US3826340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration damper for slender vertical structures
Assignee: Individual
•
Filing: 1973-09-19
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Granted: 1974-07-30
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Expires: 1993-09-19
Abstract
Abstract A damper for detuning a vertical slender structure such as a monopole antenna, subject to wind induced vibrations, the damper having a ''''mushroom'''' shaped configuration with a cap mounted on one end of a flexible stem, the other end of the stem secured to the top of the structure enabling the cap to oscillate out-ofphase with the vibrating structure.
Inventors
- 👤 H Brokaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:18
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/14; F; F16; F16F; F16F7/00; F16F7/10; F16F7/104; F16F7/108; Y; Y10; Y10S; Y10S343/00; Y10S343/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
The combination of a slender, vertically base-supported structure subject to vibration and a damper for cancelling said vibration comprising: a damper mass; a vertical central stem member connected to said damper mass and supporting said damper mass to and in spaced relation on the top of said vertical base-supported structure; means securing said stem to the structure; said stem being flexible and having a narrow cross-sectional dimension as compared to said damper mass forming a mushroomlike configuration; whereby said damper mass is capable of oscillating in a rocking motion to lag the vibration and detune the structure.
Claim 2
Dependent Claim
97 words
The combination of a slender, vertically base-supported structure subject to vibration and a damper for cancelling said vibration comprising: a damper mass; a vertical central stem member connected to said damper mass and supporting said damper mass to and in spaced relation on the top of said vertical base-supported structure; means securing said stem to the structure; said stem being flexible and having a narrow cross-sectional dimension as compared to said damper mass forming a mushroomlike configuration; whereby said damper mass is capable of oscillating in a rocking motion to lag the vibration and detune the structure.
Claim 3
Dependent Claim
107 words
The combination of a monopole antenna and a mushroom-shaped damper for cancelling the vibration to which the antenna is subjected, said damper comprising: a plate-like damper cap having a symmetrical and uniform cross-sectional configuration; a central vertical stem of resilient material supporting said cap to and in spaced relation to the top of said antenna; means securing said stem to the antenna; said cap and stem being fabricated of non-metallic material; the cross-sectional area of the stem being a minor portion of the cross-sectional area of the cap; wheReby said cap is capable of oscillating in a rocking motion to lag the vibration and detune the antenna.
Claim 4
Dependent Claim
107 words
The combination of a monopole antenna and a mushroom-shaped damper for cancelling the vibration to which the antenna is subjected, said damper comprising: a plate-like damper cap having a symmetrical and uniform cross-sectional configuration; a central vertical stem of resilient material supporting said cap to and in spaced relation to the top of said antenna; means securing said stem to the antenna; said cap and stem being fabricated of non-metallic material; the cross-sectional area of the stem being a minor portion of the cross-sectional area of the cap; wheReby said cap is capable of oscillating in a rocking motion to lag the vibration and detune the antenna.
Claim 5
Dependent Claim
105 words
The combination of a slender, vertical base-supported structure subjected to vibration and a damper for cancelling said vibration comprising: a damper mass; a vertical central stem member connected to said damper mass and supporting said damper mass to and in spaced relation on the top of said vertical base-supported structure; said stem being flexible and having a narrow cross-sectional dimension as compared to said damper mass; said stem being tubular, and said damper mass having a projection fitting into the tubular end of the stem; whereby said damper mass is capable of oscillating in a rocking motion to lag the vibration and detune the structure.
Claim 6
Dependent Claim
105 words
The combination of a slender, vertical base-supported structure subjected to vibration and a damper for cancelling said vibration comprising: a damper mass; a vertical central stem member connected to said damper mass and supporting said damper mass to and in spaced relation on the top of said vertical base-supported structure; said stem being flexible and having a narrow cross-sectional dimension as compared to said damper mass; said stem being tubular, and said damper mass having a projection fitting into the tubular end of the stem; whereby said damper mass is capable of oscillating in a rocking motion to lag the vibration and detune the structure.
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |