# US 9,005,341 B2 · Sealing device and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,005,341 B2 - Document ID: US9005341B2 - Status: Granted - Kind: B2 - Application number: 13/822,304 - Filed: 2011-09-01 - Published: 2013-07-04 - Granted: 2015-04-14 - Earliest claimed: 2010-09-15 - Assignees: ALSTOM Technology Ltd - Applicants: Anders Erik Hjelmberg - Inventors: Anders Erik Hjelmberg - Web page: https://patentgrep.com/patent/US9005341B2 ## CPC - F16J 15/52: by means of sealing bellows or diaphragms (connection of valves to inflatable elastic bodies B60C29/00) - B01D 46/4272: {Special valve constructions adapted to filters or filter elements} - F16J 15/525: {fixed to a part of a transmission performing a wobbling or a circular translatory movement} - F16J 15/56: Other sealings for reciprocating rods - B01D 2271/02: Gaskets, sealings - Y10T 29/4984: Retaining clearance for motion between assembled parts - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present disclosure relates to a sealing device 20 for a control rod 17, passing through an aperture 15c in a wall 15, wherein the control rod 17 is connected between an actuator 13, placed on one side of the wall, and a controlled entity 9a, placed on the other side of the wall, such that the actuator can control the controlled entity with motion of the control rod. The sealing device 20 includes a packing box 37 through which the control rod 17 passes and a seal 41 which provides a sealing function between the control rod 17 and the packing box 37. The packing box 37 is moveable with the control rod 17 in relation to the wall 15. Wall aperture 15c is sized to allow movement of the control rod 17 within aperture 15c. A flexible member 39 surrounds a portion of control rod 17 and extends between the packing box 37 and the wall 15, in a gastight communication with each. As such, the subject sealing device allows movement of the control rod without compromising the sealing function efficiency thereof. ## Claims ### Claim 1 A sealing device for a control rod passing through an aperture in a wall comprising: the control rod attached between an actuator placed on one side of the wall and a controlled entity placed on the other side of the wall, such that the actuator can control the controlled entity with motion of the control rod, a packing box gas tightly sealed to the control rod with a seal, with the packing box and control rod moveable in relation to the wall; and a flexible member integral to the packing box gas tightly secured to the wall, wherein a play is provided between the aperture in the wall and the control rod, and the packing box includes an opening housing a firm gastight seal between the packing box and the control rod, the gastight seal having at least one sealing ring that provides a seal around the control rod. ### Claim 2 (depends on 1) A sealing device according to claim 1, wherein the flexible member is formed of a pleated material. ### Claim 3 (depends on 1) A sealing device according to claim 1, wherein the flexible member is formed of a flat material. ### Claim 4 (depends on 1) A sealing device according to claim 1, wherein the packing box is placed on an exterior surface of the wall. ### Claim 5 (depends on 1) A sealing device according to claim 1, wherein the packing box is placed on an interior surface of the wall. ### Claim 6 (depends on 1) A sealing device according to claim 1, wherein the aperture is sized for movement of the control rod therein. ### Claim 7 A fabric filter system comprising: a closed space limited by a wall with a sealing device including a packing box gas tightly sealed with a seal to a control rod, with the packing box and control rod moveable in relation to the wall; and a flexible member integral to the packing box gas tightly secured to the wall enabling a controlled entity inside the closed space to be controlled by an actuator outside the closed space by the control rod therebetween, wherein a play is provided between the aperture in the wall and the control rod, and the packing box includes an opening housing a firm gastight seal between the packing box and the control rod, the gastight seal having at least one sealing ring that provides a seal around the control rod. ### Claim 8 (depends on 7) The fabric filter system according to claim 7, wherein the controlled entity is a damper.