US3286495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deformation compensating hydraulic device for rolling mills of the hydraulic mechanical pressure type
Assignee: Societe Nouvelle Spidem
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Filing: 1964-02-07
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Granted: 1966-11-22
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Expires: 1984-02-07
Abstract
No abstract record available.
Inventors
- 👤 Diolot Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:57
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/58; B21B37/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A SYSTEM FOR COMPENSATING FOR THE DEFORMATION OF WORKING ROLLS IN ROLLING MILLS OF THE TYPE INCLUDING A SCREWDOWN MECHANISM ASSOCIATED WITH RAM CYLINDERS THROUGH A HYDRAULIC SCREWDOWN CIRCUIT CONTAINING A CONSTANT VOLUME OF HYDRAULIC FLUID TO ADJUST THE ROLL SUPPORTING CHOCKS TO A ROLL CLEARANCE OF PREDETERMINED VALUE, COMPRISING (A) EXPANSIBLE EQUALIZING MEANS COMMUNICATING WITH SAID SCREWDOWN CIRCUIT AND ADAPTED TO RECEIVE THEREFROM AND RELEASE THEREINTO AMOUNTS OF SAID FLUID AS THE PRESSURE IN SAID CIRCUIT VARIES IN RESPONSE TO THE CHANGES IN SAID CLEARANCE CAUSED BY FLUCTUATING ROLL SEPARATING FORCES, (B) HYDRAULIC SERVO MEANS ADAPTED TO CAUSE CONTRACTION OR EXPANSION OF SAID EQUALIZING MEANS, (C) ELECTRIC CIRCUIT MEANS FOR SENSING AND COMPARING THE VARIATION OF PRESSURE IN SAID RAM CYLINDERS AND THE VARIATION OF EXPANSION OR CONTRACTION OF SAID EQUALIZING MEANS, SAID ELECTRIC CIRCUIT MEANS, RESPONSIVE TO THE COMPARISON OF SAID VARIATIONS ADAPTED TO ENERGIZE SAID HYDRAULIC SERVO MEANS TO RETURN SAID EQUALIZING MEANS IN A POSITION WHERE THE PRESSURE IN SAID SCREWDOWN CIRCUIT COUNTERACTS SAID SEPARATING FORCES TO SUCH AN EXTENT AS TO RE-ESTABLISH SAID PREDETERMINED CLEARANCE.
Claim 2
Independent Claim
180 words
A SYSTEM FOR COMPENSATING FOR THE DEFORMATION OF WORKING ROLLS IN ROLLING MILLS OF THE TYPE INCLUDING A SCREWDOWN MECHANISM ASSOCIATED WITH RAM CYLINDERS THROUGH A HYDRAULIC SCREWDOWN CIRCUIT CONTAINING A CONSTANT VOLUME OF HYDRAULIC FLUID TO ADJUST THE ROLL SUPPORTING CHOCKS TO A ROLL CLEARANCE OF PREDETERMINED VALUE, COMPRISING (A) EXPANSIBLE EQUALIZING MEANS COMMUNICATING WITH SAID SCREWDOWN CIRCUIT AND ADAPTED TO RECEIVE THEREFROM AND RELEASE THEREINTO AMOUNTS OF SAID FLUID AS THE PRESSURE IN SAID CIRCUIT VARIES IN RESPONSE TO THE CHANGES IN SAID CLEARANCE CAUSED BY FLUCTUATING ROLL SEPARATING FORCES, (B) HYDRAULIC SERVO MEANS ADAPTED TO CAUSE CONTRACTION OR EXPANSION OF SAID EQUALIZING MEANS, (C) ELECTRIC CIRCUIT MEANS FOR SENSING AND COMPARING THE VARIATION OF PRESSURE IN SAID RAM CYLINDERS AND THE VARIATION OF EXPANSION OR CONTRACTION OF SAID EQUALIZING MEANS, SAID ELECTRIC CIRCUIT MEANS, RESPONSIVE TO THE COMPARISON OF SAID VARIATIONS ADAPTED TO ENERGIZE SAID HYDRAULIC SERVO MEANS TO RETURN SAID EQUALIZING MEANS IN A POSITION WHERE THE PRESSURE IN SAID SCREWDOWN CIRCUIT COUNTERACTS SAID SEPARATING FORCES TO SUCH AN EXTENT AS TO RE-ESTABLISH SAID PREDETERMINED CLEARANCE.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |