US5316720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser shock and sintering method for particulate densification
Assignee: Boeing North American Inc
•
Filing: 1992-11-20
•
Granted: 1994-05-31
•
Expires: 2012-11-20
Abstract
Abstract The present invention describes a process for the compaction and densification of discrete powder materials utilizing a high amplitude stress wave which produces a high pressure condition at a surface of the particles thereby driving said stress wave into and through the particles.
Inventors
- 👤 Lyle B. Spiegel
- 👤 William E. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:17
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/02; B29C67/04; B22; B22F; B22F10/00; B22F10/20; B22F10/28; B22F10/60; B22F10/64; B22F12/00; B22F12/40; B22F12/41; B22F12/43; B22F12/44; B22F3/00; B22F3/004; B23; B23K; B23K26/00; B23K26/352; B23K26/356; B22F12/38; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0838; B29C43/00; B29C43/02; B29C43/10; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A method of forming an article of manufacture comprising: (a) generating a pressure pulse with a laser; (b) producing a pressure condition at a surface of discrete powder particles, thereby driving a stress wave into and through the particles; (c) heating a surface portion of said discrete powder particles via partial absorption by said particles of a laser generated beam; and (d) densifying the particles by the effect of the imparted stress wave and surface heating; (e) sintering the article.
Claim 2
Independent Claim
80 words
A method of forming an article of manufacture comprising: (a) generating a pressure pulse with a laser; (b) producing a pressure condition at a surface of discrete powder particles, thereby driving a stress wave into and through the particles; (c) heating a surface portion of said discrete powder particles via partial absorption by said particles of a laser generated beam; and (d) densifying the particles by the effect of the imparted stress wave and surface heating; (e) sintering the article.
Claim 3
Dependent Claim
26 words
A method of claim 1 wherein an overlay is placed over at least a portion of said surface of said particles to increase the stress wave.
Claim 4
Dependent Claim
25 words
A method of claim 1 wherein an acoustic material is positioned adjacent said discrete powder particles to damp said stress wave passing through said particles.
Claim 5
Independent Claim
24 words
A method of forming an article of manufacture comprising densifying discrete powder particles with a laser generated pressure pulse and then sintering the article.
Claim 6
Independent Claim
24 words
A method of forming an article of manufacture comprising densifying discrete powder particles with a laser generated pressure pulse and then sintering the article.
Claim 7
Dependent Claim
13 words
A method of claim 1 wherein the sintering is by hot isostatic pressing.
Claim 8
Dependent Claim
13 words
A method of claim 4 wherein the sintering is by hot isostatic pressing.
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) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |