2015252765 A1 abstract an injection nozzle for use in injecting lubricating oil into cylinders in large engines is provided the nozzle is adapted for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with a nozzle outlet at the inner end of the nozzle rod the nozzle rod includes a cylindrical valve seat boring with a displaceable valve body having a cylindrical sealing face which interacts with the cylindrical valve seat boring of the nozzle rod the valve body biased by a spring for effective closing of the valve the valve body is formed by a cylindrical rod having a turned recess in the cylindrical sealing face of the valve body the turned recess is arranged at the inner end of the valve body with parts of the cylindrical sealing face of the valve body at each side of the turned recess application_number US 201314431083 A description fig1 shows an embodiment of the injection nozzle where possible leak oil is conducted into the cylinder the injection nozzle includes a nozzle rod divided into an inner part 1 which contains a valve body 3 and an outer part extending through a cylinder wall 102 see fig1 and formed by an inner tube 5 and an outer tube 6 alternatively the nozzle rod can be made in one piece 20 u2014 bevelled sides of valve body for forming a pressurised oil supply duct 21 u2014 valve seat boring interacting with valve body sealing faces 3 a 3.