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US4131436A
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US
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Ophthalmic flat roughing wheel
Assignee: Individual
•
Filing: 1977-09-12
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Granted: 1978-12-26
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Expires: 1997-09-12
Abstract
Abstract An ophthalmic flat roughing wheel having a circumferential grinding layer made of a diamond-containing metallic matrix having greater diamond concentration in the center than at the edges. The wheel is made by bonding to the circumferential surface of a wheel blank, a diamond-containing metallic matrix of relatively high diamond concentration sandwiched between diamond-containing metallic matrixes of relatively lower diamond concentrations.
Inventors
- 👤 Ronald C. Wiand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:06
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
29 words
An ophthalmic flat roughing wheel having a circumferential layer made of a diamond-containing metallic matrix having a relatively greater concentration of diamond in the center than at the edges.
Claim 2
Dependent Claim
29 words
An ophthalmic flat roughing wheel having a circumferential layer made of a diamond-containing metallic matrix having a relatively greater concentration of diamond in the center than at the edges.
Claim 3
Dependent Claim
42 words
A wheel as recited in claim 1 wherein said diamond-containing metallic matrix has a diamond concentration of from about 0.10 to about 0.25 carats per gram at the edges and from about 0.26 to about 1.00 carats per gram at the center.
Claim 4
Dependent Claim
34 words
A wheel as recited in claim 1 wherein said diamond-containing metallic matrix has a diamond concentration at the center which is from 11/2 to 10 times greater than the diamond concentration at the edges.
Claim 5
Dependent Claim
35 words
An ophthalmic flat roughing wheel having a circumferential layer made of a diamond-containing metallic matrix comprising a center section and two edge sections, said center section having a greater diamond concentration than said edge sections.
Claim 6
Dependent Claim
35 words
An ophthalmic flat roughing wheel having a circumferential layer made of a diamond-containing metallic matrix comprising a center section and two edge sections, said center section having a greater diamond concentration than said edge sections.
Claim 7
Dependent Claim
44 words
A wheel as recited in claim 4 wherein said diamond-containing metallic matrix comprises two intermediate sections between said center section and each of said edge sections, said intermediate sections having a diamond concentration less than said center section but greater than said edge sections.
Claim 8
Dependent Claim
42 words
A wheel as recited in claim 5 wherein said diamond-containing metallic matrix comprises two additional sections between said center section and each intermediate section, said additional sections having a diamond concentration less than said center section but greater than said intermediate sections.
Claim 9
Dependent Claim
39 words
A wheel as recited in claim 4 wherein said diamond-containing metallic matrix comprises a multiplicity of sections between said center section and said edge sections, said multiplicity of sections being characterized by increasing diamond concentration towards said center section.
Claim 10
Dependent Claim
79 words
A process for making an ophthalmic flat roughing wheel comprising the steps of: (A) providing two first diamond-containing powdered metallic matrix mixtures having substantially equal diamond concentration; (B) providing a second diamond-containing powdered metallic matrix mixture having a relatively greater concentration of diamond particles than said first mixtures; (C) bonding a layer of said first and second mixtures to a blank wheel, said second mixture sandwiched between each of said first mixtures on the circumferential surface of said wheel.
Claim 11
Dependent Claim
79 words
A process for making an ophthalmic flat roughing wheel comprising the steps of: (A) providing two first diamond-containing powdered metallic matrix mixtures having substantially equal diamond concentration; (B) providing a second diamond-containing powdered metallic matrix mixture having a relatively greater concentration of diamond particles than said first mixtures; (C) bonding a layer of said first and second mixtures to a blank wheel, said second mixture sandwiched between each of said first mixtures on the circumferential surface of said wheel.
Claim 12
Dependent Claim
46 words
The process of claim 8 wherein two third diamond-containing powdered metallic matrix mixtures are sandwiched between said second mixture and each of said first mixtures in step (C), said third mixtures having a diamond concentration greater than said first mixture but less than said second mixtures.
Claim 13
Dependent Claim
46 words
The process of claim 9 wherein two fourth diamond-containing powdered matrix metal mixtures are sandwiched between said second mixture and each of said third mixtures in step (C), said fourth mixtures having a diamond concentration greater than said third mixtures but less than said second mixture.
Claim 14
Dependent Claim
13 words
The process of claim 8 wherein step (C) is carried out by sintering.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |