Lockable piston-cylinder assembly

Details Lockable piston-cylinder assembly Lockable piston-cylinder assembly

A - Human Necessities

47

C

138/87

A47C 20/04 (2006.01) A47C 3/30 (2006.01)

Patent

CA 1281614

A B S T R A C T Locakable piston-cylinder assembly to be mounted between two parts being movable relative to each other such as a frame and top or foot end of a bed structure. The two chambers (7, 8) resulting from the division of piston (2) in cylinder (1) are interconnected by a hollow piston rod (3) provided with openings (9 and 10). At least one of these openings can be closed by valve member (4) arranged in said piston rod and so connection between these chambers (7, 8) is controlled. Valve member (4) is actuatable from one end of piston rod (3) outside cylinder (1). For obviating undesired pressure build up in space (20) or for controlling the pressure in this space a connection (14) is provided to the exterior of cylinder (1).

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