zone of deformation between said inlet end and said outlet end about said elongAted material, the surface of the zone of deformation between said inlet end and said outlet end being formed with a sigmoidal profile; c. means adapted to produce a flow of first pressurized fluid into said zone of deformation from the inlet end of said extrusion die; d. a first plurality of radially disposed openings provided in said extrusion die at a point intermediate the inlet end and outlet end of said extrusion die, said first plurality of radially disposed openings communicating with the zone of deformation; e. said first plurality of radially disposed openings being adapted to introduce a flow of second pressurized fluid into the zone of deformation at a point intermediate the inlet end and the outlet end of said extrusion die, said flow of first pressurized fluid and said flow of second pressurized fluid combining in said zone of deformation; f. the pressure of said combined flows of first and second pressurized fluids being at a maximum at said point within said zone of deformation at which the second pressurized fluid is introduced; g. said material being deformed at least in part in said zone of deformation by the exertion of pressure thereon by said flow of first pressurized fluid, and said material being deformed at least in part in said zone of deformation by the pressure of said combined flows of first and second pressurized fluid, said flow of first pressurized fluid and said combined flows of first and second pressurized fluids being controlled by said zone of deformation to deform said material without any abrupt change of flow direction of said material; h. a second plurality of radially disposed openings provided in said extrusion die between the point at which said first plurality of openings are formed and the outlet end of said extrusion die, said second plurality of radially disposed openings communicating with the zone of deformation; and i. said second plurality of radially disposed openings being adapted to remove a portion of said combined flows of first and second pressurized fluids from said zone of deformation between the point at which said flow of second pressurized fluid is introduced into said zone of deformation and the outlet end of said extrusion die prior to the completion of deformation of said elongated material.
Claim 4
Dependent Claim
485 words
Extrusion apparatus for hydrostatically deforming elongated material having a head end, said apparatus comprising: a. a chamber having an open end, said chamber being adapted to receive first pressurized fluid, said chamber being further adapted to receive said elongated material with the head end thereof facing said open end of said chamber; b. an extrusion die associated with said chamber, said extrusion die having an inlet end facing and adapted to receive the head end of said elongated material and an outlet end adapted to discharge extruded material, said die providing a zone of deformation between said inlet end and said outlet end about said elongAted material, the surface of the zone of deformation between said inlet end and said outlet end being formed with a sigmoidal profile; c. means adapted to produce a flow of first pressurized fluid into said zone of deformation from the inlet end of said extrusion die; d. a first plurality of radially disposed openings provided in said extrusion die at a point intermediate the inlet end and outlet end of said extrusion die, said first plurality of radially disposed openings communicating with the zone of deformation; e. said first plurality of radially disposed openings being adapted to introduce a flow of second pressurized fluid into the zone of deformation at a point intermediate the inlet end and the outlet end of said extrusion die, said flow of first pressurized fluid and said flow of second pressurized fluid combining in said zone of deformation; f. the pressure of said combined flows of first and second pressurized fluids being at a maximum at said point within said zone of deformation at which the second pressurized fluid is introduced; g. said material being deformed at least in part in said zone of deformation by the exertion of pressure thereon by said flow of first pressurized fluid, and said material being deformed at least in part in said zone of deformation by the pressure of said combined flows of first and second pressurized fluid, said flow of first pressurized fluid and said combined flows of first and second pressurized fluids being controlled by said zone of deformation to deform said material without any abrupt change of flow direction of said material; h. a second plurality of radially disposed openings provided in said extrusion die between the point at which said first plurality of openings are formed and the outlet end of said extrusion die, said second plurality of radially disposed openings communicating with the zone of deformation; and i. said second plurality of radially disposed openings being adapted to remove a portion of said combined flows of first and second pressurized fluids from said zone of deformation between the point at which said flow of second pressurized fluid is introduced into said zone of deformation and the outlet end of said extrusion die prior to the completion of deformation of said elongated material.
Claim 5
Dependent Claim
255 words
An extrusion die for hydrostatically extruding material, said die comprising: a. an inlet end adapted to receive elongated material and an outlet end adapted to discharge extruded product, b. said die providing a zone of deformation between said inlet end and said outlet end, c. said die being adapted to encircle a portion of the length of said elongated material, d. the surface of the zone of deformation of said die between said inlet end and said outlet end being formed with a sigmoidal profile, e. a first plurality of radially disposed openings provided in said extrusion die at a point intermediate the inlet end and outlet end of said extrusion die, said first plurality of radially disposed openings communicating with the zone of deformation, f. a second plurality of radially disposed openings provided in said extrusion die at a point between said first plurality of radially disposed openings and the outlet end of said die, said second plurality of radially disposed openings communicating with the zone of deformation, g. said extrusion die being adapted to surround a flow of first pressurized extrusion fluid passing into the zone of deformation around the elongated material from the inlet end of said die, h. said extrusion die being further adapted to surround a flow of second pressurized extrusion fluid passing into the zone of deformation around the elongated material from said first plurality of radially disposed openings, and i. said second plurality of radially disposed openings being adapted to remove extrusion fluid from the zone of deformation.
Claim 6
Dependent Claim
255 words
An extrusion die for hydrostatically extruding material, said die comprising: a. an inlet end adapted to receive elongated material and an outlet end adapted to discharge extruded product, b. said die providing a zone of deformation between said inlet end and said outlet end, c. said die being adapted to encircle a portion of the length of said elongated material, d. the surface of the zone of deformation of said die between said inlet end and said outlet end being formed with a sigmoidal profile, e. a first plurality of radially disposed openings provided in said extrusion die at a point intermediate the inlet end and outlet end of said extrusion die, said first plurality of radially disposed openings communicating with the zone of deformation, f. a second plurality of radially disposed openings provided in said extrusion die at a point between said first plurality of radially disposed openings and the outlet end of said die, said second plurality of radially disposed openings communicating with the zone of deformation, g. said extrusion die being adapted to surround a flow of first pressurized extrusion fluid passing into the zone of deformation around the elongated material from the inlet end of said die, h. said extrusion die being further adapted to surround a flow of second pressurized extrusion fluid passing into the zone of deformation around the elongated material from said first plurality of radially disposed openings, and i. said second plurality of radially disposed openings being adapted to remove extrusion fluid from the zone of deformation.
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |