Patent US3323731A successfully refreshed from Google Patents.
US3323731A
Expired / Lapsed
US
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Grinding apparatus primarily for lignocellulose containing material
Assignee: Valmet AB
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Filing: 1964-06-22
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Granted: 1967-06-06
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Asplund Arne Johan Arthur
- 👤 Reinhall Rolf Bertil
- 👤 Johansson Johan Gunnar Inge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:19
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/30; D21D1/303; B; B02; B02C; B02C7/00; B02C7/02; B02C7/06; B02C7/11; B02C7/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
A GRINDING APPARATUS, PRIMARILY INTENDED FOR LIGNOCELLULOSE CONTAINING MATERIAL AND PROVIDED WITH TWO ROTATABLE GRINDING DISCS DISPOSED WITHIN A CASING AND EACH COOPERATING WITH A STATIONARY GRINDING DISC, INLET AND DISCHARGE CHANNELS FOR THE MATERIAL BEING PROVIDED IN THE CASING FOR EACH PAIR OF CO-OPERATING GRINDING DISCS, AND A BASE STRUCTURE FOR SAID APPARATUS; CHARACTERIZED IN THAT EACH OF THE ROTATING DISCS IS SUPPORTED BY A SHAFT OF WHICH SHAFTS ONE IS POSITIONED CONCENTRICALLY AROUND THE OTHER SHAFT AND WHICH SHAFTS BOTH ARE DISPLACEABLE AXIALLY UNDER THE ACTION OF PRESSURE FLUID ACTUATED SERVO-MOTORS.
Claim 2
Dependent Claim
93 words
A GRINDING APPARATUS, PRIMARILY INTENDED FOR LIGNOCELLULOSE CONTAINING MATERIAL AND PROVIDED WITH TWO ROTATABLE GRINDING DISCS DISPOSED WITHIN A CASING AND EACH COOPERATING WITH A STATIONARY GRINDING DISC, INLET AND DISCHARGE CHANNELS FOR THE MATERIAL BEING PROVIDED IN THE CASING FOR EACH PAIR OF CO-OPERATING GRINDING DISCS, AND A BASE STRUCTURE FOR SAID APPARATUS; CHARACTERIZED IN THAT EACH OF THE ROTATING DISCS IS SUPPORTED BY A SHAFT OF WHICH SHAFTS ONE IS POSITIONED CONCENTRICALLY AROUND THE OTHER SHAFT AND WHICH SHAFTS BOTH ARE DISPLACEABLE AXIALLY UNDER THE ACTION OF PRESSURE FLUID ACTUATED SERVO-MOTORS.
Claim 3
Dependent Claim
36 words
THE GRINDING APPARATUS AS CLAIMED IN CLAIM 1, CHARACTERIZED IN THAT THE CASINGS ARE FORMED FOR APPLICATION OF THE CHANNELS IN PARALLEL RELATION TO, OR BY ATTACHMENT OF A SOCKET, IN A SERIES WITH ONE ANOTHER.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |