Patent US4206570A successfully refreshed from Google Patents.
Patent US3248823A successfully refreshed from Google Patents.
US3248823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control system for abrasive wheel
Assignee: Finkl A and Sons Co
•
Filing: 1963-05-23
•
Granted: 1966-05-03
•
Expires: 1983-05-23
Abstract
No abstract record available.
Inventors
- 👤 Anthony W Finkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:42
CPC Classifications
B; B24; B24B; B24B47/00; B24B47/10; B24B47/18; B23; B23Q; B23Q15/00; Y; Y10; Y10S; Y10S451/00; Y10S451/915
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
A CONTROL SYSTEM FOR MAINTAINING THE PERIPHERAL SPEED OF A ROTATING ABRASIVE CUT OFF WHEEL BELOW A PREDETERMINED MAXIMUM SPEED LIMIT, SAID SYSTEM INCLUDING, IN COMBINATION, A HI SPEED CIRCUIT, SAID HI SPEED CIRCUIT, WHEN ENERGIZED, BEING EFFECTIVE TO RUN A MOTOR IN THE CIRCUIT AT A PRE-DETERMINED MAXIMUM SPEED, SAID MOTOR BEING ADAPTED FOR COMMUNICATION A CUT OFF WHEEL SHAFT IN DRIVING ENGAGEMENT THEREWITH, A LO SPEED CIRCUIT, SAID LO SPEED CIRCUIT, WHEN ENERGIZED, BEING EFFECTIVE TO RUN THE MOTOR AT A LOWER SPEED, FIRST SWITCH MEANS IN EACH CIRCUIT CLOSABLE ONLY IN RESPONSE TO THE PHYSICAL PRESENCE OF A WHEEL GUARD OF ANY SIZE, SAID FIRST SWITCH MEANS, WHEN OPEN, BEING EFFECTIVE TO OPEN BOTH CIRCUITS, AND SECOND SWITCH MEANS ASSOCIATED WITH THE HI SPEED CIRCUIT,
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |