Patent ID: 7493848
Filing Date: 2009-02-24
Classification: F15B,F16J

Abstract:
1. A magnet type rodless cylinder comprising a non-magnetic cylinder tube disposed between end caps at two ends of the cylinder tube, a piston able to move in said cylinder tube in an axial direction of the cylinder tube up to positions for striking/contacting said end caps, and a non-magnetic slide arranged along an outer circumference of said cylinder tube and able to move in the axial direction of the cylinder tube, said piston being provided with an inside magnet and said slide being provided with an outside magnet or outside magnetic member, said inside magnet and said outside magnet or outside magnetic member magnetically coupling said piston and said slide, so that when said piston is moved, said slide follows said piston and moves in the axial direction of the cylinder tube, wherein the magnet type rodless cylinder includes at any one time one of a connection mount and external dampers said connection mount being removably attachable to a top of the slide and having projecting parts projecting out from said slide in at least the axial direction of the cylinder tube when the connection mount is attached to the slide, so that the distance between each projecting part of said connection mount and each end cap is set at a value smaller than a predetermined value when the piston is at the positions for striking/contacting said end caps, and said external dampers being removably attachable to said end caps so that the distance between each external damper and said slide is set at a value smaller than said predetermined value when the piston is at the positions for striking/contacting said end caps, wherein said predetermined value is a half of an axial pitch length of a magnetic circuit comprised of the inside magnet and an internal yoke arranged alternately with the inside magnet and wherein when the connection mount is attached to the slide, the external dampers are not attached to the end caps and when the external dampers are attached to the end caps, the connection mount is not attached to the slide.