Patent ID: 8146720
Filing Date: 2012-04-03
Classification: F16F

Abstract:
1. A shock absorber for a transportation means comprising: a sleeve having a longitudinal axis, said sleeve defining a sleeve interior surface; a piston defining a lateral surface extending along the longitudinal axis, said lateral surface of the piston is coupled with a seal; said piston operatively accomplishes reciprocal movements consisting of forward and reverse travels within said sleeve; a rod having a first end rigidly coupled with the piston and a second end extending beyond said sleeve; a piston cap enclosing said sleeve from the piston's side; a rod cap enclosing said sleeve from the rod's side; wherein: said sleeve is configured according to one of the following options: c) inside said area adjoined to said piston cap, said interior space of the sleeve along the sleeve includes at least two sections; on each said section the sleeve's inner diameter, being measured along a direction from said piston cap to said rod cap, decreases to a value of minimum inner diameter of said sleeve on the corresponding said section, and then increases to a value of maximum inner diameter of said sleeve on the corresponding said section; and wherein the decrease of said inner diameter to a value of minimum inner diameter of said sleeve on the corresponding said section and the increase of said inner diameter to a value of maximum inner diameter of said sleeve on the corresponding said section are formed as annular humps; and wherein said seal has an annular shape defining two side surfaces extending transversely to the longitudinal axis of said sleeve, said two side surfaces interact with said annular humps during the forward and reverse travels, such that the interaction causes deformations of said seal thereby operatively cushioning impacts and reducing overloads of the shock absorber.