Windshield cleaning device

Claim 1

A LIQUID EJECTING DEVICE COMPRISING A LIQUID SUPPLY CHAMBER, A METERING CHAMBER IN COMMUNICATING RELATION TO SAID SUPPLY CHAMBER TO BE GRAVITY FILLED WITH LIQUID FROM SAID SUPPLY CHAMBER, A VALVE CONNECTION BETWEEN SAID CHAMBERS, A LIQUID DELIVERY CONDUIT EXTENDING FROM SAID METERING CHAMBER, A CHAMBER FOR CONTAINING A PREDETERMINED VOLUME OF COMPRESSED GAS AND INCLUDING GAS INLET MEANS AND GAS OUTLET MEANS, A GAS DELIVERY CONDUIT CONNECTING SAID GAS OUTLET MEANS AND SAID METERING CHAMBER, VALVE MEANS INCLUDING MOVABLE PISTON MEANS MOVABLE TO A DEPRESSED POSITION THEREOF FOR CLOSING SAID GAS OUTLET MEANS AND OPENING SAID GAS INLET MEANS FOR PASSING COMPRESSED GAS INTO SAID GAS CHAMBER VIA SAID GAS INLET MEANS, SAIS PISTON MEANS BEING RESPONSIVE TO THE PRESSURE OF THE GAS WITHIN SAID GAS CHAMBER TO MOVE SAID PISTON MEANS FROM SAID DEPRESSED POSITION THEREOF TO ITS NORMAL ELEVATED POSITION WHEREBY TO CLOSED SAID GAS INLET MEANS AND TO OPEN SAID GAS OUTLET MEANS TO CONNECT THE INTERIOR OF SAID GAS CHAMBER WITH SAID GAS DELIVERY CONDUIT AND TO PASS THE GAS FROM SAID GAS CHAMBER TO SAID METERING CHAMBER, THEREBY ACTUATING SAID VALVED CONNECTION TO ITS CLOSED POSITION AND EJECTING THE LIQUID CONTENTS OF SAID METERING CHAMBER INTO SAID LIQUID DELIVERY CONDUIT, SAID VALVE MEANS FURTHER COMPRISING A CYLINDER COMMUNICATING AT THE LOWER END THEREOF WITH THE INTERIOR OF SAID GAS INLET MEANS AND SAID GAS DELIVERY THEREOF WITH SAID GAS INLET MEANS AND SAID GAS DELIVERY CONDUIT RESPECTIVELY, SAID PISTON MEANS BEING MOVABLE IN SAID CYLINDER AND HAVING AN INVERTED L SHAPED PASSAGE THEREIN COMMUNICATING AT THE LOWER END THEREOF WITH THE LOWER END OF SAID CYLINDER AND AT THE UPPER END THEREOF SELECTIVELY WITH THE SIDE PORTIONS OF SAID CYLINDER IN ACCORDANCE WITH THE POSITION OF SAID PISTON MEANS.