US5076027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for abrasive flow machining using multiple cylinders
Assignee: Extrude Hone LLC
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Filing: 1990-12-20
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Granted: 1991-12-31
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Expires: 2010-12-20
Abstract
Abstract An apparatus for abrading a workpiece surface by extruding a flowable plastic abrading medium through a passageway which includes said workpiece surface. The apparatus utilizes at least three chambers for feeding and receiving said medium whereby at least two of said chambers operate at differential parameters to effect differential abrasion on different surfaces of said workpiece.
Inventors
- 👤 Lawrence J. Rhoades
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/10; B24B31/116
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
The process for abrading selected surfaces on a workpiece by abrasive flow machining, the steps comprising: A. mounting the workpiece within a fixture such that the surfaces selected for abrasion are exposed within a plurality of passageways, said passageways having at least three ports of ingress and egress; and B. extruding a flowable plastic abrasive medium through said passageways selectively ingressing and egressing through said ports as necessary to effect the abrasion desired utilizing at least three positive displacement chambers adapted to independently feed and receive said medium, such that each of said chambers communicates with at least one of said ports.
Claim 2
Dependent Claim
102 words
The process for abrading selected surfaces on a workpiece by abrasive flow machining, the steps comprising: A. mounting the workpiece within a fixture such that the surfaces selected for abrasion are exposed within a plurality of passageways, said passageways having at least three ports of ingress and egress; and B. extruding a flowable plastic abrasive medium through said passageways selectively ingressing and egressing through said ports as necessary to effect the abrasion desired utilizing at least three positive displacement chambers adapted to independently feed and receive said medium, such that each of said chambers communicates with at least one of said ports.
Claim 3
Dependent Claim
16 words
A process according to claim 1 in which said passageways are at least in part intersecting.
Claim 4
Dependent Claim
37 words
A process according to claim 1 whereby different volumes of medium are extruded into said passageways through at least two of said ports at the same time to effect differential abrasion on different surfaces on said workpiece.
Claim 5
Dependent Claim
37 words
A process according to claim 2 whereby different volumes of medium are extruded into said passageways through at least two of said ports at the same time to effect differential abrasion on different surfaces on said workpiece.
Claim 6
Dependent Claim
33 words
A process according to claim 1 whereby differential back pressures are maintained at at least two ports of egress at the same time to effect differential abrasion on different surfaces on said workpiece.
Claim 7
Dependent Claim
33 words
A process according to claim 2 whereby differential back pressures are maintained at at least two ports of egress at the same time to effect differential abrasion on different surfaces on said workpiece.
Claim 8
Dependent Claim
33 words
A process according to claim 1 whereby differential extrusion pressures are maintained at at least two ports of ingress at the same time to effect differential abrasion on different surfaces on said workpiece.
Claim 9
Dependent Claim
33 words
A process according to claim 2 whereby differential extrusion pressures are maintained at at least two ports of ingress at the same time to effect differential abrasion on different surfaces on said workpieces.
Claim 10
Dependent Claim
47 words
A process according to claim 1 whereby differential extrusion pressures are maintained at at least two ports of ingress, and differential back pressures are maintained at at least two ports of egress, all at the same time to effect differential abrasion on different surfaces on said workpiece.
Claim 11
Dependent Claim
47 words
A process according to claim 2 whereby differential extrusion pressures are maintained at at least two ports of ingress, and differential back pressures are maintained at at least two ports of egress, all at the same time to effect differential abrasion on different surfaces on said workpiece.
References Cited (Backward Citations)
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Cited
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Cited
US3823514A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |