Patent US3716113A successfully refreshed from Google Patents.
US3716113A
Expired / Lapsed
US
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Warning device for indicating wear of friction pads in disk brake
Assignee: Aisin Corp
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Filing: 1970-10-30
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Granted: 1973-02-13
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Expires: 1990-10-30
Abstract
Abstract EACH FRICTION PAD OF A BRAKE DISK IS PROVIDED WITH A DETECTING SWITCH DEVICE OPERATING TO OPEN A DETECTION CIRCUIT WHEN THE PAD IS WORN TO AN ALLOWABLE WEAR LIMIT THEREBY TO CAUSE A WARNING LAMP TO BE LIT. THE DETECTING SWITCH DEVICE MAY BE A SWITCH OPERATED BY MOVEMENT OF A BACKING METAL SUPPORTING THE FRICTION PAD, A WIRE CUT BY ABRASION THEREOF BY THE BRAKE DISK, OR CONTRACTS RELEASED BY ABRASION OR CONTACT BY THE BRAKE DISK, A SPRING DEVICE IN EACH CASE PREVENTING THE DETECTION CIRCUIT THUS OPENED FROM BEING CLOSED AGAIN.
Inventors
- 👤 T Kobayashi
- 👤 N Sakakibara
- 👤 T Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:25
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D66/00; F16D66/02; F16D66/021; F16D66/022; F16D66/023; F16D66/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |