US3877975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic coating of metal tubes and similar work pieces
Assignee: Individual
•
Filing: 1973-04-12
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Granted: 1975-04-15
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Expires: 1993-04-12
Abstract
Abstract A method and means of continuously applying molten coating metal, as in galvanising of tubes or members which must pass through the galvanising bath in a straight line, in which the molten metal is passed through a zone beneath a reservoir for the molten metal from which molten metal is discharged onto the tube or rod and the flow around the tube or rod is controlled by a splash plate, and from which the excess coating material flows back to a kettle or the like from which it was originally pumped to the reservoir.
Inventors
- 👤 Anthony John Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:49
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/34; C23C2/36; C23C2/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
197 words
The method of continuously applying a molten metal galvanising coating to a metal tube or other work piece which must pass through the coating metal in a straight line inside a housing, said housing having an entrance opening and an exit opening equipped with a guide for the work piece, comprising heating the metal in a kettle to provide a body of liquid metal, pumping the molten metal into a reservoir located within the housing and above said kettle, allowing a controlled stream of molten metal to flow from said reservoir, passing the work piece through the housing along a path beneath said reservoir to allow the molten metal to flow over said work piece, disposing a splash plate beneath said work piece to control the flow of molten metal around the said work piece, allowing free flow of the molten metal outward of the end of the splash plate adjacent the exit opening and positioning the guide at the exit opening forward of the adjacent end of the splash plate so that the work piece will unobstructedly drag molten metal from the splash plate during its transit from the splash plate to the exit opening guide.
Claim 2
Independent Claim
197 words
The method of continuously applying a molten metal galvanising coating to a metal tube or other work piece which must pass through the coating metal in a straight line inside a housing, said housing having an entrance opening and an exit opening equipped with a guide for the work piece, comprising heating the metal in a kettle to provide a body of liquid metal, pumping the molten metal into a reservoir located within the housing and above said kettle, allowing a controlled stream of molten metal to flow from said reservoir, passing the work piece through the housing along a path beneath said reservoir to allow the molten metal to flow over said work piece, disposing a splash plate beneath said work piece to control the flow of molten metal around the said work piece, allowing free flow of the molten metal outward of the end of the splash plate adjacent the exit opening and positioning the guide at the exit opening forward of the adjacent end of the splash plate so that the work piece will unobstructedly drag molten metal from the splash plate during its transit from the splash plate to the exit opening guide.
Claim 3
Dependent Claim
60 words
The method of claim 1 wherein said splash plate is an open ended tube at least partly surrounding the lower part of said work piece, but opening to said reservoir to guide molten metal around said work piece and back to said kettle, and wherein heat exchange is effected between the splash plate and the molten metal in the kettle.
Claim 4
Dependent Claim
35 words
The method of claim 2 wherein said splash plate is tilted in relation to the direction of movement of the work piece to control flow of the molten metal along and around said work piece.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein a splash plate is used on each side of said work piece to guide molten metal around said work piece.
Claim 6
Dependent Claim
32 words
The method of claim 4 wherein the arrangement of said splash plates leaves an elongated opening beneath said work piece to allow return of molten metal to said kettle through said opening.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein a heat exchange is effected between the reservoir and the body of molten metal in the kettle.
Claim 8
Dependent Claim
14 words
The method of claim 6 wherein the reservoir is heated independently of the kettle.
Claim 9
Independent Claim
231 words
The method of continuously galvanising steel tubes or other work pieces which must pass through the galvanising bath in a straight line inside a housing which has an entrance opening and an exit opening for the work piece, comprising heating the galvanising bath in a kettle to form a molten mass, pumping the molten galvanising medium into a reservoir disposed above the said kettle and extending along the line of movement of the work piece, heating the molten galvanising medium in said reservoir to maintain galvanising temperature, allowing a controlled stream of galvanising medium to flow downward from the said reservoir through an opening in said reservoir, passing the work piece beneath the said reservoir to have the galvanising medium flow over the said work piece as it passes progressively beneath said reservoir, disposing at least one splash plate adjacent to said work piece to control the flow of the galvanising medium around and along the said work piece and back to said kettle, allowing free flow of the molten metal outward of the end of the splash plate which is adjacent the exit opening in the housing, and positioning the guide at the exit opening forward of the adjacent end of the splash plate so that the work piece will unobstructedly drag molten metal from the splash plate during its transit from the splash plate toward the exit opening guide.
Claim 10
Independent Claim
231 words
The method of continuously galvanising steel tubes or other work pieces which must pass through the galvanising bath in a straight line inside a housing which has an entrance opening and an exit opening for the work piece, comprising heating the galvanising bath in a kettle to form a molten mass, pumping the molten galvanising medium into a reservoir disposed above the said kettle and extending along the line of movement of the work piece, heating the molten galvanising medium in said reservoir to maintain galvanising temperature, allowing a controlled stream of galvanising medium to flow downward from the said reservoir through an opening in said reservoir, passing the work piece beneath the said reservoir to have the galvanising medium flow over the said work piece as it passes progressively beneath said reservoir, disposing at least one splash plate adjacent to said work piece to control the flow of the galvanising medium around and along the said work piece and back to said kettle, allowing free flow of the molten metal outward of the end of the splash plate which is adjacent the exit opening in the housing, and positioning the guide at the exit opening forward of the adjacent end of the splash plate so that the work piece will unobstructedly drag molten metal from the splash plate during its transit from the splash plate toward the exit opening guide.
Claim 11
Dependent Claim
22 words
The method of claim 8 wherein a heat exchange is effected between the molten medium in the reservoir and in the kettle.
Claim 12
Dependent Claim
14 words
The method of claim 9 wherein the reservoir is heated independently of the kettle.
References Cited (Backward Citations)
US3389010A
Cited
US3533761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |