US4973031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-vibration apparatus
Assignee: Bridgestone Corp
•
Filing: 1989-06-14
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Granted: 1990-11-27
•
Expires: 2009-06-14
Abstract
Abstract An anti-vibration apparatus includes an expandable liquid-chamber, an electrorheologic fluid contained in the liquid chamber, a partition wall for sepatating the liquid chamber into a plurality of small liquid chambers, and an orifice communicating the small liquid chambers. The orifice comprises an elongated orifice, within which electrodes are disposed to pass a current through the electrorheologic fluid. Therefore, the viscosity of the electrorheologic fluid contained in the orifice can be changed, so as to adjust the resitance to the flow through the orifice of the fluid.
Inventors
- 👤 Kazuya Takano
- 👤 Takeshi Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:14
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/26; F16F13/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
144 words
An anti-vibration apparatus comprising: an expandable liquid chamber interposed between a vibration generating section and a vibration receiving section, said liquid chamber being partially formed by an elastic main body and containing electrorheologic fluid; a partitioning portion for partitioning said liquid chamber into a plurality of small liquid chambers; a first elongated long orifice located within said expandable liquid chamber and opening into said small liquid chambers, said first orifice providing communication between said small liquid chambers thereby allowing flow of said electrorheologic fluid; at least one second orifice located within said expandable liquid chamber and mutually communicating with said small liquid chambers communicated by said first elongated long orifice, thereby allowing flow of said electrorheologic fluid; and electrode means disposed within said second orifice for varying the viscosity of said electrorheologic fluid within said second orifice for controlling flow of said electrorheologic fluid.
Claim 2
Dependent Claim
144 words
An anti-vibration apparatus comprising: an expandable liquid chamber interposed between a vibration generating section and a vibration receiving section, said liquid chamber being partially formed by an elastic main body and containing electrorheologic fluid; a partitioning portion for partitioning said liquid chamber into a plurality of small liquid chambers; a first elongated long orifice located within said expandable liquid chamber and opening into said small liquid chambers, said first orifice providing communication between said small liquid chambers thereby allowing flow of said electrorheologic fluid; at least one second orifice located within said expandable liquid chamber and mutually communicating with said small liquid chambers communicated by said first elongated long orifice, thereby allowing flow of said electrorheologic fluid; and electrode means disposed within said second orifice for varying the viscosity of said electrorheologic fluid within said second orifice for controlling flow of said electrorheologic fluid.
Claim 3
Dependent Claim
19 words
An anti-vibration apparatus according to claim 1, further comprising means for controlling alternating voltage applied to said electrode means.
Claim 4
Dependent Claim
26 words
An anti-vibration apparatus according to claim 1, wherein said partitioning portion comprises a partitioning wall with a protruding portion formed at a substantially central portion thereof.
Claim 5
Dependent Claim
20 words
An anti-vibration apparatus according to claim 3, wherein top and bottom portions of said partitioning wall each include a recess.
Claim 6
Dependent Claim
33 words
An anti-vibration apparatus according to claim 3, wherein said first elongated long orifice is provided in said partitioning portion and formed into a substantially curved shape about the axis of said partitioning portion.
Claim 7
Dependent Claim
22 words
An anti-vibration apparatus according to claim 5, wherein said first elongated long orifice is formed along a wall of said partitioning portion.
Claim 8
Dependent Claim
24 words
An anti-vibration apparatus according to claim 4, wherein said second orifice is provided separately from said first elongated long orifice in said partitioning portion.
Claim 9
Dependent Claim
17 words
An anti-vibration apparatus according to claim 7, wherein said second orifice comprises a pair of semicircular orifices.
Claim 10
Dependent Claim
24 words
An anti-vibration apparatus according to claim 8, wherein said electrode means comprises at least one pair of electrode plates disposed along said semicircular orifices.
Claim 11
Dependent Claim
137 words
An anti-vibration apparatus comprising: a first expandable liquid chamber interposed between a vibration generating section and a vibration receiving section, said liquid chamber being partially formed by an elastic main body; a partitioning portion for partitioning said liquid chamber into a plurality of small liquid chambers; a first elongated long orifice opening into said small liquid chambers and communicating with said small liquid chambers; a second chamber comprising: a first recess provided in a top portion of said partitioning portion; a second recess provided in a bottom portion of said partitioning portion; at least one second orifice provided in said partitioning portion for communicating with both said recesses; flexible members disposed on said partitioning portion to enclose both said recesses; electrode means disposed within walls of said second orifice; and electrorheologic fluid contained in said second chamber.
Claim 12
Dependent Claim
137 words
An anti-vibration apparatus comprising: a first expandable liquid chamber interposed between a vibration generating section and a vibration receiving section, said liquid chamber being partially formed by an elastic main body; a partitioning portion for partitioning said liquid chamber into a plurality of small liquid chambers; a first elongated long orifice opening into said small liquid chambers and communicating with said small liquid chambers; a second chamber comprising: a first recess provided in a top portion of said partitioning portion; a second recess provided in a bottom portion of said partitioning portion; at least one second orifice provided in said partitioning portion for communicating with both said recesses; flexible members disposed on said partitioning portion to enclose both said recesses; electrode means disposed within walls of said second orifice; and electrorheologic fluid contained in said second chamber.
Claim 13
Dependent Claim
19 words
An anti-vibration apparatus according to claim 10, further comprising means for controlling alternating voltage applied to said electrode means.
Claim 14
Dependent Claim
21 words
An anti-vibration apparatus according to claim 10, wherein a partition wall is provided between said first recess and said second recess.
Claim 15
Dependent Claim
20 words
An anti-vibration apparatus according to claim 10, wherein said second orifice comprises a plurality of passages having substantially curved configurations.
Claim 16
Dependent Claim
19 words
An anti-vibration apparatus according to claim 10, wherein said electrode means comprises at least one pair of electrode plates.
References Cited (Backward Citations)
US1114284A
Cited
US1800434A
Cited
US2540130A
Cited
US2539443A
Cited
US2582998A
Cited
US2502322A
Cited
US2886151A
Cited
GB756107A
Cited
US3047507A
Cited
US3159388A
Cited
US3361216A
Cited
SU578510A1
Cited
JPS52131072A
Cited
JPS53117704A
Cited
US4288063A
Cited
GB2041485A
Cited
EP0027751A1
Cited
JPS5666539A
Cited
US4383679A
Cited
EP0040290A2
Cited
US4424960A
Cited
US4535976A
Cited
US4399987A
Cited
JPS5776340A
Cited
JPS57184344A
Cited
JPS57129944A
Cited
US4568069A
Cited
JPS5837337A
Cited
US4505462A
Cited
EP0088682A1
Cited
US4511126A
Cited
DE3210731A1
Cited
JPS58203242A
Cited
US4460168A
Cited
JPS5947541A
Cited
JPS5965635A
Cited
JPS5997334A
Cited
GB2132312A
Cited
JPS59117930A
Cited
DE3340153A1
Cited
US4610421A
Cited
US4595183A
Cited
US4583723A
Cited
DE3423698A1
Cited
EP0133588A2
Cited
JPS60104828A
Cited
JPS60113835A
Cited
EP0147242A2
Cited
US4630808A
Cited
JPS60179542A
Cited
JPS60201136A
Cited
US4630806A
Cited
US4635910A
Cited
JPS612936A
Cited
JPS6155427A
Cited
US4660812A
Cited
JPS6174930A
Cited
JPS61130639A
Cited
JPS61159034A
Cited
US4640170A
Cited
DE3519016A1
Cited
US4706947A
Cited
EP0209145A2
Cited
JPS6231738A
Cited
JPS6246041A
Cited
US4664363A
Cited
US4687188A
Cited
US4720087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |