Spraying device having restricted orifice and expansion chamber construction

Claim 1

A DEVICE FOR MIXING A LIQUID TREATING CHEMICAL INTO A STREAM OF WATER UNDER PRESSURE AND DISCHARGING THE MIXTURE AS A SPRAY COMPRISING A SPRAYER BODY HAVING A DISCHARGE END THROUGH WHICH THE STREAM OF WATER WITH SAID LIQUID TREATING CHEMICAL MIXED THEREIN ISSUES AND AN INLET END ARRANGED TO BE COMMUNICATED WITH A SOURCE OF WATER UNDER PRESSURE, MEANS WITHIN SAID BODY BETWEEN SAID DISCHARGE END AND SAID INLET END DEFINING A RESTRICTED PASSAGE, MEANS WITHIN SAID BODY DEFINING A MIXING CHAMBER OF GREATER CROSS-SECTIONAL AREA THAN SAID RESTRICTED PASSAGE COMMUNICATING DIRECTLY WITH SAID RESTRICTED PASSAGE BETWEEN THE LATTER AND SAID DISCHARGE END FOR CREATING A SUCTION IN RESPONSE TO THE PASSAGE OF WATER UNDER PRESSURE FROM SAID RESTRICTED PASSAGE THERETHROUGH, MEANS DEFINING A LIQUID TREATING CHEMICAL PASSAGE COMMUNICATING WITH SAID MIXING CHAMBER FOR DIRECTING A STREAM OF LIQUID TREATING CHEMICAL FROM A SOURCE OF SUCH LIQUID TREATING CHEMICAL INTO SAID MIXING CHAMBER IN RESPONSE TO THE CREATION OF A SUCTION THEREIN, AND MEANS WITHIN SAID BODY BETWEEN SAID RESTRICTED PASSAGE AND SAID INLET END DEFINING A RESTRICTED ORIFICE AND AN EXPANSION CHAMBER OF A CROSS-SECTIONAL CONFIGURATION GREATER THAN SAID RESTRICTED ORIFICE AND SAID RESTRICTED PASSAGE COMMUNICATING DIRECTLY BETWEEN SAID RESTRICTED ORIFICE AND SAID RESTRICTED PASSAGE FOR PREVENTING ANY SUBSTANTIAL INCREASE IN THE WATER FLOW VELOCITY IN SAID RESTRICTED PASSAGE IN RESPONSE TO AN INCREASE IN THE PRESSURE OF SAID WATER SOURCE ABOVE A PREDETERMINED VALUE SUFFICIENT TO CREATE SAID SUCTION WITHIN SAID MIXING CHAMBER BY PREVENTING ANY SUBSTANTIAL INCREASE IN EITHER THE VELOCITY ENERGY OF THE WATER PASSING FROM SAID ORIFICE THROUGH SAID EXPANSION CHAMBER OR IN THE PRESSURE ENERGY OF THE WATER IN SAID EXPANSION CHAMBER IN RESPONSE TO SUCH INCREASE IN THE PRESSURE OF SAID WATER SOURCE.

Claim 2

A DEVICE FOR MIXING A LIQUID TREATING CHEMICAL INTO A STREAM OF WATER UNDER PRESSURE AND DISCHARGING THE MIXTURE AS A SPRAY COMPRISING A SPRAYER BODY HAVING A DISCHARGE END THROUGH WHICH THE STREAM OF WATER WITH SAID LIQUID TREATING CHEMICAL MIXED THEREIN ISSUES AND AN INLET END ARRANGED TO BE COMMUNICATED WITH A SOURCE OF WATER UNDER PRESSURE, MEANS WITHIN SAID BODY BETWEEN SAID DISCHARGE END AND SAID INLET END DEFINING A RESTRICTED PASSAGE, MEANS WITHIN SAID BODY DEFINING A MIXING CHAMBER OF GREATER CROSS-SECTIONAL AREA THAN SAID RESTRICTED PASSAGE COMMUNICATING DIRECTLY WITH SAID RESTRICTED PASSAGE BETWEEN THE LATTER AND SAID DISCHARGE END FOR CREATING A SUCTION IN RESPONSE TO THE PASSAGE OF WATER UNDER PRESSURE FROM SAID RESTRICTED PASSAGE THERETHROUGH, MEANS DEFINING A LIQUID TREATING CHEMICAL PASSAGE COMMUNICATING WITH SAID MIXING CHAMBER FOR DIRECTING A STREAM OF LIQUID TREATING CHEMICAL FROM A SOURCE OF SUCH LIQUID TREATING CHEMICAL INTO SAID MIXING CHAMBER IN RESPONSE TO THE CREATION OF A SUCTION THEREIN, AND MEANS WITHIN SAID BODY BETWEEN SAID RESTRICTED PASSAGE AND SAID INLET END DEFINING A RESTRICTED ORIFICE AND AN EXPANSION CHAMBER OF A CROSS-SECTIONAL CONFIGURATION GREATER THAN SAID RESTRICTED ORIFICE AND SAID RESTRICTED PASSAGE COMMUNICATING DIRECTLY BETWEEN SAID RESTRICTED ORIFICE AND SAID RESTRICTED PASSAGE FOR PREVENTING ANY SUBSTANTIAL INCREASE IN THE WATER FLOW VELOCITY IN SAID RESTRICTED PASSAGE IN RESPONSE TO AN INCREASE IN THE PRESSURE OF SAID WATER SOURCE ABOVE A PREDETERMINED VALUE SUFFICIENT TO CREATE SAID SUCTION WITHIN SAID MIXING CHAMBER BY PREVENTING ANY SUBSTANTIAL INCREASE IN EITHER THE VELOCITY ENERGY OF THE WATER PASSING FROM SAID ORIFICE THROUGH SAID EXPANSION CHAMBER OR IN THE PRESSURE ENERGY OF THE WATER IN SAID EXPANSION CHAMBER IN RESPONSE TO SUCH INCREASE IN THE PRESSURE OF SAID WATER SOURCE.