# US 2019/0168153 A1 · Vacuum pump and array thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168153 A1 - Document ID: US20190168153A1 - Status: Published application - Kind: A1 - Application number: 16/324,293 - Filed: 2017-07-03 - Published: 2019-06-06 - Earliest claimed: 2016-09-01 - Assignees: Vtec Co., Ltd. - Applicants: Vtec Co., Ltd. - Inventors: Ho-Young CHO - Web page: https://patentgrep.com/patent/US20190168153A1 ## CPC - B01D 46/71: with pressurised gas, e.g. pulsed air - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - F04F 5/20: for evacuating - F04F 5/44: Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42 - F04F 5/466: {with a plurality of nozzles arranged in parallel} - F04F 5/52: of evacuating pumps - F04F 5/54: Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type - F05B 2260/601: using an ejector or a jet pump - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - 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)} - F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G ## Abstract Disclosed is a compact vacuum pump including a housing having an internal vacuum chamber, an ejector pump axially mounted in the vacuum chamber, and an air filter coaxially mounted on the ejector pump. The housing has two separate compressed air supply lines one of which is a vacuum creation line extending to the inlet port of the ejector pump via a first supply line and the other of which is a vacuum release line extending to a gap between the ejector pump and the air filter via a second supply line. The vacuum pump is of a coaxial arrangement type and has a vacuum release function and a filter cleaning function. ## Claims ### Claim 1 A vacuum pump comprising: a housing (20) having an internal vacuum chamber (21) and a side-mounted suction port (27) extending to the vacuum chamber (21); an ejector pump (30) mounted to axially extend in the vacuum chamber (21); and an air filter (40) coaxially arranged on an outer surface of the ejector pump (30), wherein the ejector pump (30) has an air hole 33 formed in a side wall thereof to communicate with the vacuum chamber (21), a first end serving as an inlet port (31), and a second end serving as an outlet port (32), the air filter (40) is a porous tubular filter, and the housing (20) has, as two separate compressed air supply lines, a vacuum creation line extending to the inlet port (31) via a first supply line (22) and a vacuum release line extending to a gap between the ejector pump (30) and the air filter (40) via a second supply line (23), wherein the air filter (40) includes a tubular filter body (41) and a rib-connecting reinforcing member (42) provided on an outer surface of the tubular filter body (41) to support a load externally applied to the air filter (40), the reinforcing member (42) includes an annular inner protrusion (43) protruding toward the outer surface of the inlet port (31) of the ejector pump (30) and a hole (44) extending through the inner protrusion (43), and the vacuum release line extends to the gap (24) via the second supply line (23) and the hole (44). ### Claim 2 (depends on 1) The vacuum pump according to claim 1, further comprising: a hollow closure member coupled to an opening of the housing to receive an outlet port side end of the ejector pump, thereby axially pressing and fixing the ejector pump disposed in the vacuum chamber. ### Claim 3 (depends on 2) The vacuum pump according to claim 2, wherein the closure member (50) is a silencer. ### Claim 4 (canceled) ### Claim 5 (depends on 1) The vacuum pump according to claim 1, wherein the ejector pump (30) includes an annular stopper (34) disposed on the outer surface of the inlet port (31) and corresponding to the inner protrusion (43) of the air filter (40). ### Claim 6 (depends on 1) The vacuum pump according to claim 1, wherein the housing (20) is provided with one or more transparent windows (29) formed through the side wall thereof to allow a state of the air filter (40) to be visually checked from outside. ### Claim 7 (depends on 1) The vacuum pump according to claim 1, wherein the air filter is fixedly mounted on the outer surface of the ejector pump (30) in such a manner that both ends of the reinforcing member (42) are pressed against the inlet port (31) and the outlet port (32) of the ejector pump (30), respectively. ### Claim 8 (depends on 1) A vacuum pump array (10) comprising: two or more vacuum pumps according to claim 1, the vacuum pumps being arranged in parallel and accommodated in an integrated housing (20), wherein the suction port (27) of each of the vacuum pumps is connected to communicate with the vacuum chamber (21) of an adjacent vacuum pump of the vacuum pumps, the first supply line (22) and the second supply line (23) of each of the vacuum pumps (30) are connected to the first supply line (22) and the second supply line (23) of the adjacent vacuum pump (30), respectively.