Patent US3848368A successfully refreshed from Google Patents.
US3848368A
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US
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Apparatus for pneumatic tire uniformity correction
Assignee: Individual
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Filing: 1972-07-05
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Granted: 1974-11-19
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Expires: 1992-07-05
Abstract
Abstract Apparatus and method for improving the radial force uniformity of a pneumatic tire rotated under a loaded condition. The rotating loaded tire is sensed with load cells that develop signals corresponding to radial force variations and developed in correspondence with the areas of the periphery of the tire treads that develop the signals. A reference signal level is established and all radial force variation signals over this level are applied through logic circuitry to memory devices, in the form of flip-flops. Grinding means that grind off or remove the corresponding irregularities on areas that develop the radial force variations above the given level are rendered effective by the logic circuitry to grind these areas when they present themselves, subsequent to being sensed or graded, to the grinders. The memory devices are allocated to respective areas on the circumference of the tire treads so that the variation signals developed by the individual areas are memorized by corresponding memory elements which in conjunction with the logic circuitry make certain that the grinders are activated and grind their corresponding areas only and to the extent necessary to make the area conform to the selected radial force level.
Inventors
- 👤 H Takagi
- 👤 M Shirai
- 👤 T Toshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:52
CPC Classifications
G; G01; G01M; G01M17/00; G01M17/007; G01M17/02; G01M17/022; G01M17/024; B; B24; B24B; B24B49/00; B24B49/16; B24B49/165; B24B5/00; B24B5/36; B24B5/366; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0633; G01M1/00; G01M1/14; G01M1/16; G01M1/28; G01M1/30; G01M1/34; B29D2030/0634; B29D2030/0635; B29D2030/0638
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
293 words
Apparatus for improving the radial force uniformity of a pneumatic tire comprising, a plurality of memory means each representative of an individual, respective area on the circumference of a pneumatic tire whose radial force uniformity is to be improved, the areas represented by individual memory means being different areas and corresponding jointly to the peripheral area on the treads of the tire, means to sense said tire during rotation thereof in a loaded condition to develop automatically signals representative of radial force variations over a given level, means applying said signals representative of radial force variations over a given level to said memory means for storage therein, abrading means rendered effective automatically under control of said memory means to abrade on the periphery of said tire at periods corresponding to the periods and areas on the circumference of said tire developing the radial force variations above said level present themselves to said abrading means for abrading thereof, and means cooperative with said memory means rendering said abrading means effective only after the termination of the development of the corresponding signals representative of the radial force variations of the tire, said means cooperative with said memory means rendering said abrading means effective including a plurality of logic gates, each of said logic gates corresponding to one of the individual, respective areas on the circumference of the tire, means applying said signals representative of radial force variations stored in said memory means to said logic gates, means for sequentially applying input signals to said logic gates to enable ones of said logic gates receptive of said stored signals representative of radial force variations to develop output signals, and means receptive to said logic gate output signals for rendering said abrading means effective in response thereto.
Claim 2
Dependent Claim
293 words
Apparatus for improving the radial force uniformity of a pneumatic tire comprising, a plurality of memory means each representative of an individual, respective area on the circumference of a pneumatic tire whose radial force uniformity is to be improved, the areas represented by individual memory means being different areas and corresponding jointly to the peripheral area on the treads of the tire, means to sense said tire during rotation thereof in a loaded condition to develop automatically signals representative of radial force variations over a given level, means applying said signals representative of radial force variations over a given level to said memory means for storage therein, abrading means rendered effective automatically under control of said memory means to abrade on the periphery of said tire at periods corresponding to the periods and areas on the circumference of said tire developing the radial force variations above said level present themselves to said abrading means for abrading thereof, and means cooperative with said memory means rendering said abrading means effective only after the termination of the development of the corresponding signals representative of the radial force variations of the tire, said means cooperative with said memory means rendering said abrading means effective including a plurality of logic gates, each of said logic gates corresponding to one of the individual, respective areas on the circumference of the tire, means applying said signals representative of radial force variations stored in said memory means to said logic gates, means for sequentially applying input signals to said logic gates to enable ones of said logic gates receptive of said stored signals representative of radial force variations to develop output signals, and means receptive to said logic gate output signals for rendering said abrading means effective in response thereto.
Claim 3
Dependent Claim
195 words
Apparatus for improving the radial force uniformity of a pneumatic tire comprising, means to rotate a tire under a loaded condition simulating the road operation conditions, detection means to detect dynamic radial force variations developed by said tire exceeding a given level and means developing signals representative of said radial force variations exceeding said given level, memory means connected to said detection means corresponding to individual areas circumferentially of said tire memorizing which areas developed said radial force variations exceeding said given level, said areas comprising contiguous, next adjacent areas circumferentially of said tire, and means under control of said memory means including means removing irregularities from the corresponding areas which developed said radial force variations exceeding said given level thereby to render uniform the radial forces developed by said tire when in use, and including a plurality of gates receptive of memory means contents representative of which areas developed said radial force variations exceeding said given level, means for sequentially applying enabling signals to said gates to enable said gates receptive of said memory means contents to develop output signals, and means enabling said means removing irregularities in response to said gate output signals.
Claim 4
Dependent Claim
195 words
Apparatus for improving the radial force uniformity of a pneumatic tire comprising, means to rotate a tire under a loaded condition simulating the road operation conditions, detection means to detect dynamic radial force variations developed by said tire exceeding a given level and means developing signals representative of said radial force variations exceeding said given level, memory means connected to said detection means corresponding to individual areas circumferentially of said tire memorizing which areas developed said radial force variations exceeding said given level, said areas comprising contiguous, next adjacent areas circumferentially of said tire, and means under control of said memory means including means removing irregularities from the corresponding areas which developed said radial force variations exceeding said given level thereby to render uniform the radial forces developed by said tire when in use, and including a plurality of gates receptive of memory means contents representative of which areas developed said radial force variations exceeding said given level, means for sequentially applying enabling signals to said gates to enable said gates receptive of said memory means contents to develop output signals, and means enabling said means removing irregularities in response to said gate output signals.
Claim 5
Dependent Claim
37 words
Apparatus for improving the radial force uniformitY of a pneumatic tire according to claim 2, in which said means to sense comprises load cells loaded variably in dependence upon irregularities in said tire developing radial force variations.
Claim 6
Dependent Claim
61 words
Apparatus for improving the radial force uniformity of a pneumatic tire according to claim 2, in which said detection means comprises means to apply said signals to said memory means when said radial force variations exceed said given level, and in which said memory means comprises a plurality of flip-flops assuming a selected binary condition when said signals are applied thereto.
Claim 7
Dependent Claim
36 words
Apparatus for improving the radial force uniformity of a pneumatic tire according to claim 2, in which said means under control of said memory means comprises control means operated to control said means removing said irregularities.
Claim 8
Dependent Claim
25 words
Apparatus for improving the radial force uniformity of a pneumatic tire according to claim 2, in which said means removing said irregularities comprises abrading means.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |