Patent US4207971A successfully refreshed from Google Patents.
US4207971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rust preventing device for a rotor of a disc brake
Assignee: Toyota Motor Corp
•
Filing: 1977-02-14
•
Granted: 1980-06-17
•
Expires: 1997-02-14
Abstract
Abstract A rust preventing device for keeping a rotor of a disc brake from rusting. The rotor has an inner surface and an outer surface covered by a dust shield. The inner surface of the rotor is covered by a rust preventing cover. The rust preventing cover is secured to the dust shield in a snapping manner.
Inventors
- 👤 Masakazu Ishikawa
- 👤 Hiroyuki Oka
- 👤 Juichi Shibatani
- 👤 Yuichiro Obu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:09
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/04; F16D65/092; F16D55/00; F16D55/02; F16D55/22; F16D65/12; F16D2055/0004; F16D2055/0037
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
In an automotive disc brake system comprising a rotor and a permanent stationary dust shield, said rotor having an outer surface adapted to be exposed to the roadway and an inner surface opposite to said outer surface, and said dust shield covering said outer surface of said rotor and having an outer periphery extending radially beyond an outer periphery of said rotor, the improvement comprising prior to normal use of said brake system, a flexible, disposable, paper cover means for partially shielding said rotor surfaces from the atmosphere and preventing rusting of said rotor surfaces, wherein said cover means comprises a flat annular-shaped portion facing the inner surface of said rotor, an outer peripheral portion snapping onto the outer periphery of said dust shield, and is adapted for easy removal prior to normal use of said brake system.
Claim 2
Dependent Claim
138 words
In an automotive disc brake system comprising a rotor and a permanent stationary dust shield, said rotor having an outer surface adapted to be exposed to the roadway and an inner surface opposite to said outer surface, and said dust shield covering said outer surface of said rotor and having an outer periphery extending radially beyond an outer periphery of said rotor, the improvement comprising prior to normal use of said brake system, a flexible, disposable, paper cover means for partially shielding said rotor surfaces from the atmosphere and preventing rusting of said rotor surfaces, wherein said cover means comprises a flat annular-shaped portion facing the inner surface of said rotor, an outer peripheral portion snapping onto the outer periphery of said dust shield, and is adapted for easy removal prior to normal use of said brake system.
Claim 3
Dependent Claim
22 words
An automotive disc brake system as in claim 1, the improvement further comprising said cover means containing a volatile rust preventive therein.
References Cited (Backward Citations)
GB312138A
Cited
US2630368A
Cited
US2588665A
Cited
US2746577A
Cited
US2895270A
Cited
US3161249A
Cited
US3213976A
Cited
US3433577A
Cited
US3530569A
Cited
GB1244599A
Cited
US3901836A
Cited
DE2626338A1
Cited
US4005768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |