Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Reexamination Certificate
2005-05-24
2005-05-24
Siconolfi, Robert A. (Department: 3683)
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
C303S113400
Reexamination Certificate
active
06896337
ABSTRACT:
A brake booster having a housing is separated into a first chamber and a second chamber by a wall connected to a hub. The hub has a cylindrical body with an axial bore that retains a control valve for sequentially connecting the first chamber with the second chamber to provide for the equalization of fluid pressure therein to define a first mode of operation and interrupting communication between the first and second chambers while connecting the second chamber to a surrounding environment to allow air to enter into the second chamber and create a pressure differential across the wall to defining a second mode of operation. The pressure differential acts on the wall to develop an output force that pressurize fluid to effect a brake application. The brake booster is characterized by a first input member responsive to a manual input and a second input member responsive to an ECU for moving the control valve from the first mode to the second mode to respectively develop first and second brake applications. A switch carried by the hub is activated during the second brake application to provide the ECU with a first signal confirming the development of the second brake application while an input force applied to the first input member deactivates the switch and provides the ECU with a second signal to terminate the second brake application and place the development of first brake application under the control of an operator.
REFERENCES:
patent: 5586814 (1996-12-01), Steiner
patent: 6033039 (2000-03-01), Dieringer
patent: 6375282 (2002-04-01), Inoue et al.
patent: 2000-313330 (2000-11-01), None
Backhus Amy
LaCosse Mark
Last Walter
Villaire Steve E.
Comstock Warren
McCormick Jr. Leo H
Robert Bosch Corporation
Siconolfi Robert A.
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