US4861006A — Anti-vibration apparatus

Claim 1

Independent Claim 136 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 electric main body containing electrorheologic fluid; a partitioning portion partitioning said liquid chamber into a plurality of small liquid chambers; an elongated long orifice opening into said small liquid chambers and communicating with said small liquid chambers thereby allowing flow of said electrorheologic fluid; and electrode means disposed within said elongated orifice to directly contact said electrorheologic fluid for varying the viscosity of said electrorheologic fluid within said elongated orifice, the viscosity of said electrorheologic fluid being varied in proportion to the strength of an electric field of said electrode means to thereby absorb a wide range of engine vibrations when a current is passed through said electrode means.

Claim 2

Dependent Claim 136 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 electric main body containing electrorheologic fluid; a partitioning portion partitioning said liquid chamber into a plurality of small liquid chambers; an elongated long orifice opening into said small liquid chambers and communicating with said small liquid chambers thereby allowing flow of said electrorheologic fluid; and electrode means disposed within said elongated orifice to directly contact said electrorheologic fluid for varying the viscosity of said electrorheologic fluid within said elongated orifice, the viscosity of said electrorheologic fluid being varied in proportion to the strength of an electric field of said electrode means to thereby absorb a wide range of engine vibrations when a current is passed through said electrode means.

Claim 3

Dependent Claim 17 words

An anti-vibration apparatus according to claim 1, wherein said elongated orifice is provided in said partitioning portion.

Claim 4

Dependent Claim 19 words

An anti-vibration apparatus according to claim 2, wherein said elongated orifice comprises a passage having a substantially curved configuration.

Claim 5

Dependent Claim 25 words

An anti-vibration apparatus according to claim 3, wherein said partitioning portion comprises a partition wall with a protruding portion formed at a substantially central portion.

Claim 6

Dependent Claim 21 words

An anti vibration apparatus according to claim 4, wherein said passage is formed along the side wall of said protruding portion.

Claim 7

Dependent Claim 30 words

An anti-vibration apparatus according to claim 5, wherein said electrode means comprises a pair of electrode plates disposed along said passage in such a manner that they face each other.

Claim 8

Dependent Claim 39 words

An anti-vibration apparatus according to claim 6, wherein a top portion of said protruding portion has an opening, within which a movable plate is mounted in such a manner that it can be minutely vibrated in the vertical direction.

Claim 9

Dependent Claim 45 words

An anti-vibration apparatus according to claim 6, wherein a top portion of said protruding portion has an opening, within which a plate with a plurality of small through-holes formed therein is mounted between elastic membranes in such a manner that it can be minutely vibrated.

Claim 10

Dependent Claim 53 words

An anti-vibration apparatus according to claim 1, wherein the number of said plurality of small liquid chambers is two, and one of said small liquid chambers accommodates a separating plate for dividing said one of said small liquid chambers into two parts, a substantially central portion of said separating plate having an opening.

Claim 11

Dependent Claim 31 words

An anti-vibration apparatus according to claim 6, wherein said protruding portion accommodates at least a pair of coaxial electrode plates, and a top portion of said protruding portion has an opening.

Claim 12

Dependent Claim 51 words

An anti-vibration apparatus according to claim 1, further including: a first mounting portion to be fixed to said vibration generating section, a second mounting portion to be fixed to said vibration receiving section, and an elastic body disposed between said liquid chamber and either of said first and second mounting portions.

Claim 13

Dependent Claim 43 words

An anti-vibration apparatus according to claim 1, further including: a first mounting portion to be fixed to said vibration generating section, and a second mounting portion to be fixed to said vibration receiving section, said first mounting portion passing through said liquid chamber.

Claim 14

Dependent Claim 215 words

An anti-vibration apparatus comprising: a substantially column-shaped liquid chamber partially formed by an elastic main body, said liquid chamber being made to be expandable by the expansion of said elastic main body; electrorheologic fluid contained in said liquid chamber and having a viscosity which changes when a current is passed therethrough; a partition wall portion disposed within said liquid chamber substantially perpendicular to the axis of said liquid chamber, said partition wall portion partitioning said liquid chamber into two small liquid chambers; an elongated long orifice provided in said partition wall portion and formed into a substantially curved configuration about the axis of said liquid chamber, said elongated orifice opening into said small liquid chambers, and communicating with said small liquid chambers thereby allowing flow of said electrorheologic fluid; and a pair of electrode plates disposed within said elongated orifice and along the wall portion of said elongated orifice to directly contact said electrorheologic fluid in such a manner that they face each other, for varying the viscosity of said electrorheologic fluid within said elongated orifice, the viscosity of said electrorheologic fluid being varied in proportion to the strength of an electric field of said electrode plates to thereby absorb a wide range of engine vibrations when a current is passed through said electrode plates.

Claim 15

Dependent Claim 215 words

An anti-vibration apparatus comprising: a substantially column-shaped liquid chamber partially formed by an elastic main body, said liquid chamber being made to be expandable by the expansion of said elastic main body; electrorheologic fluid contained in said liquid chamber and having a viscosity which changes when a current is passed therethrough; a partition wall portion disposed within said liquid chamber substantially perpendicular to the axis of said liquid chamber, said partition wall portion partitioning said liquid chamber into two small liquid chambers; an elongated long orifice provided in said partition wall portion and formed into a substantially curved configuration about the axis of said liquid chamber, said elongated orifice opening into said small liquid chambers, and communicating with said small liquid chambers thereby allowing flow of said electrorheologic fluid; and a pair of electrode plates disposed within said elongated orifice and along the wall portion of said elongated orifice to directly contact said electrorheologic fluid in such a manner that they face each other, for varying the viscosity of said electrorheologic fluid within said elongated orifice, the viscosity of said electrorheologic fluid being varied in proportion to the strength of an electric field of said electrode plates to thereby absorb a wide range of engine vibrations when a current is passed through said electrode plates.

Claim 16

Dependent Claim 22 words

An anti-vibration apparatus according to claim 13, wherein said partition wall portion comprises a protruding portion formed at a substantially central portion.

Claim 17

Dependent Claim 47 words

An anti-vibration apparatus according to claim 14, wherein a top portion of said protruding portion has an opening which communicates said two small liquid chambers, and within which a movable plate is mounted in such a manner that it can be minutely vibrated in the vertical direction.

Claim 18

Dependent Claim 51 words

An anti-vibration apparatus according to claim 14, wherein a top portion of said protruding portion has an opening which communicates said two small liquid chambers, and within which a plate having a plurality of small through-holes is mounted between elastic membranes in such a manner that it can be minutely vibrated.

Claim 19

Dependent Claim 55 words

An anti-vibration apparatus according to claim 13, wherein one of said small liquid chambers accommodates a separating plate which separates said one of said small liquid chambers into two parts, the substantially central portion of said separating plate having an opening. into two parts, a substantially central portion of said separating plate having an opening.

Claim 20

Dependent Claim 37 words

An anti-vibration apparatus according to claim 13, wherein said protruding portion accommodates at least a pair of coaxial electrode plates, and a top portion of said protruding portion has an opening which communicates said small liquid chambers.

Claim 21

Dependent Claim 51 words

An anti-vibration apparatus according to claim 13, further including: a first mounting portion to be fixed to said vibration generating section, a second mounting portion to be fixed to said vibration receiving section, and an elastic body disposed between said liquid chamber and either of said first and second mounting portions.

Claim 22

Dependent Claim 43 words

An anti-vibration apparatus according to claim 13, further including: a first mounting portion to be fixed to said vibration generating section, and a second mounting portion to be fixed to said vibration receiving section, said first mounting portion passing through said liquid chamber.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-08-28	1993-02-27	1993-08-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-08-28	1997-02-27	1997-08-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-08-28	2001-02-27	2001-08-29	$7700.00	Window Closed / Lapsed

Anti-vibration apparatus

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