Patent US3707701A successfully refreshed from Google Patents.
US3707701A
Expired / Lapsed
US
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Device for measuring changes in radius of rubber tired vehicle wheels
Assignee: Individual
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Filing: 1971-02-18
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Granted: 1972-12-26
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Expires: 1991-02-18
Abstract
Abstract A system for detecting a change in the effective radii of rubber tired wheels mounted on vehicles with the vehicle in motion. The number of complete rotations made by a monitored wheel is detected and compared with a reference to determine the time interval defined as the time required for the monitored wheel to move from an in phase condition, out of phase, and back into phase again with respect to the reference. A wheel is in phase with its reference when both simultaneously produce a pulse signal. When this time period is less than a predetermined time interval, a warning signal is sent to the vehicle operator.
Inventors
- 👤 Wallace I Neu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:13
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/06; B60C23/061
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A system for monitoring the radius of rubber tired wheels mounted on a vehicle as the vehicle is moving comprises: a. means mounted on at least two monitored wheels for indicating when its corresponding wheel has completed a full rotation; and b. means generating an in-phase signal each time the indicating means on said at least two wheels are simultaneously activated, the time interval between in-phase signals being an indication of the effective radius of each wheel in relation to the other monitored wheels on the same vehicle.
Claim 2
Independent Claim
88 words
A system for monitoring the radius of rubber tired wheels mounted on a vehicle as the vehicle is moving comprises: a. means mounted on at least two monitored wheels for indicating when its corresponding wheel has completed a full rotation; and b. means generating an in-phase signal each time the indicating means on said at least two wheels are simultaneously activated, the time interval between in-phase signals being an indication of the effective radius of each wheel in relation to the other monitored wheels on the same vehicle.
Claim 3
Dependent Claim
31 words
The system of claim 1 further including means responsive to the in-phase signals for generating a warning signal when the time between successive in-phase signals is less than a predetermined time.
Claim 4
Dependent Claim
147 words
The system of claim 2 wherein said means responsive to said in-phase signals includes first relay means energized in response to each in-phase signal; second relay means energized in response to the energization of said first relay means, said second relay means including a delay means for causing said second relay means to remain in an energized state for a first time interval; third relay means energized in response to the energization of said second relay means, said third relay means including a delay means for causing said third relay means to remain energized for a second time interval; and means coupled to said third relay means for generating a warning signal in response to the generation of at least two successive in-phase signals within a time interval less than said predetermined time, said predetermined time corresponding to the sum of said first and second time intervals.
Claim 5
Dependent Claim
50 words
The system of claim 3 wherein said means for indicating includes a switch mounted on a stationary position adjacenT to each monitored wheel and an activation means mounted on a rotating portion of each monitored wheel for closing said switch at least once during each full revolution of the wheel.
Claim 6
Dependent Claim
19 words
The system of claim 4 wherein said switch is a reed switch and said activation means is a magnet.
Claim 7
Dependent Claim
120 words
As system for detecting a potentially dangerous condition of a rubber tired wheel mounted on a moving vehicle comprising: a. means mounted on said wheel producing signals in response to the rotation of the wheel; b. means generating reference signals; and c. means responsive to said reference signals and said signals in response to the wheel rotation for producing an in-phase signal upon the simultaneous occurrence of a reference signal and a signal in response to the wheel rotation and means responsive to said in-phase signals for generating a warning signal when the time interval between in-phase signals is less than a predetermined time, said warning signal indicating that the radius of said wheel has changed beyond a predetermined limit.
Claim 8
Dependent Claim
120 words
As system for detecting a potentially dangerous condition of a rubber tired wheel mounted on a moving vehicle comprising: a. means mounted on said wheel producing signals in response to the rotation of the wheel; b. means generating reference signals; and c. means responsive to said reference signals and said signals in response to the wheel rotation for producing an in-phase signal upon the simultaneous occurrence of a reference signal and a signal in response to the wheel rotation and means responsive to said in-phase signals for generating a warning signal when the time interval between in-phase signals is less than a predetermined time, said warning signal indicating that the radius of said wheel has changed beyond a predetermined limit.
Claim 9
Dependent Claim
15 words
The system of claim 6 wherein said means for generating reference signals comprises an oscillator.
Claim 10
Dependent Claim
39 words
The system of claim 6 wherein said means for generating a reference signal comprises another wheel mounted on said moving vehicle and means mounted on said another wheel for producing signals in response to the rotation of the wheel.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |