US3786665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot extrusion machine
Assignee: Individual
•
Filing: 1972-02-16
•
Granted: 1974-01-22
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Expires: 1992-02-16
Abstract
Abstract A machine for producing metal tubes by hot extrusion of billets. The machine has an annular extrusion gap, a plurality of containers for receiving billets which are uniformly angularly spaced about the extrusion gap and grooves or conduits formed in an annular plate of progressively diminishing cross section towards the annular gap for channeling metal from the billets as associated extrusion pistons exert pressure on the ends of the billets remote from the extrusion gap, the grooves or conduits being delimited by an extrusion needle arranged coaxially of the extrusion gap.
Inventors
- 👤 R Creuzet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:15
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/08; B21C23/085
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A hot extrusion machine for producing metal tubes, comprising an annular extrusion gap, a plurality of containers for receiving billets regularly angularly spaced about the annular gap, and means for channeling the flow of metal from the billets towards the annular gap as an extrusion pressure is exerted on the ends of the billets remote from the annular gap, the channeling means comprising conduits converging towards the extrusion gap, a plurality of such conduits being provided between any one of the container and the annular gap.
Claim 2
Dependent Claim
86 words
A hot extrusion machine for producing metal tubes, comprising an annular extrusion gap, a plurality of containers for receiving billets regularly angularly spaced about the annular gap, and means for channeling the flow of metal from the billets towards the annular gap as an extrusion pressure is exerted on the ends of the billets remote from the annular gap, the channeling means comprising conduits converging towards the extrusion gap, a plurality of such conduits being provided between any one of the container and the annular gap.
Claim 3
Dependent Claim
24 words
A machine according to claim 1, further comprising an extrusion piston associated with each container for exerting the extrusion pressure on its associated billet.
Claim 4
Dependent Claim
12 words
A machine according to claim 2, wherein the pistons move in unison.
Claim 5
Dependent Claim
18 words
A machine according to claim 1, wherein the conduits have progressively diminishing cross sections towards the extrusion gap.
Claim 6
Dependent Claim
16 words
A machine according to claim 1, wherein the conduits are formed in a single annular plate.
Claim 7
Dependent Claim
16 words
A machine according to claim 5, wherein the conduits are delimited by a central extrusion needle.
Claim 8
Dependent Claim
18 words
A machine according to claim 6, wherein the extrusion needle is removably mounted relative to said annular plate.
Claim 9
Independent Claim
141 words
An apparatus for the extrusion of a metal tube, comprising a plurality of cylinders having parallel axes; and angularly equispaced about a central axis; a respective piston received in one end of each of said cylinders for driving a billet of metal within the cylinder and individual thereto in the direction of its other end; a needle disposed along said central axis at said other ends of said cylinders; an annular die surrounding said needle and coaxial therewith to define an annular passage through which metal of said billets is extruded to form the tube; and at least one channel communicating between each cylinder at its other end and said passage and incline to a plane perpendicular to said axis and to the axis of its cylinder toward said passage in the direction of flow of the metal of the billet.
Claim 10
Independent Claim
141 words
An apparatus for the extrusion of a metal tube, comprising a plurality of cylinders having parallel axes; and angularly equispaced about a central axis; a respective piston received in one end of each of said cylinders for driving a billet of metal within the cylinder and individual thereto in the direction of its other end; a needle disposed along said central axis at said other ends of said cylinders; an annular die surrounding said needle and coaxial therewith to define an annular passage through which metal of said billets is extruded to form the tube; and at least one channel communicating between each cylinder at its other end and said passage and incline to a plane perpendicular to said axis and to the axis of its cylinder toward said passage in the direction of flow of the metal of the billet.
Claim 11
Dependent Claim
30 words
The apparatus defined in claim 8 wherein two such channels are provided between each cylinder and said passage, the channels of said cylinders diverging in the direction of said passage.
Claim 12
Dependent Claim
24 words
The apparatus defined in claim 8 wherein said cylinders are formed in a common body and said needle is removably mounted in said Body.
References Cited (Backward Citations)
US89326A
Cited
US2221299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |