Hygrama Ag

Volker Drittel

A rodless pressure cylinder (1) has a cylinder housing (2) with a longitudinal slot (6) through it and is closed on each end by a cylinder cap (12). The longitudinal slot (6) is sealed on its inside by an inner sealing strip (7) and as necessary is also covered on its outside by an outer sealing strip (8). The provided sealing strips (7,8) are fastened by special clamping elements (11), in or on the longitudinal slot (6). The cylinder caps (12) are provided on each side with connectors for the feed and discharge of pressure medium. Since the sealing strips (7,8) are fastened by the special clamping elements (11) independent of the caps (12), the cylinder caps (12) can be installed in various positions on the cylinder housing (2). They are constructed rotationally symmetrical for this purpose, which is particularly valid for the pressure medium channels in the interior of the cylinder caps (12). The cylinder caps (12) can therefore be mounted on the pressure cylinder (1), respectively such that the respective connector (17) for the pressure medium lies in a sufficiently accessible position of the mounted pressure cylinder (1).

Rodless pressure cylinder

A linear drive apparatus comprises a cylindrical casing having a longitudinal slot. A piston is located in an inner chamber of the apparatus and can be moved in longitudinal direction by differential pressures. This piston includes a projection extending through the longitudinal slot. The outer side and the inner side of the longitudinal slot are sealed off by a sealing strip. An air connector is in communication with the space between the two sealing strips, allowing the production of a vaccum or of an overpressure in the mentioned space.

Rodless cylinder

The pressurized medium cylinder has a longitudinally extending slot. The steel strip located for sealing purposes at the inner side of the surface of the cylinder and arrested by means of magnets is equipped with an injection molded plastic encasing, which forms at the outer side of the steel strip a plastic material strip which centers the steel strip relative to the longitudinal slot.

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Renningen, Germany

Volker Drittel