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Naveen Kumar Anbalagan. Sanjeev Sharma. Cao Lan. Cedric Silveo Jaranilla. Francisco Ferrer. Base Sistemas. Nissan Primastar X83 Service manual 2. It will be appreciated that while the direction of rotation 88 of the tire 12 is shown in FIGS.
The peristaltic pump is accordingly bi-directional and equally functional with the tire assembly moving in a forward or a reverse direction of rotation. The location of the peristaltic pump assembly will be understood from FIGS.
In one embodiment, the peristaltic pump assembly 14 is positioned between the rim flange surface 26 and a lower bead region 34 of the tire So positioned, the air tube 42 is radially inward from the tire footprint and is thus positioned to be flattened by forces directed from the tire footprint as described above.
The segment that is opposite the footprint will flatten from the compressive force from the footprint pressing the tube segment against the rim flange surface The positioning of the tube 42 is specifically shown as between a chafer of the tire at the bead region 34 and the rim surface The diametric sizing of the peristaltic pump air tube 42 is selected to span the circumference of the rim flange surface From the forgoing, it will be appreciated that the subject invention provides a bi-directionally peristaltic pump for a self-inflating tire in which a circular air tube 42 flattens segment by segment and closes in the tire footprint The air inlet T-device 44 may include a filter 80 and be self-cleaning.
The outlet T-device 46 employs a valve unit that may be configured as two one-way valves such as, but not limited to, the ball valves 60 , The peristaltic pump assembly 14 pumps air under rotation of the tire in either direction, one half of a revolution pumping air to the tire cavity 40 and the other half of a revolution pumping air back out of the inlet device 44 filter The peristaltic pump assembly 14 may be used with a secondary tire pressure monitoring system TPMS not shown of conventional configuration that serves as a system fault detector.
The TPMS may be used to detect any fault in the self-inflation system of the tire assembly and alert the user of such a condition. Variations in the present invention are possible in light of the description of it provided herein. While certain representative embodiments and details have been shown for the purpose of illustrating the subject invention, it will be apparent to those skilled in this art that various changes and modifications can be made therein without departing from the scope of the subject invention.
It is, therefore, to be understood that changes can be made in the particular embodiments described which will be within the full intended scope of the invention as defined by the following appended claims. What is claimed is: 1. A self-inflating tire assembly comprising: a rim having a tire mounting surface extending between first and second rim flanges;. The tire assembly of claim 1 , wherein the air tube is sequentially flattened by the tire footprint to pump air along the air passageway in either a forward tire direction of rotation or a reverse tire direction of rotation.
The tire assembly of claim 2 , wherein the air tube sequentially flattens to pump air along the air passageway to the inlet and outlet devices in either the forward or reverse tire directions of rotation.
The tire assembly of claim 3 , wherein a flattened tube segment resiliently returns to an un-flat condition when repositioned by tire rotation outside the tire tread footprint. The tire assembly of claim 4 , wherein the outlet device and the inlet device are mounted to the annular air tube substantially degrees apart. The tire assembly of claim 1 , wherein the annular air tube is substantially of circular configuration.
The tire assembly of claim 1 , wherein the annular air tube is positioned between a tire bead region and a rim flange radially inward of the tire tread region. The tire assembly of claim 1 , wherein the annular air tube is positioned between a tire bead region and the rim tire mounting surface radially inward of the tire tread region.
The tire assembly of claim 1 , wherein the outlet device comprises an outlet portal tube extending from the outlet device to the tire cavity. The tire assembly of claim 1 , wherein the air tube comprises a substantially circular array of air tube segments that sequentially flatten segment by segment radially opposite a tire footprint as the tire assembly rotates against a ground surface. The tire assembly of claim 10 , wherein the array of air tube segments flatten segment by segment and pump displaced air from the flattened tube segments to the outlet device and the inlet device.
The tire assembly of claim 1 , wherein further comprising a porous filter member positioned within an air portal of the inlet device. The tire assembly of claim 13 , wherein the air tube sequentially flattens in a direction counter to a tire direction of rotation to operatively pump air along the air passageway to the inlet device and the outlet device in either a forward tire direction of rotation or a reverse tire direction of rotation.
The tire assembly of claim 14 , wherein pumped air from the sequentially flattened air tube is alternately directed to the inlet device and exhausted from the air passageway or directed to the outlet device and channeled into the tire cavity.
The tire assembly of claim 16 , wherein air is pumped from the sequentially flattened air tube along the annular air passageway in either a forward tire direction rotation or a reverse tire direction of rotation. USB2 en. EPB1 en. JPB2 en. KRB1 en. BRPIB1 en. EPA1 en. EPA2 en.
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