Piston pump

Details Piston pump Piston pump

1998-10-09

2000-09-05

Walberg, Teresa

Pumps

Expansible chamber type

Having separate noncyclic valve

417434, 417554, 60453, 92 79, F04B 2300

Patent

active

061133655

ABSTRACT:
The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. The piston pump has a piston which is driven to execute a stroke motion, and two check valves as an inlet valve and outlet valve for controlling the fluid flow through the piston pump. The outlet valve has a valve closing spring that effects a fast closure of the outlet valve. To enable completely evacuating a positive displacement chamber of the piston pump, the invention includes connecting an evacuation valve, embodied as a springless check valve with a small diameter and with a lightweight valve closing body, hydraulically parallel to the outlet valve.

REFERENCES:
patent: 5178184 (1993-01-01), Skillman
patent: 5213482 (1993-05-01), Reinartz et al.
patent: 5232273 (1993-08-01), Eckstein et al.
patent: 5353834 (1994-10-01), Schmitt et al.
patent: 5529466 (1996-06-01), Tackett
patent: 5569025 (1996-10-01), Bendel et al.
patent: 5984651 (1999-11-01), Beck et al.
patent: 6000764 (1999-12-01), Dokas

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