Hydraulic actuating apparatus for opening and closing a vehicle cover with auxiliary manual hydraulic pump

A vehicle which includes a cover and a hydraulic actuating apparatus for opening and closing the cover, said hydraulic actuating apparatus comprising:

• a piston/cylinder device which is mounted in said vehicle and includes a cylinder and a piston, said piston including a head which moves in said cylinder to define first and second variable volume operating spaces in said cylinder and a rod which is connected to open and close said cover,
• a versible, motor-driven pump,
• a first hydraulic line connecting the first operating space in said cylinder with said reversible pump and a second hydraulic line connecting said reversible pump with said second operating space, said reversible pump supplying hydraulic fluid through said first hydraulic line to said first operating space to cause said piston to move and open said cover or supplying hydraulic fluid through said second hydraulic line to said second operating space to cause said piston to move and close said cover, and
• a manual pump connected to said second hydraulic line for supplying hydraulic fluid to said second operating space and causing said piston to move and close said cover in the event of failure of said reversible pump.