US4683148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing high quality plasma spray deposits of complex geometry
Assignee: General Electric Co
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Filing: 1986-05-05
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Granted: 1987-07-28
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Expires: 2006-05-05
Abstract
Abstract Dense layers of metals and compounds may be formed on a receiving surface of complex geometry by use of a plasma spray technique in a vacuum chamber in which multiple guns are used simultaneously to deposit material confronting areas.
Inventors
- 👤 John R. Rairden, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:08
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/12; C23C4/137; C23C4/134
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
The method of forming a dense deposit over a receiving surface of complex geometry which comprises directing a first plasma gun at a first aim point on said receiving surface of complex geometry to deposit material processed through said first gun onto a first portion of said receiving suface, simultaneously directing a second plasma gun at a different aim point of said receiving surface to deposit like material processed through said second gun onto a second portion of said receiving surface. the plasma flames from said two guns overlapping in a non-planar surface region between said aim points, the axes of said gun being at an angle to each other of greater than 20°, and said aim points being separated onto opposite or confronting surfaces of said complex geometry.
Claim 2
Independent Claim
129 words
The method of forming a dense deposit over a receiving surface of complex geometry which comprises directing a first plasma gun at a first aim point on said receiving surface of complex geometry to deposit material processed through said first gun onto a first portion of said receiving suface, simultaneously directing a second plasma gun at a different aim point of said receiving surface to deposit like material processed through said second gun onto a second portion of said receiving surface. the plasma flames from said two guns overlapping in a non-planar surface region between said aim points, the axes of said gun being at an angle to each other of greater than 20°, and said aim points being separated onto opposite or confronting surfaces of said complex geometry.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the aim points are on opposite sides of an acute angle.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the receiving surface is a turbine bucket.
Claim 5
Dependent Claim
29 words
The method of claim 1 wherein the receiving surface is contoured as an annular band and the aim points are at a side and bottom surface of said band.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein the receiving surface has corrugations and the guns are aimed at opposite sides of said corrugations.
Claim 7
Dependent Claim
27 words
The method of claim 1 wherein the receiving surface has sharp angular surface configurations and the guns are aimed at points on opposite sides of said surfaces.
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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |