Patent US4450728A successfully refreshed from Google Patents.
US4450728A
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US
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Vehicle force measurement system
Assignee: Horiba Instruments Inc
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Filing: 1981-10-06
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Granted: 1984-05-29
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Expires: 2001-10-06
Abstract
Abstract A vehicle force measurement system for determining the force output of a vehicle independent of the radius dimensions of the driving wheels of the vehicle. A fifth wheel is utilized to provide an accurate vehicle speed reading. Torque and RPM sensors mounted to the driving wheels of the vehicle are used to determine the total power output of the vehicle and the total force output of the vehicle is determined by dividing the total power output by the speed signal from the fifth wheel.
Inventors
- 👤 Severino D'Angelo
- 👤 Max J. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:41
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/13; G01L3/00; G01L3/24; G01L3/242
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
A vehicle force measurement system for measuring the force output of a vehicle while the vehicle is operating on a roadway, including: torque sensor means connected to each of the driving wheels of the vehicle for producing a torque signal related to the rotational torque applied to the wheels; speed sensor means connected to each of the driving wheels of the vehicle for producing an angular velocity signal related to the rotational speed of the wheels; a fifth wheel connected to the vehicle so that said fifth wheel rotates at the speed of the vehicle; tachometer means associated with said fifth wheel for producing a speed signal related to the velocity of the vehicle; and circuit means for determining the force output of the vehicle by summing the products of said torque and angular velocity signals from each driving wheel and dividing the result by said speed signal.
Claim 2
Dependent Claim
148 words
A vehicle force measurement system for measuring the force output of a vehicle while the vehicle is operating on a roadway, including: torque sensor means connected to each of the driving wheels of the vehicle for producing a torque signal related to the rotational torque applied to the wheels; speed sensor means connected to each of the driving wheels of the vehicle for producing an angular velocity signal related to the rotational speed of the wheels; a fifth wheel connected to the vehicle so that said fifth wheel rotates at the speed of the vehicle; tachometer means associated with said fifth wheel for producing a speed signal related to the velocity of the vehicle; and circuit means for determining the force output of the vehicle by summing the products of said torque and angular velocity signals from each driving wheel and dividing the result by said speed signal.
Claim 3
Dependent Claim
28 words
The vehicle force measurement system of claim 1 wherein said circuit means includes means for sampling the values of said torque, angular velocity, and speed signals substantially simultaneously.
Claim 4
Dependent Claim
140 words
A vehicle force measurement system for measuring the force output of a vehicle while testing the vehicle in place with the driving wheels of the vehicle engaging a pair of rollers having a tachometer associated with the rollers for producing a speed signal related to the surface velocity of the rollers, including: torque sensor means connected to each of the driving wheels of the vehicle for producing a torque signal related to the rotational torque applied to the wheels; speed sensor means connected to each of the driving wheels of the vehicle for producing an angular velocity signal related to the rotational speed of the wheels; and circuit means for determining the force output of the vehicle by summing the products of said torque and angular velocity signals from each driving wheel and dividing the result by said speed signal.
Claim 5
Dependent Claim
140 words
A vehicle force measurement system for measuring the force output of a vehicle while testing the vehicle in place with the driving wheels of the vehicle engaging a pair of rollers having a tachometer associated with the rollers for producing a speed signal related to the surface velocity of the rollers, including: torque sensor means connected to each of the driving wheels of the vehicle for producing a torque signal related to the rotational torque applied to the wheels; speed sensor means connected to each of the driving wheels of the vehicle for producing an angular velocity signal related to the rotational speed of the wheels; and circuit means for determining the force output of the vehicle by summing the products of said torque and angular velocity signals from each driving wheel and dividing the result by said speed signal.
Claim 6
Dependent Claim
28 words
The vehicle force measurement system of claim 3 wherein said circuit means includes means for sampling the values of said torque, angular velocity, and speed signals substantially simultaneously.
References Cited (Backward Citations)
FR751913A
Cited
US3197986A
Cited
US3609313A
Cited
US3651690A
Cited
US3718036A
Cited
US3762775A
Cited
US3921446A
Cited
US4000928A
Cited
US3930409A
Cited
US3926043A
Cited
US4107776A
Cited
US4093939A
Cited
US4161116A
Cited
US4033183A
Cited
US4138723A
Cited
US4179740A
Cited
US4212063A
Cited
US4327578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |