PISTON-TYPE SHOCK-ABSORBER FOR DOOR Russian patent published in 2002 - IPC

FIELD: municipal and industrial equipment, applicable for absorption of shock of automatically closing doors in residential, production and public buildings. SUBSTANCE: the shock-absorber has a cylindrical body with a bottom on one end and a cover on the other end. The body accommodates a spring-loaded piston with a rod sealed on one side. The piston has an opening shifted in the radial direction, and a bush is installed in it. A bar is freely installed in the bush, the bar has a longitudinal groove with a depth varying in length. For smooth adjustment of the degree of dampening a screw is installed in the bottom of the shock-absorber body, together with the opening wall the screw forms an adjustable air duct. EFFECT: provided adjustment of the dampening properties in manufacture of the shock-absorber and in the process of its adjustment. 2 cl, 1 dwg