Patent US786473A successfully refreshed from Google Patents.
US5366048A
Expired / Lapsed
US
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Vibration damping device
Assignee: Bridgestone Corp
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Filing: 1994-04-12
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Granted: 1994-11-22
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Expires: 2014-04-12
Abstract
Abstract A vibration damping device comprises two cylindrical and flexible membrane members, a restricted passage constituting member connected at both end portions to these membrane members, two face plates connected at their end portion to the membrane members, a closed chamber defined by these members and face plates, a rigid member connecting both the face plates to each other at inside or outside of the closed chamber, a fluid filled in the closed chamber, and a fastening member disposed at each side of the restricted passage constituting member and the face plate.
Inventors
- 👤 Isao Watanabe
- 👤 Makoto Nakao
- 👤 Kiyoshi Ohno
- 👤 Masatoshi Ohishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:37
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/0472; F16F9/10; F16F9/103; F16F9/32; F16F9/53; F16F9/532; B; B60; B60G; B60G2202/00; B60G2202/20; B60G2202/24; B60G2500/00; B60G2500/10; B60G2500/104; B60G2600/00; B60G2600/22; B60G2600/26; F16F2230/00; F16F2230/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A vibration damping device comprising; two cylindrical rolling lobe type flexible membrane members each having an inwardly folded portion, two face plates each connected at an end to an end portion of each of the membrane members, a restricted passage constituting member connected at each end portion thereof to an opposite end portion of each of the membrane members to form a closed chamber in such a manner that the folded portions of both membrane members face each other for rolling movement on said restricted passage constituting member, a rigid member passing through the restricted passage constituting member and connecting both the face plates to each other and disposed inside the closed chamber, an electrorheological fluid filled in the closed chamber, electrodes arranged on the restricted passage constituting member in the closed chamber and contacting with the electrorheological fluid, and two fastening members disposed on sides of the restricted passage constituting member and the face plates.
Claim 2
Dependent Claim
156 words
A vibration damping device comprising; two cylindrical rolling lobe type flexible membrane members each having an inwardly folded portion, two face plates each connected at an end to an end portion of each of the membrane members, a restricted passage constituting member connected at each end portion thereof to an opposite end portion of each of the membrane members to form a closed chamber in such a manner that the folded portions of both membrane members face each other for rolling movement on said restricted passage constituting member, a rigid member passing through the restricted passage constituting member and connecting both the face plates to each other and disposed inside the closed chamber, an electrorheological fluid filled in the closed chamber, electrodes arranged on the restricted passage constituting member in the closed chamber and contacting with the electrorheological fluid, and two fastening members disposed on sides of the restricted passage constituting member and the face plates.
Claim 3
Dependent Claim
29 words
The vibration damping device according to claim 1, wherein said device further comprises an air spring arranged therearound and airtightly defined by an outer sleeve and a flexible sleeve.
Claim 4
Dependent Claim
33 words
The vibration damping device according to claim 1, wherein a slide guide for guiding the sliding of the rigid member in the axial direction thereof is arranged in the restricted passage constituting member.
References Cited (Backward Citations)
BE537348A
Cited
GB255872A
Cited
US1884477A
Cited
US2606631A
Cited
US3075601A
Cited
US2919883A
Cited
US3046003A
Cited
GB1282568A
Cited
FR2227461A1
Cited
JPS55112440A
Cited
SU1196558A1
Cited
US4854555A
Cited
DE3436664A1
Cited
JPS6081529A
Cited
US4572488A
Cited
FR2576994A1
Cited
GB2172081A
Cited
DE3731024A1
Cited
US4858733A
Cited
DE3742340A1
Cited
EP0298266A2
Cited
US4848495A
Cited
EP0382171A1
Cited
US5180145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-21 | 2006-05-23 | 2006-11-22 | $7700.00 | Window Closed / Lapsed |