US4050290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring friction between wheel and support
Assignee: Individual
•
Filing: 1975-11-26
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Granted: 1977-09-27
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Expires: 1995-11-26
Abstract
Abstract The present invention relates to a device for measuring friction between wheels and the wheel support. The device of the present invention is such that the friction, upon movement of the wheels, results in a measurable turning moment about a line, perpendicular to the direction of movement and substantially parallel or coinciding with a line through the centers of the wheels. The moment arises and is measured on suspension means of the wheels and/or a member interconnecting them.
Inventors
- 👤 Borje Arne Gunnar Lonnroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:17
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A device for measuring friction between wheel and support comprising: a. at least one wheel with a wheel suspension means permitting the wheel to rotate about a rotation axis line; b. means for moving the wheel suspension means with the wheel rolling on the support and somewhat inclined to the direction of movement; and c. measuring means for measuring the turning moment about a line being on the whole horizontal and substantially perpendicular to the direction of movement, which moment is produced on the wheel suspension means by the forces arising at the movement in the contact surface between the wheel and support.
Claim 2
Independent Claim
103 words
A device for measuring friction between wheel and support comprising: a. at least one wheel with a wheel suspension means permitting the wheel to rotate about a rotation axis line; b. means for moving the wheel suspension means with the wheel rolling on the support and somewhat inclined to the direction of movement; and c. measuring means for measuring the turning moment about a line being on the whole horizontal and substantially perpendicular to the direction of movement, which moment is produced on the wheel suspension means by the forces arising at the movement in the contact surface between the wheel and support.
Claim 3
Dependent Claim
29 words
A device according to claim 1, wherein the wheel suspension means is provided with a portion for measuring the turning moment, said portion being turnable about the measuring line.
Claim 4
Independent Claim
139 words
A device for measuring friction between wheel and support comprising: a. two wheels with a wheel suspension means permitting the wheels to rotate each about a rotation axis line, which lines form with the direction for a line through the centers of the wheels angles of substantially equal size; b. means for moving the wheel suspension means in a direction substantially perpendicular to the line through the centers of the wheels, the wheels rolling on the support and somewhat inclined to the direction of movement; and c. measuring means for measuring the turning moment about a measuring line coinciding or in parallel with said line through the centers of the wheels, which moment is produced on the suspension means of the wheels by the force arising at the movement in the contact surfaces between the wheels and the support.
Claim 5
Independent Claim
139 words
A device for measuring friction between wheel and support comprising: a. two wheels with a wheel suspension means permitting the wheels to rotate each about a rotation axis line, which lines form with the direction for a line through the centers of the wheels angles of substantially equal size; b. means for moving the wheel suspension means in a direction substantially perpendicular to the line through the centers of the wheels, the wheels rolling on the support and somewhat inclined to the direction of movement; and c. measuring means for measuring the turning moment about a measuring line coinciding or in parallel with said line through the centers of the wheels, which moment is produced on the suspension means of the wheels by the force arising at the movement in the contact surfaces between the wheels and the support.
Claim 6
Dependent Claim
27 words
A device according to claim 3, where the wheel suspension means has a portion turnable about the measuring line, on which portion the turning moment is measured.
Claim 7
Dependent Claim
53 words
A device according to claim 4, wherein the measuring line substantially intersects the rotation axis lines in the vicinity of the centers of the wheels, whereby normal forces from the support on the wheels counteracting the weight of the device together do not exert any turning moment of importance upon the measuring line.
Claim 8
Independent Claim
182 words
A device for measuring friction between wheel and support comprising: a. wheel suspension means comprising an axle with two inclined axle journals; b. a first wheel suspended on one of said axle journals to rotate about a first rotation axis line; c. a second wheel suspended on the other of said axle journals to rotate about a second rotation axis line, said first and second rotation axis lines lying substantially in the same plane and forming with the direction for a line through the centers of the wheels angles of substantially equal size; d. means for moving the wheel suspension means in a direction substantially perpendicular to said line through the centers of said wheels, the wheels rolling on the support and somewhat inclined to the direction of movement, whereby the forces arising at the movement in the contact surfaces between the wheels and support produces a turning moment on said axle about a measuring line in parallel with said line through the centers of said wheels; and e. measuring means for measuring said moment on said axle about said measuring line.
Claim 9
Independent Claim
182 words
A device for measuring friction between wheel and support comprising: a. wheel suspension means comprising an axle with two inclined axle journals; b. a first wheel suspended on one of said axle journals to rotate about a first rotation axis line; c. a second wheel suspended on the other of said axle journals to rotate about a second rotation axis line, said first and second rotation axis lines lying substantially in the same plane and forming with the direction for a line through the centers of the wheels angles of substantially equal size; d. means for moving the wheel suspension means in a direction substantially perpendicular to said line through the centers of said wheels, the wheels rolling on the support and somewhat inclined to the direction of movement, whereby the forces arising at the movement in the contact surfaces between the wheels and support produces a turning moment on said axle about a measuring line in parallel with said line through the centers of said wheels; and e. measuring means for measuring said moment on said axle about said measuring line.
Claim 10
Dependent Claim
21 words
A device according to claim 6, further including turning means for turning said axle and axle journals about said measuring line.
Claim 11
Dependent Claim
53 words
A device according to claim 7, wherein the measuring line substantially intersects the rotation axis lines in the vicinity of the centers of the wheels, whereby normal forces from the support on the wheels counteracting the weight of the device together do not exert any turning moment of importance upon the measuring line.
References Cited (Backward Citations)
FR789419A
Cited
US3538742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |