A compressible bushing includes an end having a first outer diameter. The compressible bushing also includes a bumper section having a second outer diameter greater than or equal to the first outer diameter and may include of a compressible material. The compressible bushing also includes an opening passing through the end and the bumper section, the opening having an inner diameter.

The present invention provides a bearing pressure plate and a dynamo-electric machine using the bearing pressure plate which are capable of avoiding breakage of a bolt by dispersing a stress when a load due to vibrations etc. is applied. A bearing pressure plate 5 has an annular inner ring portion 11 abutting against an outer ring 3Ba of a rolling bearing 3 that supports a rotation shaft 4, an annular outer ring portion 12 located at a radial direction outer side of the inner ring portion 11 and having a plurality of bolt holes 12b through which the outer ring portion 12 is secured to a fixing portion side with a plurality of bolts 12a, and bridge portions 13 integrally connecting the inner ring portion 11 and the outer ring portion 12 at positions except the bolt holes 12b in a circumferential direction.

A shock absorber includes: a collar which is mounted on an outer circumference of a cylinder movable in the axial direction with respect to an inner tube in which a liquid is stored and supports one end of a suspension spring. The collar has: an annular mounting portion whose one end is supported by the cylinder; an annular sliding contact portion provided to be closer to the suspension spring than the mounting portion and in sliding contact with an inner circumference of the inner tube; a truncated cone-shaped body portion that connects the mounting portion and the sliding contact portion and has a hole formed to apply a resistance against a flow of a liquid moving inside and outside the collar; and a rib formed on an inner circumference of the body portion along the axial direction.

A leaf spring may include: an upper plate provided with arc-shaped portions which are integrally formed on both end portions thereof, respectively, for forming spring eyes; a lower plate disposed to overlap a lower side of the upper plate and provided with arc-shaped portions which are integrally formed on both end portions thereof, respectively, and face the arc-shaped portions of the upper plate to form the spring eyes; clamping units installed to restrain the both end portions of the overlapped upper and lower plates from being separated from each other; and a central fastening unit configured to fasten central portions of the overlapped upper and lower plates.

Proposed is a vibration damping device for a vehicle as an engine mount for a vehicle, wherein the vibration damping device solves the problem of vibration increase which may occur in the natural frequency of a rubber insulator by allowing the rubber insulator to have a plurality of unit insulation bodies having different natural frequencies, wherein the vibration damping device for a vehicle includes a center core, and the rubber insulator having an insulation body provided between the center core and a cylindrical casing, wherein the insulation body includes a plurality of separation grooves formed therein to have shapes extending in radial directions such that the insulation body is divided into a plurality of unit insulation bodies along a circumferential direction of the insulation body.

A contact ring including a ring-shaped structure formed of an electrically conductive material. The ring-shaped structure has a plurality of projections on at least one side and a plurality of blades on at least one side. The projections and the blades penetrate an electrically insulating surface layer of each of a pair of contact elements and contact an electrically conductive material of each of the contact elements to electrically connect the contact elements.

A device for volume compensation of damping liquid for a damper includes a hollow cylindrical main body containing the damping fluid. A rod extends through an end of the main body to the interior thereof. The rod is secured to a piston inside the body, which divides a compression chamber from an expansion chamber. A compensation chamber is connected to the compression and expansion chambers via internal channels of the rod and piston. A plurality of orifices in the piston open into the compression chamber and into the expansion chamber. A rigid slider moves freely in translation through, around or inside the piston and/or the rod and closes and opens the orifices to connect the compensation chamber to the expansion chamber (or, respectively, the compression chamber) in the compression (or, respectively, expansion) phases. The device may be used in vehicle wheel suspension assemblies.

A shell-based material, also referred to as a shellular or a shell-based mechanical metamaterial, is comprised of a plurality of unit cells that are each made of a curved shell, and contain at least one perforation on their snapping motif. The shell-based material has a predetermined number of structural stable states based on the snapping motif and on the at least one perforation. The predetermined number of structural stable states including a first structural stable state, for example an unloaded initial state, and a second structural stable state being different from the first structural stable state.

A present invention provides an anti-vibration device (1) which is equipped with a first tubular mounting member (11) connected to one of a vibration generating part and a vibration receiving part, and a second mounting member (12) connected to the other thereof; an elastic body (13) which connects the first mounting member and the second mounting member; and a partition member (16) which partitions a liquid compartment (19) in the first mounting member into a first liquid compartment (14) having the elastic body in a part of a bulkhead, and a second liquid compartment (15) in an axial direction along an central axis of the first mounting member, and has an orifice passage (24) through which the first liquid compartment and the second liquid compartment communicate with each other, in which a plurality of ridge parts (26) extending in a circumferential direction are formed on an inner surface (27) of the elastic body which defines the first liquid compartment in a radial direction.

A vehicle seat assembly includes a seat frame, a seat pan, and a plurality of vibration isolators interposed between the seat frame and the seat pan for limiting transmission of vibrations from the seat frame to the seat pan.