초록 ▼

A piston-cylinder type oil damper includes a cylinder containing oil, a piston inserted within the cylinder for dividing the interior of the cylinder into a head chamber and a rod chamber, a rod passing through the rod chamber and projecting out of a rod end of the cylinder, a cover slidably penetra

A piston-cylinder type oil damper includes a cylinder containing oil, a piston inserted within the cylinder for dividing the interior of the cylinder into a head chamber and a rod chamber, a rod passing through the rod chamber and projecting out of a rod end of the cylinder, a cover slidably penetrated by the rod and closing the rod end, and a floating piston inserted within the head or rod chamber so as to form an air chamber. The piston is provided with axial through-holes for causing the oil within the head and rod chambers to flow therethrough in opposite directions. The rod is provided with an axially movable valve plate brought into contact with one side of the piston for partially shielding the through-holes.

대표청구항 ▼

A piston-cylinder type oil damper, comprising: a cylinder containing oil; a piston disposed within said cylinder for dividing the interior of said cylinder into a head chamber and a rod chamber, and provided with axial through-hole means for permitting said oil within said head chamber and said rod

A piston-cylinder type oil damper, comprising: a cylinder containing oil; a piston disposed within said cylinder for dividing the interior of said cylinder into a head chamber and a rod chamber, and provided with axial through-hole means for permitting said oil within said head chamber and said rod chamber to flow therethrough in opposite directions; a piston rod passing through said rod chamber so as to have an intermediate portion thereof connected to said piston and a first proximal end thereof connected to a force generating means for moving said piston rod and said piston in opposite directions within said cylinder; and a valve plate axially movable upon a second distal end of said piston rod between a first position at which said valve plate is separated from said piston so as to entirely uncover said axial through-hole means in order to permit free flow of said oil therethrough between said rod chamber and said head chamber, and a second position at which said valve plate is brought into contact with one side of said piston so as to partially shield said axial through-hole means in order to define only partially reduced flow therethrough between said rod chamber and said head chamber.