# US 4,400,138 A · Multiple jet eductor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,400,138 A - Document ID: US4400138A - Status: Granted - Kind: A - Application number: 06/312,522 - Filed: 1981-10-19 - Granted: 1983-08-23 - Earliest claimed: 1981-10-19 - Inventors: William F. Baer - Web page: https://patentgrep.com/patent/US4400138A ## CPC - B01F 25/314: wherein additional components are introduced at the circumference of the conduit - F04F 5/10: displacing liquids, e.g. containing solids, or liquids and elastic fluids - F04F 5/466: {with a plurality of nozzles arranged in parallel} - Y10T 29/49236: Fluid pump or compressor making - Y10T 29/49432: Nozzle making - Y10T 29/4987: Elastic joining of parts - B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06) - F04F: PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED {(evacuating by sorption F04B)}; SIPHONS {(conveying materials in bulk by flows of gas, liquid of foam B65G53/00)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An improved multiple jet eductor assembly is described consisting of two parts: (1) a manifold ring with a pressurized water inlet and a plurality, preferably four, of radially-spaced, forwardly- and convergingly-directed jet nozzles, and (2) a tube having a bell end, near the bell end at a fixed axial distance therefrom a number of peripheral bosses radially disposed, equal in number to the plurality of nozzles, each boss containing a forwardly- and convergingly- directed porthole adapted to snugly receive a corresponding one of the jet nozzles. The eductor is assembled by forced simple coaxial translational motion of part 1 over the bell end of part 2, the nozzles engaging and entering the portholes with transitory snake-like flexure to reach a "home position" whereat the nozzles revert to their original, free of stress or distortion, molded, straight configuration, utilizing the unique memory property of viscoelastic materials, and securing part 1 to part 2 proximally in the "home position". ## Claims ### Claim 1 In a two part multiple jet pump of which a first part consists essentially of a manifold ring which is provided with a pressurized water inlet and a first plurality of radially spaced, forwardly, and convergingly, directed jet nozzles, a second part consists essentially of a tube having a bell end, said second part being provided, proximally to and at a fixed axial distance from the bell end, with a second plurality of radially disposed bosses equal in number to said first plurality, each boss containing a forwardly, and convergingly, directed porthole adapted to snugly receive a corresponding one of said jet nozzles wherein high pressure water passes through said jet nozzles and into said tube whereat said high pressure water entrains a pumped fluid and develops a low pressure, the improvement consisting of assembling the jet pump by forced simple coaxial translation motion of said first part over said bell end of said second part, all of said jet nozzles simultaneously engaging and entering corresponding ones of said portholes with transitory snake-like flexure in an intermediate position and finally penetrating to a "home position" whereat said jet nozzles revert to their original, free of stress or distortion, molded, straight configuration, and securing said first part to said second part proximally in said "home position" by suitable means. ### Claim 2 (depends on 1) The jet pump according to claim 1 wherein the number of said first plurality is four. ### Claim 3 (depends on 1) The jet pump according to claim 1 wherein the material of construction is a viscoelastic polymer. ### Claim 4 (depends on 3) The jet pump according to claim 3 wherein the viscoelastic polymer is a thermoplastic polymer. ### Claim 5 (depends on 3) The jet pump according to claim 3 wherein the viscoelastic polymer is a thermoset polymer. ### Claim 6 (depends on 3) The jet pump according to claim 3 wherein the viscoelastic polymer is selected from the group consisting of polyethylene, polypropylene, nylon, polyester and polyvinyl chloride. ### Claim 7 (depends on 6) The jet pump according to claim 6 wherein the viscoelastic polymer is cross-linked polyethylene. ### Claim 8 (depends on 7) The jet pump according to claim 7 wherein the cross-linked polyethylene is one selected from the group consisting of MARLEX CL 50 and MARLEX CL 100 manufactured by Phillips Petroleum Company. ### Claim 9 (depends on 1) The jet pump according to claim 1 wherein said first and second parts are monolithic parts. ### Claim 10 (depends on 9) The jet pump according to claim 9 wherein any one of said jet nozzles is viscoelastic to the extent that, after having been stressed in cantileverflexion for 1 second to a displacement distance as measured at the tip of said jet nozzle equal to the shank length of said jet nozzle times 0.125, said jet nozzle will spontaneously revert upon relief of said stress to its original straight, molded configuration within 24 hours. ### Claim 11 (depends on 10) The jet pump according to claim 10 wherein said manifold ring is provided with one or more optional hose stubs. ### Claim 12 (depends on 11) The jet pump according to claim 11 wherein the pressure water inlet to said manifold ring is stepped to receive hoses of different diameters. ### Claim 13 (depends on 12) The jet pump according to claim 12 wherein the inside diameter of said bell end is provided with thread lugs to threadably engage a spiral wound suction hose. ### Claim 14 (depends on 13) The jet pump according to claim 13 wherein means is provided for fine adjustment of the performance by limited translational advancement or retraction of the jet nozzles in the portholes from "home position" to alter their angle of convergence and securing thereat.