Patent US4399676A successfully refreshed from Google Patents.
US4399676A
Expired / Lapsed
US
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Mandrel cleaning device for extrusion press
Assignee: KOBE SEIKO SEIKO SHO KK
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Filing: 1981-05-26
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Granted: 1983-08-23
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Expires: 2001-05-26
Abstract
Abstract A mandrel cleaning device capable of automatically performing cleaning operation in an extrusion press of the type which has a pressurizing stem for pressing a billet in a container toward a die and a mandrel axially slidable in and relative to the pressurizing stem for determining the internal shape of a hollow extruding material, the mandrel cleaning device having a rotary mechanism for rotating the mandrel about its axis, a grinder mechanism adapted to grind a tip portion at the fore end of the mandrel, and a transfer mechanism for moving the grinder mechanism toward and away from the mandrel.
Inventors
- 👤 Tatsuhiko Noyori
- 👤 Masakazu Ueda
- 👤 Masanobu Aoki
- 👤 Takashi Kajima
- 👤 Tsuneharu Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:39
CPC Classifications
B; B21; B21C; B21C35/00; B21C35/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
A mandrel cleaning device for an extrusion press including a pressurizing stem for pressing a billet in a container toward a die and a mandrel axially slidable in and relative to said pressurizing stem for determining the internal shape of a hollow extruding material, comprising: rotary drive means for rotating said mandrel about the axis thereof; grinder means for grinding an exterior tip portion at the fore end of said mandrel simultaneously with rotation of said mandrel by said rotary driven means; and transfer means for selectively moving said grinder means toward and away from said mandrel.
Claim 2
Dependent Claim
97 words
A mandrel cleaning device for an extrusion press including a pressurizing stem for pressing a billet in a container toward a die and a mandrel axially slidable in and relative to said pressurizing stem for determining the internal shape of a hollow extruding material, comprising: rotary drive means for rotating said mandrel about the axis thereof; grinder means for grinding an exterior tip portion at the fore end of said mandrel simultaneously with rotation of said mandrel by said rotary driven means; and transfer means for selectively moving said grinder means toward and away from said mandrel.
Claim 3
Dependent Claim
118 words
A mandrel cleaning device for an extrusion press including a pressurizing stem for pressing billet in a container toward a die and a mandrel axially slidable in and relative to said pressurizing stem for determining the internal shape of a hollow extruding material, comprising: rotary drive means for rotating said mandrel about the axis thereof; grinder means for grinding an exterior tip portion at the fore end of said mandrel simultaneously with rotation of said mandrel by said rotary drive means; a scalping ring axially slidably fitted on said mandrel; a back-up mechanism for backing up said scalping ring; and transfer means for selectively moving said grinder means and said back-up mechanism toward and away from said mandrel.
Claim 4
Dependent Claim
118 words
A mandrel cleaning device for an extrusion press including a pressurizing stem for pressing billet in a container toward a die and a mandrel axially slidable in and relative to said pressurizing stem for determining the internal shape of a hollow extruding material, comprising: rotary drive means for rotating said mandrel about the axis thereof; grinder means for grinding an exterior tip portion at the fore end of said mandrel simultaneously with rotation of said mandrel by said rotary drive means; a scalping ring axially slidably fitted on said mandrel; a back-up mechanism for backing up said scalping ring; and transfer means for selectively moving said grinder means and said back-up mechanism toward and away from said mandrel.
Claim 5
Dependent Claim
52 words
A mandrel cleaning device as set forth in claim 2, further comprising an electric control circuit including a preset counter for actuating said rotary drive means, said grinder means, said back-up mechanism and said transfer means at predetermined time intervals of a predetermined number of cycles of operation of said extrusion press.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |