Patent ID: 6071096
Filing Date: 2000-06-06
Classification: F04B

Abstract:
A pneumatic cylinder for actuating an adjustable element, especially a smoke exhaust damper in a smoke and heat exhaust system, with a piston (2, 16, 30, 48) to which pressure can be admitted on both sides, which has at least one working face (6, 31) and which can be displaced by compressed air in a cylinder (1, 24, 29, 45, 72) having at least one working chamber (4, 33, 57, 79), with a piston rod (3) which is connected to a smoke exhaust damper, and with an energy accumulator provided with positioning means, which admits pressure to the working face under control of a control device, wherein actuated and hold actuated, especially opened, the adjustable element, especially a smoke exhaust damper, characterized in that as the energy accumulator there is provided an accumulator chamber in which air or compressed air is stored as the compressible pressurizing fluid, and which is in pressure-conducting communication with a compression face (7, 18) of the piston (2, 16, 30, 48) on its face turned away from the working face (6, 31), and in that the control device actuates a vent valve in pressure-conducting communication with the working chamber (4, 33, 57, 79).