Lubricant injector for chain conveyor roller bearings

摘要

The injector has a housing inlet for receiving lubricant, and an injector tip for placement on the lubricant fitting. A spring-loaded movable piston, actuated with compressed air, is disposed in the housing, with the injector tip connected to the movable piston. An annular gap communicating with the inlet is provided between the housing and the movable piston, having a discharge side facing the injector tip and provided with a coaxially disposed cylindrical chamber.The movable piston has a bore connecting the annular gap and the cylindrical chamber. A cylindrical body control piston is disposed between the control piston and the injector tip. a spring-loaded feed piston serves to transfer lubricant to the injector tip and is disposed in the cylindrical chamber, with play, so that a transfer passage leads from one side of the feed piston to an opposite side communicating with the injector tip. The cylindrical body has a channel controlled by the control piston for receiving lubricant from the preliminary control chamber