Electrically controlled brake actuator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 19, 1991
Issued Date -
N/A
app pub date -
Jun 22, 1989
filing date -
Mar 26, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The actuator (10) of a brake, such as a disc brake, is controlled by an electric motor (34) which drives a pump (38, 50, 62) ensuring that the pressure of the brake fluid in a control chamber (44) rises. A crankshaft (38) driven by the electric motor (34) imparts a to-and-fro movement to a plunger piston (50) in a pumping chamber (62). This chamber (62) communicates with a brake-fluid reservoir via an intake duct (74) controlled by way of a valve (76, 78) and with the chamber (44) via a delivery duct controlled by way of a valve (58, 60). Furthermore, the control chamber (44) communicates with the reservoir via a recycling duct (80) controlled by way of a solenoid valve (82). The entire hydraulic circuit so formed is accommodated in the body (12) of the actuator.
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