Lubrication indicator

Claim 1

A LUBRICATOR COMPRISING, IN COMBINATION: A LUBRICATION VALVE FOR PERIODICALLY SUPPLYING A MEASURED QUANTITY OF LUBRICANT TO A PART OF AN OPERATING STRUCTURE, AND AN INDICATOR FOR INDICATING PROPER OPERATION OF SAID LUBRICATION VALVE, SAID LUBRICATION VALVE COMPRISING: A VALVE BODY HAVING A VALVING PISTON CHAMBER THEREIN, SAID VALVE BODY FURTHER HAVING AT LEAST ONE FLUID INLET PASSAGE AND ONE FLUID OUTLET PASSAGE, SAID FLUID INLET AND OUTLET PASSAGES BEING IN COMMUNICATION WITH SAID VALVING PISTON CHAMBER, A VALVING PISTON MEMBER MOUNTED FOR RECIPROCATION WITHIN SAID VALVING PISTON CHAMBER, SAID VALVE BODY FURTHER HAVING A METERING PISTON CHAMBER IN COMMUNICATION WITH SAID VALVING PISTON CHAMBER BY A PLURALITY OF PASSAGEWAYS, A METERING PISTON MEMBER MOUNTED FOR RECIPROCATION BETWEEN FIRST AND SECOND POSITIONS WITHIN THE METERING PISTON CHAMBER IN RESPONSE TO LUBRICANT FLOW THROUGH THE PASSAGEWAYS IN THE VALVE BODY, SAID METERING PISTON CHAMBER BEING CLOSED AT ONE END THEREOF BY SAID INDICATOR, SAID INDICATOR COMPRISING: A BODY MEMBER HAVING AN INTEGRAL CLOSED BASE PORTION AT ONE END THEREOF AND A CHAMBER THEREIN, SAID CHAMBER EXTENDING INTO SAID BODY MEMBER AND TERMINATING AT A LOCATION THEREWITH WHICH IS ADJACENT SAID CLOSED BASE PORTION, SAID CLOSED PORTION BEING SO CONSTITUTED AND ARRANGED AS TO SEALINGLY CLOSE SAID METERING PISTON CHAMBER UPON ASSEMBLY OF SAID BODY MEMBER TO SAID VALVE BODY, A SLIDER LONGITUDINALLY RECIPROCABLY DISPOSED WITHIN THE CHAMBER FOR MOVEMENT BETWEEN A PLURALITY OF POSITIONS FOR INDICATING LUBRICANT FLOW THROUGH THE LUBRICATION VALVE, SAID METERING PISTON MEMBER HAVING AN END PORTION WHICH DEFINES MEANS FOR INFLUENCING THE MOVEMENT OF THE SLIDER IN ONE DIRECTION TO ONE OF THE INDICATING POSITIONS WHEN SAID METERING PISTON MEMBER IS IN THE FIRST POSITION, AND MEANS DISPOSED WITHIN THE CHAMBER OPERATIVELY ASSOCIATED WITH THE SLIDER TO URGE THE SLIDER IN A DIRECTION OPPOSED TO THE ONE DIRECTION AND TO THE OTHER INDICATING POSITION WHEN SAID METERING PISTON MEMBER IS IN THE SECOND POSITION.