Patent US2840304A successfully refreshed from Google Patents.
US5077901A
Expired / Lapsed
US
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Ceramic blades and production methodology therefor
Assignee: INDUSTRIAL CERAMICS Corp
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Filing: 1990-05-18
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Granted: 1992-01-07
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Expires: 2010-05-18
Abstract
Abstract A ceramic cutting blade includes a cutter portion having first and second side edges which converge at a distal acute angle to form a distal cutting tip and a cutting edge formed by first and second cutting faces oriented at a bevel angle. At least one of the cutting faces includes striations having a grain direction substantially perpendicular to the cutting edge, and these striations have a width of between 20 and 40 microns. The distal acute angle is preferably less than forty degrees, and the cutting tip is truncated along a straight line at an angle of truncation of at least forty degrees with respect to the cutting edge. The blade may be received by a handle or may be integrally molded with a handle portion.
Inventors
- 👤 Joseph A. Warner
- 👤 Leo A. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/0006; B23; B23P; B23P15/00; B23P15/28; B23P15/40; B23P15/403; B26B; B26B9/00; B26D2001/002; B26D2001/0053; B26D2001/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
166 words
A blade adapted to be held by a handle for use in performing cutting operations comprising a blade body having a mounting portion adapted to be received and retained by said handle and a cutter portion extends from said mounting portion, said cutter portion having first and second side edges at least one of said first and second side edges defining a cutting edge said first and second side edges converge at a distal acute angle with respect to one another of less than 40° to from a distal cutting tip that is truncated along a straight line at an angle of truncation with respect to said cutting edge, said cutting edge of at least 40° being formed by first and second cutting faces oriented at an acute bevel angle "b" with respect to one another, said mounting portion and said cutter portion fabricated out of an integral piece of ceramic material wherein said bevel angle "b" is within a range of 16° to 34°, inclusively.
Claim 2
Dependent Claim
166 words
A blade adapted to be held by a handle for use in performing cutting operations comprising a blade body having a mounting portion adapted to be received and retained by said handle and a cutter portion extends from said mounting portion, said cutter portion having first and second side edges at least one of said first and second side edges defining a cutting edge said first and second side edges converge at a distal acute angle with respect to one another of less than 40° to from a distal cutting tip that is truncated along a straight line at an angle of truncation with respect to said cutting edge, said cutting edge of at least 40° being formed by first and second cutting faces oriented at an acute bevel angle "b" with respect to one another, said mounting portion and said cutter portion fabricated out of an integral piece of ceramic material wherein said bevel angle "b" is within a range of 16° to 34°, inclusively.
Claim 3
Dependent Claim
17 words
A blade according to claim 1 wherein said distal acute angle is between 20° and 30°, inclusively.
Claim 4
Dependent Claim
51 words
A blade according to claim 1 wherein said cutter portion has a pair of side surfaces extending between said first and second side edges on either side thereof and wherein each of said cutting faces extend between said cutting edge and a respective side surface to define a cutting surface width.
Claim 5
Dependent Claim
44 words
A blade according to claim 3 wherein said cutter portion has a cutter portion reference plane located centrally between said side surfaces and extending longitudinally of said cutter portion substantially parallel to said cutting edge, said cutting edge being offset from the reference plane.
Claim 6
Dependent Claim
28 words
A blade according to claim 4 wherein one of said cutting surfaces has a cutting surface width that is wider than the width of the other cutting surface.
Claim 7
Dependent Claim
24 words
A blade according to claim 3 wherein each of said cutting surfaces has a grain direction that is substantially perpendicular to said cutting edge.
Claim 8
Dependent Claim
16 words
A blade according to claim 3 wherein said side surfaces are generally parallel to one another.
Claim 9
Dependent Claim
17 words
A blade according to claim 1 wherein said angle of truncation is between 40° and 50°, inclusively.
Claim 10
Dependent Claim
155 words
A blade adapted to be held by a handle for use in performing cutting operations comprising a blade body having a mounting portion adapted to be received and retained by said handle and a cutter portion attached to said mounting portion, said cutter portion having first and second side edges which converge to form a distal cutting tip and having a pair of side surfaces extending between said first and second side edges on either side of said cutter portion with at least one of said first and second side edges defining a cutting edge, said cutting edge being formed by first and second cutting faces oriented at an acute bevel angle with respect to one another said mounting portion and said cutter portion fabricated out of an integral piece of ceramic material with at least one of said cutting faces having striations having a grain direction that is substantially perpendicular to said cutting edge.
Claim 11
Dependent Claim
155 words
A blade adapted to be held by a handle for use in performing cutting operations comprising a blade body having a mounting portion adapted to be received and retained by said handle and a cutter portion attached to said mounting portion, said cutter portion having first and second side edges which converge to form a distal cutting tip and having a pair of side surfaces extending between said first and second side edges on either side of said cutter portion with at least one of said first and second side edges defining a cutting edge, said cutting edge being formed by first and second cutting faces oriented at an acute bevel angle with respect to one another said mounting portion and said cutter portion fabricated out of an integral piece of ceramic material with at least one of said cutting faces having striations having a grain direction that is substantially perpendicular to said cutting edge.
Claim 12
Dependent Claim
19 words
A blade according to claim 9 wherein said striations have a width of between 20 and 40 microns, respectively.
Claim 13
Dependent Claim
24 words
A blade according to claim 9 wherein one of said cutting faces is formed by a marginal portion of one of said side surfaces.
Claim 14
Dependent Claim
45 words
A blade according to claim 9 wherein each of said cutting faces is at an angle to a respective side surface and are each provided with said striations, each of said cutting faces extending from said cutting edge to intersect a respective said side surface.
Claim 15
Dependent Claim
27 words
A blade according to claim 9 wherein said first and second side edges converge at a distal acute angle within a range of 40° to 50°, inclusively.
Claim 16
Dependent Claim
23 words
A blade according to claim 13 wherein said distal cutting tip is truncated along a straight line to form said distal acute angle.
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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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |