Patent ID: 6321636
Filing Date: 2001-11-27
Classification: F15B

Abstract:
A piston rod-less pneumatic cylinder which comprises:a cylinder tube which has a longitudinal slot extending from an outer surface to an inner surface thereof, first and second walls of said cylinder tube providing said longitudinal slot defining longitudinally-extending sealing areas at respective inner portions thereof, said first wall including a longitudinal groove which provides first and second fixing edges located nearer said inner tube surface and said outer tube surface, respectively,a piston located in said cylinder tube and longitudinally movable therein,a transmission element located outside said cylinder tube and connected through said longitudinal slot to said piston to be longitudinally movable with said piston,a sealing tape positioned in said cylinder tube to seal said longitudinal slot longitudinally of a location of said piston, said sealing tape including a longitudinal sealing strip which is positionable against said longitudinal sealing areas of said first and second walls of said cylinder tube, and a first longitudinal fixing strip which extends from said longitudinal sealing strip into said slot, said first longitudinal fixing strip including a first longitudinal fixing element for abutting said first fixing edge so as to retain said sealing strip positioned against said longitudinal sealing areas, andan outer band located on the outer side of said cylinder tube to seal said longitudinal slot in a longitudinal direction, said outer band including a second longitudinal fixing strip which extends into said slot, said second longitudinal fixing strip including a second longitudinal fixing element for abutting said second fixing edge so as to retain said outer band in sealing contact with said cylinder tube.said sealing tape and said outer band passing through channels in said piston.