US5314512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive tool
Assignee: Individual
•
Filing: 1993-08-10
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Granted: 1994-05-24
•
Expires: 2013-08-10
Abstract
Abstract An abrasive tool such as a grinding wheel or a saw is characterized by the working portion comprising a mass of ultra-hard abrasive particles dispersed in a non-porous thermoplastic polymer matrix. Examples of suitable thermoplastic polymers are polyetheretherketone, polyaryletherketone, poly (amide-imide), polyphenylene sulphide, liquid crystal polymer and mixtures thereof.
Inventors
- 👤 John S. Sexton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:12
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/30; B23; B23D; B23D61/00; B23D61/18; B23D61/185; B24D5/00; B24D5/12; B24D5/123; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121; B28D1/122
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A method for preparing an injection molded saw segment comprises the steps of: (a) heating a mass of ultra-hard abrasive particles dispersed in a non-porous thermoplastic polymer matrix in the barrel of an injection molding machine at a temperature of from about 280° to 400° C., wherein the abrasive content of the segment is at least 4 volume percent; (b) injecting said heated product of step (a) into a mold at a pressure of from about 70 MPa to 150 MPa; and (c) maintaining said injected product of step (b) in said mold at a pressure of about 35 MPa to about 75 MPa for a period of from about 2 to about 10 seconds.
Claim 2
Independent Claim
115 words
A method for preparing an injection molded saw segment comprises the steps of: (a) heating a mass of ultra-hard abrasive particles dispersed in a non-porous thermoplastic polymer matrix in the barrel of an injection molding machine at a temperature of from about 280° to 400° C., wherein the abrasive content of the segment is at least 4 volume percent; (b) injecting said heated product of step (a) into a mold at a pressure of from about 70 MPa to 150 MPa; and (c) maintaining said injected product of step (b) in said mold at a pressure of about 35 MPa to about 75 MPa for a period of from about 2 to about 10 seconds.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the heating step (a) is conducted at a temperature of from about 150° to 200° C.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the thermoplastic polymer contains a particulate or fiber filler in an amount of up to 40 percent by volume.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein the ultra-hard abrasive particles have a size ranging from 50 to 900 microns.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein the concentration of the abrasive particles content of the segment is in the range of from 4 to 20 volume percent.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein the concentration of the abrasive particles content of the segment is from 15 to 30 volume percent.
Claim 8
Dependent Claim
23 words
The method of claim 1 wherein the abrasive particles are selected from single crystal diamond, single crystal CBN, polycrystalline diamond and polycrystalline CBN.
Claim 9
Dependent Claim
23 words
The method of claim 1 wherein the thermoplastic polymer is selected from polyetheretherketone; polyetherketone, polyaryletherketone, poly(amide-imide), polyphenylene sulphide, LCP polymers and mixtures thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |