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| Number | Title | Issue Date |
| 7308910 | Device for damping pressure surges A device for damping pressure surges in a fluid with a housing (10) and a piston (14) that can be longitudinally displaced inside the housing (10) against the pretensioning force of a spring energy store (12). The piston (14) inter... | 12/18/2007 |
| 7246862 | Compressed air treatment device that is designed to be installed in an industrial vehicle A compressed air treatment device is designed to be installed in an industrial vehicle consisting of a motor vehicle that can pull a trailer. The device comprises a set of electropneumatic components that are controlled by an electronic command/control unit which is... | 07/24/2007 |
| 7204266 | Pilot-operated pressure shut-off valve A pilot-operated pressure shut-off valve having a main control piston which, when an upper system limit pressure in the hydraulic system is reached, connects an inlet, via which pressure medium can be fed to a hydraulic system, to an outlet by taking up a first swit... | 04/17/2007 |
| 7080891 | Safety device for an automotive pneumatic system The invention relates to a safety device for an automotive pneumatic system, whereby a safety valve comprising a restoring element is provided. The invention also relates to a method which enables an automotive pneumatic system to operate in a safety mode. Component... | 07/25/2006 |
| 7025083 | Quick closing shut-off valve A quick closing shut-off valve includes an inlet, an outlet and a passage there between. A closing element blocks the passage when in the closed position. The closing element is interconnected to a piston via a pull rod. The piston is positioned within a working cha... | 04/11/2006 |
| 6705339 | Surge check unit for a liquid distribution system A safety check unit for use in a liquid distribution system for preventing damage to a pump and associated components of the system in event of loss in pumping pressure. The unit provides a check component to prevent back-flow of the liquid when the pump is shut dow... | 03/16/2004 |
| 6540308 | Electronic compressed-air processing system A compressed-air processing system, notably for motor vehicles, includes, in a housing, an electromagnetic pressure regulator and a multicircuit safety valve having at least one load circuit connected to it. Each load circuit can be locked separately by a... | 04/01/2003 |
| 6079436 | Energy supply device for a compressed air brake system for commercial vehicles The energy supply device has a compressor for supplying at least one compressed air consumer. On the outlet end, the compressor communicates with a pneumatically controllable outlet valve. Furthermore, two pressure regulating valves are provided, with whi... | 06/27/2000 |
| 6058962 | Flow rate regulating valve of hydraulic pump A flow control valve for a hydraulic pump is disclosed, which is so constructed that a first pilot chamber (101A) and a second pilot chamber (101B) are arranged in a manner to face a piston (102), resulting in the piston (102) varying initial load of a sp... | 05/09/2000 |
| 6041807 | Flow control device of power steering apparatus A flow control device, responsive to the rotational speed of a pump and to load pressure, has a simple structure. And a housing of the flow control device for saving energy can make use of a general pump housing not for saving energy as a common housing. ... | 03/28/2000 |
| 6041808 | Compressed air control device for a source of compressed air on motor vehicles A compressed air control device for a source of compressed air on motor vehicles, forming a unit of an electro-pneumatic unloader, an integrated electro-pneumatic multi-circuit control valve and an air-drier, comprising an inlet and an outlet provided in ... | 03/28/2000 |
| 5678900 | Unloader for a source of air under pressure on vehicles A compressed air unloader for unloading compressed air used in the compressed air braking and suspension circuits of a motor vehicle is disclosed. The unloader includes a housing with an internal air chamber, an air inlet for passing compressed air into t... | 10/21/1997 |
| 5447174 | Pilot stage for pressure control valves A pilot stage for pressure control valves includes an axially displaceable valve piston which bounds a valve chamber axially on one side and includes a valve seat for a closure cone therein. Valve piston has an actuating surface in a pressure chamber that... | 09/05/1995 |
| 5373865 | Non-leaking storage charging valve The invention relates to an accumulator charging valve, which for the connection of an inlet P supplying a hydraulic system 10 to an outlet T when an adjustable upper charging pressure in the hydraulic system 10 is reached and for separating this connecti... | 12/20/1994 |
| 4817660 | Pressure regulating valve The present invention provides a pressure regulating valve which substantially avoids shutoff noises. The pressure regulating valve is designed such that the opening process of the shutoff valve proceeds in two steps. The two-step switching process is mad... | 04/04/1989 |
| 4603708 | Shut-off valve The invention relates to a shut-off valve equipped with two pilot-valves and a main control-piston, the said valve connecting in inlet with an outlet when an upper switching pressure is reached and breaking this connection again when the pressure drops to... | 08/05/1986 |
| 3973581 | Hydraulic pressure control valve A combination of a control piston and pilot spool is slidable in a through passageway between an accumulator chamber and a spring chamber separated by a valve body in the valve housing. The combination slides in response to accumulator pressure causing sh... | 08/10/1976 |
