Abstract: A hydraulic damper device includes a cylinder unit including a cylinder body having an inner surface and a plug, and a piston unit including a piston, a piston rod and a valve member. The piston defines an annular groove. The valve member is disposed movably in the annular groove. The piston cooperates with the inner surface to define a valve opening and a valve seat. The valve seat has a truncated conical surface. The valve member is movable between a closing position, in which the valve member covers sealingly the valve opening and abuts against the truncated conical surface, and an opening position, in which the valve member is spaced apart from the truncated conical surface.

Abstract: A hydraulic damper device includes a cylinder unit including a cylinder body having an inner surface and a plug, and a piston unit including a piston, a piston rod and a valve member. The piston defines an annular groove. The valve member is disposed movably in the annular groove. The piston cooperates with the inner surface to define a valve opening and a valve seat. The valve seat has a truncated conical surface. The valve member is movable between a closing position, in which the valve member covers sealingly the valve opening and abuts against the truncated conical surface, and an opening position, in which the valve member is spaced apart from the truncated conical surface.

Abstract: A hydraulic damper device for retarding movement of a movable member toward a stationary member, includes a cylinder, an axially shiftable plug disposed in the cylinder to partition a receiving chamber into liquid and air compartments, a piston axially movable in the liquid compartment to divide the same into plug-side and end-side sub-compartments and having a passage, a piston rod secured to the piston and extending along the axis through the axially shiftable plug to permit axial movement of the piston. When the piston proceeds with a final stage of retarding movement, the axially shiftable plug is urged to move by virtue of an increased pressure in the plug-side sub-compartment for generating an increased counteracting force in the air compartment against the increased pressure, thereby further slowing down the retarding movement of the piston.

Abstract: A hydraulic damper device for retarding movement of a movable member toward a stationary member, includes a cylinder, an axially shiftable plug disposed in the cylinder to partition a receiving chamber into liquid and air compartments, a piston axially movable in the liquid compartment to divide the same into plug-side and end-side sub-compartments and having a passage, a piston rod secured to the piston and extending along the axis through the axially shiftable plug to permit axial movement of the piston. When the piston proceeds with a final stage of retarding movement, the axially shiftable plug is urged to move by virtue of an increased pressure in the plug-side sub-compartment for generating an increased counteracting force in the air compartment against the increased pressure, thereby further slowing down the retarding movement of the piston.

Abstract: A package box module for packaging an object is disclosed, which includes a package box having a sidewall and plural first coupling structures disposed on the sidewall, and a common cushion disposed between the object and the sidewall. The common cushion includes plural second coupling structures and plural flexible structures disposed between the second coupling structures. The common cushion can be enlarged by extending the flexible structures, so that the first coupling structures couple to the second coupling structures, thus a gap between the object and the package box is filled by the common cushion.

Abstract: A sprinkling appartaus for cooling tower includes nozzle groups having water tubes and air tubes through the tower wall and corresponding guiding assemblies wherein both water and air tubes have one ends within and adjacent to tower wall and the other ends pierced through tower wall and throttle valve to communicate with water and air tanks respectively, and one end of water tube is bent to face the air discharged opening of air tube; the air tube is oblique with respect to tower wall for effecting a whirling motion in discharged air; and each guiding assembly includes a baffle plate having an engagement portion, a spindle having one end pivotably secured to baffle plate and the other end secured to tower wall, and an adjustment bolt obliquely pierced through tower wall to urge on engagement portion.

Abstract: A rotary incinerator for disposal of industrial waste is provided. The incinerator is slopedly and rotatably disposed to a slant support and has a plurality of spirally arranged tubular conveying ribs on entire inner periphery for squeezedly transmitting the incinerating waste from the lower portion to an exit in the tapered upper end so that the waste is stirred while incinerating and the slag and ash are automatically discharged via the exit, a combustion system worked together with a ventilation system at a lower end for supplying the flame and the fresh air into the incinerator, a drive system for driving the incinerator to rotate and a control device for controlling the operation of the above recited elements. The improvement is characterized in safe and rapid incineration of the industrial waste, therefore, economical.