Patent US4680984A successfully refreshed from Google Patents.
US4680984A
Expired / Lapsed
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Torsional vibration damper
Assignee: SGF Sueddeutsche Gelenkscheibenfabrik GmbH and Co KG
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Filing: 1985-05-20
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Granted: 1987-07-21
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Expires: 2005-05-20
Abstract
Abstract A support (10) having fastening spots (12) for mounting at a shaft flange is enclosed by a flywheel (18) at a radial spacing and connected to the same by rubber-elastic spring elements (20) arranged circumferentially spaced from one another. The spring elements (20) are formed with rolling curves (22,24) between which rigid rolling bodies (32) are supported under radial bias. The rolling bodies (32) are inserted upon vulcanizing of the spring elements (20). The diameter of the rolling bodies influences the characteristic frequency of the torsional vibration damper and for this reason is so selected that the desired characteristic frequency will result. The rolling bodies (32) furthermore contribute substantially to prevent radial vibrations and tumbling of the flywheel (18).
Inventors
- 👤 Werner Wahling
- 👤 Gunther Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:38
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/56; F16D3/58; F16F; F16F15/00; F16F15/10; F16F15/14; F16F15/1407; F16F15/1414; F16F15/1435; F16F15/1442; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121; Y10T74/2131
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
170 words
A torsional vibrator damper comprising: a support which includes fastening means for mounting said support to a shaft flange or the like, a flywheel postitioned coaxially around said support and radially spaced therefrom, and a plurality of elastomeric spring elements disposed between said support and said flywheel and circumferentially spaced apart from each other, each of said spring elements being connected to an outer surface of said support and an inner surface of said flywheel, each of said spring elements including a cavity therein formed of a pair of opposed, rolling curves of elastomeric material and having a rigid rolling body within said cavity and in contact with said rolling curves and supported therein under radial bias, with said rolling curves converging in a circumferential direction at both sides of an associated rolling body and being formed by a layer of the elastomeric material which becomes progressively thicker in circumferential direction toward both sides of said rolling element, with said rolling curves terminating at each end in a T-shaped slot.
Claim 2
Dependent Claim
170 words
A torsional vibrator damper comprising: a support which includes fastening means for mounting said support to a shaft flange or the like, a flywheel postitioned coaxially around said support and radially spaced therefrom, and a plurality of elastomeric spring elements disposed between said support and said flywheel and circumferentially spaced apart from each other, each of said spring elements being connected to an outer surface of said support and an inner surface of said flywheel, each of said spring elements including a cavity therein formed of a pair of opposed, rolling curves of elastomeric material and having a rigid rolling body within said cavity and in contact with said rolling curves and supported therein under radial bias, with said rolling curves converging in a circumferential direction at both sides of an associated rolling body and being formed by a layer of the elastomeric material which becomes progressively thicker in circumferential direction toward both sides of said rolling element, with said rolling curves terminating at each end in a T-shaped slot.
Claim 3
Dependent Claim
30 words
The torsional vibration damper as set forth in claim 1 wherein each rolling body is a roller arranged with its axis parallel to the axis of said support and flywheel.
Claim 4
Dependent Claim
28 words
The torsional vibration damper as set forth in claim 2 wherein the inner surface of said flywheel in the area of the spring elements is of cylindrical configuration.
Claim 5
Dependent Claim
28 words
The torsional vibration damper as set forth in claim 2 wherein the outer surface of said support in the area of the spring elements is of cylindrical configuration.
Claim 6
Dependent Claim
34 words
The torsional vibration damper as set forth in claim 2 wherein said support includes a plurality of collars having a cylindrical outer surface and with a spring element mounted to each of said collars.
Claim 7
Dependent Claim
44 words
The torsional vibration damper as set forth in claim 2 wherein said rollers are provided in the shape of a diabolo with a central construction and wherein each spring element has one or more webs which extend into said cavity and engage said constriction.
Claim 8
Dependent Claim
20 words
The torsional vibration damper as set forth in claim 6 wherein each web converges more strongly than the rolling curves.
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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) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |