GB2139302A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Brake system incorporating a stepping motor
Assignee: Siemens Mobility Ltd
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Filing: 1984-05-02
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Granted: —
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Expires: 2004-05-02
Abstract
Abstract An electro-pneumatic brake system in which an electric brake demand signal controls the energisation of a stepping motor B. The shaft of the motor is threadedly engaged with a captive nut which bears against an abutment carried by a brake controlling valve, the opening of which determines brake actuating pressure downstream of the valve. Rotation of the motor therefore directly controls the brake pressure by movement of the valve. <IMAGE>
Inventors
- 👤 Jack Washbourn
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-30 04:37
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1893; B60T13/00; B60T13/10; B60T13/66; B60T13/68; B60T8/26; B60T8/266; B60T8/32; B60T8/34; B60T8/36
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
An electro-pneumatic brake system in which an output pneumatic pressure is determined by the opening of a pneumatic valve, subject to a source of pneumatic pressure, in accordance with an electrical signal connected to energise a stepping motor having an output shaft, stepwise rotatable to control the opening of the pneumatic valve.
Claim 2
Dependent Claim
52 words
An electro-pneumatic brake system in which an output pneumatic pressure is determined by the opening of a pneumatic valve, subject to a source of pneumatic pressure, in accordance with an electrical signal connected to energise a stepping motor having an output shaft, stepwise rotatable to control the opening of the pneumatic valve.
Claim 3
Dependent Claim
47 words
A brake system as claimed in Claim 1 wherein there are two relatively movable members, a first member movable in an axial direction upon rotation of the second member, and the first member is connected to the valve and the second member is connected to the motor.
Claim 4
Dependent Claim
21 words
A brake system as claimed in Claim 2 wherein the two relatively movable members comprise a threadedly engaged nut and shaft.
Claim 5
Dependent Claim
30 words
A brake system as claimed in Claim 3 wherein the threaded shaft is integral with the output shaft of the motor and the nut is constrained for relative axial movement.
Claim 6
Dependent Claim
27 words
A brake systen as claimed in any preceding claim wherein the value has an abutment against which the axially movable member is urged to effect valve movement.
Claim 7
Dependent Claim
33 words
A brake system as claimed in any claim including a stop arranged to iimit movement of the axially movable member and the position of the stop is determined by a load dependent signal.
Claim 8
Dependent Claim
33 words
A brake system as claimed in Claim 6 wherein the stop comprises a further member engaged with and movable in a transverse direction with respect to a slot in the axially movable member.
Claim 9
Dependent Claim
35 words
A brake system as claimed in Claim 7 wherein the further member comprises a tapered member carried by a piston movable said transverse direction, the piston of which is determined by a load dependent signal.
Claim 10
Dependent Claim
14 words
An electro-pneumatic brake system substantially as hereinbefore described with reference to the accompanying drawings.
Claim 11
Dependent Claim
14 words
An electro-pneumatic brake system substantially as hereinbefore described with reference to the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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