US4873887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsion-vibration damper
Assignee: Carl Freudenberg KG
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Filing: 1987-11-05
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Granted: 1989-10-17
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Expires: 2007-11-05
Abstract
Abstract A torsion-vibration damper comprising a driving ring and take-off ring that are rotatable relative to each other, segment chambers spaced from the axis of rotation, the chambers being bounded by the driving ring and the take-off ring and divided into subchambers by a partition, the subchambers being connected by at least one connecting opening and having at least one boundary formed of a resilient wall part.
Inventors
- 👤 Rainer Andra
- 👤 Klaus Kurr
- 👤 Gunter Ullrich
- 👤 Udo Dorge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:51
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/16; F16F15/161
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A torsion-vibration damper for isolating small amplitude torsional vibrations and damping large amplitude torsional vibrations comprising: first and second rings having walls rotatable relative to each other about an axis of rotation; at least one liquid-filled chamber spaced from the axis of rotation, said chamber being circumferentially bounded by a wall of said first ring; said second ring including a partition dividing said at least one liquid-filled chamber into subchambers; at least one passage connecting said subchambers permitting flow therebetween for damping large amplitude torsional vibrations; and a resilient wall part forming at least part of the boundary of said subchambers, said resilient wall part isolating small amplitude torsional vibrations.
Claim 2
Dependent Claim
110 words
A torsion-vibration damper for isolating small amplitude torsional vibrations and damping large amplitude torsional vibrations comprising: first and second rings having walls rotatable relative to each other about an axis of rotation; at least one liquid-filled chamber spaced from the axis of rotation, said chamber being circumferentially bounded by a wall of said first ring; said second ring including a partition dividing said at least one liquid-filled chamber into subchambers; at least one passage connecting said subchambers permitting flow therebetween for damping large amplitude torsional vibrations; and a resilient wall part forming at least part of the boundary of said subchambers, said resilient wall part isolating small amplitude torsional vibrations.
Claim 3
Dependent Claim
19 words
The torsion-vibration damper of claim 1 wherein said resilient wall part is disposed between said subchambers and ambient air.
Claim 4
Dependent Claim
20 words
The torsion-vibration damper of claim 1 wherein at least part of the resilient wall part is disposed between said subchambers.
Claim 5
Dependent Claim
21 words
The torsion-vibration damper of claim 1 further comprising stops between which at least part of the resilient wall part is movable.
Claim 6
Dependent Claim
22 words
The torsion-vibration damper of claim 1 wherein said resilient wall part comprises a single part connected between said first and second rings.
Claim 7
Dependent Claim
26 words
The torsion-vibration damper of claim 5 wherein the inherent resiliency of said resilient wall part causes restoration of the rings after relative rotation of the rings.
Claim 8
Dependent Claim
18 words
The torsion-vibration damper of claim 6 wherein one of said ring is embedded in said resilient wall part.
Claim 9
Dependent Claim
21 words
The torsion-vibration damper of claim 7 wherein said partition is integrally formed with the ring embedded in the resilient wall part.
Claim 10
Dependent Claim
17 words
The torsion-vibration damper of claim 5 wherein said resilient wall part seals the rings from each other.
Claim 11
Dependent Claim
21 words
The torsion-vibration damper of claim 9 further comprising an inertial mass connected to said resilient wall part and said second ring.
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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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |