US4438360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving device for effecting linear motion
Assignee: Individual
•
Filing: 1982-04-07
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Granted: 1984-03-20
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Expires: 2002-04-07
Abstract
Abstract An electrically operated driving device includes a bell type armature motor with a hollow shaft containing an internal thread. An axially extending threaded spindle is located within and in threaded engagement with the shaft. The rotation of the hollow shaft is transformed into liner motion effected by the spindle. The movement of the threaded spindle relative to the hollow shaft can afford a different speed and/or a different direction of rotation. The armature is of the iron-free or ironless type. The device operates at the least weight almost inertialess, and converts the produced power without significant friction losses and it can be used in a very limited space.
Inventors
- 👤 Kurt Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:21
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/06; H02K23/00; H02K23/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
An electrically operated driving device for effecting linear motion using an electric motor, comprising a non-ferrous bell-type armature having an axially extending hollow armature shaft with an internal thread, an elongated threaded spindle extending through and in threaded engagement with said hollow shaft and said threaded spindle being axially displaceable relative to said hollow armature shaft when said shaft is rotated.
Claim 2
Dependent Claim
61 words
An electrically operated driving device for effecting linear motion using an electric motor, comprising a non-ferrous bell-type armature having an axially extending hollow armature shaft with an internal thread, an elongated threaded spindle extending through and in threaded engagement with said hollow shaft and said threaded spindle being axially displaceable relative to said hollow armature shaft when said shaft is rotated.
References Cited (Backward Citations)
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US2978621A
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US3441761A
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US4201935A
Cited
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US4277706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |