Servo booster for vehicle braking systems
AssigneeGirling Limited
InventorAlfred W. Thomas
Life of this patent
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Abstract
In a tandem servo booster provided with a pair of ties extending through the housing and diaphragm assemblies for transmitting braking reaction forces from the master cylinder housing directly to the vehicle bulkhead, the ties are tubular and are provided with axially spaced ports to provide fluid communication between pairs of alternate booster chambers. In another construction both ties provide fluid communication between the same two booster chambers, and the other two chambers are connected together by a tubular member which is secured to the diaphragm support plate of the front diaphragm assembly and extends rearwardly through a partition wall of the housing positioned axially between the two diaphragm assemblies.
Claims12
A servo booster assembly for a vehicle braking system comprising a housing, opposed housing walls of said housing, a movable wall positioned intermediate said opposed housing walls and dividing the interior of said housing into two chambers, an output member, an input member, a control valve assembly controlling the differential pressure of said chambers, said movable wall being arranged to apply a force to said output member when the movable wall is subjected to a pressure differential, a stationary force transmitting means extending between said opposed housing walls and through said movable wall, and means sealing said movable wall to said force transmitting means, said force transmitting means being formed with a passage.
Dependencies are inferred from the claim text.