US3791497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic shaft clutch
Assignee: Lohmann and Stolterfoht GmbH
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Filing: 1972-07-28
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Granted: 1974-02-12
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Expires: 1992-07-28
Abstract
Abstract Elastic clutches and couplings are disclosed in which the elastic components are bridged by a concentric coil-armature arrangement for attenuating oscillations between these parts which should rotate in unison.
Inventors
- 👤 E Fleischmann
- 👤 K Watzlawek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:36
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/043; F; F16; F16D; F16D3/00; F16D3/50; F16D3/76; F16F; F16F15/00; F16F15/10; F16F15/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
In an elastic shaft coupling or clutch for interconnecting a driving input and a driven output having a rigid outer ring, a rigid inner ring and elastic members interposed between inner and outer rings, the improvement comprising a coil connected to one of the rings for rotation therewith and following any rotational oscillations of the one ring; an armature connected to the other one of the rings and following any rotational oscillations of the other ring, and disposed relative to the coil in concentric relation thereto, there being an air gap between the coil and the armature, so that coil and armature are independently rotatable to each other and follow individually the rotation of driving input and driven outputs whenever the clutch or coupling is engaged; and means to feed electric current to the coil.
Claim 2
Dependent Claim
135 words
In an elastic shaft coupling or clutch for interconnecting a driving input and a driven output having a rigid outer ring, a rigid inner ring and elastic members interposed between inner and outer rings, the improvement comprising a coil connected to one of the rings for rotation therewith and following any rotational oscillations of the one ring; an armature connected to the other one of the rings and following any rotational oscillations of the other ring, and disposed relative to the coil in concentric relation thereto, there being an air gap between the coil and the armature, so that coil and armature are independently rotatable to each other and follow individually the rotation of driving input and driven outputs whenever the clutch or coupling is engaged; and means to feed electric current to the coil.
Claim 3
Dependent Claim
19 words
In an elastic coupling or clutch as in claim 1, the armature being provided with cooling fins or ribs.
Claim 4
Dependent Claim
25 words
In an elastic coupling or clutch as in claim 1, the armature being provided with a fan for blowing cooling air into the air gap.
Claim 5
Dependent Claim
43 words
In an elastic shaft coupling or clutch as in claim 1, wherein the outer ring is connected or connectable to the drive input of the coupling or clutch, and the inner ring is connected to the drive output of the coupling or clutch.
Claim 6
Dependent Claim
36 words
In a clutch or coupling as in claim 1, wherein the normally drive output of the clutch or coupling is connected to a drive shaft, the normally drive input of the clutch or coupling being free.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |