US4149140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for detecting change in tire pressure
Assignee: Individual
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Filing: 1977-05-23
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Granted: 1979-04-10
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Expires: 1997-05-23
Abstract
Abstract A novel method is disclosed for determining the change in tire pressure of a dual wheel tire by detecting a change in the axle housing moment arm supported by the wheel assembly. The preferred apparatus for carrying out the invention comprises one or more strain gauges affixed to the axle housing adjacent the tire assemblies and electronic means for measuring the strain occurring as a result of the underinflated tire.
Inventors
- 👤 Ronald H. Evans
- 👤 Jon M. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/06; B60G; B60G2401/00; B60G2401/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
Apparatus for detecting a change of pressure in one tire of a dual wheel assembly mounted to an axle housing by detecting a shift in the point of application of the resultant ground force transmitted by said dual wheel assembly to the axle housing, which comprises: at least two strain gauges affixed to the axle housing adjacent said dual wheel assembly, but placed at separate distances therefrom; means for detecting a change in resistance of each strain gauge; and means for comparing the change in resistance of each strain gauge in such a manner so as to determine a change in the point of application of the resultant ground force on the axle housing.
Claim 2
Dependent Claim
114 words
Apparatus for detecting a change of pressure in one tire of a dual wheel assembly mounted to an axle housing by detecting a shift in the point of application of the resultant ground force transmitted by said dual wheel assembly to the axle housing, which comprises: at least two strain gauges affixed to the axle housing adjacent said dual wheel assembly, but placed at separate distances therefrom; means for detecting a change in resistance of each strain gauge; and means for comparing the change in resistance of each strain gauge in such a manner so as to determine a change in the point of application of the resultant ground force on the axle housing.
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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |