Shock absorber

A shock absorber comprising:

• a cylinder;
• a piston disposed movably in the cylinder to partition the interior of the cylinder into first and second liquid chambers and having two groups of ports each group of which has at least a port affording communicating between said first and second liquid chambers;
• a valve body disposed so as to open and close the port of each group in the piston;
• a piston rod connected with said piston and projecting from said cylinder to the outside;
• a first partition member disposed in one end of said cylinder to define a third liquid chamber from said first liquid chamber and having two groups of ports each of which has at least a port affording communication between said first and third liquid chambers;
• a valve body disposed so as to open and close the port of each group in the partition member;
• a second partition member disposed in the other end of said cylinder to define a fourth liquid chamber from said second liquid chamber and having two groups of ports each of which has at least a port affording communication between said second and fourth liquid chambers;
• a valve body disposed so as to open and close the port of each group in the second partition member;
• a liquid path affording communication between the first and second liquid chambers without passing through the piston, said liquid path being communicated to a reservoir through a communicating means;
• and
• regulating means provided in said piston rod for completely preventing liquid from flowing through said two groups of ports in said piston.

A shock absorber comprising:

• a cylinder;
• a piston disposed movably in the cylinder to partition the interior of the cylinder into first and second liquid chambers and having two groups of ports each group of which has at least a port affording communication between said first and second liquid chambers;
• a valve body disposed so as to open and close the port of each group in the piston;
• a piston rod connected with said piston and projecting from said cylinder to the outside;
• a liquid path affording communication between said first and second liquid chambers without passing through said piston;
• first means and second means for generating respectively damping force with liquid flowing through the liquid path;
• and
• regulating means provided in said piston rod for blocking liquid from flowing through said two groups of ports in said piston, said regulating means including another piston disposed at an interval from said piston and having a path communicating one of said first and second liquid chambers with the interval and a spool for opening and closing the path of said another piston.

A shock absorber comprising:

• a cylinder;
• a piston disposed movably in the cylinder to partition the interior of the cylinder into first and second liquid chambers and having two groups of ports each group of which has at least a port affording communication between said first and second liquid chambers;
• a valve body disposed so as to open and close the port of each group in the piston;
• a piston rod connected with said piston and projecting from said cylinder to the outside;
• a first partition member disposed in one end of said cylinder to define a third liquid chamber from said first liquid chamber and having two groups of ports each of which has at least a port affording communication between said first and third liquid chambers;
• a valve body disposed so as to open and close the port of each group in the partition member;
• a second partition member disposed in the other end of said cylinder to define a fourth liquid chamber from said second liquid chamber and having two groups of ports each of which has at least a port affording communication between said second and fourth liquid chambers;
• a valve body disposed so as to open and close the port of each group in the second partition member;
• a liquid path affording communication between the first and second liquid chambers without passing through the piston;
• and
• regulating means provided in said piston rod for blocking liquid from flowing through said two groups of ports in said piston, said regulating means including another piston disposed at an interval from said piston and having a path communicating one of said first and second liquid chambers with the interval and a spool for opening and closing the path of said another piston.

A shock absorber comprising:

• a cylinder;
• a piston disposed movably in the cylinder to partition the interior of the cylinder into first and second liquid chambers and having two groups of ports each group of which has at least a port affording communication between said first and second liquid chambers;
• a valve body disposed so as to open and close the port of each group in the piston;
• a piston rod connected with said piston and projecting from said cylinder to the outside;
• a liquid path affording communication between said first and second liquid chambers without passing through said piston;
• first means and second means for generating damping force disposed respectively at both ends of said cylinder, each means having a valve body which opens and closes the liquid path and on which means for supplying spring force is worked, the damping force being generated when liquid flows through the liquid path with the valve body opened against said spring force;
• and
• regulating means provided in said piston rod for blocking liquid from flowing through said two groups of ports in said piston.

A shock absorber comprising:

• a cylinder;
• a piston disposed movably in the cylinder to partition the interior of the cylinder into first and second liquid chambers and having two groups of ports each group of which has at least a port affording communication between said first and second liquid chambers;
• a valve body disposed so as to open and close the port of each group in the piston;
• a piston rod connected with said piston and projecting from said cylinder to the outside;
• a liquid path affording communication between said first and second liquid chambers without passing through said piston;
• first means and second means for generating damping force, each means having a valve body which opens and closes the liquid path and on which means for supplying spring force is worked, the damping force being generated when liquid flows through the liquid path with the valve body opened against said spring force;
• and
• regulating means provided in said piston rod for blocking liquid from flowing through said two groups of ports in said piston, said regulating means including another piston disposed at an interval from said piston and having a path communicating one of said first and second liquid chambers with the interval and a spool capable of opening and closing the path of said another piston.