Patent US4526747A successfully refreshed from Google Patents.
US4526747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fabricating parts such as gas turbine compressors
Assignee: Williams International Corp
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Filing: 1982-03-18
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Granted: 1985-07-02
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Expires: 2002-03-18
Abstract
Abstract The disclosure relates to a method of manufacturing a turbine wheel using an elastomeric mold for the acceptance of powdered metal. The powdered metal is cold isostatically pressed and thereafter heated to effect metallurgical bonding thereof.
Inventors
- 👤 William P. Schimmel
- 👤 Clifford S. Barker
- 👤 Dana P. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:29
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/34; B; B22; B22F; B22F3/00; B22F3/12; B22F3/1208; B22F3/1216; B22F3/1233; B22F5/00; B22F5/04; B22F7/00; B22F7/06; B22F7/08; F01D5/12; F01D5/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
A method of manufacturing a turbine wheel or the like comprising the steps of; (a) mounting a plurality of preformed blades in a pair of radially spaced, concentric rings, (b) filling the space between said rings and around said blades with an elastomeric material to form an elastomeric mold insert, having radially extending blades mounted therein, (c) mounting said mold insert and blades between elastomeric top and bottom plates, (d) sealing the radially outer face of said mold insert with an elastomeric material, (e) filling the space radially inwardly of said mold insert with powdered metal through an aperture in one of said plates, (f) sealing the aperture in said one plate with an elastomeric material to define a sealed elastomeric mold, (g) cold isostatic pressing the powder within said mold, (h) stripping said elastomeric mold and elastomeric mold insert from said pressed powdered metal and blades, and (i) heating said powdered metal and blades to effect metallurgical bonding thereof.
Claim 2
Independent Claim
160 words
A method of manufacturing a turbine wheel or the like comprising the steps of; (a) mounting a plurality of preformed blades in a pair of radially spaced, concentric rings, (b) filling the space between said rings and around said blades with an elastomeric material to form an elastomeric mold insert, having radially extending blades mounted therein, (c) mounting said mold insert and blades between elastomeric top and bottom plates, (d) sealing the radially outer face of said mold insert with an elastomeric material, (e) filling the space radially inwardly of said mold insert with powdered metal through an aperture in one of said plates, (f) sealing the aperture in said one plate with an elastomeric material to define a sealed elastomeric mold, (g) cold isostatic pressing the powder within said mold, (h) stripping said elastomeric mold and elastomeric mold insert from said pressed powdered metal and blades, and (i) heating said powdered metal and blades to effect metallurgical bonding thereof.
Claim 3
Dependent Claim
17 words
The method of claim 1 including the additional step of hot isostatic pressing the powder metal-blade assembly.
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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |