Double pattern metering valve

Claim 1

A DOUBLE PATTERN METERING VALVE COMPRISING: A HOUSING HAVING A FLUID PASSAGEWAY EXTENDING THERETHROUGH; SAID PASSAGE COMMUNICATING WITH FIRST COUNTERBORED PORTIONS AT OPPOSITE ENDS OF SAID HOUSING AND THEREBY FOMING AN ANNULAR SEATING LIP; SECOND COUNTERBOARED PORTIONS ADJACENT TO AND COAXIAL WITH SAID FIRST COUNTERBOARD PORTIONS WITH A RADIALLY EXTENDING SHOULDER FORMED AT THE JUNCTURE OF SAID COUNTERBOARED PORTIONS; INLET MEANS COMMUNICATING WITH ONE OF SAID FIRST COUNTERBORED PORTIONS AND OUTLET MEANS COMMUNICATING WITH THE OTHER OF SAID FIRST COUNTERBOARED PORTIONS; A BONNET ASSEMBLY THREADEDLY RECEIVED IN EACH OF SAID SECOND COUNTERBORED PORTIONS; SEAL MEANS INTERPOSED BETWEEN THE END OF EACH OF SAID BONNET ASSEMBLIES AND THE RESPECTIVE SHOULDER; A CENTAL BORE IN EACH OF SAID BONNET ASSEMBLIES HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE DIAMETER OF SAID FIRST COUNTERBORED PORTIONS WHEREBY SAID CENTRAL BORE IS COAXIALLY ALIGNED WITH AND FORMS AN EXTENSION OF SAID FIRST COUNTERBORED PORTION; ELONGATED STEM MEANS IN EACH OF SAID CENTRAL BORES; EACH OF SAID STEM MEANS INCLUDING A SLENDER ELONGATED CONICAL NEEDLE MEMBER ATTACHED THERETO WITH THE FREE END OF SAID NEEDLE EXTENDING THROUGH SAID SEATING LIP INTO SAID FLUID PASSAGE; AND ACTUATING MEANS ASSOCIATED WITH EACH OF SAID STEM MEANS OPERABLE TO RECIPROCATE SAID STEM MEANS IN SAID CENTRAL BORE WHEREBY THE PENETRATION OF SAID NEEDLE MEMBER IN SAID FLUID PASSAGE MAY BE VARIED.