Patent US3239965A successfully refreshed from Google Patents.
US3239965A
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Ultrasonic grinding apparatus
Assignee: Sheffield Corp
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Filing: 1961-09-13
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Granted: 1966-03-15
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Expires: 1981-09-13
Abstract
No abstract record available.
Inventors
- 👤 Richard N Roney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:09
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/04; B06; B06B; B06B3/00; B24B1/00; B24B1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A GRINDING MACHINE, AN ABRASIVE DISC, A METALLIC DRIVING HUB TO WHICH SAID ABRASIVE DISC IS FIXED, MEANS FOR ROTATING SAID HUB AT GRINDING SPEED AND MEANS FOR IMPARTING ULTRASONIC VIBRATIONS IN AN AXIAL DIRECTION TO SAID HUB, THE RADIAL PLANE OF THE DISC HAVING A LOCATION SUBSTANTIALLY CORRESPONDING TO AN AXIAL NODAL ZONE OF THE HUB SO THAT AXIAL VIBRATIONS OF THE HUB PRODUCE RADIAL VIBRATIONS AT THE PERIPHERY OF THE DISC.
Claim 2
Dependent Claim
74 words
IN A GRINDING MACHINE, AN ABRASIVE DISC, A METALLIC DRIVING HUB TO WHICH SAID ABRASIVE DISC IS FIXED, MEANS FOR ROTATING SAID HUB AT GRINDING SPEED AND MEANS FOR IMPARTING ULTRASONIC VIBRATIONS IN AN AXIAL DIRECTION TO SAID HUB, THE RADIAL PLANE OF THE DISC HAVING A LOCATION SUBSTANTIALLY CORRESPONDING TO AN AXIAL NODAL ZONE OF THE HUB SO THAT AXIAL VIBRATIONS OF THE HUB PRODUCE RADIAL VIBRATIONS AT THE PERIPHERY OF THE DISC.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |