EP0414508A1 — Vibration damping device

Claim 1

Independent Claim 122 words

A vibration damping device comprising two cylindical and flexible membrane members (1, 2), and end portion of eaoh of said membrane members being connected to respective end portions of a member(s) constituting a restricted passage and another end portion of each of said membrane members being connected to each of respective face plates (4, 5) so as to form a closed chamber such that folded portions of both cylindical and flexible membrane members face each other; a rigid member (7) connecting the two face plates to each other inside or outside the closed chamber; a fluid (8) filled in the closed chamber; and a fastening member (11, 12) disposed at each side of the restricted passage constituting member and the face plate.

Claim 2

Dependent Claim 122 words

A vibration damping device comprising two cylindical and flexible membrane members (1, 2), and end portion of eaoh of said membrane members being connected to respective end portions of a member(s) constituting a restricted passage and another end portion of each of said membrane members being connected to each of respective face plates (4, 5) so as to form a closed chamber such that folded portions of both cylindical and flexible membrane members face each other; a rigid member (7) connecting the two face plates to each other inside or outside the closed chamber; a fluid (8) filled in the closed chamber; and a fastening member (11, 12) disposed at each side of the restricted passage constituting member and the face plate.

Claim 3

Dependent Claim 66 words

A vibration damping device according to claim 1 characterized in that the rigid member (7) connecting the two face plates to each other is disposed in the closed chamber so as to pass through the restricted passage constituting member (3) and a slide guide (13) for guiding the sliding of the rigid member in the axial direction thereof is arranged in the restricted passage constituting member.

Claim 4

Dependent Claim 117 words

A vibration damping device comprising two cylindrical and flexible members (1,2), an end portion of each of said membrane members being liquid-tightly connected to respective end portions of a member (3) constituting a restrioted passage and another end portion of each of said membrane members being liquid-tightly connected to each of respective face plates (4,5) so as to form a closed chamber; a rigid member (7) connecting the two face plates to each other inside or outside the closed chamber; electrodes arranged on the restricted passage constituting member in the closed chamber and coontacting with the electrorheological fluid; and a fastening member (11,12) disposed at each side of the restricted passage constituting member and the face plate.

Claim 5

Dependent Claim 117 words

A vibration damping device comprising two cylindrical and flexible members (1,2), an end portion of each of said membrane members being liquid-tightly connected to respective end portions of a member (3) constituting a restrioted passage and another end portion of each of said membrane members being liquid-tightly connected to each of respective face plates (4,5) so as to form a closed chamber; a rigid member (7) connecting the two face plates to each other inside or outside the closed chamber; electrodes arranged on the restricted passage constituting member in the closed chamber and coontacting with the electrorheological fluid; and a fastening member (11,12) disposed at each side of the restricted passage constituting member and the face plate.

Claim 6

Dependent Claim 126 words

A vibration damping device comprising a cylinder provided at each end with an end plate, an intermediate plate disposed in the cylinder to define a closed chamber with one of the end plates, an electrorheological fluid filled in the closed chamber, a piston unitied with a rod passing through the closed chamber and dividing the closed chamber into two chambers, at least one restricted passage communicating these divided chambers with each other, electrodes disposed on the restricted passage and contacting with the electrorheological fluid, an elastic stopper attached to an end portion of the rod outside the closed chamber in the cylinder and impinging with the other end plate or the intermediate plate, and a fastening member disposed at each of cylinder side and rod side.

Claim 7

Dependent Claim 126 words

A vibration damping device comprising a cylinder provided at each end with an end plate, an intermediate plate disposed in the cylinder to define a closed chamber with one of the end plates, an electrorheological fluid filled in the closed chamber, a piston unitied with a rod passing through the closed chamber and dividing the closed chamber into two chambers, at least one restricted passage communicating these divided chambers with each other, electrodes disposed on the restricted passage and contacting with the electrorheological fluid, an elastic stopper attached to an end portion of the rod outside the closed chamber in the cylinder and impinging with the other end plate or the intermediate plate, and a fastening member disposed at each of cylinder side and rod side.

Vibration damping device

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