US3593269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle tire pressure monitoring system
Assignee: Individual
•
Filing: 1969-07-31
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Granted: 1971-07-13
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Expires: 1989-07-31
Abstract
Abstract A system for detecting and warning of low air pressure in a vehicle tire which comprises an electrically responsive signaling device actuated by the closure of a pair of electrically conducting contact points secured to an inside surface of the sidewall portion of the tire. The contact points are vertically spaced from one another in a region of the tire wall which flexes in response to loss of air pressure within the tire. Electrical energy is supplied by the vehicle ignition system.
Inventors
- 👤 Olin N Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:57
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/06; B60C23/064
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A system for detecting and warning of low air pressure in a vehicle tire which comprises an electrical circuit having: (a) a pair of metallic contact points spaced in vertical relationship, and secured to an inside surface of the sidewall portion of a vehicle tire such that when the tire wall is compressed from lack of sufficient air pressure within the tire, the metallic points will be brought into contact with one another, one of said points being grounded to the vehicle tire rim, (b) an electric signaling device, and (c) means for establishing electrical contact between the ungrounded contact point and the said signaling device, said electrical circuit being designed to emit a signal from said signaling device upon closing of said metallic contact points.
Claim 2
Independent Claim
126 words
A system for detecting and warning of low air pressure in a vehicle tire which comprises an electrical circuit having: (a) a pair of metallic contact points spaced in vertical relationship, and secured to an inside surface of the sidewall portion of a vehicle tire such that when the tire wall is compressed from lack of sufficient air pressure within the tire, the metallic points will be brought into contact with one another, one of said points being grounded to the vehicle tire rim, (b) an electric signaling device, and (c) means for establishing electrical contact between the ungrounded contact point and the said signaling device, said electrical circuit being designed to emit a signal from said signaling device upon closing of said metallic contact points.
Claim 3
Dependent Claim
35 words
A detection and warning system according to claim 1, wherein the pair of metallic contact points is embodied in a plastic member secured to an inside surface of the sidewall portion of a vehicle tire.
Claim 4
Dependent Claim
14 words
A detection and warning system according to claim 2, wherein said plastic is rubber.
Claim 5
Dependent Claim
21 words
A detection and warning system according to claim 1, wherein said electric signaling device comprises an alarm which emits audible signals.
Claim 6
Dependent Claim
21 words
A detection and warning system according to claim 1, wherein said electric signaling device comprises a light which emits visible signals.
Claim 7
Dependent Claim
22 words
A detection and warning system according to claim 1, wherein said electric signaling device comprises in combination an alarm and a light.
Claim 8
Dependent Claim
83 words
A detection and warning system according to claim 1, wherein said means for establishing electrical contact between the ungrounded contact point and the signaling device comprises: (a) a continuous metallic ring mounted on the vehicle tire rim and insulated therefrom, and an insulated wire connecting the continuous metallic ring to the ungrounded metallic contact point, and (b) an electrical pickup brush member adjustably mounted on a nonrotating portion of the vehicle brake assembly and adapted to establish contact with the continuous metallic ring.
Claim 9
Dependent Claim
29 words
A detection and warning system according to claim 7, wherein the electrical pickup brush member comprises a replaceable carbon rod spring biased into contact with said continuous metallic ring.
Claim 10
Dependent Claim
23 words
A detection and warning system according to claim 1, wherein said electrical circuit is supplied with electrical energy from the vehicle ignition system.
References Cited (Backward Citations)
US2096540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |