# US 12,179,519 B2 · Axle assembly having a spindle plug and a sleeve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,179,519 B2 - Document ID: US12179519B2 - Status: Granted - Kind: B2 - Application number: 17/570,734 - Filed: 2022-01-07 - Published: 2023-07-13 - Granted: 2024-12-31 - Earliest claimed: 2022-01-07 - Assignees: ArvinMeritor Technology, LLC - Applicants: ArvinMeritor Technology, LLC - Inventors: Joshua Coombs; Brian Vinson; Gary Meyers - Web page: https://patentgrep.com/patent/US12179519B2 ## CPC - B60C 23/00336: {on the axles} - B60C 23/00345: {Details of the rotational joints} - B60B 27/0047: {characterised by functional integration of other elements} - B60B 27/0068: {the element being a sensor} - B60B 37/10: the wheels being individually rotatable around the axles - B60C 23/00318: {on the wheels or the hubs} - B60B 27/02: adapted to be rotatably arranged on axle - B60C 23/007: {having multiple wheels arranged side by side} - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION ## Abstract An axle assembly having a hose, a spindle plug, a sleeve, and a rotary union adapted to be fluidly connected to a tire. The spindle plug may be disposed in a spindle. The hose may be fluidly connected to the rotary union. The sleeve may encircle the hose and extend from the spindle plug to a stator of the rotary union. The sleeve cooperates with the spindle plug to limit rotation of the stator and the hose. ## Claims ### Claim 1 An axle assembly comprising: a spindle that defines a spindle hole that is disposed along an axis; a hub that is rotatable about the axis with respect to the spindle; a spindle plug that is disposed in the spindle hole and is fixedly positioned with respect to the spindle, the spindle plug defining an opening; a hose that extends through the opening; a rotary union comprising a stator and a rotatable fitting that is fluidly connected to the hose and rotatable about the axis with respect to the stator, wherein the rotatable fitting is adapted to be fluidly connected to a tire; and a sleeve that encircles the hose and that extends from the spindle plug to the stator, wherein the sleeve cooperates with the spindle plug to limit rotation of the stator and the hose about the axis, wherein the sleeve extends through the opening. ### Claim 2 (depends on 1) The axle assembly of claim 1 wherein at least a portion of the hose extends along the axis. ### Claim 3 (depends on 1) The axle assembly of claim 1 wherein the hub includes a hub cap that defines a hub cap cavity, and the spindle plug defines a vent opening that that allows air to pass between the spindle hole and the hub cap cavity. ### Claim 4 (depends on 3) The axle assembly of claim 3 wherein the vent opening receives a filter. ### Claim 5 (depends on 1) The axle assembly of claim 1 wherein the spindle plug defines a sensor opening that receives a sensor. ### Claim 6 An axle assembly comprising: a spindle that defines a spindle hole that is disposed along an axis; a hub that is rotatable about the axis with respect to the spindle; a spindle plug that is disposed in the spindle hole and is fixedly positioned with respect to the spindle, the spindle plug defining an opening; a hose that extends through the opening; a rotary union comprising a stator and a rotatable fitting that is fluidly connected to the hose and rotatable about the axis with respect to the stator, wherein the hose is received inside the stator and is coupled to the stator, and the rotatable fitting is adapted to be fluidly connected to a tire; and a sleeve that receives the hose and that extends from the spindle plug to the stator, wherein the spindle plug limits rotation of the sleeve, and the sleeve limits rotation of the stator and the hose about the axis, wherein the sleeve has a first end, a second end that is disposed opposite the first end, a sleeve hole that extends from the first end to the second end, and at least one anti-rotation feature that extends between the first end and the second end and that is disposed outside of the sleeve hole, wherein the anti-rotation feature engages the spindle plug to resist rotation of the sleeve about the axis. ### Claim 7 (depends on 6) The axle assembly of claim 6 wherein the sleeve has an enlarged portion that extends from the first end and an elongated portion that extends from the second end to the enlarged portion, wherein the enlarged portion extends further from the axis than the elongated portion and the anti-rotation feature is provided with the elongated portion. ### Claim 8 (depends on 7) The axle assembly of claim 7 wherein the anti-rotation feature extends from the enlarged portion toward the second end. ### Claim 9 (depends on 7) The axle assembly of claim 7 wherein the anti-rotation feature is configured as a rib that extends axially from the enlarged portion toward the second end. ### Claim 10 (depends on 7) The axle assembly of claim 7 wherein a gap is provided between the sleeve and the hose that permits the sleeve to disengage the stator when the enlarged portion is squeezed toward the axis. ### Claim 11 (depends on 7) The axle assembly of claim 7 wherein the sleeve includes a stop feature that extends away from the axis and that is disposed proximate the second end, wherein the stop feature is engageable with the spindle plug to inhibit the sleeve from being removed from the opening. ### Claim 12 (depends on 11) The axle assembly of claim 11 wherein the spindle plug is axially positioned between the enlarged portion and the stop feature. ### Claim 13 (depends on 11) The axle assembly of claim 11 wherein the enlarged portion extends further from the axis than the elongated portion and the stop feature encircles the elongated portion and is disposed at an end of the anti-rotation feature. ### Claim 14 (depends on 6) The axle assembly of claim 6 wherein the sleeve has an enlarged portion that extends from the first end and an elongated portion that extends from the second end to the enlarged portion, wherein a stator engaging anti-rotation feature is provided inside the enlarged portion that extends from the first end toward the elongated portion, and the stator engaging anti-rotation feature mates with the stator to limit rotation of the sleeve with respect to the stator. ### Claim 15 (depends on 14) The axle assembly of claim 14 wherein the enlarged portion has a retention feature that is spaced apart from the first end and that extends at least partially around the axis, wherein the retention feature mates with the stator to inhibit axial movement of the sleeve with respect to the stator. ### Claim 16 (depends on 15) The axle assembly of claim 15 wherein the retention feature encircles the axis and intersects the stator engaging anti-rotation feature. ### Claim 17 An axle assembly comprising: a spindle that defines a spindle hole that is disposed along an axis; a hub that is rotatable about the axis with respect to the spindle; a spindle plug that is disposed in the spindle hole and is fixedly positioned with respect to the spindle, the spindle plug defining an opening; a hose that extends through the opening; a rotary union comprising a stator, a rotatable fitting, and a torque tube, wherein the rotatable fitting is fluidly connected to the hose, is rotatable about the axis with respect to the stator, and is adapted to be fluidly connected to a tire, wherein the hose is received inside the stator and is coupled to the stator, wherein the torque tube is received inside the stator and the hose and fluidly connects the stator to the rotatable fitting, and wherein the rotatable fitting is rotatable about the axis with respect to the torque tube; and a sleeve that receives the hose and that extends from the spindle plug to the stator, wherein the spindle plug limits rotation of the sleeve, and the sleeve limits rotation of the stator and the hose about the axis. ### Claim 18 (depends on 17) The axle assembly of claim 17 wherein a hose retainer encircles the hose and secures the hose to the stator, wherein the hose retainer is at least partially received inside the stator, is received inside the sleeve, and is spaced apart from the sleeve. ### Claim 19 (depends on 17) The axle assembly of claim 17 wherein the sleeve has a first end, a second end that is disposed opposite the first end, a sleeve hole that extends from the first end to the second end, and at least one anti-rotation feature that extends between the first end and the second end and that is disposed outside of the sleeve hole, wherein the anti-rotation feature engages the spindle plug to resist rotation of the sleeve about the axis. ### Claim 20 (depends on 19) The axle assembly of claim 19 wherein the sleeve extends through the opening.