Disclosed is a variable damping force shock absorber including a tube cylinder having an inner tube filled with a fluid and an outer tube, a valve housing coupled to a piston rod in the inner tube and having a connection flow path formed therein, a first piston valve coupled to the outside of the valve housing to partition the inner tube into a compression chamber and a rebound chamber, and a second piston valve provided inside the valve housing, wherein the valve housing includes a magnet provided at an upper portion thereof and connected to the piston rod, and a plunger disposed between the magnet and the second piston valve at a lower portion thereof to selectively open and close the connection flow path by a magnetic field of the magnet, and wherein the fluid passes only through the first piston valve when the plunger closes the connection flow path, and the fluid passes through the first piston valve and the second piston valve when the plunger opens the connection flow path.

A straddle-type vehicle includes a vehicle body frame; a power unit supported by the vehicle body frame; a seat mounted at a position higher than the power unit; a handle bar mounted at a position more forward than the seat; a pair of front wheels spaced apart from each other in a vehicle width direction; a pair of suspensions spaced apart from each other in the vehicle width direction and connecting the pair of front wheels to the vehicle frame; and a vehicle body vibration control damper including end portions connected to a first attachment portion and a second attachment portion, respectively, mounted on the vehicle body frame so as to be spaced apart from each other in a vehicle front-back direction, and mounted so as to extend in the vehicle front-back direction with at least a portion thereof located between the pair of suspensions.

This shock absorber includes a first valve assembly connected to one end of a tube in an axial direction, a piston assembly dividing an inner chamber of the tube into a first chamber and a second chamber, a piston rod extending from the tube through the first chamber with the piston assembly connected to an intermediate position in the axial direction, a cup provided in the second chamber, and a second valve assembly disposed in the second chamber to be connected to the piston rod and configured to enter and exit from the cup. The cup includes a sleeve disposed in the second chamber with a gap between itself and the tube in a radial direction, and a base adapter fixed to the sleeve by press fitting and provided between the sleeve and the first valve assembly.

This shock absorber includes a first valve assembly connected to one end of a tube in an axial direction, a piston assembly dividing an inner chamber of the tube into a first chamber and a second chamber, a piston rod extending from the tube through the first chamber with the piston assembly connected to an intermediate position in the axial direction, a cup provided in the second chamber, and a second valve assembly disposed in the second chamber to be connected to the piston rod and configured to enter and exit from the cup. The cup includes a sleeve disposed in the second chamber with a gap between itself and the tube in a radial direction, and a base adapter fixed to the sleeve by press fitting and provided between the sleeve and the first valve assembly.

A dual-axle vehicle corner assembly which may include a sub-frame, a first arm connected to the sub-frame and rotatable with respect to the sub-frame about a first arm axis, the first arm having a first axle axis about which a first wheel rotates when connected to the first arm, a second arm connected to the sub-frame and rotatable with respect to the sub-frame about a second arm axis, the second arm having a second axle axis about which a second wheel rotates when connected to the second arm, and a suspension system comprising a piston assembly interconnecting the first arm and the second arm, the piston assembly is to controllably increase and decrease a length of the piston assembly to control a distance between the first axle axis and the second axle axis.

The present invention relates to a multipurpose viscous damper (100), comprising: an outer cylinder (101); a core rod (102) positioned in the outer cylinder (101); a core piston (103) positioned in the middle and surrounded the core rod (102); a plurality of bypass pipes (104) extending along the outer cylinder (101), each bypass pipe (104) being connected to the outer cylinder (101) adjacent to the two ends of the outer cylinder (101); an orifice controller (105) located on the bypass pipes (104) for providing initial adjustable damping during low to moderate vibration; and characterized by a pair of inner cylinders (106) positioned inside the two ends of the core rod (102); an inner piston (107) positioned in each inner cylinder (106); a fixed sealing (108) located at the two end of each of the inner cylinders (106); and an orifice (109) located at the two ends of the inner cylinder (106) for allowing fluid flowing from the inner cylinder (106) to the outer cylinder (101) during movement of inner piston (107).

A damper for absorbing impact shock generated upon docking of a moving structure with a stationary structure or foundation is shown, the damper comprising a cylinder (1) connectable to the docking structure, the cylinder arranged with a cap end and a head end and having a piston (2) arranged movable in the cylinder and separating a cylinder cap volume (13) from a cylinder head volume (10). A check valve (14), a pressure relief valve (15) with adjustable opening pressure and an orifice (16; 23) of static size are respectively arranged in the cap end of the cylinder, wherein under constant load from the piston during a terminal stroke length of the damper in compression, the orifice provides a restricted flow from cylinder cap volume generating a constant pressure in the cylinder cap volume below the opening pressure of the pressure relief valve.

A damper for absorbing impact shock generated upon docking of a moving structure with a stationary structure or foundation is shown, the damper comprising a cylinder (1) connectable to the docking structure, the cylinder arranged with a cap end and a head end and having a piston (2) arranged movable in the cylinder and separating a cylinder cap volume (13) from a cylinder head volume (10). A check valve (14), a pressure relief valve (15) with adjustable opening pressure and an orifice (16; 23) of static size are respectively arranged in the cap end of the cylinder, wherein under constant load from the piston during a terminal stroke length of the damper in compression, the orifice provides a restricted flow from cylinder cap volume generating a constant pressure in the cylinder cap volume below the opening pressure of the pressure relief valve.

A rigid substructure (12) tied to a restrained column (16) at different floors undergoes rigid body rotation due to lateral dynamic loading. Flexural members (18) that are connected to the substructure (12) and another anchor column (14) resist the rigid body rotation and undergo vertical deflections. Damped diagonals (20) connected to common nodes of the rigid substructure and flexural members, for one embodiment, receive amplified displacements and more effectively dissipate energy. Flexural members restore the structure to the unloaded position. The system does not require moment connections and can work with flexure induced in simply supported beams. The system is highly effective and may remain elastic under maximum considered earthquake ground motions.

A rigid substructure (12) tied to a restrained column (16) at different floors undergoes rigid body rotation due to lateral dynamic loading. Flexural members (18) that are connected to the substructure (12) and another anchor column (14) resist the rigid body rotation and undergo vertical deflections. Damped diagonals (20) connected to common nodes of the rigid substructure and flexural members, for one embodiment, receive amplified displacements and more effectively dissipate energy. Flexural members restore the structure to the unloaded position. The system does not require moment connections and can work with flexure induced in simply supported beams. The system is highly effective and may remain elastic under maximum considered earthquake ground motions.