# US 9,873,072 B2 · Frame assembly for an air filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,873,072 B2 - Document ID: US9873072B2 - Status: Granted - Kind: B2 - Application number: 14/778,474 - Filed: 2013-03-19 - Published: 2016-03-10 - Granted: 2018-01-23 - Earliest claimed: 2013-03-19 - Assignees: Camfil AB - Applicants: Camfil AB - Inventors: Pascal National - Web page: https://patentgrep.com/patent/US9873072B2 ## CPC - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - B01D 2265/026: with means for avoiding false mounting - B01D 2265/028: Snap, latch or clip connecting means - B01D 2273/14: Filters which are moved between two or more positions, e.g. by turning, pushing - 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 There is provided a frame assembly 200 adapted for installation in a filter housing of an air handling system. The frame assembly is arranged having a frame 210 which is adapted to receive a filter unit of a predetermined size. The frame assembly further comprises a clamping mechanism 230 arrange for clamping the filter unit. An actuator 231 of the clamping mechanism is arranged at a front member 211 of the frame and is operable between an open and a closed position while activating the clamping mechanism to clamp the filter unit. An actuator element 232 facing a back member 212 of the frame is arranged such that a free distance between the actuator element and the back member during operation of the actuator corresponds to the predetermined filter unit size, thereby enabling operation of the actuator only if an inserted filter unit abuts the back member of the frame. ## Claims ### Claim 1 A frame assembly adapted for installation in a filter housing, the frame assembly comprising: a frame adapted to receive a filter unit of a predetermined size; and at least one clamping mechanism for clamping said filter unit, the at least one clamping mechanism comprising an actuator arranged at a front member of said frame, wherein said actuator is operable between an open position and a closed position while activating the at least one clamping mechanism to clamp said filter unit; wherein said actuator is arranged having at least one actuator element facing a back member of the frame, and wherein during operation of said actuator, a free distance “D” between the at least one actuator element and the back member of the frame corresponds to an in-depth size of said predetermined filter unit size, thereby enabling operation of the actuator between the open position and the closed position only if the inserted filter unit abuts said back member of the frame. ### Claim 2 (depends on 1) A frame assembly according to claim 1, wherein said at least one actuator element is a protruding portion. ### Claim 3 (depends on 1) A frame assembly according to claim 1, wherein said actuator is a lever arranged to be pivotable between said open and closed position. ### Claim 4 (depends on 2) A frame assembly according to claim 2, wherein said front member is provided with at least one opening for receiving said actuator element or allowing free passage of said actuator element when said actuator is in said open position or said closed position. ### Claim 5 (depends on 1) A frame assembly according claim 1, wherein the at least one clamping mechanism is a spring loaded clamping device. ### Claim 6 (depends on 1) A frame assembly according to claim 1, wherein the at least one clamping mechanism comprises a spring element, and an excenter mechanism arranged for displacing the frame when activating the at least one clamping mechanism, thereby providing clamping of said filter unit against an inner wall of said filter housing. ### Claim 7 (depends on 1) A frame assembly according to claim 1, wherein the at least one clamping mechanism comprises a spring element, and a rotatable shaft coupled to said actuator and to said spring element. ### Claim 8 (depends on 1) A frame assembly according to claim 1, wherein said actuator is U-shaped. ### Claim 9 (depends on 1) A frame assembly according to claim 1, wherein said back member, and optionally side members of said frame, comprises respective flange portions for guiding of said filter unit. ### Claim 10 (depends on 1) An air handling assembly, comprising: a filter housing; and a frame assembly according to claim 1 arranged in a compartment of said filter housing. ### Claim 11 (depends on 10) An air handling assembly according to claim 10, further comprising a door for sealing an access opening of said compartment, wherein said door is provided with a blocking element preventing closing of said door if said actuator of the at least one clamping mechanism is not in a closed position.