US4282784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and lathe for machining out-of-round circumferences
Assignee: Goetze GmbH
•
Filing: 1979-06-05
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Granted: 1981-08-11
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Expires: 1999-06-05
Abstract
Abstract A method and apparatus for circumferentially machining an out-of-round workpiece in which the workpiece is rotated about its longitudinal axis at an irregular angular speed.
Inventors
- 👤 Otto Feller
- 👤 Heinz Oepen
- 👤 Manfred Kuhl
- 👤 Alois Skrobek
- 👤 Horst Bornefeld
- 👤 Hans G. Seiler
- 👤 Walter Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:08
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/08; B23Q15/10; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102; B23Q35/103; Y; Y10; Y10T; Y10T82/00; Y10T82/10; Y10T82/13; Y10T82/135; Y10T82/25; Y10T82/2502; Y10T82/2552; Y10T82/2554; Y10T82/2556
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A lathe for circumferentially machining an out-of-round workpiece comprising a supporting structure, a spindle rotatably mounted on said supporting structure, said spindle receiving at least one workpiece, and a variable speed drive for rotating said workpiece at an irregular angular speed, said drive comprising a motor and energy storage means interposed between said motor and said spindle for partially storing and discharging kinetic energy during each revolution of said spindle.
Claim 2
Dependent Claim
70 words
A lathe for circumferentially machining an out-of-round workpiece comprising a supporting structure, a spindle rotatably mounted on said supporting structure, said spindle receiving at least one workpiece, and a variable speed drive for rotating said workpiece at an irregular angular speed, said drive comprising a motor and energy storage means interposed between said motor and said spindle for partially storing and discharging kinetic energy during each revolution of said spindle.
Claim 3
Dependent Claim
33 words
A lathe as defined by claim 1 wherein said energy storage means comprises a cam disc secured to said spindle and a spring, said spring being placed under tension by said cam disc.
Claim 4
Dependent Claim
39 words
A lathe as defined by claim 2 wherein said energy storage means further comprises a pivot lever and a sensing roller rotatably attached to said pivot lever, said sensing roller rolling over said cam disc to tension said spring.
Claim 5
Dependent Claim
39 words
A lathe as defined by claim 3 wherein said energy storage means further comprises a torsion spring and a second cam disc, said torsion spring being positioned between the drive shaft of said motor and said second cam disc.
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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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |