Fluid driven working cylinder without a piston rod

Abstract

A fluid-driven working cylinder without a piston rod is provided with a cylinder housing (4) which in cross-section is fully closed, and along which a force takeaway (1) is guided without turning. The force takeaway (1) is connected with a band (7) that extends respectively from each of the ends of the cylinder housing (4) and is fastened to the piston. The band (7) is externally guided over two reversing wheels. To avoid leaks of the cylinder housing (4) during pressurization the interior of the cylinder housing (4) is divided into a piston space (8), in which the working piston is moved back and forth, and a band space (9), which is separated from piston space (8), but which is connected with the piston space (8) by means of a longitudional slit (10) which is sealed off by a sealing strip (5). Band (7) runs in the band space (9) and is connected to the piston by means of linkage (6) which projects through the longitudinal slit (10). This construction permits the preferred usage of a toothed belt or a chain as a band.

Dependencies are inferred from the claim text.