Patent US3823619A successfully refreshed from Google Patents.
US3823619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-plate vibration damper
Assignee: Caterpillar Inc
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Filing: 1972-10-27
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Granted: 1974-07-16
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Expires: 1992-10-27
Abstract
Abstract A vibration damper comprises a housing having an annular weight secured between radially disposed side plates. An outer set of annular, cup-shaped shear inducing members comprise outer flanges secured between the weight and the side plates and inner shear discs projecting radially inwardly into an annular chamber formed in the housing. An inner set of similar shear inducing members have their inner flanges secured to a centrally disposed plate, attached to the housing, and their outer shear discs interleaved with the inner shear discs of the outer set of shear inducing members to provide clearances therebetween. The housing is at least partially filled with a damping fluid, such as a highly viscous silicone fluid, which enters the clearances during damper operation.
Inventors
- 👤 D Shotwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:30
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/16; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121; Y10T74/2122; Y10T74/2125
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
215 words
A vibration damper disposed on a rotational axis thereof comprising a housing defining a closed, annular chamber adapted to contain a damping fluid therein, a first set of annular, cup-shaped shear inducing members each comprising an outer flange extending radially outwardly from said axis and secured to said housing, an inner shear disc extending radially inwardly towards said axis and into said chamber and an outer hub extending axially in the direction of said axis connecting said outer flange and said inner shear disc together in axially spaced, offset relationship relative to each other, each of said inner shear discs being axially spaced relative to the next adjacent inner shear disc, and a second set of annular, cup-shaped shear inducing members each comprising an inner flange extending radially inwardly towards each axis, an outer shear disc extending radially outwardly away from said axis and into said chamber and an inner hub extending axially in the direction of said axis connecting said inner flange and said outer shear disc together in axially offset relationship relative to each other, the inner shear discs of said first set of shear inducing members being interleaved and axially spaced with respect to the outer shear discs of said second set of shear inducing members to define sheaR inducing clearances therebetween.
Claim 2
Dependent Claim
215 words
A vibration damper disposed on a rotational axis thereof comprising a housing defining a closed, annular chamber adapted to contain a damping fluid therein, a first set of annular, cup-shaped shear inducing members each comprising an outer flange extending radially outwardly from said axis and secured to said housing, an inner shear disc extending radially inwardly towards said axis and into said chamber and an outer hub extending axially in the direction of said axis connecting said outer flange and said inner shear disc together in axially spaced, offset relationship relative to each other, each of said inner shear discs being axially spaced relative to the next adjacent inner shear disc, and a second set of annular, cup-shaped shear inducing members each comprising an inner flange extending radially inwardly towards each axis, an outer shear disc extending radially outwardly away from said axis and into said chamber and an inner hub extending axially in the direction of said axis connecting said inner flange and said outer shear disc together in axially offset relationship relative to each other, the inner shear discs of said first set of shear inducing members being interleaved and axially spaced with respect to the outer shear discs of said second set of shear inducing members to define sheaR inducing clearances therebetween.
Claim 3
Dependent Claim
23 words
The damper of claim 1 wherein said housing comprises an annular weight and an annular side plate having said outer flanges secured therebetween.
Claim 4
Dependent Claim
26 words
The damper of claim 2 wherein said housing further comprises a support member and an elastomeric seal secured between said support member and said side plate.
Claim 5
Dependent Claim
51 words
The damper of claim 3 further comprising a disc-shaped support, adapted for attachment to the crankshaft of an internal combustion engine, extending radially outwardly from said axis and into said chamber, said support member and the inner flanges of said second set of shear inducing members secured to said support plate.
Claim 6
Dependent Claim
31 words
The damper of claim 4 further comprising third and fourth sets of said annular, cup-shaped shear inducing members spaced axially from said first and second sets of shear inducing members, respectively.
Claim 7
Dependent Claim
97 words
In a vibration damper, disposed on a rotational axis thereof, having a housing defining a closed, annular chamber adapted to contain a damping fluid therein and a plurality of interleaved shear inducing members, the invention wherein said shear inducing members are each cup-shaped to comprise a radially extending flange secured to said housing, a radially extending shear disc projecting into the chamber of said housing and interleaved with respect to other ones of said shear discs, and an axially extending hub connecting said flange and shear disc together in axially spaced, offset relationship relative to each other.
Claim 8
Dependent Claim
97 words
In a vibration damper, disposed on a rotational axis thereof, having a housing defining a closed, annular chamber adapted to contain a damping fluid therein and a plurality of interleaved shear inducing members, the invention wherein said shear inducing members are each cup-shaped to comprise a radially extending flange secured to said housing, a radially extending shear disc projecting into the chamber of said housing and interleaved with respect to other ones of said shear discs, and an axially extending hub connecting said flange and shear disc together in axially spaced, offset relationship relative to each other.
Claim 9
Dependent Claim
124 words
A vibration damper defining an annular chamber therein and disposed on a rotational axis thereof comprising an annular weight, a pair of annular side plates disposed on each axial side of said weight, axially spaced outer sets of shear inducing members having outer peripheral flanges thereof secured between said weight and respective ones of said side plates and inner shear discs extending radially inwardly towards said axis and into said chamber, inner sets of shear inducing members having outer shear discs extending radially outwardly away from said axis and into said chamber in interleaved and axially spaced relationship relative to said inner shear discs to define shear inducing clearances therebetween and means attaching said inner sets of shear inducing members to said side plates.
Claim 10
Dependent Claim
124 words
A vibration damper defining an annular chamber therein and disposed on a rotational axis thereof comprising an annular weight, a pair of annular side plates disposed on each axial side of said weight, axially spaced outer sets of shear inducing members having outer peripheral flanges thereof secured between said weight and respective ones of said side plates and inner shear discs extending radially inwardly towards said axis and into said chamber, inner sets of shear inducing members having outer shear discs extending radially outwardly away from said axis and into said chamber in interleaved and axially spaced relationship relative to said inner shear discs to define shear inducing clearances therebetween and means attaching said inner sets of shear inducing members to said side plates.
Claim 11
Dependent Claim
33 words
The damper of claim 7 wherein said means comprises a pair of support members and an elastomeric seal secured between each of said support members and a respective one of said side plates.
Claim 12
Dependent Claim
52 words
The damper of claim 8 wherein said means further comprises a disc-shaped support, adapted for attachment to the crankshaft of an internal combustion engine, extending radially outwardly from said axis and into said chamber, and wherein said inner sets of shear inducing members further comprise inner flanges secured to said disc-shaped support.
Claim 13
Dependent Claim
18 words
The damper of claim 9 wherein said support members are secured to opposite sides of said disc-shaped support.
Claim 14
Dependent Claim
28 words
The damper of claim 9 wherein two sets of each of said outer and inner shear inducing members are positioned axially on opposite sides of said disc-shaped support.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |