Patent ID: 7182323
Filing Date: 2007-02-27
Classification: A47B,F16F

Abstract:
1. An arrangement for supporting a height-adjustable component comprising an approximately vertically extending upright which bears the component and includes a pneumatic spring, said pneumatic spring comprising a cylinder having a bottom end and a top end, said bottom end being connectable to a fixed portion of said arrangement, a piston displaceably arranged in said cylinder and dividing said cylinder into a bottom cylinder chamber and a top cylinder chamber, a piston rod connected to said piston, said piston rod projecting through said top cylinder chamber and being guided out of said top end of said cylinder, said piston rod having a free end for bearing the component, said top and bottom cylinder chambers having a gas filling under pressure which exerts a upwardly directed push-out force on said piston which is approximately equal in magnitude to an opposing weight-induced force of the component on said piston, a valve arranged in said piston for allowing a flow of gas from said top cylinder chamber into said bottom cylinder chamber and blocking a flow of gas from the bottom cylinder chamber into said top cylinder chamber, and a manually actuable connecting valve arranged in said pneumatic spring for selectively connecting said top and bottom cylinder chambers to one another, wherein said connecting valve and said valve arranged in said piston prevent inward movement of said piston and lowering of the component in response to an additional compressive force exerted on said piston when said connecting valve is closed, the additional compressive force being additional to the weight-induced force of the component on said piston.