Patent US3738144A successfully refreshed from Google Patents.
US3738144A
Expired / Lapsed
US
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Inverse drawing presses
Assignee: Secim SA
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Filing: 1971-07-12
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Granted: 1973-06-12
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Expires: 1991-07-12
Abstract
Abstract An inverse drawing press has a movable cross-member and a fixed cross-member which carries the die. The movable cross-member carries a bottom for a container moved over the die and receiving the ingot. A punch carried by the bottom for the container separates the end of the bar in the die from the shoe and shear cuts off the shoe. A ram removes any residual metal from the container.
Inventors
- 👤 M Doudet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:30
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/21; B21C23/218; B21C33/00; B21C35/00; B21C35/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
189 words
An inverse drawing press for drawing a bar from an ingot comprising a fixed cross-member, a movable cross-member means for moving said cross-members toward and away from each other, a container having an axial chamber for the ingot open adjacEnt said fixed cross-member and closed when adjacent said movable cross-member, a bottom for said container, a carriage for said bottom on said movable cross-member and displaceab e in a plane perpendicular to the drawing axis, a pocket in said carriage, an extension mounted on said fixed cross-member in the drawing axis, a drawing die on said extension, said pocket being movable into the drawing axis by displacement of said carriage, means for introducing an ingot into said pocket when said bottom of said chamber is located in the drawing axis, means for moving the ingot into said container when said pocket in said carriage is in the drawing axis, a punch mounted for axial movement in said bottom of said container to detach the bar from the shoe, said punch being actuated at the end of the drawing cycle by said means for moving the ingot into said container.
Claim 2
Dependent Claim
189 words
An inverse drawing press for drawing a bar from an ingot comprising a fixed cross-member, a movable cross-member means for moving said cross-members toward and away from each other, a container having an axial chamber for the ingot open adjacEnt said fixed cross-member and closed when adjacent said movable cross-member, a bottom for said container, a carriage for said bottom on said movable cross-member and displaceab e in a plane perpendicular to the drawing axis, a pocket in said carriage, an extension mounted on said fixed cross-member in the drawing axis, a drawing die on said extension, said pocket being movable into the drawing axis by displacement of said carriage, means for introducing an ingot into said pocket when said bottom of said chamber is located in the drawing axis, means for moving the ingot into said container when said pocket in said carriage is in the drawing axis, a punch mounted for axial movement in said bottom of said container to detach the bar from the shoe, said punch being actuated at the end of the drawing cycle by said means for moving the ingot into said container.
Claim 3
Dependent Claim
95 words
A press as described in claim 1, said punch having a diameter of slightly less than that of said die, a piston base for said punch sliding in a chamber in the axis of said bottom of said container, said means for moving said ingot into said container including a shaft for said piston in the drawing axis, said shaft extending opposite said punch and passing through said carriage, said means for moving the ingot into said container engaging the extremity of said shaft and actuating said punch at the end of the drawing cycle.
References Cited (Backward Citations)
US1609988A
Cited
US3530702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |