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US4383785A
Expired / Lapsed
US
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Method for milling and drilling glass
Assignee: National Aeronautics and Space Administration
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Filing: 1980-07-30
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Granted: 1983-05-17
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Expires: 2000-07-30
Abstract
Abstract A process for machining glass by placing a rotating carbide working surface under minimum pressure against an area of glass to be worked and concurrently wetting the region between the working surface and the area of glass with a lubricant consisting essentially of a petroleum carrier, a complex mixture of esters and a complex mixture of naturally occurring aromatic oils.
Inventors
- 👤 Stephen H. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:45
CPC Classifications
F; F16; F16N; F16N15/00; B; B23; B23B; B23B51/00; B23B51/02; C; C03; C03B; C03B40/00; C03B40/02; B23B2226/00; B23B2226/45; B23B2251/00; B23B2251/18; Y; Y10; Y10T; Y10T408/00; Y10T408/03; Y10T408/44; Y10T408/46; Y10T409/00; Y10T409/30; Y10T409/303752
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A process for machining glass, comprising the steps of: placing a carbide working surface of a solid tool against an area of a glass workpiece; wetting the working surface with a lubricant consisting essentially of a middle molecular weight petroleum distillate carrier, a complex mixture of esters, and a complex mixture of naturally occurring aromatic oils; and driving said wetted working surface with continuous motion and minimal pressure against said glass workpiece area.
Claim 2
Dependent Claim
73 words
A process for machining glass, comprising the steps of: placing a carbide working surface of a solid tool against an area of a glass workpiece; wetting the working surface with a lubricant consisting essentially of a middle molecular weight petroleum distillate carrier, a complex mixture of esters, and a complex mixture of naturally occurring aromatic oils; and driving said wetted working surface with continuous motion and minimal pressure against said glass workpiece area.
Claim 3
Dependent Claim
71 words
A process for machining glass, comprising the steps of: placing a rotating carbide working surface subject to minimum pressure against an area of glass to be worked; wetting the region between the working surface and the area to be worked with a lubricant consisting essentially of a mixture of a middle molecular weight petroleum distillate, a complex mixture of synthetic esters, and a complex mixture of natural occurring, purified aromatic oils.
Claim 4
Dependent Claim
71 words
A process for machining glass, comprising the steps of: placing a rotating carbide working surface subject to minimum pressure against an area of glass to be worked; wetting the region between the working surface and the area to be worked with a lubricant consisting essentially of a mixture of a middle molecular weight petroleum distillate, a complex mixture of synthetic esters, and a complex mixture of natural occurring, purified aromatic oils.
Claim 5
Dependent Claim
27 words
The process set forth in claims 1 or 2, wherein said carbide working surface is a double fluted drill ground with a plurality of adjoining point angles.
Claim 6
Dependent Claim
27 words
The process set forth in claims 1 or 2 wherein said working surface is driven at a speed on the order of hundreds of motions per minute.
Claim 7
Dependent Claim
18 words
The process set forth in claim 3 wherein the drill has a diameter between 0.125 and 0.018 inches.
Claim 8
Dependent Claim
84 words
A process for machining glass, comprising the steps of: driving a tool having a working surface of a material exhibiting a hardness greater than glass with continuous motion and minimal pressure against a glass workpiece; and wetting the region between said working surface and said glass workpiece with a liquid phase lubricant consisting essentially of a complex mixture of synthetic esters, a complex mixture of purified aromatic oils of plant origin arranged with a definite distribution, and a middle molecular weight petroleum distillate carrier.
Claim 9
Dependent Claim
84 words
A process for machining glass, comprising the steps of: driving a tool having a working surface of a material exhibiting a hardness greater than glass with continuous motion and minimal pressure against a glass workpiece; and wetting the region between said working surface and said glass workpiece with a liquid phase lubricant consisting essentially of a complex mixture of synthetic esters, a complex mixture of purified aromatic oils of plant origin arranged with a definite distribution, and a middle molecular weight petroleum distillate carrier.
Claim 10
Dependent Claim
10 words
The process of claim 6 wherein said tool is solid.
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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |