# US 2019/0316651 A1 · Rotating three way valve for switchable air springs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0316651 A1 - Document ID: US20190316651A1 - Status: Published application - Kind: A1 - Application number: 15/954,572 - Filed: 2018-04-16 - Published: 2019-10-17 - Earliest claimed: 2018-04-16 - Assignees: Beijingwest Industries Co., Ltd. - Applicants: Beijingwest Industries Co., Ltd. - Inventors: Benoit Prevot; Dominique Fanelli; Jocelyn Marchand - Web page: https://patentgrep.com/patent/US20190316651A1 ## CPC - F16F 9/50: Special means providing automatic damping adjustment, {i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs}(F16F9/53 takes precedence); {Special means providing self-adjustment of spring characteristics} - F16K 11/076: with sealing faces shaped as surfaces of solids of revolution - F16F 9/049: {multi-chamber units (F16F9/0472, F16F9/05 take precedence)} - F16F 9/05: the flexible wall being of the rolling diaphragm type - F16F 9/325: {for attachment of valve units} - F16F 9/341: {comprising noise-reducing or like features, e.g. screens (F16F9/3415 takes precedence)} - F16F 9/462: {Rotary actuation means} - F16F 2230/06: Fluid filling or discharging - F16F 2232/08: Linear - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} ## Abstract A valve assembly for an air spring includes a body having an opened end disposed in communication with a first tank and a closed end. The body defines a cavity separated by a divider into an upper and a lower portion. The body defines at least one upper orifice in communication with the cavity and a second tank; and at least one lower orifice in communication with the cavity and a third tank. An actuator is disposed in communication with the first, the second, and the third tank. The actuator is rotatable from a first position wherein the actuator is in communication with the first tank alone to a second position allowing communication between the first and the second tank, a third position allowing communication between the first and the third tank, and a fourth position allowing communication between the first, the second, and the third tank. ## Claims ### Claim 1 A valve assembly for an air spring comprising: a body disposed on a body axis extending between an opened end disposed in fluid communication with a first tank and a closed end and defining a cavity extending therebetween; a divider disposed in said cavity separating said cavity into an upper portion between said opened end and said divider and a lower portion between said closed end and said divider; said body defining at least two orifices including at least one upper orifice in fluid communication with said cavity and a second tank and at least one lower orifice axially spaced from said at least one upper orifice in fluid communication with said cavity and a third tank; and an actuator disposed in said cavity of said body and rotatable along said body axis in fluid communication with the first tank and the second tank and the third tank and movable from a first position with said actuator being in fluid communication with the first tank alone to a second position allowing fluid communication between the first tank and the second tank and a third position allowing fluid communication between the first tank and the third tank and a fourth position allowing fluid communication between the first tank and the second tank and the third tank. ### Claim 2 (depends on 1) The valve assembly as set forth in claim 1 wherein said actuator includes a valve member disposed in said upper portion and defining a conduit disposed in fluid communication with the first tank to define said first position and being rotatable from said first position to said second position and said third position and said fourth position. ### Claim 3 (depends on 2) The valve assembly as set forth in claim 2 wherein said valve member defines at least two slots including at least one upper slot spaced from said opened end and in fluid communication with said conduit and at least one lower slot axially spaced from said at least one upper slot and in fluid communication with said conduit whereby said valve member is rotatable from said first position to said second position with said at least one upper slot being aligned with said at least one upper orifice to allow fluid communication between the first tank and the second tank, to said third position with said at least one lower slot being aligned with said at least one lower orifice to allow fluid communication between the first tank and the third tank, and to said fourth position with said at least one upper slot being aligned with said at least one upper orifice and said at least one lower slot being aligned with said at least one lower orifice to allow fluid communication between the first tank and the second tank and the third tank. ### Claim 4 (depends on 3) The valve assembly as set forth in claim 3 wherein said at least one upper orifice includes a pair of upper orifices disposed diametrically opposite of one another in fluid communication with the second tank; and said at least one lower orifice includes a pair of lower orifices disposed diametrically opposite of one another axially space from and orthogonal to said pair of upper orifices and in fluid communication with the third tank. ### Claim 5 (depends on 4) The valve assembly as set forth in claim 4 wherein said at least one upper slot includes a pair of upper slots disposed diametrically opposite of one another for alignment with said pair of upper orifices in said second position and said fourth position; and said at least one lower slot includes a pair of lower slots disposed diametrically opposite of one another axially space from and orthogonal to said pair of upper slots for alignment with said lower orifices in said third position and said fourth position. ### Claim 6 (depends on 2) The valve assembly as set forth in claim 2 wherein said actuator includes a moving member disposed in said lower portion and coupled to said valve member for rotating said valve member along said body axis from said first position to said second position and said third position and said fourth position. ### Claim 7 (depends on 6) The valve assembly as set forth in claim 6 wherein said moving member is a motor. ### Claim 8 (depends on 6) The valve assembly as set forth in claim 6 further including a connector extending outwardly from said moving member through said divider and coupled to said valve member to allow said moving member to rotate said valve member from said first position to said second position and said third position and said fourth position. ### Claim 9 A valve assembly for an air spring comprising; a casing disposed on a body axis extending between a proximal end and a distal end defining a compartment extending therebetween; a cap disposed at said proximal end and defining a first tank disposed in fluid communication with said compartment; a partitioning member slidably disposed in said compartment separating said compartment into a second tank and a third tank with said second tank being between said proximal end and said partitioning member and said third tank being between said partitioning member and said distal end; a valve including a body disposed in said compartment and extending through said partitioning member along said body axis between an opened end attached to said cap in fluid communication with said first tank and a closed end attached to said distal end and defining a cavity extending between said opened end and said closed end; a divider disposed in said cavity separating said cavity into an upper portion between said opened end and said divider and a lower portion between said closed end and said divider; said body defining at least two orifices including at least one upper orifice in fluid communication with said cavity and said second tank and at least one lower orifice axially spaced from said at least one upper orifice and in fluid communication with said cavity and said third tank; and an actuator disposed in said cavity of said body and rotatable along said body axis in fluid communication with said first tank and said second tank and said third tank and movable from a first position with said actuator being in fluid communication with said first tank alone to a second position allowing fluid communication between said first tank and said second tank and a third position allowing fluid communication between said first tank and said third tank and a fourth position allowing fluid communication between said first tank and said second tank and said third tank. ### Claim 10 (depends on 9) The valve assembly as set forth in claim 9 wherein said actuator includes a valve member disposed in said upper portion and defining a conduit disposed in fluid communication with said first tank to define said first position and being rotatable from said first position to said second position and said third position and said fourth position. ### Claim 11 (depends on 10) The valve assembly as set forth in claim 10 wherein said valve member defines at least two slots including at least one upper slot spaced from said opened end and in fluid communication with said conduit and at least one lower slot axially spaced from said at least one upper slot and in fluid communication with said conduit whereby said valve member is rotatable from said first position to said second position with said at least one upper slot being aligned with said at least one upper orifice to allow fluid communication between said first tank and said second tank, to said third position with said at least one lower slot being aligned with said at least one lower orifice to allow fluid communication between said first tank and said third tank, and to said fourth position with said at least one upper slot being aligned with said at least one upper orifice and said at least one lower slot being aligned with said at least one lower orifice to allow fluid communication between said first tank and said second tank and said third tank. ### Claim 12 (depends on 11) The valve assembly as set forth in claim 11 wherein said at least one upper orifice includes a pair of upper orifices disposed diametrically opposite of one another in fluid communication with said second tank; and said at least one lower orifice includes a pair of lower orifices disposed diametrically opposite of one another axially space from and orthogonal to said pair of upper orifices and in fluid communication with said third tank. ### Claim 13 (depends on 12) The valve assembly as set forth in claim 12 wherein said at least one upper slot includes a pair of upper slots disposed diametrically opposite of one another for alignment with said pair of upper orifices in said second position and said fourth position; and said at least one lower slot includes a pair of lower slots disposed diametrically opposite of one another and orthogonal to said pair of upper slots for alignment with said pair of lower orifices in said third position and said fourth position. ### Claim 14 (depends on 10) The valve assembly as set forth in claim 10 wherein said actuator includes a moving member disposed in said lower portion and coupled to said valve member for rotating said valve member along said body axis from said first position to said second position and said third position and said fourth position. ### Claim 15 (depends on 14) The valve assembly as set forth in claim 14 further including a connector extending outwardly from said moving member through said divider and coupled to said valve member to allow said moving member to rotate said valve member from said first position to said second position and said third position and said fourth position. ### Claim 16 An air spring assembly comprising: a housing defining a chamber disposed on a center axis; a piston disposed in said chamber; a bellows disposed in said chamber and extending between a primary end secured to said housing and a secondary end secured to said piston defining a pocket extending between said housing and said piston; a casing disposed on a body axis spaced from said center axis extending between a proximal end and a distal end defining a compartment extending therebetween; a cap disposed at said proximal end and defining a first tank disposed in fluid communication with said compartment; a partitioning member slidably disposed in said compartment separating said compartment into a second tank and a third tank with said second tank being between said proximal end and said partitioning member and said third tank being between said partitioning member and said distal end; a valve including a body disposed in said compartment and extending through said partitioning member along said body axis between an opened end attached to said cap in fluid communication with said first tank and a closed end attached to said distal end and defining a cavity extending between said opened end and said closed end; a divider disposed in said cavity separating said cavity into an upper portion between said opened end and said divider and a lower portion between said closed end and said divider; said body defining at least two orifices including at least one upper orifice in fluid communication with said cavity and said second tank and at least one lower orifice axially spaced from said at least one upper orifice and in fluid communication with said cavity and said third tank; and an actuator disposed in said cavity of said body and rotatable along said body axis in fluid communication with said first tank and said second tank and said third tank and movable from a first position with said actuator being in fluid communication with said first tank alone to a second position allowing fluid communication between said first tank and said second tank and a third position allowing fluid communication between said first tank and said third tank and a fourth position allowing fluid communication between said first tank and said second tank and said third tank. ### Claim 17 (depends on 16) The air spring assembly as set forth in claim 16 wherein said actuator includes a valve member disposed in said upper portion and defining a conduit disposed in fluid communication with said first tank to define said first position and being rotatable from said first position to said second position and said third position and said fourth position. ### Claim 18 (depends on 17) The air spring assembly as set forth in claim 17 wherein said valve member defines at least two slots including at least one upper slot spaced from said opened end and in fluid communication with said conduit and at least one lower slot axially spaced from said at least one upper slot and in fluid communication with said conduit whereby said valve member is rotatable from said first position to said second position with said at least one upper slot being aligned with said at least one upper orifice to allow fluid communication between said first tank and said second tank, to said third position with said at least one lower slot being aligned with said at least one lower orifice to allow fluid communication between said first tank and said third tank, and to said fourth position with said at least one upper slot being aligned with said at least one upper orifice and said at least one lower slot being aligned with said at least one lower orifice to allow fluid communication between said first tank and said second tank and said third tank. ### Claim 19 (depends on 18) The air spring assembly as set forth in claim 18 wherein said actuator includes a moving member disposed in said lower portion and coupled to said valve member for rotating said valve member along said body axis from said first position to said second position and said third position and said fourth position. ### Claim 20 (depends on 19) The air spring assembly as set forth in claim 19 further including a connector extending outwardly from said moving member through said divider and coupled to said valve member to allow said moving member to rotate said valve member from said first position to said second position and said third position and said fourth position.