Patent ID: 7363940

Claim:
An orifice expansion device for bi-directionally flowing pressurized fluid, said device comprising in combination: a. a generally cylindrical flow control distributor housing having a forward distributor end with a nozzle face and at least one port and an associated duct, said housing also having a threaded rearward coupling end, having an annular outer stepped portion, and a central axial cylindrical fluid passageway extending from a forward passageway end, that is in communication with said at least one port, to an open rear passageway, via an intermediate, annular, frusto-conical valve seat; b. a generally cylindrical restrictor insert with a central axial through bore having a cylindrical first bore portion, coupled to a cylindrical second bore portion via an annular frusto-conical joinder bore portion, and a cylindrical third bore portion, with said bores defining a central bore cavity, said restrictor insert also having a cylindrical outer surface, having an outter leading portion with multiple steps and a leading frusto-conical front end surface, separated from said multiple steps via an intermediate peripheral groove, said restrictor insert further including a trailing portion having a shoulder portion and an annular end surface, said restrictor insert being adapted for slip insertion into said housing central fluid passageway; c. a generally cylindrical restrictive member, with an axial through bore, includes an annular front end portion having a frusto-conical front end surface with an adjoining outer radius, said front end portion merging into an annular rear end portion, said restrictive member being adapted for insertion into, and free axial reciprocal movement within, said restrictor insert central bore cavity; d. a generally annular adaptor having a leading flange end and a trailing tubular end configured for connection with said pressurized fluid, said adaptor also including, attached at a flange end inner cylindrical surface, a flange end of a filter member, said adaptor leading flange sealingly abutting at least said shoulder portion of said restrictor insert trailing portion; and e. a threaded fastening member surrounding said adaptor leading flange and adapted for threaded engagement with said distributor housing rearward coupling end.