Hydraulic coupling device

A hydraulic coupling device comprising:

• an inner sleeve having a tapered outer surface,
• a single unitary outer sleeve having a tapered inner surface mounted on the tapered outer surface of the inner sleeve and having an axial outer surface having an axially facing annular recess,
• a nut screwed onto the inner sleeve, and
• a cylinder formed separately from the outer sleeve and secured to the outer sleeve,
• wherein the annular recess includes a first radial side, a second radial side and an axial bottom,
• wherein an axial end of the cylinder axially abuts the axial bottom of the annular recess,
• wherein at least a portion of the nut extends into the cylinder, and
• wherein the inner sleeve, the cylinder, the nut and the outer sleeve together delimit a chamber.

A hydraulic coupling device comprising:

• an inner sleeve having a tapered outer surface,
• an outer sleeve having a tapered inner surface mounted on the tapered outer surface of the inner sleeve,
• a nut screwed onto the inner sleeve, and
• a cylinder formed separately from the outer sleeve and secured to the outer sleeve,
• wherein at least a portion of the nut extends into the cylinder,
• wherein a surface of the inner sleeve, a surface of the cylinder, a surface of the outer sleeve and a first surface of the nut together delimit a chamber,
• wherein a second surface of the nut engages the inner sleeve, a third surface of the nut faces the cylinder and a fourth surface of the nut is located outside the chamber, and
• wherein a first seal element is located radially between the cylinder and the nut.