Patent ID: 6581457
Filing Date: 2003-06-24
Classification: G01F

Abstract:
A compound meter assembly for measuring flow within suitable standards of accuracy, said assembly comprising:a housing having an inlet, an outlet and a main flow passageway extending between the inlet and the outlet of the housing for carrying a relatively higher volume flow; the housing also forming at least a portion of a secondary flow passageway for carrying a relatively lower volume flow than the main passageway, said secondary flow passageway having an entrance from the main flow passageway and an exit re-entering the main flow passageway; a high volume flow meter disposed in the main flow passageway for detecting a flow rate of relatively higher volume flows; a low volume flow meter disposed in the secondary flow passageway for detecting a flow rate of relatively lower volume flows; and a flow distributor disposed in the inlet and disposed adjacent to the entrance to the secondary flow passageway, said flow distributor having a central opening for receiving the main flow arid having flow ports disposed around at least a portion of a circumference of said flow distributor for allowing portions of the main flow to flow towards interior walls of the housing such that the flow is better distributed across a cross section of the main passageway to maintain the accuracy of the meter at a crossover region between low flows being metered by the low volume flow meter and high flows being metered by the high volume flow meter.