초록 ▼

In a shock absorber device, a piston rod unit is axially displaceable through a cylindrical member from one end toward the other end thereof. The cylindrical member forms a variable volume working chamber containing a first fluid. A spring chamber is in communication with the working chamber so that

In a shock absorber device, a piston rod unit is axially displaceable through a cylindrical member from one end toward the other end thereof. The cylindrical member forms a variable volume working chamber containing a first fluid. A spring chamber is in communication with the working chamber so that the first fluid can flow between the two chambers. A pressurized second fluid is contained within the spring chamber separate from the first fluid and it acts on the first fluid for biasing the piston rod unit out of the working chamber. When the piston rod unit is moved into the working chamber and approaches an inner end position, it forms at least in part a damping chamber which decelerates the movement of the piston rod unit.

대표청구항 ▼

A shock absorber device comprising an axially elongated cylindrical member having a first end and a second end spaced apart in the axial direction thereof, a piston rod unit including an axially elongated piston rod extending into said cylindrical member through the first end thereof, said piston ro

A shock absorber device comprising an axially elongated cylindrical member having a first end and a second end spaced apart in the axial direction thereof, a piston rod unit including an axially elongated piston rod extending into said cylindrical member through the first end thereof, said piston rod extending outwardly from the first end of said cylindrical member, said piston rod being movable in the axial direction of said cylindrical member between a first end position where the minimum axial length of said piston rod extends through the first end into said cylindrical member and a second end position where the maximum axial length of said piston rod extends through said first end into said cylindrical member toward said second end thereof, said cylindrical member forming a variable volume working chamber therein with the volume depending on the position of said piston rod between the first and second end positions, a spring chamber, means for forming a flow passageway connecting said spring chamber to said working chamber in said cylindrical member, said working chamber and said spring chamber being arranged to hold a body of a first fluid which fills said working chamber and partially fills said spring chamber, means in said spring chamber arranged to be contacted by the first fluid for transmitting pressure to the first fluid in said spring chamber and therefrom to said working chamber for biasing said piston rod toward the first end of said cylindrical member, means for forming at least a part of a damping chamber in fluid flow communication with said working chamber the volume of said damping chamber being reduced only when said piston rod passes an intermediate position between said first and second end positions in moving toward said second end of said cylindrical member, said means forming at least a part of said damping chamber arranged to form at least in part a throttled passageway communicating between said working chamber and said damping chamber so that a throttled flow of the first fluid flows from said damping chamber into said working chamber only when said piston rod passes said intermediate position between said first and second end position in moving toward the second end of said cylindrical member.