Abstract: A damper of the gear type useful for a movable portion of video tape decks and other apparatus, comprising a damper case formed with an internal gear on its inner periphery, a sun gear shaft having an input shaft at its one end and rotatably disposed in the center of the damper case, and planetary gear units provided around the sun gear shaft and arranged in a plurality of stages along the sun gear shaft, each comprising a sun gear, a plurality of planetary gears and the internal gear. The planetary gears of the unit in the first stage are rotatably supported by the input shaft. The planetary gears of each of the other stages are rotatably supported by the sun gear of the immediately preceding unit. The meshing engagement of the multi-stage gear stage gives resistance, for example, to a spring for withdrawing the tape accommodating portion of a video tape deck to produce a damping effect.

Abstract: An air damper comprises a cylinder having air ports at its upper and lower portions, a piston rod, a piston movably mounted on one end of the piston rod, a return spring, an air passage provided between upper and lower chambers within the cylinder which passage is opened and closed by the movement of the piston, and an air regulating valve press-fit into the lower air port portion of the cylinder.