Pneumatic grease applicator

A pneumatic grease applicator, comprising:

• a grease receptacle formed by a side wall having a top opening and a closed bottom;
• a bearing retainer movably received in the receptacle through the top opening and having a top face forming a recess adapted to receive an object on which grease is to be applied, an axle mounted in the recess and having a threaded upper end section, the axle defining a central bore and a plurality of grease passages in communication with the central bore, at least one sealing member being mounted on a circumference of the retainer to form grease tight engagement with the side wall of the receptacle;
• a presser movably received in the receptacle through the top opening and located above the retainer, the presser having a low portion corresponding to the recess of the retainer, the lower portion defining a hole movably fit over the axle and forming internal threading to engage the threaded end section of the axle, at least one sealing member being mounted to a circumference of the presser to form grease tight engagement with the side wall of the receptacle, the presser having a top portion forming a cavity in which a nozzle adapted to couple a grease gun is received and fixed, the nozzle being in fluid communication with the hole of the lower portion of the presser, and thus the central bore of the axle fit into the hole of the lower portion of the presser, an air vent being defined in the presser;
• a nozzle mounted to a channel defined in the bottom of the receptacle and in communication with the first space, the nozzle being adapted to connect with a pneumatically driven grease supply source to forcibly feed grease into the first space through the nozzle and the channel and to force the grease into the second space through the grease passages to flood over the object and thus applying grease to the object.