Patent US4515629A successfully refreshed from Google Patents.
US4515629A
Expired / Lapsed
US
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Degassing metal powder
Assignee: RTX Corp
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Filing: 1981-02-12
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Granted: 1985-05-07
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Expires: 2001-02-12
Abstract
Abstract Apparatus and method for degassing fine powders of metals are disclosed. A vertical shell having a series of baffle plates inclined at an angle of repose is used to induce a serpentine path for the powder. The shell is subjected to suitable conditions of vibration temperature and pressure to maintain the desired flow rate and gas separation. Conditions of mesh size, pressure temperature, angle of repose as well as equipment configuration are discussed.
Inventors
- 👤 Frederick A. Dizek
- 👤 Eric S. Vogel
- 👤 C. John Tiedeman, Jr.
- 👤 Robert A. Herold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:19
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/005; B; B22; B22F; B22F1/00; B22F1/14; B22F1/142
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
142 words
The method of degassing a metal powder in an enclosed vertical shell containing a plurality of opposing inclined baffle plates fixed to the shell and positioned to cause powder to drop alternately in a downward direction from one baffle plate to the next along the vertical length of a region of the shell, characterized by measuring the static angle of repose of the the powder with respect to a horizontal and fixing the incline of the baffle plates at an angle with respect to the horizontal which is less than said static angle of repose; evacuating said region and heating said region to at least 500° F.; vibrating said region and the baffle plates contained therein to control the rate of powder flow across the baffles and along the said vertical length; and collecting the powder at the bottom of the shell.
Claim 2
Independent Claim
142 words
The method of degassing a metal powder in an enclosed vertical shell containing a plurality of opposing inclined baffle plates fixed to the shell and positioned to cause powder to drop alternately in a downward direction from one baffle plate to the next along the vertical length of a region of the shell, characterized by measuring the static angle of repose of the the powder with respect to a horizontal and fixing the incline of the baffle plates at an angle with respect to the horizontal which is less than said static angle of repose; evacuating said region and heating said region to at least 500° F.; vibrating said region and the baffle plates contained therein to control the rate of powder flow across the baffles and along the said vertical length; and collecting the powder at the bottom of the shell.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the tower is evacuated to a pressure of 1 torr or less.
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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |