US3820369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic press
Assignee: Individual
•
Filing: 1973-02-26
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Granted: 1974-06-28
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Expires: 1993-02-26
Abstract
Abstract An improved hydraulic press for sequentially forming and perforating a workpiece including means responsive to hydraulic pressure for selectively forming workpiece, means for introducing a hydraulic fluid into the workpiece forming means, means for selectively perforating the workpiece and means for actuating the perforating means for perforating the workpiece after formation thereof. The workpiece forming means and hydraulic fluid introducing means are coupled to permit introduction of the hydraulic fluid into the workpiece forming means. The perforating means is responsive to hydraulic pressure and is coupled with the workpiece forming means for perforating the workpiece.
Inventors
- 👤 H Tominaga
- 👤 K Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:00
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/033; B21D26/049; B21D26/035; B21D28/00; B21D28/24; B21D28/30; B21D37/00; B21D37/08; B21D53/00; B21D53/26; B21D53/261; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49453; Y10T29/4946
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
255 words
An improved hydraulic press for sequentially forming and perforating a workpiece comprising means responsive to hydraulic pressure for selectively forming a workpiece, means for introducing a hydraulic fluid into said workpiece forming means, said means being coupled with said workpiece forming means for introduction of said hydraulic fluid therein, means for selectively perforating said workpiece coupled with said workpiece forming means, said perforating means being responsive to hydraulic pressure for perforating said workpiece, means for actuating said perforating means for perforating said workpiece after formation of said workpiece, said hydraulic pressure responsive workpiece forming means including a hydraulic pressure distributing cylinder having an open end for receiving a hydraulic fluid under pressure and a substantially closed end for providing selective distribution through said hydraulic pressure distributing cylinder of said hydraulic fluid, said hydraulic pressure distributing cylinder being provided with at least one hydraulic fluid exhaust duct for exhausting hydraulic fluid therefrom under pressure for distributing said hydraulic fluid for forming said workpiece, said hydraulic pressure distributing cylinder being provided with at least one hydraulic fluid intake duct for inletting thereto hydraulic fluid under pressure for perforating a formed workpiece, respective outlets and inlets of said at least one hydraulic fluid exhaust and intake ducts being in spaced relation, one to another, in said hydraulic pressure distributing cylinder, said at least one hydraulic fluid exhaust duct being continuously open for continuous exhaust of pressurized hydraulic fluid therethrough, said at least one hydraulic fluid intake duct being normally closed for permitting workpiece forming before perforating said workpiece.
Claim 2
Dependent Claim
255 words
An improved hydraulic press for sequentially forming and perforating a workpiece comprising means responsive to hydraulic pressure for selectively forming a workpiece, means for introducing a hydraulic fluid into said workpiece forming means, said means being coupled with said workpiece forming means for introduction of said hydraulic fluid therein, means for selectively perforating said workpiece coupled with said workpiece forming means, said perforating means being responsive to hydraulic pressure for perforating said workpiece, means for actuating said perforating means for perforating said workpiece after formation of said workpiece, said hydraulic pressure responsive workpiece forming means including a hydraulic pressure distributing cylinder having an open end for receiving a hydraulic fluid under pressure and a substantially closed end for providing selective distribution through said hydraulic pressure distributing cylinder of said hydraulic fluid, said hydraulic pressure distributing cylinder being provided with at least one hydraulic fluid exhaust duct for exhausting hydraulic fluid therefrom under pressure for distributing said hydraulic fluid for forming said workpiece, said hydraulic pressure distributing cylinder being provided with at least one hydraulic fluid intake duct for inletting thereto hydraulic fluid under pressure for perforating a formed workpiece, respective outlets and inlets of said at least one hydraulic fluid exhaust and intake ducts being in spaced relation, one to another, in said hydraulic pressure distributing cylinder, said at least one hydraulic fluid exhaust duct being continuously open for continuous exhaust of pressurized hydraulic fluid therethrough, said at least one hydraulic fluid intake duct being normally closed for permitting workpiece forming before perforating said workpiece.
Claim 3
Dependent Claim
234 words
The improved hydraulic press of claim 1, including a piston slidably mounted on said hydraulic pressure distributing cylinder for slidable movement there along, said piston having interiorly contoured side walls relative to said hydraulic pressure distributing cylinder exterior surface thereby defining therebetween at least one pressure chamber, and means for limiting slidable movement of said piston along said hydraulic pressure distributing cylinder exterior surface between upper and lower set positions, said piston having a contoured bottom surface defining a pressure chamber between said piston and said means for limiting slidable movement thereof along said hydraulic pressure distributing cylinder exterior surface, said at least one hydraulic fluid exhaust duct of said hydraulic pressure distributing cylinder communicating with said pressure chamber, said pressure chamber being substantially continuous with said at least one pressure chamber defined between said hydraulic pressure distributing cylinder exterior surface and said contoured interior piston side wall, said piston in a lower set position maintaining said at least one hydraulic fluid intake duct of said hydraulic pressure distributing cylinder in a normally closed position, said at least one hydraulic fluid intake duct being in open position when said piston is in an upper set position, said piston being accelerated from lower to upper set positions by hydraulic pressure build-up in said pressure chamber through hydraulic fluid exhaust thereto from said at least one hydraulic fluid exhaust duct of said hydraulic pressure distributing cylinder.
Claim 4
Dependent Claim
36 words
The improved hydraulic press of claim 2, including a bottom mold having an interior face contoured to the shape of the bottom of the formed workpiece and providing a punching die surface for perforating said workpiece.
Claim 5
Dependent Claim
131 words
The improved hydraulic press of claim 2 said hydraulic pressure distributing cylinder having at least one chamber communicating with said at least one hydraulic fluid intake duct through which hydraulic fluid inlets into said at least one chamber in an upper set position of said piston, at least one piston housed in said at least one chamber of said hydraulic pressure distributing cylinder, and at least one punch member for perforating said workpiece, said at least one punch member being mounted on said at least one piston and being actuated thereby perforating said workpiece, said at least one piston being actuated by hydraulic pressure build-up in said at least one chamber through hydraulic fluid inlet therein from said at least one hydraulic fluid intake duct of said hydraulic pressure distributing cylinder.
Claim 6
Dependent Claim
34 words
The improved hydraulic press of claim 2 including means for ejecting areas of said workpiece defined by perforations therein thereby providing said formed workpiece with configured apertures and means for actuating said ejector means.
Claim 7
Dependent Claim
69 words
The improved hydraulic press of claim 4 said pIston having configured top and exterior side walls to provide a seating surface for at least the rim portion of said workpiece and means for biasing said at least the rim portion of said workpiece on said piston seating surface during forming and perforating of said workpiece, said biasing means being configured to impart a particular design to a formed workpiece.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |