Working cylinder with pressure medium overflow

A working cylinder with pressure medium overflow, comprising:

• a cylinder tube with an inner wall and a first and a second closure part defining an interior, said cylinder tube having a first and a second pressure medium connection;
• a piston unit having a piston and a piston rod, said piston being arranged in said interior and defining a first and second working chamber, said first pressure medium connection being assigned to said first working chamber and said second pressure medium connection being assigned to said second working chamber,
• said piston having a circumferential first inner ring groove and a seal arranged in said first inner ring groove resting against said inner wall and separating said first and the second working chambers from each another,
• said seal having an axial movement clearance in said first inner ring groove;
• said piston having a circumferential second inner ring groove with a piston ring arranged therein, said piston ring resting resiliently against said inner wall and having a piston ring gap;
• said cylinder tube having a recess in said inner wall arranged axially positioned opposite said first inner ring groove in an end position of said piston at said first closure part,
• the working cylinder being constructed for an overflow operating state and a stroke operating state,
• in the overflow operating state:
• said piston being positioned in the end position at said first closure part, said seal being positioned in a distal clearance end position of an axial movement thereof in a direction of said first closure part by pressurization of said second working chamber for opening an overflow cross section between a radial limit of said seal and said recess, and an overflow channel being opened from said second pressure medium connection via said second working chamber, said overflow cross section, said piston ring gap and said first working chamber up to said first pressure medium connection;
• and
• in the stroke operating state:
• said seal being positioned in a proximal clearance end position opposite the distal clearance end position by pressurization of said first working chamber closing said overflow cross section and said overflow channel.