US3780207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration damper
Assignee: Lacal Industries Ltd
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Filing: 1972-07-05
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Granted: 1973-12-18
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Expires: 1992-07-05
Abstract
Abstract This invention concerns a vibration damper for a suspended cable comprising a housing, means for clamping said housing to a suspended cable, said housing having a sealed chamber, an inertia member in said sealed chamber, resilient means in said sealed chamber compressible in the spacing between said sealed chamber wall and said inertia member and maintaining said inertia member spaced from the wall of said sealed chamber under static conditions, said resilient means being compressible as said housing member moves with respect to said inertia member under conditions of vibration of said housing, a viscous damping fluid in said sealed chamber, said viscous damping fluid having a viscosity to dampen vibration as it is displaced in said chamber by said inertia member under conditions of vibration.
Inventors
- 👤 Crosby N Wellington
- 👤 Walker R Clinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:35
CPC Classifications
H; H02; H02G; H02G7/00; H02G7/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
A vibration damper for a suspended cable comprising a housing, means for clamping said housing to a suspended cable, said housing having a sealed chamber, an inertia member in said sealed chamber, resilient means in said sealed chamber compressible in the spacing between said sealed chamber wall and said inertia member and maintaining said inertia member spaced from the wall of said sealed chamber under static conditions, said resilient means being compressible as said housing member moves with respect to said inertia member under conditions of vibration of said housing, a viscous damping fluid in said sealed chamber said viscous damping fluid having a viscosity to dampen vibration as it is displaced in said chamber by said inertia member under conditions of vibration.
Claim 2
Dependent Claim
123 words
A vibration damper for a suspended cable comprising a housing, means for clamping said housing to a suspended cable, said housing having a sealed chamber, an inertia member in said sealed chamber, resilient means in said sealed chamber compressible in the spacing between said sealed chamber wall and said inertia member and maintaining said inertia member spaced from the wall of said sealed chamber under static conditions, said resilient means being compressible as said housing member moves with respect to said inertia member under conditions of vibration of said housing, a viscous damping fluid in said sealed chamber said viscous damping fluid having a viscosity to dampen vibration as it is displaced in said chamber by said inertia member under conditions of vibration.
Claim 3
Dependent Claim
23 words
A vibration damper as claimed in claim 1, in which said sealed chamber is spherical and in which said inertia member is spherical.
Claim 4
Dependent Claim
19 words
A vibration damper as claimed in claim 1, in which said resilient means comprises a plurality of coil springs.
Claim 5
Dependent Claim
19 words
A vibration damper as claimed in claim 2, in which said resilient means comprises a plurality of coil springs.
Claim 6
Dependent Claim
30 words
A vibration damper as claimed in claim 2, in which said resilient means comprises a plurality of coil springs with their axes aligned with the centre of said inertia member.
Claim 7
Dependent Claim
78 words
A vibration damper as claimed in claim 1 in which said inertia member is formed with dashpots that open in directions of intended vibration of said housing, said dashpots having plungers therein, said resilient means being in said dashpots between the bottom of said dashpots and said plungers, said plungers being in contact with the wall of said sealed chamber, said viscous damping fluid being adapted to pass around said plungers of said dashpots under conditions of vibration.
Claim 8
Dependent Claim
23 words
A vibration damper as claimed in claim 6, in which said sealed chamber is spherical and in which said inertia member is spherical.
Claim 9
Dependent Claim
32 words
A vibration damper as claimed in claim 6, in which there are at least three pairs of diametrically opposed dashpots, each pair being on a mutually perpendicular axis to each other pair.
Claim 10
Dependent Claim
16 words
A vibration damper as claimed in claim 6, in which said plungers are spherical in shape.
Claim 11
Dependent Claim
16 words
A vibration damper as claimed in claim 7, in which said plungers are spherical in shape.
Claim 12
Dependent Claim
16 words
A vibration damper as claimed in claim 8, in which said plungers are spherical in shape.
Claim 13
Dependent Claim
18 words
A vibration damper as claimed in claim 7, in which said dashpots are tapered inwardly from their opening.
References Cited (Backward Citations)
US3614291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |