Patent JPS5229006U successfully refreshed from Google Patents.
US3587294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary tube-testing presses
Assignee: Schloemann AG
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Filing: 1969-03-25
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Granted: 1971-06-28
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Expires: 1989-03-25
Abstract
Abstract A TUBE-TESTING PRESS HAVING A MAIN DRIVING SHAFT JOURNALED AT ONE END IN A STATIONARY BOLSTER AND AT THE OTHER END IN AN AXIALLY MOVABLE BOLSTER, WITH TESTING-HEAD CARRIES SECURED THEREON, AND A NUMBER OF TESTING HEADS DISPLACEABLE OVER STATIONARY CAMS, AND SYMMETRICALLY ARRANGED AROUND THE DRIVING SHAFT AND ROTATING ABOUT THE LATTER, WITH SEALING AND CLAMPING DEVICES LOCATED IN THE PIPE-TESTING HEADS. A PRESSURE-RAISER WITH A DIFFERENTIAL PISTON-AND-CYLINDER UNIT IN THE MAIN DRIVING SHAFT PROVIDES HIGH-PRESSURE LIQUID FOR ONE CYLINDER SPACE, THE OTHER CYLINDER SPACE BEING IN COMMUNICATION WITH A SOURCE OF LOW PRESSURE, FOR RETURNING THE PISTON. D R A W I N G
Inventors
- 👤 Erwin Kost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:56
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2846
Claims Analysis
Total Claims: 0
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |