US3638764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brakeshoe for spot-type disc brakes
Assignee: TDK Micronas GmbH
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Filing: 1970-04-23
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Granted: 1972-02-01
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Expires: 1990-04-23
Abstract
Abstract A spot-type disc brakeshoe having a brake lining and a backing plate with the backing plate having lateral lugs, at least one of which is bent toward the brake disc while the others are chamfered to form an acute angle with respect to the actuator piston whereby the brakeshoe will rotate thereby creating an audible signal when the brake lining is worn down and the bent lug contacts the brake disc.
Inventors
- 👤 Hans Joachim Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
F; F16; F16D; F16D66/00; F16D66/02; F16D65/00; F16D65/02; F16D65/04; F16D65/092
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
233 words
A spot-type disc brakeshoe having a carrier plate and a friction lining bonded to said carrier plate, said carrier plate and lining being disposed parallel to and capable of engaging a brake disc comprising: a pair of recesses formed in each of the leading and trailing edges of said carrier plate to form three lugs in each of said edges of said carrier plate extending inwardly a given distance from their associated one of said edges of said carrier plate; at least one surface of the two outside lugs in both edges of said carrier plate being parallel to said disc and in the plane of said carrier plate; the center lug in both edges of said carrier plate having a double bend therein, one bend being toward said disc and the other bend being to dispose the end of said lug in a given plane parallel to said disc between the plane of said disc and the plane of said carrier plate, said given plane of one of said center lugs being closer to said disc than said given plane of the otHer of said center lugs so that upon excessive wear of said lining said one of said center lugs contacts said disc during braking and tilts said carrier plate and said lining toward said disc to create a distinctive noise to warn a driver of excessive wear of said lining.
Claim 2
Dependent Claim
233 words
A spot-type disc brakeshoe having a carrier plate and a friction lining bonded to said carrier plate, said carrier plate and lining being disposed parallel to and capable of engaging a brake disc comprising: a pair of recesses formed in each of the leading and trailing edges of said carrier plate to form three lugs in each of said edges of said carrier plate extending inwardly a given distance from their associated one of said edges of said carrier plate; at least one surface of the two outside lugs in both edges of said carrier plate being parallel to said disc and in the plane of said carrier plate; the center lug in both edges of said carrier plate having a double bend therein, one bend being toward said disc and the other bend being to dispose the end of said lug in a given plane parallel to said disc between the plane of said disc and the plane of said carrier plate, said given plane of one of said center lugs being closer to said disc than said given plane of the otHer of said center lugs so that upon excessive wear of said lining said one of said center lugs contacts said disc during braking and tilts said carrier plate and said lining toward said disc to create a distinctive noise to warn a driver of excessive wear of said lining.
Claim 3
Dependent Claim
39 words
A brakeshoe according to claim 1, wherein said outside lugs associated with said one of said center lugs are tapered toward their associated one of said edges to form an acute angle with the plane of said carrier plate.
Claim 4
Dependent Claim
43 words
A brakeshoe according to claim 2, wherein: each of said tapered outside lugs are formed by grinding a chamfer on the surface of said carrier plate opposite said lining, the length of said chamfer being equal to the length of said center lugs.
Claim 5
Dependent Claim
40 words
A brakeshoe according to claim 3, wherein said carrier plate is formed from sheet metal having a thickness less than the thickness of usual carrier plates used in this type of brake due to said bending of said center lugs.
References Cited (Backward Citations)
US3368519A
Cited
DE1575898A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |