# US 2014/0150387 A1 · Circular cylinder air filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150387 A1 - Document ID: US20140150387A1 - Status: Published application - Kind: A1 - Application number: 13/691,849 - Filed: 2012-12-03 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: Ye Siang Enterprise Co., Ltd. - Applicants: Ye Siang Enterprise Co., Ltd. - Inventors: Shih-Chieh CHUANG - Web page: https://patentgrep.com/patent/US20140150387A1 ## CPC - B01D 46/64: arranged concentrically or coaxially - B01D 46/24: Particle separators, e.g. dust precipitators, using rigid hollow filter bodies - B01D 2265/06: Details of supporting structures for filtering material, e.g. cores - 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) ## Abstract A circular cylinder air filter includes an inner cylindrical frame, an outer cylindrical frame, a circular disc, a bonding base and a non-woven fabric cover. The outer cylindrical frame is coaxially arranged around the inner cylindrical frame. The circular disc is fastened to a first end of the inner cylindrical frame and the outer cylindrical frame. The bonding, base is fastened to an opposite second end of the inner cylindrical frame and the outer cylindrical frame. A first opening of the bonding base communicates with a first hollow region between the inner cylindrical frame and the outer cylindrical frame. A second opening of the bonding base communicates with a second hollow region within the inner cylindrical frame. The air filter medium is filled into the first hollow region through the first opening. The fabric cover encloses the outer cylindrical frame circular disc and bonding base to expose the second opening. ## Claims ### Claim 1 A circular cylinder air filter comprising: a hollow inner cylindrical frame having a plurality of first filter webs; a hollow outer cylindrical frame being coaxially disposed around the inner cylindrical frame and having a plurality of second filter webs; a circular disc fastened to a first end of the inner cylindrical frame and the outer cylindrical frame; a bonding base fastened to an opposite second end of the inner cylindrical frame and the outer cylindrical frame, the bonding base having a first opening and a second opening, the first opening communicates with a first hollow region between the inner cylindrical frame and the outer cylindrical frame, the second opening communicates with a second hollow region within the inner cylindrical frame; a plurality of air filter medium being filled into the first hollow region through the first opening, wherein the air filter medium has a dimension that is greater than any filter hole of the first filter webs and the second filter webs; and a non-woven fabric cover enclosing the outer cylindrical frame, the circular disc and the bonding base to expose the second opening, airflows to be filtered being introduced into the second hollow region through the second opening, filtered via the air filter medium within the first hollow region and finally filtered via the non-woven fabric cover. ### Claim 2 (depends on 1) The circular cylinder air filter of claim 1, wherein the non-woven fabric cover is a fabric cover made from polypropylene fiber. ### Claim 3 (depends on 1) The circular cylinder air filter of claim 1, wherein the non-woven fabric cover is a fabric cover made from polyethylene fiber. ### Claim 4 (depends on 1) The circular cylinder air filter of claim 1, wherein the first hollow region has a thickness ranging from about 10 mm to about 25 mm. ### Claim 5 (depends on 4) The circular cylinder air filter of claim 4, wherein the first hollow region has a thickness of 22 mm. ### Claim 6 (depends on 5) The circular cylinder air filter of claim 5, wherein the air filter medium has a concentration of greater than 12 percent sodium permanganate by weight. ### Claim 7 (depends on 4) The circular cylinder air filter of claim 4, wherein the first hollow region has a thickness of 12 mm. ### Claim 8 (depends on 7) The circular cylinder air filter of claim 7, wherein the air filter medium has a concentration of greater than 12 percent sodium permanganate by weight. ### Claim 9 (depends on 1) The circular cylinder air filter of claim 1, wherein the bonding base is a disc-shaped member, which has three positioning pins disposed at a rim thereof. ### Claim 10 (depends on 9) The circular cylinder air filter of claim 9, wherein the three positioning pins are symmetrical as to a center of the bonding base. ### Claim 11 (depends on 10) The circular cylinder air filter of claim 10, wherein any adjacent two of the three positioning pins and the center of the bonding base forms two virtual lines, which has an included angle of 120 degrees therebetween.