초록 ▼

An air damper includes: a piston adapted to reciprocate in a cylinder; an annular recessed portion formed along an outer periphery of the piston; a sealing member fitted in the recessed portion in a slidable manner, adapted to slidingly contact an inner peripheral surface of the cylinder, and formin

An air damper includes: a piston adapted to reciprocate in a cylinder; an annular recessed portion formed along an outer periphery of the piston; a sealing member fitted in the recessed portion in a slidable manner, adapted to slidingly contact an inner peripheral surface of the cylinder, and forming air chambers on both sides of the piston, respectively, together with the piston; a communicating device allowing the air chambers formed on both sides of the piston to communicate with each other or not to communicate with each other depending on a stopping position of the sealing member; and a reduced-diameter portion formed by reducing a diameter of the cylinder on one end side thereof so as to gradually increase a frictional force between an inner periphery of the reduced-diameter portion and the sealing member.

대표청구항 ▼

[ What is claimed is:] [1.] An air damper comprising:a cylinder having a first end portion and a second end portion;a piston adapted to reciprocate in said cylinder;an annular recessed portion formed along an outer periphery of said piston;a sealing member slidably movable between at least two posit

[ What is claimed is:] [1.] An air damper comprising:a cylinder having a first end portion and a second end portion;a piston adapted to reciprocate in said cylinder;an annular recessed portion formed along an outer periphery of said piston;a sealing member slidably movable between at least two positions in said annular recessed portion, said sealing member slidingly contacting an inner peripheral surface of said cylinder, said sealing member and said piston cooperating to form first and second air chambers on both sides of said piston;communicating means allowing said first and second chambers to communicate with each other or not to communicate with each other depending on the position of said sealing member in said recess; anda groove portion formed in said inner peripheral surface of said cylinder so as to extend in an axial direction of said cylinder from said first end portion of said cylinder to form a gap between said sealing member and said inner peripheral surface.