| Patent application number | Description | Published |
|---|
| 20090158924 | PISTON PUMP - The present invention relates to a piston pump for feeding a fluid, having a piston and a pressure chamber which is arranged between an inlet valve and an outlet valve. The inlet valve has a closing element, a spring element for restoring the closing element, and a holding device. The holding device has a holding region for holding and supporting the spring element and an integrally formed sealing region in order to seal the pressure chamber with respect to a low-pressure region of the piston pump. The sealing region is of annular design and has a parting gap which is closed in an installed state. | 06-25-2009 |
| 20090185924 | PISTON PUMP - The invention relates to a piston pump for conveying fluids. The piston pump includes a piston, and a pressure chamber located between an intake valve and a discharge valve. The intake valve is arranged between the pressure chamber and a low-pressure zone of the piston pump. The intake valve has a valve body, a closing element, a device for preloading the closing element, and a device for fastening the intake valve to the piston. The fastening device encompasses at least two fastening elements which protrude from the valve body toward the piston. The fastening elements are positioned at a distance from one another, and are fitted with inlets therebetween for supplying fluid. The invention further relates to a piston pump having an intake valve without a spring-biased element. | 07-23-2009 |
| 20090274568 | PISTON PUMP - A piston pump, having a pump housing in which a pump piston is guided in an axially moving fashion so that when the pump piston is actuated, a fluid is conveyed from a suction side to a pressure side via a pumping chamber that adjoins the pump piston; a region for guiding the pump piston in the pump housing includes a guide ring, which is provided with a sealing section and is affixed to the pump housing. | 11-05-2009 |
| 20100071362 | PRESSURE SYSTEM HAVING AT LEAST TWO PRESSURE CIRCUITS - A pressure system having at least two pressure circuits each including a respective positive-displacement element and each compression side of the positive-displacement elements being in operative communication via a compensation device in such a way that a pressure increase in the first pressure circuit leads to a pressure increase in the second pressure circuit, and the pressure increase of the first pressure circuit is essentially reduced by the amount of the pressure increase of the second pressure circuit, and the reduction in the pressure increase is less than a defined limit value. | 03-25-2010 |
| 20100232994 | PISTON PUMP FOR DELIVERING A FLUID, AND ASSOCIATED BRAKE SYSTEM - A piston pump includes a piston assembly which has at least one transverse bore which corresponds to a longitudinal bore. The piston pump further includes a cylinder in which the piston assembly is guided in a longitudinally movable manner, and an inlet valve which includes a cage element, in which an inlet valve spring and sealing element are arranged, and a corresponding inlet valve seat which is arranged on the piston assembly. The inlet valve sealing element can be pressed sealingly into the corresponding inlet valve seat by means of a restoring spring in order to close off the longitudinal bore. The restoring spring is designed as a simple cylindrical spiral spring which is supported axially with an upper end winding against the cage element and with a lower end winding against a cylinder base. The cage element has an elastic high-pressure sealing element which, in the direction of a cylinder wall, has a radial support region for holding and centering the upper end winding of the restoring spring. In order to guide the restoring spring, the cylinder has, at the transition between the cylinder wall and the cylinder base, a cylinder base corner radius which is adapted to the lower end winding. | 09-16-2010 |
| 20100232998 | PISTON PUMP FOR DELIVERING A FLUID, AND ASSOCIATED BRAKE SYSTEM - A piston pump includes a piston assembly which has a first piston element, a second piston element, and at least one transverse bore which corresponds to a longitudinal bore. The piston pump further includes a cylinder in which the piston assembly is guided in a longitudinally movable manner, and an inlet valve which includes a cage element, in which an inlet valve spring and sealing element are arranged, and a corresponding inlet valve seat which is arranged on the piston assembly. The inlet valve sealing element can be pressed sealingly into the corresponding inlet valve seat by means of a restoring spring in order to close off the longitudinal bore. The second piston element is configured as a sleeve made of a wear-resistant material, which accommodates axially acting power components. The inlet valve seat is disposed on a bending edge of the second piston element configured as a sleeve. The at least one transverse bore corresponding to the longitudinal bore is placed in the second piston element. The invention further relates to an associated braking system. | 09-16-2010 |
