Class / Patent application number | Description | Number of patent applications / Date published |
180432000 | With plural working members | 6 |
20080251310 | Vehicle Steering System - A vehicle steering system for motor vehicles has a steering handle operable by the driver and connected to steerable vehicle wheels in terms of effect to determine a direction of driving. The vehicle steering system includes a hydraulic working cylinder having two directions of effect, as well as a hydraulic pressure source, which applies hydraulic pressure to a valve assembly. The valve assembly controls the magnitude of the hydraulic pressure conveyed to the working cylinder and determines the direction of effect of the working cylinder. The valve assembly has two separated valves, the first valve determining the direction of effect of the working cylinder, while the second valve controls the working pressure for the hydraulic working cylinder. | 10-16-2008 |
20100155172 | HYDRAULIC POWER STEERING APPARATUS - A hydraulic power steering apparatus for a vehicle is disclosed. The hydraulic power steering apparatus for a vehicle forms a working fluid film between a piston reciprocating within a cylinder tube and a piston ring in order to provide an accurate auxiliary steering force by preventing leakage of a working fluid between right and left cylinders during the operation of a steering wheel by the driver. | 06-24-2010 |
20120222911 | METHOD AND APPARATUS FOR USE IN TURNING STEERABLE VEHICLE WHEELS - An apparatus ( | 09-06-2012 |
20120312624 | POWER STEERING GEAR ASSEMBLY - A power steering gear assembly | 12-13-2012 |
20130341116 | POWER STEERING APPARATUS - An apparatus ( | 12-26-2013 |
20140069734 | POWER STEERING APPARATUS - An apparatus for use in turning steerable vehicle wheels includes a power steering motor assembly connected with the steerable vehicle wheels. A first pump connected with the power steering motor assembly is continuously driven by an engine of the vehicle to supply fluid under pressure to the power steering motor assembly. A second pump connected with the power steering motor assembly is continuously driven by an engine of the vehicle. A valve connected with the power steering motor assembly and the second pump directs fluid flow from the second pump to at least one of the power steering motor assembly and reservoir during operation of both the first pump and the second pump. A pumping mechanism includes a first pumping area defining the first pump and a second pumping area defining the second pump. The first pumping area is smaller than the second pumping area. | 03-13-2014 |