Abstract: An apparatus for connection between relatively movable parts. The apparatus includes a variable volume chamber having a first portion for connection with one of the parts and a second portion for connection with another of the parts. The chamber has fluid therein for resisting movement of the parts relative to each other. A valve controls the fluid flow from the chamber to a location at which the fluid does not resist relative movement of the parts. The valve includes a valve member movable from a first position to provide fluid communication between the chamber and the location. An electroviscous fluid control device resists movement of the valve member form the first position.

Abstract: A vibration isolator is formed with a spring mechanism and a fluid transmion mechanism interposed between a vibrating member and a support member. The fluid transmission mechanism includes a primary fluid chamber and a secondary fluid chamber, with the secondary fluid chamber being deformed to a greater extent than the primary fluid chamber as a result of vibrations. An inertia mass operatively associated with the secondary fluid chamber is displaced as a result of vibrations and is thereby accelerated with a resulting inertia force causing fluid pressure change in the fluid transmission mechanism which compensates as a dynamic force the dynamic portion of the spring force transmitted from the spring mechanism to the support member.

Abstract: A suspension includes a shock absorber and a bushing. A piston rod of the shock absorber has a bypass path for affording communicating between two liquid chambers partitioned by a piston inside a tube and two paths formed above the bypass path. A bushing inner tube connected to the piston rod has two paths communicating respectively to two paths in the piston rod. A bushing is disposed diametrally outside the bushing inner tube, interposed between the bushing inner tube and a car body and has two fluid chambers communicating respectively to two paths in the bushing inner tube. A valve body for adjusting the damping force of the shock absorber and the spring constant and damping force of the bushing is disposed in the piston rod.