US3887040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake lining thickness monitoring device
Assignee: Mannesmann VDO AG
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Filing: 1973-11-08
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Granted: 1975-06-03
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Expires: 1993-11-08
Abstract
Abstract A device for monitoring the thickness of a wearable lining, such as a brake lining in vehicles with an available power source, while in operative attachment to a movable support such as a brake shoe, comprising two monitoring parts, a resistance detector and a slider contacting an indicator; said two members assembled to move relative to each other on a common longitudinal axis with a protective resilient sleeve surrounding the junction of said two members; one of the members carrying the resistance detector and the other the frictional contact, with at least one carrying the monitoring part which is mounted in operative engagement with the brake shoe. The varying thickness of the brake lining deleted by the amount of displacement of the brake shoe is measured by the resistance detector. In preferred embodiments of the invention the two members are telescoping one into the other. Preferably each member is provided with a carrying arm for its monitoring part and means are provided to permit a quick simple mating attachment between the two monitoring parts and the respective carrying arms. The two monitoring parts are mounted between the brake shoe and a brake saddle and a stop boss is provided at least on one of the two telescoping members spaced a distance from the carrying arm corresponding to the thickness of the lining.
Inventors
- 👤 Ernst-Ulrich Simon
- 👤 Horst Ullrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:04
CPC Classifications
F; F16; F16D; F16D66/00; F16D66/02; F16D66/021; F16D66/026
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
A device for monitoring the thickness of a brake lining of a disc brake, having a disc with a brake shoe and lining on each side thereof, particularly in automotive vehicles provided with a power source, comprising: two monitoring parts, a resistance and a slider; an indicator of the thickness of the brake lining; two telescoping members, mounted for relative axial movements one within the other externally of the said brake shoe and perpendicularly thereto; a resilient protective sleeve surrounding the junction of said two telescoping members; said resistance carried by one said telescoping member; said slider carried by the other said telescopic member; at least one of said two monitoring parts mounted in operative engagement with the outer side of said disc.
Claim 2
Independent Claim
123 words
A device for monitoring the thickness of a brake lining of a disc brake, having a disc with a brake shoe and lining on each side thereof, particularly in automotive vehicles provided with a power source, comprising: two monitoring parts, a resistance and a slider; an indicator of the thickness of the brake lining; two telescoping members, mounted for relative axial movements one within the other externally of the said brake shoe and perpendicularly thereto; a resilient protective sleeve surrounding the junction of said two telescoping members; said resistance carried by one said telescoping member; said slider carried by the other said telescopic member; at least one of said two monitoring parts mounted in operative engagement with the outer side of said disc.
Claim 3
Independent Claim
123 words
A device for monitoring the thickness of a brake lining of a disc brake, having a disc with a brake shoe and lining on each side thereof, particularly in automotive vehicles provided with a power source, comprising: two monitoring parts, a resistance and a slider; an indicator of the thickness of the brake lining; two telescoping members, mounted for relative axial movements one within the other externally of the said brake shoe and perpendicularly thereto; a resilient protective sleeve surrounding the junction of said two telescoping members; said resistance carried by one said telescoping member; said slider carried by the other said telescopic member; at least one of said two monitoring parts mounted in operative engagement with the outer side of said disc.
Claim 4
Independent Claim
123 words
A device for monitoring the thickness of a brake lining of a disc brake, having a disc with a brake shoe and lining on each side thereof, particularly in automotive vehicles provided with a power source, comprising: two monitoring parts, a resistance and a slider; an indicator of the thickness of the brake lining; two telescoping members, mounted for relative axial movements one within the other externally of the said brake shoe and perpendicularly thereto; a resilient protective sleeve surrounding the junction of said two telescoping members; said resistance carried by one said telescoping member; said slider carried by the other said telescopic member; at least one of said two monitoring parts mounted in operative engagement with the outer side of said disc.
Claim 5
Dependent Claim
35 words
A monitoring device as claimed in claim 1, further comprising: a holding pin for the said brake shoe; each said member being provided with a holding arm shaped for attachment with the said holding pin.
Claim 6
Dependent Claim
52 words
A monitoring device as claimed in claim 2, comprising: a hole for the holding pin in the holding arm of each said member and a longitudinal slot orificing into the said hole, having a width which at least in the vicinity of the hole is smaller than the diameter of said hole.
Claim 7
Dependent Claim
25 words
A monitoring device as claimed in claim 1, further comprising: a compression spring positioned between said two telescoping members, supported by one of said members.
Claim 8
Dependent Claim
55 words
A monitoring device as claimed in claim 2, further comprising: a brake saddle; each said holding arm arranged between one brake shoe and the brake saddle and a stop boss provided on at least one of said two members, spaced a distance from the respective holding arm equivalent to the thickness of the brake lining.
Claim 9
Dependent Claim
85 words
A monitoring device as claimed in claim 1, one of said telescoping members being pipe shaped, the other said member comprising a cap and a resistance carrier mounted within the cap axially movably and settably, the free end of said resistance carrier provided with an attachment contact; a guide rail mounted on the other member, opposite from the said slider, which is in contact with the said resistance, said attachment contact mounted slidabLy on said guide rail; said slider arranged in contact with said resistance.
Claim 10
Dependent Claim
28 words
A monitoring device as claimed in claim 6, said pipe shaped member comprising an end closure, the said guide rail and the slider held by the end closure.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |