Patent US3875558A successfully refreshed from Google Patents.
US3875558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a heat detecting tire, a heat detecting tire, and operative tire heat detecting system
Assignee: Individual
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Filing: 1974-05-31
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Granted: 1975-04-01
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Expires: 1994-05-31
Abstract
Abstract A method of making a heat detecting tire including applying or forming a coating of a heat sensitive electrically conductive plastic material adapted to melt or deform at about 250* F. to 300* F. over the entire inner surface of the tire and one bead area of the tire except for a narrow circumferentially extending band at a radially outer portion of the tire and providing electric circuit conductive means connecting to the wheel on which the tire is mounted and thus to said one bead area and also to an opposite annular band of the material in the tire for completion of a circuit through the tire when the tire is heated to excessive operating temperatures for sensing approaching blowout conditions and providing a warning thereof. Also, means are provided for detecting under inflation of a tire and warning the driver to prevent tire destruction from under inflation.
Inventors
- 👤 Charles R Samples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:11
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0491; B60C23/0493; B60C23/20; G; G01; G01K; G01K11/00; G01K11/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
116 words
A METHOD OF MAKING A HEAT DETECTING TIRE COMPRISING THE STEPS OF APPLYING A REMOVABLE BAND FORMING MEMBER TO A TIRE TO EXTEND AROUND THE TIRE PERIPHERY AT ABOUT THE CENTER OF THE INNER SURFACE THEREOF, APPLYING A LIQUID COATING OF A HEAT SENSITIVE ELECTRICALLY CONDUCTIVE PLASTIC MATERIAL ADAPTED TO MELT IN THE RANGE OF FROM ABOUT 250*F. TO ABOUT 300*F. OVER THE ENTIRE INNER SURFACE OF THE TIRE, AND THE MEMBER THEREON, THE COATING SETTING TO FORM A CONDUCTIVE FILM ON THE TIRE SURFACE, AND REMOVING THE BAND FORMING MEMBER TO LEAVE TWO SEPARATE LATERALLY SPACED ANNULAR BANDS OF THE PLASTIC MATERIAL ON THE TIRE FOR USE IN FORMING A CONDUCTIVE CIRCUIT IN THE TIRE
Claim 2
Independent Claim
116 words
A METHOD OF MAKING A HEAT DETECTING TIRE COMPRISING THE STEPS OF APPLYING A REMOVABLE BAND FORMING MEMBER TO A TIRE TO EXTEND AROUND THE TIRE PERIPHERY AT ABOUT THE CENTER OF THE INNER SURFACE THEREOF, APPLYING A LIQUID COATING OF A HEAT SENSITIVE ELECTRICALLY CONDUCTIVE PLASTIC MATERIAL ADAPTED TO MELT IN THE RANGE OF FROM ABOUT 250*F. TO ABOUT 300*F. OVER THE ENTIRE INNER SURFACE OF THE TIRE, AND THE MEMBER THEREON, THE COATING SETTING TO FORM A CONDUCTIVE FILM ON THE TIRE SURFACE, AND REMOVING THE BAND FORMING MEMBER TO LEAVE TWO SEPARATE LATERALLY SPACED ANNULAR BANDS OF THE PLASTIC MATERIAL ON THE TIRE FOR USE IN FORMING A CONDUCTIVE CIRCUIT IN THE TIRE
Claim 3
Dependent Claim
46 words
The method as in claim 1 and including placing a removable member over one bead area of the tire, coating both bead areas of the tire with the coating material, and removing such bead covering member to make such one bead area of the tire non-conductive.
Claim 4
Dependent Claim
137 words
In a vehicle, a pneumatic tire heat detecting system and/or low pressure warning system including a tire, a metal wheel positioning the tire, an axle means rotatably supporting the wheel thereon and including the improvement of said tire having a conductive layer on its inner surface and operatively connecting to said wheel at one bead area of said tire, said layer having a narrow annular interruption therein at one area of the tire, means grounding said wheel, conductive means connecting to said layer adjacent the other bead area of said tire and protruding from the wheel in insulated relation thereto, and warning circuit means including a rotary connection means connecting to said conductive means to provide a warning signal and indicate improper conditions in said tire when the spaced portions of said layer are brought into contact.
Claim 5
Dependent Claim
137 words
In a vehicle, a pneumatic tire heat detecting system and/or low pressure warning system including a tire, a metal wheel positioning the tire, an axle means rotatably supporting the wheel thereon and including the improvement of said tire having a conductive layer on its inner surface and operatively connecting to said wheel at one bead area of said tire, said layer having a narrow annular interruption therein at one area of the tire, means grounding said wheel, conductive means connecting to said layer adjacent the other bead area of said tire and protruding from the wheel in insulated relation thereto, and warning circuit means including a rotary connection means connecting to said conductive means to provide a warning signal and indicate improper conditions in said tire when the spaced portions of said layer are brought into contact.
Claim 6
Dependent Claim
43 words
In a system as in claim 3 where said layer is heat sensitive and excessive heat conditions in said tire are indicated when said layer melts or softens and flows over said interrupted portion of the tire surface to complete an electrical circuit.
Claim 7
Dependent Claim
27 words
In a system as in claim 4 where the material forming said layer will melt or soften at a temperature of from about 250*F. to about 300*F.
Claim 8
Dependent Claim
38 words
In a system as in claim 3 where said conductive means terminates in a spring device and said circuit means includes a fixed contact on the vehicle for engaging the spring device with each rotation of the wheel.
Claim 9
Dependent Claim
76 words
A heat detecting and/or low pressure warning tire comprising a pneumatic tire characterized by a coating or layer of an electrically conductive material being positioned on the inner surface of the tire except for at least one annular interruption of such layer to form two separate laterally spaced annular bands of the material on the tire for use in forming a conductive circuit in the tire when in operative condition and subjected to unusual operating conditions.
Claim 10
Dependent Claim
76 words
A heat detecting and/or low pressure warning tire comprising a pneumatic tire characterized by a coating or layer of an electrically conductive material being positioned on the inner surface of the tire except for at least one annular interruption of such layer to form two separate laterally spaced annular bands of the material on the tire for use in forming a conductive circuit in the tire when in operative condition and subjected to unusual operating conditions.
Claim 11
Dependent Claim
39 words
A pneumatic tire as in claim 7 where two of such bands are provided and each is heat sensitive and made from a material adapted to soften or melt at a temperature of from about 250*F. to about 300*F.
Claim 12
Dependent Claim
68 words
A pneumatic tire as in claim 8 where two of said bands are provided and one of said annular bands covers one bead of the tire and the other of said bands does not extend to the other tire bead and it has an electrical conductor secured thereto which protrudes from the tire, and said material forming said bands will soften and flow into contact at elevated temperatures.
Claim 13
Dependent Claim
40 words
A pneumatic tire as in claim 7 where said annular bands are made from a rubber material and the bands are spaced only a very short distance apart for contacting each other under abnormally high heat conditions in the tire.
Claim 14
Dependent Claim
44 words
A pneumatic tire as in claim 8 characterized by a plurality of pairs of separate laterally spaced concentric annular bands of the conductive material on the tire at different radial areas of the tire, and means electrically connecting corresponding bands of each pair together.
Claim 15
Dependent Claim
82 words
A pneumatic tire as in claim 7 where a gap exists between two adjacent bands in a sidewall area of the tire, and an individual conductive rubber strip is secured to each of said bands, each of said strips having an end portion protruding at an obtuse angle inwardly of the tire toward the other strip end portion to terminate immediately thereadjacent but spaced therefrom when the tire is properly inflated but which contact when the tire is under inflated under load.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |