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Patent US4564000A successfully refreshed from Google Patents.
US4564000A
Expired / Lapsed
US
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Precision cutting of millimeter wave ferrite materials
Assignee: United States Department of the Army
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Filing: 1984-07-06
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Granted: 1986-01-14
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Expires: 2004-07-06
Abstract
Abstract Ferrite material to be used in millimeter wavelength apparatus is sawed ug a resin bonded diamond sawblade. A cutting speed of 5400 cm/sec is achieved by appropriate selection of sawblade diameter and spindle speed, such as 5.71 cm and 18,000 RPM. With this cutting speed and sawblade material a cut up to a maximum of 0.356 cm is possible while the ferrite is fed at from 0.0254 to 0.127 cm/sec.
Inventors
- 👤 Richard A. Stern
- 👤 Richard W. Babbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:57
CPC Classifications
B; B27; B27B; B27B5/00; B27B5/16; B27B5/22; B27B5/26; B28; B28D; B28D5/00; B28D5/0058; B28D5/0082; B28D5/0094; B28D5/02; B28D5/022; B28D5/024
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A method of precision cutting of millimeter wave ferrite material comprising: securing said ferrite material on a platform capable of controlled lateral movement; and moving said platform at a controlled feed rate of from 0.0254 to 0.127 cm/sec relative to a rotating transversely positioned circular saw; said circular saw having a diameter and a spindle speed which combine to yield a cutting speed of 5400 cm/sec and having a blade fabricated of resin bonded diamond material.
Claim 2
Independent Claim
76 words
A method of precision cutting of millimeter wave ferrite material comprising: securing said ferrite material on a platform capable of controlled lateral movement; and moving said platform at a controlled feed rate of from 0.0254 to 0.127 cm/sec relative to a rotating transversely positioned circular saw; said circular saw having a diameter and a spindle speed which combine to yield a cutting speed of 5400 cm/sec and having a blade fabricated of resin bonded diamond material.
Claim 3
Dependent Claim
32 words
A method of precision cutting of millimeter wave ferrite material in accordance with claim 1 wherein: said circular saw is set to make a cut of a maximum depth of 0.356 cm.
Claim 4
Dependent Claim
22 words
A method of precision cutting of millimeter wave ferrite material in accordance with claim 1 wherein: said spindle speed is 18,000 RPM.
Claim 5
Dependent Claim
28 words
A method of precision cutting of millimeter wave ferrite material in accordance with claim 1 wherein: said ferrite material is secured on said platform with a vacuum chuck.
Claim 6
Dependent Claim
96 words
Apparatus for precision cutting of millimeter wave ferrite material comprising: a circular saw blade; a rotatable spindle for vertically mounting said circular saw blade; motor means for rotating said spindle and said saw blade to provide a cutting speed of 5400 cm/sec.; a horizontally positioned platform for securing the ferrite material to be cut thereon; and motor drive means for moving said platform and ferrite material laterally at a controlled feed rate of from 0.0254 to 0.127 cm/sec across the path of said saw blade, said saw blade being fabricated of a resin bonded diamond material.
Claim 7
Dependent Claim
96 words
Apparatus for precision cutting of millimeter wave ferrite material comprising: a circular saw blade; a rotatable spindle for vertically mounting said circular saw blade; motor means for rotating said spindle and said saw blade to provide a cutting speed of 5400 cm/sec.; a horizontally positioned platform for securing the ferrite material to be cut thereon; and motor drive means for moving said platform and ferrite material laterally at a controlled feed rate of from 0.0254 to 0.127 cm/sec across the path of said saw blade, said saw blade being fabricated of a resin bonded diamond material.
Claim 8
Dependent Claim
24 words
Apparatus for precision cutting of millimeter wave ferrite material in accordance with claim 5 further including: means for applying a coolant to said blade.
Claim 9
Dependent Claim
58 words
Apparatus for precision cutting of millimeter wave ferrite material in accordance with claim 5 further including: a vacuum chuck for securing said ferrite material to said platform; and means for adjusting the height of said platform relative to said circular saw blade to provide a cut in said ferrite material up to a maximum depth of 0.356 cm.
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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |