초록 ▼

A gas spring with end positions damping has a cylindrical housing filled with a fluid under pressure, in which a piston rod, sealingly extending from one end of the housing, is disposed to be coaxially slideable and on the inner end of which a piston is attached. To create an end position damping th

A gas spring with end positions damping has a cylindrical housing filled with a fluid under pressure, in which a piston rod, sealingly extending from one end of the housing, is disposed to be coaxially slideable and on the inner end of which a piston is attached. To create an end position damping that is simple in structure, and which can be used purely pneumatic, purely hydraulic or hydropneumatic, an auxiliary piston in the form of a throttle piston is slidingly disposed on the piston rod, which is supported via an energy accumulator towards the end of the housing where the piston rod exits. The piston abuts against this auxiliary piston at the end of the extension movement of the piston rod. Its throttle effect is larger during movement in the direction toward the end where the piston rod exits than in the opposite direction.

대표청구항 ▼

A gas spring with plural damping phases, comprising a piston rod disposed axially in a cylindrical housing having a first closed end and a second end through which said piston rod sealingly extends out from said housing and retracts thereinto, said housing containing at least one fluid and at least

A gas spring with plural damping phases, comprising a piston rod disposed axially in a cylindrical housing having a first closed end and a second end through which said piston rod sealingly extends out from said housing and retracts thereinto, said housing containing at least one fluid and at least partially filled with a gas under pressure, a damping piston disposed on the end of said piston rod in said housing, an independent auxiliary piston provided about and guided on said piston rod between said damping piston and said second end of said housing, said auxiliary piston including damping means for allowing said at least one fluid to pass with substantially more damping when said auxiliary piston is moved towards said second end of said housing than when moved towards said first end thereof, said auxiliary piston comprising at least one permanently open throttle duct and said throttle duct being formed between the piston rod and the auxiliary piston, said damping means including energy accumulator means, and further providing that when said piston rod is extended a predetermined amount, further extension of the piston rod in the direction of said second end results in increased damping including by said energy accumulator means, and wherein a throttle effect of the auxiliary piston is independent of the damping effect of the damping piston.