Electronic monitoring device and patch assembly
A monitoring device and patch assembly includes a patch that removably and re-attachably holds the monitoring device. The patch is adapted to connect the monitoring device to a pneumatic tire when the monitoring device is held by the patch. The patch is configured to hold a monitoring device having a rounded outer surface. The patch holds the rounded monitoring device by having a resilient tube with an outlet having a diameter smaller than the diameter of the monitoring device. The monitoring device of the invention includes a feature that allows it to be removed from the patch.
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This application is a continuation application claiming priority from U.S. Pat. No. 7,009,506, which is a continuation-in-part application claiming priority from U.S. Pat. No. 6,860,303 issued Mar. 1, 2005, which is a divisional of U.S. Pat. No. 6,386,251 issued May 14, 2002, which is a continuation application claiming priority from U.S. Pat. No. 6,030,478 issued Feb. 29, 2000; the disclosures of each are incorporated herein by reference.
BACKGROUND OF THE INVENTION1. Technical Field
The invention generally relates to mounting arrangements for electronic monitoring devices and, more particularly, to an electronic monitoring device and patch assembly wherein the electronic monitoring device is removably attached to the patch so that the electronic monitoring device may be repeatedly removed from and reattached to the patch. Specifically, the present invention relates to a patch that removably and re-attachably holds an electronic monitoring device having a rounded body.
2. Background Information
Monitoring the engineering conditions of tires is becoming more and more desirable in the art. The monitored engineering conditions include internal pressure and internal temperature and other conditions that are useful for improving tire efficiency in the field. Monitoring tire conditions on large off-the-road equipment has become especially desirable given the costs of the tires.
Prior art methods of monitoring large truck tires have included passive integrated circuits embedded in the body of the tire, or self-powered circuits which are positioned external to the tire. The passive integrated circuits rely on inductive magnetic coupling or capacitative coupling to energize the circuit, thus providing power to the circuit from a source remote from the tire. Self-powered circuits positioned external to the tire are exposed to damage from the environment such as weather, road hazards and even vandalism.
Recent engineering advances have permitted the installation of monitoring devices having active integrated circuits within tires. One such device is described in U.S. Pat. No. 5,562,787 to Koch et al. entitled Method of Monitoring Conditions of Vehicle Tires, incorporated herein by reference, and assigned to the assignee of the present invention. These devices include an active circuit powered by a dedicated long life, miniature battery and at least one sensor for detecting, optionally storing and transmitting real time engineering conditions within the tire. Such devices are capable of being programmed to remain in an active, but dormant condition, but will switch automatically to an “awakened” condition in response to an external signal or a condition which exceeds preset limits.
These devices have been mounted to the tires in some prior art situations. Other systems have placed the monitoring device loosely inside the tire so that the monitoring device could roll freely within the tire while performing its monitoring functions. An example of this type of device is explained in U.S. Pat. No. 6,082,192. Although these “loose” devices have been accepted for use in some tires and in some situations, other tires and other situations are believed to perform better when the monitoring device is fixed to the tire. In these situations, a mount is desired that can be used to mount a “loose” monitoring device—such as the monitoring device having the rounded body of U.S. Pat. No. 6,082,192—into a tire.
BRIEF SUMMARY OF THE INVENTIONThe invention provides a monitoring device and patch assembly wherein the patch is configured to removably and re-attachably hold a monitoring device having a body that is outwardly curved. In one embodiment of the invention, the patch includes a tube that removably and re-attachably receives the monitoring device.
The invention also provides a monitoring device that has a feature that allows the monitoring device to be removed from the patch. In one embodiment, the feature is an opening in the body of the monitoring device that allows a hook to be connected to the body to extract the monitoring device from the patch.
The invention also provides a monitoring device and patch combination that positions the monitoring device in a predictable orientation with respect to the tire so that the antenna of the monitoring device may be tuned for the orientation. The invention provides embodiments wherein the antenna is encapsulated and freely extending.
The invention also provides an embodiment having a teardrop shaped monitoring device that is attached to a patch. The antenna of the monitoring device may extend into the tail portion of the teardrop. The teardrop shaped monitoring device may also be removably and re-attachably connected to the patch.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
Similar numbers refer to similar parts throughout the specification.
DETAILED DESCRIPTION OF THE INVENTIONEmbodiments of the present invention will be described below with reference to the drawings.
Affixed to the second side 18 of the vulcanized tire patch is a dual cure bonding layer 20, which has a first side (not shown) and a second side 22. This dual cure bonding layer may be assembled to the patch at any time following vulcanization of the patch and prior to assembly of the patch assembly to the tire innerliner. The dual cure bonding layer is permanently assembled to the patch to form patch assembly 60. A non-curing cement (not shown) is applied to side 18 of the patch in order to hold the dual cure bonding layer 20 onto the patch. Exemplary non-curing cement and an exemplary dual cure bonding layer are products of Patch Rubber Company. The important feature of the dual cure bonding layer is that it can be chemically activated and cured, without the need for heating to an elevated temperature. The process is diffusion controlled, however, and some minimal heating will speed the curing process. The dual cure bonding layer may be any material which can be activated and cured to the vulcanized rubber of the tire innerliner and the vulcanized patch. Preferably, however, the dual cure bonding rubber is natural rubber. The dual cure bonding rubber, after application of the activating cement, may cure at room temperature over a period of seventy-two (72) hours. However, if more rapid curing is desired, this may be accomplished by heating to 45.degree. C. for at least twenty-four hours.
Referring now to
The electronic monitoring device is a circuit board which includes sensors and may include an antenna. The electronic monitoring device may include a power source or battery, although the battery may be attached to the electronic monitoring device at a later time. In the preferred embodiment, the battery is not included as part of the electronic monitoring device. The electronic monitoring device 34 is encapsulated in a potting material 40 which solidifies into a rigid material as shown in
The tag assembly 70 may be of any configuration which allows it to fit within the contour of the cavity 16, both of which are cylindrical in the embodiment shown in
The positioning of the lock pin is not critical, so long as lock pin 78 positively secures tag assembly 70 into position within cavity 16 and prevents tag assembly 70 from moving. After insertion through the housing 14, the lock pin 76 is deformed so that it will not back out of the apertures. Tag assembly 70 may then be removed from the housing by simply drilling lock pin 76 out of aperture 78.
Many different methods of positively locking the tag assembly can be accomplished. By way of illustration of equivalent locking techniques, instead of a locking pin, a self-tapping screw may be inserted through aperture 78 and screwed into position within the potting.
In a second embodiment of the present invention, illustrated in
In a third embodiment of the present invention,
From the foregoing, other embodiments should be obvious. For example, a slot and spline arrangement not shown may be used to lock the tag assembly into the housing. Mating slots and splines are formed in the potting of the tag assembly and in the housing. After placing the tag assembly into the housing, an optional locking device as previously discussed may be used to prevent the tag assembly from backing out of the housing.
In yet another embodiment, depicted in
The fifth embodiment of the monitoring device (tag) and patch assembly of the invention is indicated generally by the numeral 200 in
The fifth embodiment of monitoring device 204 has an outer surface that is rounded or curved in a manner that allows the body to roll as described in U.S. Pat. No. 6,082,192. The exemplary embodiments of the invention depict monitoring devices that are free of flat surfaces. The exemplary embodiments in these drawings depict a sphere and an oblong sphere although other shapes are contemplated by the inventors. Other embodiments of monitoring device 204 may have outer surfaces that have substantially outer curved or rounded surfaces when the outer surfaces include a plurality of small flat surfaces that cooperate to define an, outer rounded surface. These types of monitoring devices are designed to be placed loosely within a tire such that they may roll around being bounded by only the tire and the rim. Monitoring device 204 may have the same structure as the monitoring device disclosed in U.S. Pat. No. 6,082,192; the disclosures of this patent are incorporated herein by reference. As such, monitoring device 204 and those having the same type of configuration (a rounded outer surface) do not have any features that may be used to secure them to a patch. Patch 202 of the present invention is designed to hold monitoring device 204 in a fixed position with respect to tire 71 without requiring any special modification to monitoring device 204 that would prevent monitoring device 204 from being used in a tire in a loose, free rolling configuration.
Patch 202 includes a base 206 and a tube section 208 that projects up from base 206. Patch 202 may include a bonding layer 20 as described above. Tube section 208 is annular and continuous and defines a cavity 210. Tube section 208 includes a continuous lip 211 that defines an opening 212 that provides access to cavity 210. Lip 211 and tube section 208 are free of interruptions, such as slits, that would allow lip 211 and tube section 208 to unintentionally open when used with the rounded monitoring devices of the invention. The continuity of lip 211 increases the retaining ability of patch 202 which is important when holding a spherical, oblong sphere, or teardrop shaped monitoring device. The continuity of lip 211 also reduces the risk that lip 211 will tear during extended use. Tube section 208 tapers closed toward lip 211.
The resting position of lip 211 and opening 212 is smaller than the maximum width of monitoring device 204 such that opening 212 must be stretched wider to allow monitoring device 204 to be inserted into and removed from cavity 210. Lip 211 thus has a closed resting position and an open stretched position. Cavity 210 has a depth that is greater than half of the height of monitoring device 204 such that tube section 208 will close around monitoring device 204 to hold it in place. The walls of tube section 208 have sufficient elasticity and extensibility such that opening 212 may be stretched open to accommodate monitoring device 204 to seat monitoring device 204 within patch 202 as depicted in
Opening 212 may be centered about the longitudinal axis of patch 202 such that opening 212 is directed toward the center of tire 71 when patch 202 is mounted to tire 71. Centrifugal forces will thus force monitoring device 204 against patch 202.
The inner surface 214 that defines cavity 210 may be curved to substantially match the outer curvature of monitoring device 204 as shown in
In the embodiment of the invention depicted in
A predictable proper alignment is important when monitoring device 204 has an antenna 218 that is tuned to function better when positioned in a specific direction. For example, antenna 218 may be aligned with the longest dimension of monitoring device 204 so that the user will known the orientation and can orient antenna 218 with respect to tire 71.
The proper alignment of monitoring device 204 is also important so that the breathing tube 219 for the pressure sensor remains positioned within opening 212.
The proper alignment is also important when monitoring device 204 has a retraction opening 220 that allows a tool or retraction device 222 to engage monitoring device 204 and pull it from patch 202 as shown in
Patch 202 has rounded and curved walls and surfaces that lack points where stresses are concentrated. The lack of stress concentration increases the durability of patch 202. Tube section 208 may also be configured to absorb vibrational forces. Assembly 200 also has the advantage that monitoring device 204 will not harm tire 71 if monitoring device 204 falls out of patch 202 because monitoring device is designed to be used loosely within tire 71 and includes no sharp edges that could damage tire 71.
The seventh embodiment of the monitoring device (tag) and patch assembly of the invention is indicated generally by the numeral 300 in
As described above, patch 202 is generally configured to hold monitoring device 304 in a manner that allows monitoring device 304 to be repeatedly removed from patch 202 and reattached to patch 202 so that monitoring device 202 may be selectively mounted to tire 71 by selectively mounting monitoring device 304 to patch 202. In the seventh embodiment of invention, monitoring device 304 is teardrop shaped with the rounded head 310 of the teardrop being held by patch 202 in the manner described above. The tapered tail portion 311 of monitoring device 304 extends out of patch 202 into the interior of tire 71.
Antenna 307 of the monitoring system may be positioned in tail portion 311 with components 308 being disposed in head 310. Antenna 307 is parallel to the longitudinal axis of patch 202. Antenna 307 is thus disposed substantially perpendicular to the surface of patch 202 that engages tire 71. This configuration allows antenna 307 to be disposed radially with respect to tire 71 when patch 202 is attached to the crown portion of tire 71 as depicted in
The ninth embodiment of the assembly is indicated generally by the numeral 350 in
The tenth embodiment of the assembly is indicated generally by the numeral 400 in
Housing 410 may be fabricated from the same material as protective body 406 or another material more rigid than the material of patch 402. In one embodiment of the invention, housing 410 is encapsulated around the upper portion of patch 402. In other embodiments, housing 410 may be adhesively connected or mechanically connected to patch 402.
Housing 410 defines a cavity 412 adapted to receive all of, or a portion of, monitoring device 404. Housing 410 and monitoring device 404 define cooperating threads 414 that allow monitoring device 404 to be selectively attached to and removed from housing 410. In addition to threads 414, any of the other attachment arrangements described above may be used without departing from the concepts of the invention.
While in accordance with the patent statutes, the best mode and preferred embodiment has been set forth above, the scope of the invention is not limited thereto, but rather by the scope of the attached claims.
Claims
1-23. (canceled)
24. A tire monitoring device configured to be mounted in a tire, the tire monitoring device comprising:
- a tag assembly including an electronic monitoring device and a rigid protective layer covering the electronic monitoring device; and
- a patch configured to be permanently mounted to an interior surface of the tire, the patch being formed at least in part by rounded walls, the tag assembly and the patch being selectively removably connected together by sliding either the tag assembly or patch relative to one another.
25. The tire monitoring device of claim 24, wherein the patch includes a tube section that surrounds the tag assembly when the patch and tag assembly are removably connected together.
26. The tire monitoring device of claim 24, wherein the tag assembly is not surrounded by the patch when the tag assembly is removably connected thereto, the tag assembly being configured to extend inward from the patch and the interior surface of the tire when mounted thereon.
27. The tire monitoring device of claim 24, wherein the patch is a rubber-based patch and the rigid protective layer is formed from at least one of epoxy and urethane.
28. The tire monitoring device of claim 27, wherein the rigid protective layer has a Young's Modulus of at least about 100,000 psi.
29. The tire monitoring device of claim 24, wherein the tag assembly includes an opening and the patch includes a projection configured to slidably engage the opening in the tag assembly such that the patch and tag assembly can be removably connected together by sliding either the tag assembly or patch relative to one another.
30. The tire monitoring device of claim 24, further comprising an antenna operably connected to the electronic monitoring device through the protective layer.
31. The tire monitoring device of claim 24, wherein the tag assembly includes two opposed, substantially linear sliding surfaces and the patch includes two opposed, substantially linear sliding surfaces that are configured to slidably engage the tag assembly sliding surfaces such that the tag assembly and patch can be selectively connected together by sliding either the tag assembly or patch relative to one another in a first direction and selectively disconnected by sliding either the tag assembly or patch relative to one another in a second opposite direction.
32. The tire monitoring device of claim 24, wherein the electronic monitoring device is configured to monitor both temperature and pressure inside the tire.
33. A tire monitoring device configured to be mounted in a tire, the tire monitoring device comprising:
- a tag assembly including an electronic monitoring device and a rigid protective layer covering the electronic monitoring device, the tag assembly including two opposed, substantially linear sliding surfaces;
- an antenna operably connected to the electronic monitoring device through the protective layer; and
- a patch configured to be permanently mounted to an interior surface of the tire, the patch including two opposed, substantially linear sliding surfaces that are configured to slidably engage the tag assembly sliding surfaces such that the tag assembly and patch can be removably connected and disconnected by sliding either the tag assembly or patch relative to one another in a substantially linear manner.
34. The tire monitoring device of claim 33, wherein the sliding engagement between the tag assembly and the patch act to secure the tag assembly and patch together as a combined assembly with no movement therebetween in a direction other than the sliding direction.
35. The tire monitoring device of claim 34, wherein the sliding engagement between the tag assembly and patch results in a portion of the patch fitting snugly between the two opposed sliding surfaces of the tag assembly, thereby preventing movement in a direction other than the sliding direction.
36. The tire monitoring device of claim 33, wherein the patch has a substantially planar surface configured to engage the inner surface of the tire, and the two opposing linear sliding surfaces form a portion of a member configured to extend inwardly from the substantially planar surface when the device is mounted in the tire.
37. A tire monitoring device configured to be mounted in a tire, the tire monitoring device comprising:
- a tag assembly including an electronic monitoring device and a rigid protective layer, the tag assembly including an opening; and
- a patch configured to be permanently mounted to an interior surface of the tire, the patch including a projection configured to selectively engage the opening in the tag assembly such that the patch and the tag assembly can be removably connected together by sliding either the tag assembly or patch relative to one another.
38. The tire monitoring device of claim 37, wherein the tag assembly is formed by using a mold having two halves, a liquefied material being provided in the mold surrounding the electronic monitoring device and allowed to subsequently solidify into the rigid protective layer.
39. The tire monitoring device of claim 37, wherein the sliding engagement between the tag assembly and the patch act to secure the tag assembly and patch together as a combined assembly with no movement therebetween in a direction other than the sliding direction.
40. The tire monitoring device of claim 37, wherein the tag assembly has a plurality of openings configured to selectively engage the projection from the patch.
41. A tire, comprising:
- a tread portion, a sidewall portion, and bead portion that together define an interior portion; and
- a tire monitoring device mounted within the interior portion of the tire, the tire monitoring device configured to monitor temperature and pressure within the interior portion of the tire, the tire monitoring device comprising:
- a tag assembly including an electronic monitoring device and a rigid protective coating covering the electronic monitoring device, the tag assembly including an opening; and
- a rubber-based patch including a projection configured to selectively slidably engage the opening in the tag assembly such that the patch and tag assembly can be removably connected to one another through a sliding motion, but are otherwise firmly fastened together as a combined assembly with no movement therebetween.
42. A tire, comprising:
- a tread portion, sidewall portion, and bead portion that together define an interior portion; and
- a tire monitoring device mounted within the interior portion of the tire, the tire monitoring device configured to monitor temperature and pressure within the interior portion of the tire, the tire monitoring device comprising:
- a tag assembly including an electronic monitoring device and a rigid protective layer, the tag assembly including two opposed, substantially linear sliding surfaces,
- an antenna operably connected to the electronic monitoring device through the protective layer;
- a rubber-based patch including two opposed, substantially linear sliding surfaces that are configured to selectively slidably engage the tag assembly sliding surfaces such that the patch and tag assembly are removably connected to one another through a sliding motion, but are otherwise firmly fastened together as a combined assembly with no movement therebetween.
43. The tire of claim 42, wherein the sliding engagement between the tag assembly and the patch results in a portion of the patch being captured within the tag assembly.
44. A tire for a vehicle, the tire comprising:
- a body;
- a patch attached to the body;
- an electronic monitoring device having at least one sensor for sensing a condition of the tire;
- at least one of the patch or electronic monitoring device having a slot; and
- a spline disposed in the slot to lock the electronic monitoring device to the patch.
45. The tire of claim 44, wherein the patch is formed from a vulcanized rubber.
46. The tire of claim 45, wherein the body includes an innerliner; the patch being connected to the innerliner.
47. The tire of claim 44, wherein the electronic monitoring device is encapsulated with an encapsulation material; the slot being at least partially defined by the encapsulation material.
48. The tire of claim 44, wherein the patch defines the spline.
49. The tire of claim 44, wherein the electronic monitoring device is encapsulated with an encapsulation material; the spline being defined by the encapsulation material.
50. The tire of claim 44, wherein the patch defines a cavity; the slot opening into the cavity of the patch.
51. The tire of claim 50, wherein a portion of the electronic monitoring device is disposed in the cavity defined by the patch; the spline being disposed between the portion of the electronic monitoring device disposed in the cavity and the patch.
52. A tire for a vehicle, the tire comprising:
- a body;
- a mount attached to the body; the mount defining a cavity;
- an electronic device having information related to the tire; at least a portion of the electronic monitoring device adapted to fit within the cavity of the mount;
- at least one of the mount or electronic monitoring device having a first slot; and
- a lock member disposed in the first slot to lock the electronic monitoring device within the mount.
53. The tire of claim 52, wherein the lock member projects from the other of the mount and electronic monitoring device.
54. The tire of claim 53, further comprising a ring-shaped slot disposed perpendicular to the first slot; the ring-shaped slot connected to the first slot.
55. The tire of claim 52, wherein the lock member comprises a spline.
56. The tire of claim 52, wherein the cavity is cylindrical; the portion of the monitoring device disposed in the cavity being cylindrical.
57. The tire of claim 52, wherein the lock member slides with respect to the slot.
58. The tire of claim 52, wherein the component that defines the first slot defines a plurality of first slots; a lock member being disposed in each of the first slots.
59. The tire of claim 58, wherein each of the lock members comprises a spline.
60. The tire of claim 58, wherein each of the first slots has a ring-shaped slot portion disposed perpendicular to the first slot.
61. The tire of claim 52, wherein the monitoring device is encapsulated with an encapsulation material.
Type: Application
Filed: Dec 14, 2005
Publication Date: Jul 20, 2006
Applicant:
Inventors: Paul Wilson (Tallmadge, OH), John Rensel (Tallmadge, OH), Russell Koch (Hartville, OH)
Application Number: 11/302,714
International Classification: B60C 23/00 (20060101);