US3623716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for hardening pipes internally and externally
Assignee: Vodafone GmbH
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Filing: 1969-07-18
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Granted: 1971-11-30
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Expires: 1989-07-18
Abstract
Abstract An apparatus for hardening long pipes internally and externally has a tank arranged to be filled with a cooling medium and being sufficiently large to receive the pipe on its interior, a cooling medium nozzle disposed near one end of the tank and supplied with cooling medium; the nozzle has a body and a tip arranged for introducing cooling medium in the pipe in such a manner that a part of the tip is within and peripherally spaced from the end of the pipe at which the cooling medium is introduced, whereby cooling medium may be drawn from the exterior of the pipe to the interior through the space thus defined; and pipe loading and unloading means for delivering a pipe into the tank and for supporting it in the tank while it is being hardened and for subsequently unloading the pipe after it has been hardened.
Inventors
- 👤 Werner Fritsch
- 👤 Anton Dunnewald
- 👤 Hans Ribken
- 👤 Friedrich Wilhelm Kruppert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:04
CPC Classifications
B; B21; B21B; B21B45/00; B21B45/02; B21B45/0203; B21B45/0209; B21B45/0215; B21B45/023; C; C21; C21D; C21D9/00; C21D9/08; C21D9/085
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
230 words
Apparatus for hardening long pipes internally and externally, the said apparatus comprising a long tank adapted to be filled with cooling medium, such as water, a cooling medium nozzle at one end of said tank adapted to be connected to a cooling medium pump, said cooling medium nozzle having a body and a tip for introducing cooling medium into the pipe, and means for holding the nozzle, in operation, so that part of the tip is within and peripherally spaced from the end of the pipe at which the cooling medium is introduced, whereby cooling medium may be drawn from the exterior of the pipe to the interior through the space thus defined, pipe-loading means for loading a pipe into the tank, pipe support and unloading means for supporting a pipe in the tank while it is being hardened and for unloading the pipe aFter it has been hardened, and means for conducting an unloaded pipe away from the tank, said pipe support and unloading means comprising a plurality of arms distributed along the length of the tank, means mounting said arms for vertical swinging movement about horizontal pivot means, said horizontal pivot means being located outside the tank approximately on a level with the cooling medium nozzle in the tank, and drive means for effecting such swinging movement of the arms when desired, said arms having substantially V-shaped ends.
Claim 2
Dependent Claim
230 words
Apparatus for hardening long pipes internally and externally, the said apparatus comprising a long tank adapted to be filled with cooling medium, such as water, a cooling medium nozzle at one end of said tank adapted to be connected to a cooling medium pump, said cooling medium nozzle having a body and a tip for introducing cooling medium into the pipe, and means for holding the nozzle, in operation, so that part of the tip is within and peripherally spaced from the end of the pipe at which the cooling medium is introduced, whereby cooling medium may be drawn from the exterior of the pipe to the interior through the space thus defined, pipe-loading means for loading a pipe into the tank, pipe support and unloading means for supporting a pipe in the tank while it is being hardened and for unloading the pipe aFter it has been hardened, and means for conducting an unloaded pipe away from the tank, said pipe support and unloading means comprising a plurality of arms distributed along the length of the tank, means mounting said arms for vertical swinging movement about horizontal pivot means, said horizontal pivot means being located outside the tank approximately on a level with the cooling medium nozzle in the tank, and drive means for effecting such swinging movement of the arms when desired, said arms having substantially V-shaped ends.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1, characterized in that at least one stop element for abutting against the end of the pipe is mounted on the nozzle.
Claim 4
Dependent Claim
50 words
Apparatus according to claim 1, characterized in that the body of the nozzle comprises a tubular sleeve portion adapted to be mounted for axial sliding movement on a cooling medium pipeline connected to a cooling medium pump, which pipeline projects into the container coaxially with the pipe to be hardened.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 3 including spring means for cushioning the nozzle in its axial sliding movement.
Claim 6
Dependent Claim
25 words
Apparatus according to claim 3 including clamps for holding the pipe, said clamps being connected to the tubular sleeve by a guide piece and levers.
Claim 7
Dependent Claim
30 words
Apparatus according to claim 1 characterized in that deflecting plates for deflecting the flow emerging from the pipe are provided in the end of the container remote from the nozzle.
Claim 8
Dependent Claim
28 words
Apparatus according to claim 1 characterized in that apertured conduits for supplying cooling liquid are provided in the container on both sides of the pipe to be hardened.
Claim 9
Dependent Claim
15 words
Apparatus according to claim 1, characterized in that the tip of the nozzle is interchangeable.
Claim 10
Dependent Claim
18 words
Apparatus as claimed in claim 1, including means for adjusting the extent of downward movement of said arms.
Claim 11
Dependent Claim
13 words
Apparatus as claimed in claim 9, wherein said means comprise interchangeable stop members.
Claim 12
Dependent Claim
42 words
Apparatus as claimed in claim 1 characterized in that the means for conducting the unloaded pipes away from the tank has an initial part inclined transversely to the direction of movement of the pipes, whereby cooling medium is drained from the pipes.
Claim 13
Dependent Claim
50 words
Apparatus as claimed in claim 1, characterized in that a final portion of the pipe-loading means is in the form of a sloping rolloff bed terminating a substantial distance above the pipe support means and allowing the pipe to be hardened to fall freely on to the said support means.
Claim 14
Dependent Claim
29 words
Apparatus as claimed in claim 1, characterized in that the cooling medium tank has at least one overflow aperture in the region of said one end of the tank.
Claim 15
Dependent Claim
26 words
Apparatus as claimed in claim 13, characterized in that the overflow apertures are arranged immediately adjacent the end wall of the tank and on both sides.
References Cited (Backward Citations)
US585868A
Cited
US3212766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |