WO2003089261A1 - Valve stem retention nut with a collar - Google Patents

Valve stem retention nut with a collar Download PDF

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Publication number
WO2003089261A1
WO2003089261A1 PCT/US2003/012050 US0312050W WO03089261A1 WO 2003089261 A1 WO2003089261 A1 WO 2003089261A1 US 0312050 W US0312050 W US 0312050W WO 03089261 A1 WO03089261 A1 WO 03089261A1
Authority
WO
WIPO (PCT)
Prior art keywords
collar
retention nut
nut
retention
tire
Prior art date
Application number
PCT/US2003/012050
Other languages
French (fr)
Inventor
Frank S. Banzhof
Original Assignee
Schrader-Bridgeport International
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schrader-Bridgeport International filed Critical Schrader-Bridgeport International
Priority to AU2003225060A priority Critical patent/AU2003225060A1/en
Publication of WO2003089261A1 publication Critical patent/WO2003089261A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0491—Constructional details of means for attaching the control device
    • B60C23/0494—Valve stem attachments positioned inside the tyre chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver

Abstract

A retention nut assembly is disclosed that includes a nut(21) having a first end. A collar (25) is coupled to the nut through an interlock and is formed to surround a perimeter and at least a portion of the first end of the retention nut.

Description

VALVE STEM RETENTION NUT WITH A COLLAR
BACKGROUND
This invention relates to remote tire pressure monitoring systems, and in particular to tire pressure monitoring systems that include retention nuts. The invention further relates to a method of installing such remote tire pressure monitoring systems.
A tire pressure monitoring system collects data related to tire pressure and tire conditions, typically via a pressure monitor and a tire valve that is attached to a tire rim. Clamp-in tire valves typically have been used on large motor vehicles and in high speed applications such as those associated with performance cars, and typically require a fastener such as a nut to keep the tire valve in place, i.e. fastened to a tire rim. Notwithstanding these exceptions, snap-in tire valves have become very popular in the motor vehicle industry due to their ease of installation since they do not require a fastener. However, more and more vehicles are utilizing remote tire pressure monitoring systems. In such a system, an electronic sensor is mounted on a tire valve. The sensor detects tire pressure and transmits radio energy encoding data related to the tire pressure. The electronics associated with remote tire pressure monitoring system typically are mounted in a housing. The weight of the housing and electronics dictates that clamp-in tire valves be used.
A retention nut in turn is used to hold the clamp-in tire valve in place. The retention nut is placed over a tire valve that has been inserted through an opening in a tire rim and is tightened against the rim, thus securing the tire valve. Often, the retention nut and the tire rim are made of dissimilar metals.
When the retention nut is tightened against the rim, a galvanic reaction may occur due to the dissimilar metals of the retention nut and the tire rim. Galvanic corrosion is a problem in areas where large amounts of salt and slag are used on roads to melt snow and create traction. As noted above, the number of vehicles utilizing remote tire pressure monitoring systems, and thus necessitating the use of a retention nut, is increasing. Accordingly, it would be desirable to have a retention nut that overcomes the disadvantages and limitations described above.
BRIEF SUMMARY
In order to address the need for an improved tire pressure monitoring system, a retention nut assembly is described below. According to one aspect of the invention, a nut is disclosed having a first. A collar is coupled to the nut through an interlock, and is formed to surround a perimeter and at least a portion of the first end of the retention nut.
According to another aspect of the invention, a wheel assembly is disclosed. The wheel assembly includes a tire valve having a base and exterior retention threads adjacent to the base, a tire pressure monitor that is attached to the base, and a retention nut having a first end and an opening having interior retention threads. The interior retention threads of the nut are coupled to the exterior retention threads of the tire valve so that the retention nut is adjacent the base. A collar is interlocked with the first end of the nut, and is formed to surround a perimeter and at least a portion of the first end of the retention nut. The tire valve is attached to a metal tire rim so that the first end of the retention nut is adjacent an outer side of the tire rim and the collar prevents contact between the retention nut and the outer side of the tire rim. According to another aspect of the wheel assembly, a bonding agent is used to attach the collar to the first end of the retention nut.
According to another aspect of the invention, a tire pressure monitor system is disclosed. The system includes a tire pressure monitor and a valve extending from the tire pressure monitor. The valve has a threaded portion for extension through an opening defined in a metallic wheel rim. A retention nut is also included and is formed of a dissimilar metal and sized to engage the threaded portion. Isolating means are disposed on the retention nut for isolating the retention nut and the metallic wheel rim when the tire pressure monitor is mounted on the metallic wheel rim. Another aspect of the invention includes a method of installing a tire pressure monitoring system having a collar, a retention nut, a tire valve, a pressure monitor, and a tire rim. The method includes attaching a collar to a first end of the retention nut. The pressure monitor is attached to a base of the tire valve. The tire valve is inserted through an opening in the tire rim so that the pressure monitor remains on the same side as an inner side of the tire rim. The retention nut is coupled to the tire valve so that the collar is adjacent to an outer side of the tire rim.
The foregoing and other features and advantages will become further apparent from the following detailed description of the presently preferred embodiments, read in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 is an embodiment of a tire pressure monitoring system attached with a tire rim, with a portion of a collar and a retention nut removed;
FIG. 2 is a side view of a tire valve associated with the tire pressure monitoring system of FIG. 1 having a pressure monitor attached to it; FIG. 3 is a side view of a retention nut and a collar associated with the tire pressure monitoring system of FIG. 1;
FIG. 4 is a rear view of the retention nut of FIG. 3;
FIG. 5 is a side view of the retention nut of FIG. 3 having a collar attached to it with a portion of the retention nut and collar removed; and FIG. 6 is an exploded view of the tire pressure monitoring system as attached to the tire rim;
FIG. 7 is a front view of the retention nut and collar;
FIG. 8 is a side, sectional view of a second embodiment of the retention nut and collar; FIG. 9 is a perspective view of the collar of FIG. 8;
FIG. 10 is a perspective view a third embodiment of the retention nut and collar;
FIG. 11 is a side, sectional view of a third embodiment of the retention nut and collar of FIG. 10; and FIG. 12 is a detailed view of the collar in FIG. 11. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Turning now to the drawings, FIG. 1 illustrates one embodiment of a tire pressure monitoring system 1. The tire pressure monitoring system 1 is attached to a tire rim 13, which in turn is attached to a tire on a vehicle (not shown). The tire pressure monitoring system 1 collects data related to tire pressure and tire conditions via a pressure monitor 3 and a tire valve assembly 5. The pressure monitor 3 may include electronic circuitry (not shown) that transmits the collected information to a remote receiver, which in turn conveys the information to the driver of the vehicle. Tire monitoring systems including such electronic circuitry are disclosed and described in U.S.
Patent Nos. 6,043,738, 6,005,480, and 5,963,128, the entire contents of which are hereby incorporated by reference.
The tire valve assembly 5 includes a clamp-in type tire valve 7, a retention nut 21 , and a collar 29. Preferably, the tire valve 7 has a standard design and is generally cylindrical in shape. Referring to FIG. 2, the tire valve
7 includes a base 9 that is adapted to receive the pressure monitor 3 and exterior retention threads 11 that are approximately adjacent to the base 9.
The tire valve 7 (along with the pressure monitor 3 coupled to it) is connected to a tire rim 13 by being inserted through an opening 15 in the tire rim 13. The tire rim preferably is a steel tire rim, although any suitable metal, for example, aluminum, may be used that possesses high-strength, corrosion- resistant properties. Examples include but are not limited to metals that are at least in part made up of steel. The tire rim 13 includes an inner side 17 and an outer side 19. When the tire valve 7 is inserted through the opening 15 in the tire rim 13, it is positioned so that the exterior retention threads 11 are on the same side as the outer side 19 of the tire rim 13 and so that the pressure monitor 3 remains on the same side as the inner side 17 of the tire rim 13.
Referring also to FIGs. 3-5, the retention nut 21 secures the tire valve 7 to the tire rim. The retention nut 21 preferably is made out of aluminum, but also may be made out of any suitable metal. Examples include but are not limited to metals or compounds that at least in part include aluminum, or any other metal that includes a benefit of being corrosion-resistant, high-strength, and resistant to being stripped or deformed.
The retention nut 21 includes a first end 23, a second end 25 opposite the first end 23, and a set of interior retention threads 27 within an opening 28 in the retention nut that are approximately adjacent the first end 23. The retention nut is removably coupled to the tire valve by a mating of the interior and exterior retention threads so that the first end of the retention nut is generally adjacent to the base of the tire valve.
The second end 25 of the retention nut 21 is shaped for engagement by a fastening tool. Preferably, the second end is hexagonally shaped for engagement by a standard wrench, although in additional embodiments the second end may be shaped to be compatible with other tools as well.
A collar 29 is attached to the first end 23 of the retention nut 21. The collar 29 is preferably made of a high-strength plastic, more preferably is made of nylon, and most preferably is made from 6/6 nylon, although in other embodiments any suitable non-conductive, high-strength material may be used. The collar 29 is preferably a snap-on collar, although in other embodiments the collar may be otherwise attached to the first end of the tire valve. For example, in other embodiments the coHar may be molded onto the first end of the retention nut.
Referring to FIGs. 5 and 6, the collar 29 is attached to the first end 23 via an interlock 31. The interlock 31 preferably includes at least two detents 33 formed on an inner diameter 30 of the collar 29, although in other embodiments a greater number of detents may be included, and most preferably four detents are included. The detents preferably are formed as part of the collar via a molding process, although in other embodiments other suitable fabrication techniques may be used. The detents 33 are radially spaced approximately 180 degrees apart, although again in other embodiments the spacing may be varied. By way of example, in embodiments having four detents, the detents may be radially spaced at 90 degrees apart, or may be radially spaced in groups of two at 180 degrees apart. Also in a preferred embodiment, an outer diameter 63 of the first end 23 of the retention nut 21 includes at least two apertures 35 (see also FIG. 3) that receive the detents 33 when the collar 29 is attached to the first end 23. As with the detents, the number of apertures may be varied to correspond to the number of detents in the collar. Thus when attached, the collar and first end are interlocked to reduce the likelihood that the collar will become separated from the retention nut due to conditions that may be experienced during shipping, installation or use.
In addition to an interlock, in an alternate embodiment, the collar may be attached to the first end of the retention nut via a bonding agent.
Preferably, the bonding agent is an epoxy, although any type of bonding agent may be used that is suitable for use with porous materials and in environments that may have higher levels of humidity. The use of a bonding agent allows for the elimination of the mechanical interlock. When the collar 29 is attached to the first end 23 of the retention nut
21 , it covers a perimeter 37 and at least a portion of the first end 23 (see FIG. 7) so that when the retention nut secures the tire valve to the tire rim, the first end does not contact the outer side of the tire rim. Thus, the collar 29 is positioned between the first end 23 and the outer side 19 of the tire rim 13, and forms an isolating means to prevent corrosion that can result from contact between the retention nut and tire rim. Because the retention nut is made of aluminum and the tire rim is made of steel, or any other suitable metals as noted above for both the tire rim and the retention nut, having the collar between the retention nut and the tire rim will help reduce the occurrence of galvanic reactions that may otherwise occur if the nut and rim come into contact with each other.
In addition to the preferred embodiments described above, additional embodiments and variations of the tire pressure monitoring system are also possible. For example, as shown in FIG. 1, a sealing member 41 such as a grommet may be included adjacent to the inner side 17 of the tire rim 13. The sealing member 41 has an opening (not shown) for the tire valve 7 to pass through before it is inserted through the opening 15 in the tire rim 13. When the retention nut 21 is tightened against the outer side 19 of the tire rim, a seal is formed due to the sealing member 41 being squeezed against the inner side 17 of the tire rim 13. In additional embodiment, by way of further example, instead of detents the collar may include at least two apertures. As with the embodiments described above for a collar having detents, a greater number of apertures may also be included. The apertures are radially spaced approximately 180 degrees apart, although in other embodiments the spacing may be varied. Corresponding to the apertures are detents located on the first end of the tire valve. As with the apertures, the number of detents may be varied to correspond to the number of apertures in the collar.
FIGs. 8-9 and 10-12 show two additional embodiments of the retention nut and collar whose characteristics are the same as the embodiments described above except as noted in the following descriptions. FIG. 8 shows a retention nut 221 having a recessed member 222 at a first end 223 of the retention nut 221 that extends around at least a portion of an inner diameter
251 of the retention nut 221. In a preferred embodiment, the recessed member is formed as a continuous ring about the inner diameter of the retention nut. As described further below, the recessed member 222 forms part of an interlock 231 that attaches a collar 229 and the retention nut 221. The recessed member 222 preferably is recessed approximately 0.010 inches, although other suitable amounts may also be used. Note that in additional embodiments, rather than using one continuous recessed member, several recessed members may be radially spaced about the inner diameter 251 of the retention nut 221. Referring to FIG. 9, the collar 229 is attached to the first end 223 of the retention nut 221 via the interlock 231. The collar includes prongs 253 extending downwardly from an inner diameter 230 of the collar 229. The prongs 253, along with the recessed member 222, form the interlock 231. In a preferred embodiment there are four prongs 253 associated with the collar 229 that are radially spaced at approximately 90 degrees apart. In additional embodiments, a lesser or greater number of prongs may be used. Alternatively, rather than prongs, a continuous engaging member may be used that extends downwardly from the inner diameter of the collar that is continuous with respect to the inner diameter and engages with a recessed member that is continuous about the inner diameter of the retention nut. Moreover, in embodiments that utilize prongs, the prongs may be radially spaced other than at 90 degrees.
The prongs 253 preferably are made of the same material as the collar 229 and are formed as a part of the collar via a molding process, although other suitable fabrication techniques may be used to attach the prongs 253 to the collar 229. Each prong 253 includes a protruding member 257 at a distal end 258 of the prong 253 that extends outwardly from an outer face 259 of the prong 253. The protruding member 257 preferably extends outwardly at approximately 90 degrees relative to the outer face 259, although the protruding member may also extend outwardly at a different angle in other embodiments. Moreover, in embodiments that use a continuous engaging member, the protruding member may be continuous about the engaging member, with the positioning and angle of protrusion being similar as that for protruding members associated with the prongs.
When the collar 229 is attached to the retention nut 221, it is placed upon the first end 223 of the retention nut 221 so that the prongs 253 are inserted into an opening 228 at the first end 223 of the retention nut 221 and contact the inner diameter 251. The prongs 253 continue in a downwardly direction along the inner diameter 251 until the protruding members 257 engage the recessed member 222. The interlock 231 thus is formed upon engagement of the recessed member 222 and the prongs 253. The positioning of the collar with respect to the retention nut and tire rim is the same as that described above.
FIGS. 10-12 show an additional embodiment of the retention nut 321 and collar 329. The retention nut 321 includes a recessed member 361 at a first end 323 of the retention nut 321 that extends around at least a portion of an outer diameter 363 of the retention nut 321. In a preferred embodiment, and as shown in FIGs. 10 and 11, the recessed member 361 is formed as a continuous ring about the outer diameter 363 of the retention nut 321. As described further below, the recessed member 361 forms part of an interlock 331 that attaches the collar 329 and the retention nut 321. The recessed member 361 preferably is recessed approximately 0.005 inches, although other suitable amounts also may be used. Note that in additional embodiments, rather than using one continuous recessed member, several recessed members may be radially spaced about the outer diameter 363 of the retention nut 321.
The collar 329 is attached to the first end 323 of the retention nut 321 via the interlock 331. As shown in FIG. 12, the collar includes an annular member 365 that protrudes outwardly from an inner diameter 330 of the collar 329. The annular member 365 preferably protrudes outwardly at approximately 0.005 inches relative to the inner diameter 330. In addition, as with the recessed member 361 described above, other suitable amounts may be used.
The annular member 365 preferably is continuous about the inner diameter 330, although, as with the recessed member, several annular members may be radially spaced about the inner diameter 330 of the collar 329. The annular member 365 preferably is made of the same material as the collar 329 and is formed as a part of the collar via a molding process, although other suitable fabrication techniques may be used.
When the collar 329 is attached to the retention nut 321, it is placed over the first end 323 of the retention nut 321 so that the annular member 365 contacts the outer diameter 363 of the retention nut 321. The annular member 365 continues in a downwardly direction along the outer diameter
363 until it engages the recessed member 361. The interlock 331 thus is formed upon engagement of the recessed member 361 and the annular member 365. The positioning of the collar with respect to the retention nut and tire rim is the same as that described above. In order to install the tire pressure monitoring system 1 of the present invention, the tire rim 13, the pressure monitor 3, the tire valve 7, the retention nut 21 , and the collar 29 are provided. The collar 29 is attached to the first end 23 of the retention nut 21 via the interlock 31. The pressure monitor 3 is coupled to the base 9 of the tire valve 7. The tire valve is inserted through the opening 15 in the tire rim until the tire pressure monitor contacts the inner side 17 of the tire rim. The retention nut is passed over the tire valve so that the exterior retention threads 11 of the tire valve are mated with the interior retention threads 27 of the retention nut. When the retention nut is tightened, the collar comes into contact with the outer side 19 of the tire rim. Moreover, if a sealing member 41 has been placed adjacent the inner side 17 of the tire rim, a seal is formed between the sealing member and tire rim as the retention nut is tightened.
The use of the retention nut provides several advantages. The electronics associated with remote tire pressure monitoring systems of the present embodiments generally are mounted in a housing whose weight dictates that clamp-in tire valves be used. A clamp-in tire valve in turn is held in place with a retention nut. The use of dissimilar metals for the retention nut and the tire rim may cause galvanic corrosion if these two parts come into contact with each other. Galvanic corrosion is a problem in areas where large amounts of salt and slag are used on roads to melt snow and create traction. Thus, the use of the collar provides an insulating barrier between the retention nut and the tire rim. In addition, the interlocking configuration of the retention nut and collar helps assure that the collar will remain in place, and allows a damaged or worn collar to be easily removed and replaced.
While the above description constitutes the preferred embodiments of the present invention, it will be appreciated that the invention is susceptible of modification, variation, and change without departing from the proper scope and fair meaning of the accompanying claims.

Claims

1. A retention nut assembly comprising: a nut having a first end; a collar coupled to the first end of the nut through an interlock, the collar formed to surround a perimeter and at least a portion of the first end of the retention nut.
2. The retention nut assembly of claim 1 , wherein the interlock further comprises at least two detents on an inner diameter of the collar and at least two apertures on an outer diameter of the nut that correspond to and receive the at least two detents.
3. The retention nut assembly of claim 1, wherein the interlock further comprises at least two detents on an outer diameter of the nut and at least two apertures on an inner diameter of the collar that correspond to and receive the at least two detents.
4. The retention nut assembly of claim 2 or 3, wherein the at least two detents are radially spaced approximately 180 degrees relative to the perimeter.
5. The retention nut assembly of claim 1 , wherein the interlock further comprises at least one recessed member located about at least a portion of an inner diameter of the nut and at least two prongs that extend downwardly from an inner diameter of the collar that engage the at least one recessed member.
6. The retention nut assembly of claim 5, wherein the at least two prongs further comprises four prongs extending downwardly from the inner diameter of the collar and radially spaced approximately 90 degrees about the inner diameter of the collar.
7. The retention nut assembly of claim 5, wherein the at least two prongs each include a protruding member at a distal end of the prong that extends outwardly from an outer face of the prong, whereby the protruding member engages the at least one recessed member of the nut.
8. The retention nut assembly of claim 5, wherein the at least one recessed member further comprises one recessed member that is continuous about the inner diameter of the nut.
9. The retention nut assembly of claim 1 , wherein the interlock further comprises a continuous recessed member on an inner diameter of the nut and a continuous engaging member that extends downwardly from an inner diameter of the collar that engages the recessed member.
10. The retention nut assembly of claim 9, wherein the engaging member includes a protruding member at a distal end of the engaging member that extends outwardly from an outer face of the engaging member, whereby the protruding member engages the recessed member of the nut.
11. The retention nut assembly of claim 1 , wherein the interlock further comprises at least one recessed member located about at least a portion of an outer diameter of the nut and at least one annular member located about at least a portion of an inner diameter of the collar that engages the at least one recessed member.
12. The retention nut assembly of claim 11 , wherein the at least one recessed member further comprises one recessed member that is continuous about the outer diameter of the nut.
13. The retention nut assembly of claim 12, wherein the at least one annular member further comprises one annular member that is continuous about the inner diameter of the collar.
14. The retention nut assembly of claim 11 , wherein the at least one annular member protrudes outwardly from the inner diameter of the collar approximately 0.005 inches.
15. The retention nut assembly of claim 1 , wherein the collar is a snap-on collar.
16. The retention nut assembly of claim 1 , wherein the collar is molded onto the retention nut.
17. The retention nut assembly of claim 1 , wherein the nut is made at least in part of aluminum.
18. The retention nut assembly of claim 1 , wherein the collar is made of a nylon material.
19. The retention nut assembly of claim 18, wherein the collar is made of 6/6 nylon.
20. The retention nut assembly of claim 1, wherein the nut includes a second end shaped for engagement by a fastening tool.
21. The retention nut assembly of claim 20, wherein the second end of the nut is hexagonally shaped.
22. A wheel assembly comprising: a tire valve having a base and exterior retention threads adjacent to the base; a tire pressure monitor attached to the base of the tire valve; a retention nut having a first end and an opening having interior retention threads, the interior retention threads of the nut being coupled to the exterior retention threads of the tire valve such that the retention nut is adjacent the base; and a collar interlocked with the first end of the nut, the collar formed to surround a perimeter and at least a portion of the first end of the retention nut; whereby the tire valve is attached to a metal tire rim such that the first end of the retention nut is adjacent an outer side of the tire rim, and whereby the collar prevents contact between the retention nut and the outer side of the tire rim.
23. The wheel assembly of claim 22, wherein the collar includes at least two detents on an inner diameter of the collar and the retention nut includes at least two apertures on an outer diameter of the retention nut that correspond to and receive the at least two detents.
24. The wheel assembly of claim 23, wherein the at least two detents are radially spaced approximately 180 degrees apart about the inner diameter.
25. The wheel assembly of claim 22, wherein the collar is a snap-on collar.
26. The wheel assembly of claim 22, wherein the collar is molded onto the retention nut.
27. The wheel assembly of claim 22, wherein the retention nut includes at least two detents about an outer diameter of the retention nut and the plastic collar includes at least two apertures about the inner diameter of the collar that correspond to and receive the at least two detents.
28. The wheel assembly of claim 22, wherein the collar is made of a nylon material.
29. The wheel assembly of claim 28, wherein the collar is made of
6/6 nylon.
30. The wheel assembly of claim 22, wherein the nut is made at least in part of aluminum.
31. The wheel assembly of claim 30, wherein the tire rim is made at least in part of steel.
32. The wheel assembly of claim 22, wherein the retention nut includes a second end shaped for engagement by a fastening tool.
33. The wheel assembly of claim 22 further including a sealing member adjacent to an inner side of the tire wheel such that a seal is formed when the retention nut is tightened against the outer side of the tire rim.
34. The wheel assembly of claim 22, wherein the retention nut further comprises at least one recessed member located about at least a portion of an inner diameter of the retention nut and wherein the collar further comprises at least two prongs that extend downwardly from an inner diameter of the collar and engage the at least one recessed member.
35. The wheel assembly of claim 34, wherein the at least two prongs further comprises four prongs extending downwardly from the inner diameter of the collar and radially spaced approximately 90 degrees about the inner diameter of the collar.
36. The wheel assembly of claim 34, wherein the at least two prongs each include a protruding member at a distal end of the prong that extends outwardly from an outer face of the prong, whereby the protruding member engages the at least one recessed member of the retention nut.
37. The wheel assembly of claim 34, wherein the at least one recessed member further comprises one recessed member that is continuous about the inner diameter of the retention nut.
38. The wheel assembly of claim 22, wherein the retention nut further comprises a continuous recessed member on an inner diameter of the retention nut and wherein the collar further comprises a continuous engaging member that extends downwardly from an inner diameter of the collar that engages the recessed member.
39. The wheel assembly of claim 38, wherein the engaging member includes a protruding member at a distal end of the engaging member that extends outwardly from an outer face of the engaging member, whereby the protruding member engages the recessed member of the retention nut.
40. The wheel assembly of claim 22, wherein the retention nut further comprises at least one recessed member located about at least a portion of an outer diameter of the retention nut and wherein the collar further comprises at least one annular member located about at least a portion of an inner diameter of the collar and engages the at least one recessed member.
41. The wheel assembly of claim 40, wherein the at least one recessed member further comprises one recessed member that is continuous about the outer diameter of the retention nut.
42. The wheel assembly of claim 41 , wherein the at least one annular member further comprises one annular member that is continuous about the inner diameter of the collar.
43. The wheel assembly of claim 40, wherein the at least one annular member protrudes outwardly from the inner diameter of the collar approximately 0.005 inches.
44. A method of installing a tire pressure monitoring system that includes a collar, a retention nut, a tire valve, a pressure monitor, and a tire rim, the method comprising: attaching a collar to a first end of the retention nut; attaching the pressure monitor to a base of the tire valve; threading the tire valve through an opening in the tire rim such that the pressure monitor remains on the same side as an inner side of the tire rim; and coupling the retention nut to the tire valve such that the collar is adjacent to an outer side of the tire rim.
45. The method of claim 44 wherein the retention nut and the tire valve are coupled by a threaded connection.
46. The method of claim 44 wherein the collar is attached to the first end of the retention nut by being snapped onto the first end.
47. The method of claim 44 further comprising: providing a sealing member adjacent the inner side of the tire rim; and forming a seal by compressing the sealing member against the inner side of the tire rim by tightening the retention nut and collar against the outer side of the tire rim.
48. A tire pressure monitor system comprising: a tire pressure monitor; a valve extending from the tire pressure monitor and having a threaded portion for extension through an opening defined in a metallic wheel rim; a retention nut formed of a dissimilar metal and sized to engage the threaded portion; isolating means disposed on the retention nut for isolating the retention nut and the metallic wheel rim when the tire pressure monitor is mounted on the metallic wheel rim.
49. The tire pressure monitor system of claim 48, wherein the isolating means further comprises a collar coupled to a first end of the retention nut through an interlock, the collar formed to surround a perimeter and at least a portion of the first end of the retention nut.
50. The tire pressure monitor system of claim 49, wherein the collar includes at least two detents on an inner diameter of the collar and the retention nut includes at least two apertures on an outer diameter of the retention nut that correspond to and receive the at least two detents.
51. The tire pressure monitor system of claim 49, wherein the retention nut includes at least two detents on an outer diameter of the retention nut and the collar includes at least two apertures on an inner diameter of the collar that correspond to and receive the at least two detents.
52. The tire pressure monitor system of claim 50 or 51 , wherein the at least two detents are radially spaced approximately 180 degrees apart relative to the perimeter.
53. The tire pressure monitor system of claim 49 further comprising at least one recessed member about at least a portion of an inner diameter of the retention nut and at least two prongs that extend downwardly from an inner diameter of the collar that engage the at least one recessed member.
54. The tire pressure monitor system of claim 53, wherein the at least two prongs each include a protruding member at a distal end of the prong that extends outwardly from an outer face of the prong, whereby the protruding member engages the at least one recessed member of the retention nut.
55. The tire pressure monitor system of claim 49, further comprising a continuous recessed member on an inner diameter of the retention nut and a continuous engaging member that extends downwardly from an inner diameter of the collar that engages the recessed member.
56. The tire pressure monitor system of claim 55, wherein the engaging member includes a protruding member at a distal end of the engaging member that extends outwardly from an outer face of the engaging member, whereby the protruding member engages the recessed member of the retention nut.
57. The tire pressure monitor system of claim 49 further comprising at least one recessed member about at least a portion of an outer diameter of the retention nut and at least one annular member about at least a portion of an inner diameter of the collar that engages the at least one recessed member.
58. The tire pressure monitor system of claim 49, wherein the collar is made of a nylon material.
59. The tire pressure monitor system of claim 49, wherein the collar is attached to the first end of the retention nut by being snapped onto the first end.
60. A wheel assembly comprising: a tire valve having a base and exterior retention threads adjacent to the base; a tire pressure monitor attached to the base of the tire valve; a retention nut having a first end and an opening having interior retention threads, the interior retention threads of the nut being coupled to the exterior retention threads of the tire valve such that the retention nut is adjacent the base; and a collar attached via a bonding agent with the first end of the nut, the collar formed to surround a perimeter and at least a portion of the first end of the retention nut; whereby the tire valve is attached to a metal tire rim such that the first end of the retention nut is adjacent an outer side of the tire rim, and whereby the collar prevents contact between the retention nut and the outer side of the tire rim.
61. The wheel assembly of claim 60, wherein the bonding agent is an epoxy.
PCT/US2003/012050 2002-04-18 2003-04-18 Valve stem retention nut with a collar WO2003089261A1 (en)

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US12496902A 2002-04-18 2002-04-18
US10/124,969 2002-04-18

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP1681179A1 (en) 2005-01-13 2006-07-19 Meta System S.p.A. Apparatus for measuring the parameters of a tire, installable on the rim of a wheel
WO2009051810A1 (en) * 2007-10-19 2009-04-23 Schrader Bridgeport International, Inc. Tire sensor grommet tool and method

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US5844131A (en) * 1995-06-26 1998-12-01 Alligator Ventilfabrik Gmbh Tire pressure sensor apparatus for a pneumatic tire of a vehicle
US5963128A (en) 1994-11-22 1999-10-05 Schrader-Bridgeport International, Inc. Remote tire pressure monitoring system
US6005480A (en) 1998-05-20 1999-12-21 Schrader-Bridgeport International, Inc. Tire valve and associated tire pressure sending unit
US6043738A (en) 1998-06-26 2000-03-28 Schrader-Bridgeport International, Inc. Method and apparatus for identifying remote sending units in a vehicle
DE20119714U1 (en) * 2001-07-19 2002-02-28 Alligator Ventilfab Gmbh Device for measuring the tire pressure in a pneumatic tire of a vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2713302A1 (en) * 1976-03-25 1977-10-06 Toyota Motor Co Ltd Self setting tyre pressure monitor - has reference pressure in sub chamber reset when tyre inflated and displacing piston if pressure falls
US5963128A (en) 1994-11-22 1999-10-05 Schrader-Bridgeport International, Inc. Remote tire pressure monitoring system
US5844131A (en) * 1995-06-26 1998-12-01 Alligator Ventilfabrik Gmbh Tire pressure sensor apparatus for a pneumatic tire of a vehicle
US6005480A (en) 1998-05-20 1999-12-21 Schrader-Bridgeport International, Inc. Tire valve and associated tire pressure sending unit
US6043738A (en) 1998-06-26 2000-03-28 Schrader-Bridgeport International, Inc. Method and apparatus for identifying remote sending units in a vehicle
DE20119714U1 (en) * 2001-07-19 2002-02-28 Alligator Ventilfab Gmbh Device for measuring the tire pressure in a pneumatic tire of a vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1681179A1 (en) 2005-01-13 2006-07-19 Meta System S.p.A. Apparatus for measuring the parameters of a tire, installable on the rim of a wheel
WO2009051810A1 (en) * 2007-10-19 2009-04-23 Schrader Bridgeport International, Inc. Tire sensor grommet tool and method

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