Hydropneumatic spring element

Claim 1

A hydropneumatic spring element, especially for use in connection with land vehicles, especially vehicles of the track laying type, which includes in combination: a crank case, cylinder-piston means connected to said crank case, girder means with first and second portions, hydraulic fluid storage means having an interior, said girder means having the first portion connecting one end of said cylinder-piston means and having said hydraulic fluid storage means connected to the second portion of said girder means, damping valve means supported by said girder means adjacent said cylinder-piston means including a cylinder with an interior and a piston, first conduit means adapted to be connected to a source of cooling fluid and leading to the interior of the cylinder of said cylinder-piston means and to the interior of said fluid storage means, rocker means rotatably journalled in said crank case for connection with a wheel rocker outside said crank case, a connecting rod with a crank pin at one end thereof pivotally connected to said rocker means, said connecting rod having another end portion pivotally connected to the piston of said cylinder piston means, a container made of elastomeric material arranged within said fluid storage means and provided with inlet valve means for connection with a source of gaseous medium and for conveying the gaseous medium into said container, a cooling jacket surrounding said girder means and said cylinder-piston means and said fluid storage means, and having an outlet and including second conduit means having an inlet connectable to a source of cooling liquid and communicating with the interior of said cooling jacket for conveying cooling liquid along the outer walls initially along said girder means and thereafter along said cylinder piston means and along said fluid storage means through said outlet.