US3729992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire-testing device
Assignee: STANFORD TECHNO CORP
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Filing: 1971-06-16
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Granted: 1973-05-01
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Expires: 1991-06-16
Abstract
Abstract A tire-testing device in which a test tire is powered in rotation by a road wheel while the tire is held by an appropriately directed force against the road wheel. The holding force is also used advantageously to confine the opposite ends of a strain gauge against movement while permitting the medial portion thereof to deflect in response to operating characteristic movements caused during the testing rotation of the tire.
Inventors
- 👤 J Lichtman
- 👤 J Salvi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:02
CPC Classifications
G; G01; G01M; G01M17/00; G01M17/007; G01M17/02; G01M17/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
183 words
A tire-testing device including a driving road wheel operatively arranged for tire-testing service, and a tire-holding means for mounting a tire to be tested in freewheeling relation and movable with said tire through a movement sequence preparatory to tire-testing service from a clearance position into an operative test position in which said tire is held against said road wheel and driven in rotation by said road wheel, said tire-holding means comprising an axle having said tire mounted for rotation thereon, an actuating member having forward portions thereon in pushing contact adjacent opposite ends of said axle, pressure-applying means operatively arranged to transmit a select tire-holding pressure through said actuating member against the axle of said tire, and a strain gauge fabricated of a comparatively rigid material, said strain gauge having an operative position oriented subsequently parallel to said axle of said tire and arranged so that said tire-holding pressure is transmitted through opposite ends thereof and said reverse direction forces are applied against said medial portion thereof, whereby said last named forces effectively indicate operating characteristics of said tire during testing rotation thereof.
Claim 2
Dependent Claim
183 words
A tire-testing device including a driving road wheel operatively arranged for tire-testing service, and a tire-holding means for mounting a tire to be tested in freewheeling relation and movable with said tire through a movement sequence preparatory to tire-testing service from a clearance position into an operative test position in which said tire is held against said road wheel and driven in rotation by said road wheel, said tire-holding means comprising an axle having said tire mounted for rotation thereon, an actuating member having forward portions thereon in pushing contact adjacent opposite ends of said axle, pressure-applying means operatively arranged to transmit a select tire-holding pressure through said actuating member against the axle of said tire, and a strain gauge fabricated of a comparatively rigid material, said strain gauge having an operative position oriented subsequently parallel to said axle of said tire and arranged so that said tire-holding pressure is transmitted through opposite ends thereof and said reverse direction forces are applied against said medial portion thereof, whereby said last named forces effectively indicate operating characteristics of said tire during testing rotation thereof.
Claim 3
Dependent Claim
183 words
In a tire-testing device in the operation of which a tire is powered in rotation about a rotation axis, an improved means for detecting movements in said rotation axis during said testing rotation of said tire including an axle mounting said tire in freewheeling rotation defining said rotation axis, and movement-detecting means adjacent an end of said axle comprising a slidably disposed member oriented perpendicularly of and in contact at one end with said axle so as to partake of sliding movement corresponding to axle movements transverse of said rotation axis, a strain gauge having a medial portion only projected through an opening in said slidably disposed member adjacent the end thereof remote from said axle and its opposite ends extending from opposite sides of said slidably disposed member, and holding means in engagement with said extending ends of said strain gauge so as to confine said ends against transverse movement during testing rotation of said tire, whereby only movements as are transmitted via said slidably disposed member to the medial portion of said strain gauge effect the operation of said strain gauge.
Claim 4
Dependent Claim
183 words
In a tire-testing device in the operation of which a tire is powered in rotation about a rotation axis, an improved means for detecting movements in said rotation axis during said testing rotation of said tire including an axle mounting said tire in freewheeling rotation defining said rotation axis, and movement-detecting means adjacent an end of said axle comprising a slidably disposed member oriented perpendicularly of and in contact at one end with said axle so as to partake of sliding movement corresponding to axle movements transverse of said rotation axis, a strain gauge having a medial portion only projected through an opening in said slidably disposed member adjacent the end thereof remote from said axle and its opposite ends extending from opposite sides of said slidably disposed member, and holding means in engagement with said extending ends of said strain gauge so as to confine said ends against transverse movement during testing rotation of said tire, whereby only movements as are transmitted via said slidably disposed member to the medial portion of said strain gauge effect the operation of said strain gauge.
Claim 5
Dependent Claim
61 words
An improved tire-testing device as claimed in claim 2 including a driving road wheel operatively arranged to power said tire in rotation, and wherein a directional force is exerted on said holding means so as to cause said confinement against movement of the ends of said strain gauge and also to hold said tire driving contact against said driving road wheel.
Claim 6
Dependent Claim
34 words
An improved tire-testing device as claimed in claim 3 wherein said holding means includes a U-shaped actuating member having bifurcated arms, each said arm being in pushing contact adjacent one end of said axle.
Claim 7
Dependent Claim
35 words
A tire-testing device as claimed in claim 4 wherein each opposite end of said axle is accommodated in a bearing which is contacted by a cooperating forward portion of each arm of said actuating member.
References Cited (Backward Citations)
US3060734A
Cited
US3206973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |