Patent US4044509A successfully refreshed from Google Patents.
US4044509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and device for grinding grooves
Assignee: US Philips Corp
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Filing: 1976-10-26
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Granted: 1977-08-30
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Expires: 1996-10-26
Abstract
Abstract A method of grinding fine grooves in workpieces of in particular ceramic material while using a wire sawing machine in which the wires are stretched in grooves on the outer circumference of a rotatable drum and project above the surface of the drum with a part of their cross-section.
Inventors
- 👤 Jules Bos
- 👤 Gunter Von Der Kall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:01
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/1871; B; B24; B24B; B24B19/00; B24B19/02; B24B19/028; G11B5/29
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A method of forming a number of shallow mutually parallel grooves in a workpiece which comprises: providing a drum having a plurality of axially spaced circumferential grooves, each groove carrying at least one metal wire, each wire extending above the circumferential surface of said drum; providing means for rotating said drum about the axis thereof; and pressing the workpiece against the circumferential surface of said drum to form grooves with said wires.
Claim 2
Independent Claim
72 words
A method of forming a number of shallow mutually parallel grooves in a workpiece which comprises: providing a drum having a plurality of axially spaced circumferential grooves, each groove carrying at least one metal wire, each wire extending above the circumferential surface of said drum; providing means for rotating said drum about the axis thereof; and pressing the workpiece against the circumferential surface of said drum to form grooves with said wires.
Claim 3
Independent Claim
15 words
The method as described inclaim 1, wherein each of said grooves has a V-shaped cross-section.
Claim 4
Independent Claim
65 words
A device for grinding shallow mutually parallel grooves in workpieces which comprises a drum having a set of axially spaced circumferential grooves; at least one stretched metal wire carried in each groove, the dimensional relationship between each wire and each groove carrying said wire being such that said wire protrudes above the surface of said drum, said device further including means for rotating said drum.
Claim 5
Independent Claim
65 words
A device for grinding shallow mutually parallel grooves in workpieces which comprises a drum having a set of axially spaced circumferential grooves; at least one stretched metal wire carried in each groove, the dimensional relationship between each wire and each groove carrying said wire being such that said wire protrudes above the surface of said drum, said device further including means for rotating said drum.
Claim 6
Dependent Claim
16 words
A device as claimed in claim 3, in which the circumferential groove has a V-shaped cross-section.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |