Patent US3634066A successfully refreshed from Google Patents.
US3634066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reclaiming scrap metal particles
Assignee: Dow Chemical Co
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Filing: 1969-06-26
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Granted: 1972-01-11
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Expires: 1989-06-26
Abstract
Abstract An aggregate of scrap metal particles is charged to an enclosed receptacle mounted above a molten-metal bath, the bath metal being oxidatively reactive with the atmosphere trapped in the receptacle. The receptacle is immersed in the molten bath metal such that either the base wall or a moveable cover of the receptacle is submerged below the surface of the bath, while maintaining the bath temperature preferably above the melting point of the scrap metal. Openings in the receptacle cover or base wall permit the bath metal to react with the receptacle atmosphere and thereby create a ''''self-generated'''' vacuum within the receptacle. Flow of molten metal into the receptacle, as induced by the vacuum environment, melts the scrap particles contained therein. The receptacle is then raised above the level of the metal bath to a point where the aggregate melt can drain through the openings in the receptacle base or cover and back into the molten metal bath.
Inventors
- 👤 Russell E Matthews
- 👤 Jack J Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:31
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20; C22B26/22; C22B7/00; C22B7/001; C22B7/003; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
The method of claim 1 wherein the metal comprising the molten metal bath is the same metal which comprises the scrap metal particle aggregate.
Claim 2
Dependent Claim
11 words
The method of claim 1 in which the metal is magnesium.
Claim 3
Independent Claim
262 words
A method of reclaiming scrap metal particles which comprises the steps of: providing a receptacle having a base wall with at least one opening therein and a solid cover, the cover being moveable between open and closed positions; substantially filling the receptacle with an aggregate of scrap metal particles and thereafter closing the receptacle cover; mounting the receptacle above the surface of a molten-metal bath such that the receptacle base wall lies adjacent the surface of the metal bath, the mounting means being adapted to raise and lower the receptacle; lowering the receptacle into the metal bath to a point where the opening in the receptacle base wall is submerged in the metal bath, while maintaining the temperature of the bath at least equal to the melting point of the scrap metal; holding the receptacle base wall submerged in the metal bath for a period of time sufficient for the molten metal to react with the atmosphere entrapped in the receptacle and thereby create a substantial vacuum condition in the receptacle to induce a flow of the molten metal into the receptacle through the base wall opening; maintaining the flow of molten metal into the receptacle for a period of time sufficient for the molten metal to completely melt the scrap metal particle aggregate; raising the receptacle to a point whereby the opening in the base wall is above the surface of the metal bath; opening the receptacle cover to thereby induce the metal aggregate melt to flow out of the receptacle through the base wall openings and into the molten-metal bath.
Claim 4
Independent Claim
209 words
A method of reclaiming scrap metal particles which comprises the steps of: providing a receptacle having an enclosed base and an open top, the top including a perforated cover moveable between open and closed positions; substantially filling the receptacle with an aggregate of scrap metal particles and thereafter closing the receptacle cover; lowering the entire receptacle into a molten-metal bath to a point whereby the receptacle cover is submerged beneath the surface of the metal bath, while maintaining the temperature of tHe bath at least equal to the melting point of the scrap metal; holding the receptacle submerged in the metal bath for a period of time sufficient for the molten metal to react with the atmosphere entrapped in the receptacle and thereby create a substantial vacuum condition in the receptacle to induce a flow of the molten metal into the receptacle through the perforated cover; maintaining the flow of molten metal into the receptacle for a period of time sufficient for the molten metal to completely melt the scrap metal particle aggregate; raising the receptacle above the surface of the metal bath and tipping the receptacle to a position thereby the aggregate melt will flow out of the receptacle through the perforated cover and into the molten-metal bath.
References Cited (Backward Citations)
US1629563A
Cited
US3396777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |