Centralized lubrication system

Claim 1

A CENTRALIZED LUBRICATING SYSTEM FOR A PLURALITY OF MACHINE UNITS HAVING A LUBRICANT SUPPLY, A LUBRICANT PRESSURE PUMP, A PRIMARY HIGH PRESSURE LUBRICANT DISTRIBUTING SYSTEM COMPRISING A PLURALITY OF DISTRIBUTING PIPE LINES CONNECTED WITH SAID PUMP, A DEVICE CONNECTED INTO SAID DISTRIBUTING PIPE LINES ACTING WHEN ACTUATED TO REDUCE THE PRESSURE IN SAID PIPE LINES AND A LUBRICANT INJECTION VALVE AT THE TERMINAL END OF EACH SAID DISTRIBUTING PIPE LINE HAVING LUBRICANT EJECTION AND RECHARGE MECHANISM OPERATED BY SUCCESSIVE PRESSURE SURGES FROM SUPPLY FOR THE EJECTION OF SUCCESSIVE METERED AMOUNTS OF LUBRICANT AND TO BE RECHARGED UPON REDUCTION OF SAID PRESSURE, A SECONDARY CLOSED PRESSURE INJECTED LUBRICANT DISTRIBUTING SYSTEM CONNECTED WITH EACH SAID INJECTION VALVE COMPRISING A BRANCH LINE FROM SAID INJECTION VALVE HAVING A MANIFOLD THEREIN, A PLURALITY OF LINES FROM SAID MANIFOLD TO POINTS OF LUBRICATION, EACH SAID LINE INCORPORATING THEREIN A SELF-CONTAINED FLOW CONTROL FITTING COMPRISING A METERING ORIFICE AND A CHECK VALVE, AND OPERATING MEANS FOR SAID SYSTEM COMPRISING MEANS FOR RECURRENTLY OPERATING SAID PUMP TO BUILD PRESSURE OF SAID LUBRICANT IN SAID PRIMARY LUBRICANT DISTRIBUTING SYSTEM, AND THEREAFTER ACTUATING SAID DEVICE FOR REDUCING SAID PRESSURE IN SAID PRIMARY HIGH PRESSURE LUBRICANT SYSTEM TO PRODUCE RECURRENT PRESSURE SURGES IN SAID LUBRICANT DISTRIBUTING SYSTEM.