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| Number | Title | Issue Date |
| 7610935 | Fluid controller The invention provides a fluid controller, e.g. for a hydrostatic power steering. The controller comprises a cylindrical valve member cooperating with a housing to define at least one fluid path from a pressure source to a steering cylinder. The valve member is rota... | 11/03/2009 |
| 7516757 | Power beyond steering system A fluid controller (15a) in a multiple-input hydrostatic power steering system includes a check valve assembly (101), having a first fluid passage (111), defining a check valve seat (105) and a check valve (103) operably ass... | 04/14/2009 |
| 7490626 | Steer valve with hydraulic vehicle position feedback A fluid controller (17) controls a main fluid path (18) from a pump (11) to a primary steering cylinder (19) and a second fluid path (26) from a fluid meter (37) to a second cylinder (31). A mechanical or electrical l... | 02/17/2009 |
| 7322375 | High bandwidth rotary servo valves A valve includes a rotating, substantially pressure-balanced spool that selectively aligns openings within the spool with openings within a sleeve to selectively connect ports of a manifold for gas or liquid routing. A valve may also include a stem, a needle coupled... | 01/29/2008 |
| 7231940 | Control valve for a hydraulic power steering system A control valve for a hydraulic power steering system includes a pair of flow circuits arranged in parallel. Each flow circuit includes an upstream and downstream flow orifices arranged in series. Each set of orifices defines between the orifices an intermediate pre... | 06/19/2007 |
| 7199536 | Power steering device An electric power steering apparatus provides stable steering assist force by positively precluding actuation of an electric motor while it is rotating in a reverse direction, so as to prevent demagnetization of the electric motor. A motor reverse rotation detecting... | 04/03/2007 |
| 7152627 | Control valve for a hydraulic power steering system A control valve for a hydraulic power steering system includes a pair of flow circuits arranged in parallel. Each flow circuit includes an upstream and downstream flow orifices arranged in series. Each set of orifices defines between the orifices an intermediate pre... | 12/26/2006 |
| 7140179 | Valve An apparatus comprises a valve body having a cylindrical bore centered on an axis. A cylindrical core extends axially within the bore and is fixed relative to the valve body. A sleeve within the bore extends circumferentially about the core and is rotatable about th... | 11/28/2006 |
| 7127912 | Multi-chambered container with collared O-ring A modified multi-chambered container including a container body defining a central (e.g., liquid) chamber, a neck defining an opening to the central chamber, a flange extending upward from the neck, and a groove formed in the neck around the first opening. A collare... | 10/31/2006 |
| 7121435 | Spray can holding an actuating device A spray can holding and actuation device comprises a rim engagement element and a locking mechanism for compressing the rim engagement element against the rim surrounding the push-button valve on the can. The rim engagement element includes a compressible collar tha... | 10/17/2006 |
| 7107952 | Actuating device for securing a camshaft of an engine of a motor vehicle in a start position An actuating device for hydraulically securing a camshaft of an engine of a motor vehicle in a start position has a solenoid valve controlling the flow of a pressure medium to a camshaft adjuster with a rotary slide valve that is fixedly connected to the camshaft an... | 09/19/2006 |
| 7100638 | Valve for a hydraulic power steering In a valve for a hydraulic power steering, comprising a first valve element and a second valve element which from a central position can be rotatably displaced relative to each other to a limited extent in the one or other direction in order to generate a steering a... | 09/05/2006 |
| 7089960 | Ball valve The present invention is a ball valve which may be attached to a fluid pipe for connection/disconnection between an entrance and an exit. More particularly, the present invention is a ball valve having a discharge orifice communicating with ambient air in addition t... | 08/15/2006 |
| 7025091 | Power steering control valve An improved structure a control valve for a power steering gear includes a valve sleeve having a plurality of lands and a valve core rotatable within the valve sleeve and having a plurality of lands. At least one land of the valve core and at least a pair of lands o... | 04/11/2006 |
| 6769249 | Low slip steering system and improved fluid controller therefor A fluid controller (27) for use with a fluid pressure operated device (45) having an inlet (47) and an outlet (49) and defining a fluid leakage path therebetween. The controller (27) includes valving (61) defining a main flu... | 08/03/2004 |
| 6397889 | Method for mounting a rotary valve for power assisted steering systems, especially for motor vehicles A method for assembling a rotary valve for hydraulic power assisted steering systems may be used for a rotary valve having the following features: both valve elements of the rotary valve have longitudinal control grooves, interacting control edges of the ... | 06/04/2002 |
| 6254082 | Rotary valve A rotary valve is interposed between an intake pump and an exhaust pump for supplying an air, and at least one suction head or one nozzle that performs a predetermined operation upon reception of the air supplied from the intake and exhaust pumps, to supp... | 07/03/2001 |
| 6240961 | Hydraulic power steering control valve A hydraulic fluid control valve (18) for a power steering gear (10) includes first and second relatively rotatable valve members (60, 62) which direct hydraulic fluid to flow between the valve members (60, 62) from inlet ports (70) to outlet ports (92). T... | 06/05/2001 |
| 6213247 | Hydraulic steering device and method for steering a vehicle A hydraulic steering device, in particular for vehicles, is disclosed, having a housing in which two sliders are arranged to move relative to one another and together form at least one adjustable throttle, a restoring device for restoring the two sliders ... | 04/10/2001 |
| 6213149 | In-line diversion valve with flow-through capability An in-line diversion valve including a body and a plug assembled with the body. The body has an annular run extending axially from a first end opening configured to define a first port to a second end opening, and at least one annular branch extending rad... | 04/10/2001 |
| 6016837 | Steering valve with closed center In order to reduce the number of components required and increase the service life by preventing friction resulting from large-diameter seals, a steering valve (1) is provided which has a closed center for supplying hydraulic pressure to an actuator and w... | 01/25/2000 |
| 6000431 | Servo valve This invention relates to a servo valve which is constructed in the manner of a slide valve and particularly in the manner of a rotary slide valve. For changing the control characteristics the width of control gaps can be changed which exists in a normal ... | 12/14/1999 |
| 5992458 | Load reaction steering unit for unequal area cylinder A fluid controller (15) of the type which controls the flow of fluid to an unequal area steering cylinder (25), wherein the controller is of the load reaction type. The controller (15) includes valving (27) which, when it is in neutral (FIGS. 1 and 5), de... | 11/30/1999 |
| 5975138 | Fluid controller with improved follow-up A fluid controller (15) of the type having a primary, spool valve (43) and a followup, sleeve valve (45) which define a relative neutral position (FIG. 1) and first and second maximum, opposite operating positions (L and R). The controller includes a flui... | 11/02/1999 |
| 5970708 | Hydraulic steering assembly with change in transmission ratio and flow amplification In order to continuously change the transmission ratio between power-assisted steering mode and emergency steering mode and to maximize the flow of hydraulic oil in the power-assisted steering mode when the steering wheel is rapidly turned, a steering ass... | 10/26/1999 |
| 5934405 | Power steering control valve A vehicle steering apparatus (10) includes a fluid motor (42) having first and second chambers (44, 46). A relatively rotatable, coaxial valve core (22) and valve sleeve (24) control the fluid pressure in the chambers (44, 46). The valve sleeve (24) has f... | 08/10/1999 |
| 5881771 | Rotary valve for power steering gear A low noise rotary valve for a hydraulic power steering gear that offers flexibility in the design of its boost characteristic has inlet ports to receive hydraulic fluid from a pump, return ports to return hydraulic fluid to the pump, and cylinder ports t... | 03/16/1999 |
| 5878780 | Power steering gear valve A low noise rotary valve for a hydraulic power steering gear offering flexibility in the design of the boost characteristic has inlet ports to receive hydraulic fluid from a pump, return ports to return hydraulic fluid to the pump, and cylinder ports to c... | 03/09/1999 |
| 5868165 | Rotary metering-pin servovalve and method of manufacturing the same A rotary servovalve having a cylindrical spool (18), which rotates through a limited angle, positioned within a housing (16). The spool and housing have transverse holes through both parts with matching position and diameter. The holes in the housing form... | 02/09/1999 |
| 5799694 | Steering control unit A fluid controller (11) of the type comprising a rotatable spool valve (31) and a relatively rotatable follow-up sleeve valve (33), in which fluid flows through a fluid meter (15) of the type in which a star member (39) orbits and rotates as fluid flows t... | 09/01/1998 |
| 5711345 | Method and apparatus for forming a control valve for hydraulic circuits Methods and machining apparatus for indexing and forming spool and pinion shafts for use in a rotary control valve of a power steering system are disclosed. In particular, the methods include forming a contoured spool shaft extension on an end of a spool ... | 01/27/1998 |
| 5697400 | Steering valve In order to be able to more simply manufacture and center a steering valve consisting of an input shaft, an output shaft, a valve sleeve surrounding the input shaft, and a reaction arrangement to which pressure can be applied to generate a centering momen... | 12/16/1997 |
| 5680804 | Steering valve with activation threshold A steering valve (1) for supplying an actuator with hydraulic pressure, consists of an input shaft (2), an output shaft (3), a torque rod (4), connected at one end to the input shaft (2) and at the other end to the output shaft (3), and a valve sleeve (5)... | 10/28/1997 |
| 5645107 | Hydraulic pressure control valve A hydraulic pressure control valve includes a cylindrical valve body and a valve spool coaxially fitted therein, each having oil grooves and lands alternately provided on and along the respective peripheral inside and outside surfaces, the opposing oil gr... | 07/08/1997 |
| 5638864 | Steering control unit with flow amplification for unequal area cylinder A fluid controller (15) for use with an unequal area cylinder (25) having a rod end area A and a head end area B. The controller valving (27) includes, in one embodiment, a flow amplification path (101) for only one direction of steering. In another embod... | 06/17/1997 |
| 5634495 | Wide angle controller with dual function check valves A fluid controller (17) having a housing (21) and valving including a spool (41) and a follow-up sleeve (43). The spool and sleeve define a central reference plane (RP) with the housing having two annular chambers (61, 62) receiving pressurized fluid from... | 06/03/1997 |
| 5620026 | Fluid controller and improved backflow prevention therefor A fluid controller (17) is disclosed of the type including a relatively rotatable valve spool (95) and valve sleeve (97) which define a series of variable control orifices (71-76) during normal steering operations. Fluid flow to a control port (27) is con... | 04/15/1997 |
| 5582207 | Steering control valve with flow gaps which change relative size for noise suppression A valve (10) for controlling flow of hydraulic fluid. The valve (10) includes first and second valve members (80, 82), each having a plurality of lands and grooves. The valve members (80, 82) are relatively movable from a neutral position to a displaced p... | 12/10/1996 |
| 5562124 | Steering control valve with different size flow gaps for noise suppression A valve (10) for controlling flow of hydraulic fluid. The valve (10) has first and second valve members (80, 82) which have a plurality of lands and grooves. The valve members (80, 82) are relatively movable from a neutral position to a displaced position... | 10/08/1996 |
| 5467800 | Low inertia servo valve A rotary servo valve includes a valve body having a longitudinal bore therethrough. A sleeve fits into the bore. The wall of the sleeve is perforated by two groups of port openings, each group includes a plurality of sets of radially-disposed ports. In ea... | 11/21/1995 |
