US3670546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid press
Assignee: Individual
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Filing: 1969-12-05
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Granted: 1972-06-20
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Expires: 1989-12-05
Abstract
Abstract The stamping of a sheet material is accomplished by forcing a liquid against it in such manner that it is formed to the shape of a mold or die element. Use of a liquid produces an even distribution of force against the sheet material and thus reduces breakage while overcoming the need for repetitive stamping in order to obtain complex shapes.
Inventors
- 👤 Jose Luis De La Sierra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:46
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/021; B21D26/025; B21D26/031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
271 words
Apparatus for stamping sheet material comprising, a female part having a cavity, first clamping means for holding the sheet material to be stamped over said cavity, said first clamping means comprising a first surface of said female part adjacent to and surrounding said cavity and a clamping member having a first side with a second surface thereon opposed to said first surface, said female part and said clamping member being relaTively movable toward each other whereby said material to be stamped is engaged by and clamped between said surfaces, a cylinder having an open end underlying said female part, a piston slidably received in said cylinder, an elastomeric sheet extending over said open end and sealing said cylinder, said elastomeric sheet underlying said material to be stamped and having straight free edge portions extending radially outwardly from said cylinder and lying parallel to the plane of said open end, a third surface on said clamping member on a second side thereof opposite said first side, said third surface being vertically aligned with said first and second surfaces, said straight free edge portions lying in engagement with said third surface, a second clamping means underlying said free edge portions and said third surface and in vertical alignment therewith, said first and second clamping members being relatively movable toward each other for clamping said elastomeric sheet therebetween, a non-compressible fluid in said cylinder between said piston and said elastomeric sheet, and means for moving said piston toward said cavity forcing said fluid against said elastomeric sheet such that said sheet presses said material to be stamped against the internal surfaces of said cavity.
Claim 2
Dependent Claim
271 words
Apparatus for stamping sheet material comprising, a female part having a cavity, first clamping means for holding the sheet material to be stamped over said cavity, said first clamping means comprising a first surface of said female part adjacent to and surrounding said cavity and a clamping member having a first side with a second surface thereon opposed to said first surface, said female part and said clamping member being relaTively movable toward each other whereby said material to be stamped is engaged by and clamped between said surfaces, a cylinder having an open end underlying said female part, a piston slidably received in said cylinder, an elastomeric sheet extending over said open end and sealing said cylinder, said elastomeric sheet underlying said material to be stamped and having straight free edge portions extending radially outwardly from said cylinder and lying parallel to the plane of said open end, a third surface on said clamping member on a second side thereof opposite said first side, said third surface being vertically aligned with said first and second surfaces, said straight free edge portions lying in engagement with said third surface, a second clamping means underlying said free edge portions and said third surface and in vertical alignment therewith, said first and second clamping members being relatively movable toward each other for clamping said elastomeric sheet therebetween, a non-compressible fluid in said cylinder between said piston and said elastomeric sheet, and means for moving said piston toward said cavity forcing said fluid against said elastomeric sheet such that said sheet presses said material to be stamped against the internal surfaces of said cavity.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |