Patent ID: 6810998
Filing Date: 2004-11-02
Classification: F16N

Abstract:
The method of improving the performance of an existing lubrication system which comprises a plurality of injectors each operable through a cycle upon being supplied with lubricant under pressure to deliver a volume of lubricant and upon relief of pressure to recharge, a system for supplying the injectors with lubricant under pressure for delivery of said volume and for venting the injectors for recharging, said method comprisingreplacing one of said injectors with an injector comprising a body having an inlet for lubricant under pressure, an outlet, a measuring chamber for receiving lubricant from the inlet, a piston movable through a stroke in the measuring chamber for the discharge of a measured volume of lubricant from the measuring chamber and thence through the outlet, and a valve responsive to pressure conditions in the inlet for operation of the injector in cycles in each of which the injector starts in a state of repose wherein pressure of lubricant in the inlet is relieved and the measuring chamber is charged with lubricant, progresses through a state wherein lubricant under pressure is delivered to the injector via the inlet for the discharge, and ends in a state for venting the injector to effect recharging of the measuring chamber involving the transmission of lubricant from the inlet to the measuring chamber.