US3761574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isostatic clamp press
Assignee: AUTOCLANE ENGINEERS Inc
•
Filing: 1972-03-24
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Granted: 1973-09-25
•
Expires: 1992-03-24
Abstract
Abstract A multicavity isostatic hydraulic clamp press where the clamp cylinder and piston rod act as the press frame and which is adapted to fully automatic operation.
Inventors
- 👤 N Rietmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
An isostatic press comprising, a base platen, a clamp cylinder mounted on the platen, pressure chambers for isostatic pressing fluid mounted on the platen in a circle around the cylinder, said chambers having open ends on opposite sides of the cylinder, a piston in the cylinder, a cross bar, means for mounting the mid section of the cross bar in thrust relation to the piston and for rotation relative to the piston in a plane normal to the axis of the cylinder with the ends of the cross bar adapted to be pulled by the piston into sealing engagement with the open ends of the pressure chambers, said piston and cylinder comprising the frame of the press taking the load exerted by the pressure chambers on the base platen and cross bar, a flexible envelope means in said chambers, and means for supplying fluid pressure to said chambers for isostatic pressing material within said envelope means.
Claim 2
Dependent Claim
156 words
An isostatic press comprising, a base platen, a clamp cylinder mounted on the platen, pressure chambers for isostatic pressing fluid mounted on the platen in a circle around the cylinder, said chambers having open ends on opposite sides of the cylinder, a piston in the cylinder, a cross bar, means for mounting the mid section of the cross bar in thrust relation to the piston and for rotation relative to the piston in a plane normal to the axis of the cylinder with the ends of the cross bar adapted to be pulled by the piston into sealing engagement with the open ends of the pressure chambers, said piston and cylinder comprising the frame of the press taking the load exerted by the pressure chambers on the base platen and cross bar, a flexible envelope means in said chambers, and means for supplying fluid pressure to said chambers for isostatic pressing material within said envelope means.
Claim 3
Dependent Claim
33 words
The press of claim 1 having a table top with an upper surface lying in a plane normal to the axis of the cylinder and common to the open ends of said chambers.
Claim 4
Dependent Claim
31 words
The press of claim 1 having material feed nozzles and means for indexing the feed nozzles into registry with the open ends of the chambers by rotation of the cross bar.
Claim 5
Dependent Claim
27 words
The press of claim 1 in which the envelope means has open upper ends sealed to the chambers in register with the open ends of the chambers.
Claim 6
Dependent Claim
17 words
The press of claim 4 in which the isostatic pressure is supplied external to the evelope means.
Claim 7
Dependent Claim
18 words
The press of claim 3 in which the feed nozzles are on hoppers carried by the cross bar.
References Cited (Backward Citations)
US3172153A
Cited
US3677674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |