An antivibration device is equipped with an inner sleeve having a diameter expansion portion, an outer sleeve, an antivibration base body, and an annular stopper. The stopper is equipped with a first portion where a first distance from the center of the attaching hole to an inner peripheral surface of the attaching hole is set to be smaller than a maximum value of an outer radius of the diameter expansion portion, and a second portion where a second distance from the center to the inner peripheral surface of the attaching hole is set to be larger than the first distance.

A vibration damping device including: a first attachment member and a second attachment member disposed apart from each other; and a main rubber elastic body connecting the first attachment member and the second attachment member, the main rubber elastic body being of a frustoconical-like shape having an outer peripheral surface whose diameter gradually increases from the first attachment member toward the second attachment member, the main rubber elastic body including a recess opening onto a center portion thereof on a large-diameter side that is a second attachment member side, and the main rubber elastic body that constitutes a bottom part of the recess integrally including a vibration-damping protrusion protruding into the recess.

Disclosed is a panel that is produced by assembling a plurality of adjacent individual absorption blocks; each block in the panel is in the shape of a polyhedral pyramid frustum, of which the base is a regular six-sided polygon; each individual block including six lateral walls surrounded by a lower peripheral lip of which each section is provided with a complementary tenon or a mortise arranged so as to allow two adjacent individual blocks to be assembled, in particular by engagement, in the vertical direction, of a tenon and a mortise belonging respectively to one and the other of the two adjacent individual blocks.

A damper apparatus includes a first rotating body, a second rotating body, and an elastic mechanism unit including an elastic body and paired seat members. The seat member includes a first surface portion coming into contact with one of the first rotating body and the second rotating body and a second surface portion coming into contact with another of the first rotating body and the second rotating body, a first angle ?1 formed by a first tangent line at a first point of contact, the first tangent line including a first vector and a second vector, and the first vector is 11.5???1?22.0?, and a second angle ?2 formed by a second tangent line at a second point of contact, the second tangent line including a third vector and a fourth vector, and the third vector is 11.5???2?22.0?.

A spring element for a vehicle shock absorber. The spring element includes a longitudinal axis and a basic body that extends along the longitudinal axis and is deformable resiliently between an uncompressed basic state and a state compressed in the direction of a longitudinal axis, and which includes an end side with a stop surface configured for contact against a damper cap of the vehicle shock absorber. The stop surface is at least partially structured. A passenger motor vehicle car can include such a spring element.

A system for damping vibrations has a damping device which has a fastening anchor configured to be fixed to a component. The anchor has a rod-shaped insertion element and an axial securing element projecting radially from the insertion element. The damping device has an elastic all-metal cushion having an opening dimensioned, in the unexpanded state, such that the axial securing element is not insertable through it. Part of the system is also an installation aid configured to be releasably fastened to the anchor. The installation aid is shaped in such a manner that, when it is fastened to the anchor and the cushion is pushed over the installation aid, said installation aid expands the opening of the cushion in the radial direction to such an extent that the opening of the cushion passes the axial securing element during pushing on, and the cushion latches behind the axial securing element.

An internal viscous rotational damping (VRD) assembly for transmitting torque from a drive member connector to a load member connector is provided. The VRD assembly comprises a spacer tube connected between the drive member connector and the load member connector, wherein the spacer tube includes a longitudinal axis and an inner surface that extends along the longitudinal axis. The VRD assembly further includes a damper bar disposed within the spacer tube. The damper bar includes an outer surface, wherein a cavity is defined between the outer surface of the damper bar and the inner surface of the spacer tube, and wherein the cavity is configured for receiving a viscous fluid.

Damper includes a housing having proximal and distal ends, a first attachment point proximate the distal end of the housing, a rod having proximal and distal ends at least partially disposed within the housing and moveable relative to the housing between an extended position and a compressed position, a second attachment point proximate the proximal end of the rod, a piston joined to the rod within the housing proximate the distal end of the rod, the piston including a bypass groove having a flow area defined therein to allow fluid to flow from a first side of the piston to an opposing side of the piston, and a first washer disposed proximate a first end of the piston and at least partially covering the flow area of the bypass groove.

Provided is an anti-vibration device (1) including: a first anti-vibration rubber cylinder (11) that connects a vibration generating portion and a vibration receiving portion in a first direction; a second anti-vibration rubber cylinder (12) that sandwiches one of the vibration generating portion and the vibration receiving portion in the first direction between the first anti-vibration rubber cylinder (11) and itself; and a support member (13) that sandwiches the second anti-vibration rubber cylinder (12) in the first direction between the one of the portions and itself, wherein the first anti-vibration rubber cylinder (11) and the second anti-vibration rubber cylinder (12) are provided with respective central axes (O) thereof extending in the first direction, and peripheral grooves (15) are formed separately on an outer peripheral surface and an inner peripheral surface of at least one of the first anti-vibration rubber cylinder (11) and the second anti-vibration rubber cylinder (12).

An exemplary shock absorber includes a damper tube, a damper piston, a piston shaft, and at least two different surface treatments. The damper tube includes an interior surface. The damper piston includes a piston surface that engages the interior surface. The piston shaft couples with the damper piston and includes a shaft surface that engages a fourth surface. The at least two different surface treatments are disposed on at least one of the interior surface and the shaft surface and create a corresponding plurality of coefficients of friction with at least one of the piston surface and the fourth surface respectively.