Hydraulic brake booster having independent reserve systems
AssigneeThe Bendix Corporation
InventorArthur K. Brown
Life of this patent
Estimating the term…
Abstract
A hydraulic brake booster provides two independent accumulators for assisting a brake application when insufficient pressure is communicated to the hydraulic brake booster for braking. The first accumulator is connected to the hydraulic brake booster housing, and the second accumulator is remotely disposed to the housing with a conduit forming a connection therebetween. A spool valve, slidably mounted in the housing, is engageable with a pair of check valves to communicate the first and second accumulators with a pressure chamber within the housing. A pair of bores within the housing receive the check valves and a unitary relief and charging valve is slidably carried in each bore for communicating an inlet port with each accumulator.
Claims9
A hydraulic brake booster comprising:
- a housing defining a pressure chamber;
- a spool valve slidably mounted within the housing;
- said spool valve being movable to open and close communication to the pressure chamber;
- a piston forming a portion of the pressure chamber and being responsive to the pressure within the pressure chamber to move relative to the housing for actuating braking;
- a first accumulator connected to the housing and communicating with the pressure chamber when the pressure in the pressure chamber is below that required to move the piston;
- and
- a second accumulator communicating with the pressure chamber when the pressure in the pressure chamber is below that required to move the piston.
A hydraulic brake booster comprising:
- a housing having an inlet port and defining a pressure chamber;
- a valve movable within said housing to open and close communication between the inlet port and the pressure chamber;
- a piston responsive to the pressure within the pressure chamber to move relative to the housing for actuating braking;
- and
- a plurality of accumulators communicable with the inlet port to store pressurized fluid from the inlet port in each of said accumulators, said plurality of accumulators being communicable with the pressure chamber through separate independent passages and each separate independent passage carries a check valve whereby said valve is movable within the housing to cooperate with each check valve to open communication between the pressure chamber and said plurality of accumulators.
Dependencies are inferred from the claim text.