Power plants – Pressure fluid source and motor – Pulsator
Patent
1987-09-09
1989-01-03
Look, Edward K.
Power plants
Pressure fluid source and motor
Pulsator
B60T 1120
Patent
active
047947578
ABSTRACT:
A housing (10) contains two cylinder bores (12, 14). In one of the cylinder bores (12) two pistons (16, 18) are arranged one behind the other and are displaceable by an external force (P) to subject a first or second pressure chamber (20, 22) to pressure. Two additional pistons (26, 28) are arranged one behind the other in the other cylinder bore (14) and are each displaceable by the pressure in one of said pressure chambers (20, 22) to subject a third pressure chamber (24) to pressure. Three brake circuit connections (30, 32, 34) are each connected to one of the pressure chambers (20, 22, 24). Three reservoir connections (40, 42, 44) are controlled by piston movements and each connected to one of the pressure chambers (20, 22, 24) for as long as it is pressureless. The third pressure chamber (24) is bordered by only one of the two additional pistons (26). The connection between the third pressure chamber (24) and the associated reservoir connection (44 ) is controlled by the same additional piston (26). The other of the two additional pistons (28) separates from each other chambers (70, 72) which are connected to the first and second pressure chambers (20, 22) respectively. As a result, that one of the additional pistons which borders the third pressure chamber moves on each actuation of the master brake cylinder irrespective of whether all the brake circuits are intact or any one of them has failed.
REFERENCES:
patent: 3800538 (1974-04-01), Jones
patent: 4225022 (1980-09-01), Belart
patent: 4419862 (1983-12-01), Farr
patent: 4505116 (1985-03-01), Weiler
patent: 4505519 (1985-03-01), Muterel
patent: 4706459 (1987-11-01), Burckhardt
Look Edward K.
Lucas Industries Public Limited Company
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