A sheet-shaped cushioning rubber including a planar base portion and a three-dimensional portion formed to rise from the base portion toward one side in a sheet thickness direction, the planar base portion and the three-dimensional portion being alternately provided in one direction of a sheet plane, wherein the three-dimensional portion includes a hollow portion that opens toward the other side in the sheet thickness direction. The three-dimensional portion is integrally provided with a first rising surface that is continuous from the base portion, a top surface, a second rising surface on a side opposite to the first rising surface, and a pair of rising surfaces on both sides in a sheet width direction, and the hollow portion opens only toward the other side in the sheet thickness direction.

A vibration absorbing apparatus is disclosed for functioning as a practical mechanical metamaterial for anisotropic vibration control. In at least one embodiment, the apparatus provides a plurality of rail units positioned in a side-by-side arrangement so as to form at least one rail unit layer. Each rail unit provides a first plate and an opposing second plate slidably engaged with the first plate. The first plate provides at least one substantially linear slide rail extending therefrom. The second plate provides a corresponding at least one substantially linear slot sized for slidably receiving the corresponding at least one slide rail. At least one resilient connector extends between the first and second plates so as to maintain slidable engagement between the first and second plates. Additionally, the at least one slot of each rail unit of the at least one rail unit layer is oriented in substantially the same direction.

The present invention relates to a piston rod end for absorbing forces on a linear actuator in a train coupler, the piston rod end comprising a housing (2) enclosing a cavity (23) with a bottom surface (24), the cavity (23) extending in a longitudinal direction in the housing (2), —an elongated insert (3) arranged at least partly inside the cavity (23) of the first portion (P), a spring (5) arranged inside the cavity (23), and a fastening device (4) comprising a transversal element (41) and a longitudinal slot (42) forming a play, one being arranged in the housing and the other in the insert, and configured to cooperate in such a way that the transversal element extends into the slot in a transversal direction in relation to the housing and is movable in the play. The invention also relates to a piston assembly and to a sealing method for sealing the piston rod end.

A dispensing pump includes a polymer compression spring assembly, base vents and a flow baffle. The dispensing pump includes a pump base, and a dispensing head having a piston stem. The polymer compression spring assembly includes a slotted tubular spring element and first and second loading cones received at opposing ends of the slotted tubular spring element. The venting ports allow air to escape when capping the container after filling and the flow baffle reduces or prevents the product from being pulled into the pump accumulator before residual air (headspace) has been evacuated from the container during the initial priming strokes.

A gate opening and closing assistance device for a vehicle includes: a gas lifter including a cylinder filled with a compressible material, and a cylinder rod inserted into the cylinder to slide relative to the cylinder by compression or expansion of the compressible material; an inner housing which extends in a direction in which the cylinder rod extends, has one end coupled to one end of the cylinder rod to be slid together according to the sliding of the cylinder rod, and has an inner circumferential surface in contact with the cylinder while surrounding the gas lifter from the outside; and an outer housing which extends in a direction in which the cylinder extends, has a first end coupled to one end of the cylinder, has a second end through which the inner housing inserted, and surrounds a portion or the whole of the inner housing.

Provided is a shock absorber capable of improving the dimensional quality and ensuring the sealing performance of a seal ring. The shock absorber includes a cylinder, an outer tube, an intermediate tube, and a discharge passage defined between the intermediate tube and the cylinder, a reservoir defined between the intermediate tube and the outer tube. The intermediate tube includes, on its inner circumferential surface, a groove having a concave shape in cross section to be capable of accommodating a seal ring that closes the discharge passage. A relationship of θ1<θ2 is satisfied, where θ1 represents an angle formed between one side surface, out of both side surfaces of the groove of the intermediate tube, that is located on an axial end side of the intermediate tube, and a plane orthogonal to an axial direction of the intermediate tube, and θ2 represents an angle formed between the other side surface that is located on an axial center side of the intermediate tube and the plane.

A limiting passage (24) includes: a first communication section (26) that opens to a first liquid chamber; a second communication section (27) that opens to a second liquid chamber; and a main body flow passage (25) that is configured to provide communication between the first and second communication sections. At least one of the first and second communication sections includes a plurality of fine holes (31). A vortex chamber (25b) is disposed at a portion of the main body flow passage, which is connected to at least one of the first and second communication sections, is configured to form a swirling flow of liquid according to a flow velocity of liquid flowing from the other of the first and second communication sections, and causes the liquid of the swirling flow to flow out through the plurality of fine holes. A barrier wall (36a) in which the plurality of fine holes are formed extends in a direction across a vortex axis along a central axis (O2) of the vortex chamber. Among the plurality of fine holes, fine holes located on an inner side in a swirl radial direction across the vortex axis in a top view of the barrier wall have a lower flow resistance than fine holes located on an outer side in the swirl radial direction.

Systems, apparatus, and methods provide a material, comprising a first section including a first plurality of geometric elements associated with a first characteristic, the first section having a first set of mechanical properties; a second section including a second plurality of geometric elements associated with a second characteristic, the second section having a second set of mechanical properties different from the first set of mechanical properties; and a third section including a third plurality of geometric elements having a change in configuration that provides a transition from the first characteristic to the second characteristic.

A wind power generation apparatus, a tower and a method for suppressing a tower shadow effect of the tower. The tower is provided with suction through holes extending through a circumferential wall thereof, and the suction through holes are distributed in a circumferential direction of the tower; the tower is further provided with a suction apparatus, and the suction apparatus can perform suction to the suction through holes from outside to inside. With the tower and the method, when the suction through holes at a windward side are suctioned, the adverse influence of the tower shadow effect can be weakened or eliminated, a service life of a pitch varying bearing can be prolonged, a noise can be reduced and a wind energy utilization coefficient can be improved. When the suction through holes at a position of a bypassing flow detachment are suctioned, vortex-induced vibrations can also be suppressed.

The fluid damper device (10) includes a rotor (30) inserted into a case (20) in a bottomed tube shape and a cover (60) fixed to an opening part (29) of the case (20). The inner peripheral face of the case (20) is formed with the welding protruded part (80) welded to the cover (60) in a part in a circumferential direction. As the flow-out prevention part (90), a second flow-out prevention part (92) is formed on the inner peripheral side of the welding protruded part (80) on the other side (L2) in the axial line (L) direction with respect to the welding range (X). A circular arc-shaped step face (76) functioning as a flow-out restriction part (95) is provided on the other side (L2) in the axial line (L) direction of the second flow-out prevention part (92) and the projected resin is restricted from reaching to the O-ring (49).