Patent US3305974A successfully refreshed from Google Patents.
US3305974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine
Assignee: Thompson Grinder Co
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Filing: 1964-10-01
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Granted: 1967-02-28
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Expires: 1984-10-01
Abstract
No abstract record available.
Inventors
- 👤 John C Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:13
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/14; B24B53/00; B24B53/04; B24B53/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A GRINDING MACHINE ADAPTABLE FOR GRINDING SIMULTANEOUSLY BOTH SIDES OF A WAY, SAID MACHINE COMPRISING, A BASE, A WORK TABLE MOUNTED FOR RECIPROCATING MOVEMENT IN RELATION TO SAID BASE, A PAIR OF POWER DRIVEN GRINDING WHEELS ADJUSTABLY SUPPORTED ABOVE SAID TABLE, EACH OF SAID GRINDING WHEELS HAVING TWO CORRESPONDING GRINDING SURFACES, MEANS CONNECTED TO EACH SAID WHEEL FORMING AN AXIS OF ROTATION WHICH IS ANGULARLY ADJUSTABLE IN RELATION TO SAID TABLE, A DRESSING ROLL HAVING AN AXIS OF ROTATION PERPENDICULAR TO SAID TABLE AND MOUNTED FOR RECIPROCATING MOVEMENT WITH SAID TABLE FOR DRESSING ONE OF SAID CORRESPONDING GRINDING SURFACES ON EACH OF SAID WHEELS, AND A SECOND DRESSING TOOL MOUNTED FOR TRAVERSING MOVEMENT IN RELATION TO SAID TABLE AND ADAPTED TO DRESS THE SECOND OF SAID CORRESPONDING GRINDING SURFACES ON EACH OF SAID WHEELS.
Claim 2
Dependent Claim
134 words
A GRINDING MACHINE ADAPTABLE FOR GRINDING SIMULTANEOUSLY BOTH SIDES OF A WAY, SAID MACHINE COMPRISING, A BASE, A WORK TABLE MOUNTED FOR RECIPROCATING MOVEMENT IN RELATION TO SAID BASE, A PAIR OF POWER DRIVEN GRINDING WHEELS ADJUSTABLY SUPPORTED ABOVE SAID TABLE, EACH OF SAID GRINDING WHEELS HAVING TWO CORRESPONDING GRINDING SURFACES, MEANS CONNECTED TO EACH SAID WHEEL FORMING AN AXIS OF ROTATION WHICH IS ANGULARLY ADJUSTABLE IN RELATION TO SAID TABLE, A DRESSING ROLL HAVING AN AXIS OF ROTATION PERPENDICULAR TO SAID TABLE AND MOUNTED FOR RECIPROCATING MOVEMENT WITH SAID TABLE FOR DRESSING ONE OF SAID CORRESPONDING GRINDING SURFACES ON EACH OF SAID WHEELS, AND A SECOND DRESSING TOOL MOUNTED FOR TRAVERSING MOVEMENT IN RELATION TO SAID TABLE AND ADAPTED TO DRESS THE SECOND OF SAID CORRESPONDING GRINDING SURFACES ON EACH OF SAID WHEELS.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |