Patent US3208257A successfully refreshed from Google Patents.
US3208257A
Expired / Lapsed
US
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Device for shaping rotational or angular objects
Assignee: Smeralovy Zavody np
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Filing: 1963-08-21
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Granted: 1965-09-28
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Expires: 1983-08-21
Abstract
No abstract record available.
Inventors
- 👤 Holub Jiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:30
CPC Classifications
B; B21; B21H; B21H1/00; B21H1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
ROLLING APPARATUS FOR SHAPING ROTATIONAL OBJECTS BY ANGULAR ROLLING BETWEEN TWO OPPOSITELY MOVING SURFACES OF EXCHANGEABLE TOOLS OF TRIANGULAR SHAPE, FIXED ON A CYLINDRICAL SURFACE WITH ANGULARLY DISPSED REDUCING SURFACES WHICH CREATE A GRADUALLY INCREASING STARTING RIDGE, HAVING ON THE TOOLS, IN ADDITION TO SAID REDUCING SURFACES, WEDGE-SHAPED CALIBRATING SURFACES WHICH ARE PROVIDED WITH NARROW SPREADING SURFACES, SAID SPREADING SURFACES BEING ARRANGED BETWEEN SAID REDUCING SURFACES AND BEING CONSTRUCTED TO DISPLACE THE EXCESS OF MATERIAL FROM THE CENTER TO BOTH ENDS OF THE OBJECT TO BE ROLLED DURING ONE REVOLUTION OF SAID WORKING TOOLS.
Claim 2
Dependent Claim
94 words
ROLLING APPARATUS FOR SHAPING ROTATIONAL OBJECTS BY ANGULAR ROLLING BETWEEN TWO OPPOSITELY MOVING SURFACES OF EXCHANGEABLE TOOLS OF TRIANGULAR SHAPE, FIXED ON A CYLINDRICAL SURFACE WITH ANGULARLY DISPSED REDUCING SURFACES WHICH CREATE A GRADUALLY INCREASING STARTING RIDGE, HAVING ON THE TOOLS, IN ADDITION TO SAID REDUCING SURFACES, WEDGE-SHAPED CALIBRATING SURFACES WHICH ARE PROVIDED WITH NARROW SPREADING SURFACES, SAID SPREADING SURFACES BEING ARRANGED BETWEEN SAID REDUCING SURFACES AND BEING CONSTRUCTED TO DISPLACE THE EXCESS OF MATERIAL FROM THE CENTER TO BOTH ENDS OF THE OBJECT TO BE ROLLED DURING ONE REVOLUTION OF SAID WORKING TOOLS.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |