Class / Patent application number | Description | Number of patent applications / Date published |
280124158 | Hydraulic and pneumatic | 13 |
20120242057 | VEHICLE WITH HYDRAULICALLY INTERCONNECTED DAMPERS - A damper unit and its employment as part of the suspension system for a vehicle are disclosed. A vehicle of the kind having wheels arranged in left-right pairs has a sprung mass and left and right unsprung masses associated with left and right wheels of a said left-right pair. Respective left and right damper units are mounted between the respective left and right unsprung masses and the sprung mass. Each damper unit has a damper housing defining first and second generally cylindrical chambers therewithin having a common axis. The first and second chambers are separated from each other in the axial direction by an intermediate wall. The first chamber has a first axial end wall at its end remote from the intermediate wall, and the second chamber has a second axial end wall at its end remote from the intermediate wall. A first piston is slidable in sealing engagement with the interior of the first chamber. A second piston is slidable in sealing engagement with the interior of the second chamber. A common damper rod is provided for the first and second pistons, the damper rod being sealingly received through a bore in the first axial end wall, passing axially through the first chamber, and being sealingly received through a bore in the intermediate wall. The respective damper rods of the left and right damper units are arranged for movement into and out of the damper housing as their respective unsprung masses move relative to the sprung mass, the chamber defined between the first piston and the first axial end wall of each damper unit being coupled to the chamber defined between the first piston and the intermediate wall of the other damper unit via at least one restriction, whereby the first chambers of the damper units provide stiffness in roll. Each damper unit is provided with connections between its second chamber and the exterior of the respective damper unit on either side of its second piston to provide coupling for fluid within its second chamber with apparatus external to the damper unit to provide stiffness in heave. | 09-27-2012 |
20130249184 | MOUNTING BRACKET ASSEMBLY FOR VEHICLE SUSPENSION COMPONENT AS WELL AS SUSPENSION ASSEMBLY, KIT AND METHOD INCLUDING SAME - A mounting bracket assembly, such as for securing a suspension component to a receiving element of sprung or unsprung mass of a vehicle, can include an internal mounting element. An external mounting element can be secured to the receiving element using a securement element. A suspension assembly for a vehicle and a method of assembly including such a mounting bracket assembly are also included. A mounting bracket kit is also included. | 09-26-2013 |
20150115563 | METHODS AND APPARATUS FOR CONTROLLING A FLUID DAMPER - A spring for a suspension is described. The spring includes: a spring chamber divided into at least a primary portion and a secondary portion, and a fluid flow path coupled with and between the primary portion and the secondary portion. The fluid flow path includes a bypass mechanism, wherein the bypass mechanism is configured for automatically providing resistance within the fluid flow path in response to a compressed condition of the suspension. | 04-30-2015 |
280124159 | Fluid handling details | 10 |
20090020975 | Suspension Structure for a Work Machine - An arrangement is provided in which the durability of an operation changing means is improved when this means is provided to the suspension mechanism in a suspension structure for a work vehicle. A maximum position (A | 01-22-2009 |
20090102154 | AIR SUSPENSION SYSTEM - An air suspension system includes a first transfer pipe having one end communicating with the outside, the first transfer pipe being constructed such that air flows through the first transfer pipe; a filter mounted adjacent to the one end of the first transfer pipe to filter out foreign matter from the air; a compressor mounted on the first transfer pipe, such that the compressor is located adjacent to the filter, to compress the air; a dryer mounted on the first transfer pipe, such that the dryer is located adjacent to the compressor, to dry the air; an exhaust pipe extending from the first transfer pipe between the compressor and the dryer; an exhaust valve mounted on the exhaust pipe to control the flow of the air; a second transfer pipe communicating with the other end of the first transfer pipe; a control unit connected to the second transfer pipe, the control unit being constructed such that the high and low of the control unit are controlled by the pressure of the air; and a storage unit connected to the second transfer pipe to store the compressed air. | 04-23-2009 |
20090189363 | Gas Pressure Shock Absorber - The invention relates to a gas pressure shock absorber for vehicle chassis having a damper tube ( | 07-30-2009 |
20110316248 | CLOSED RIDE CONTROL SYSTEM FOR VEHICLES - A closed ride control system for vehicles by which a vehicle body is suspended with respect to at least one vehicle axle and which includes the following components: pressure medium chambers which are connected via branches to a pressure medium line, a compressor, an air dryer which is arranged in a pressure medium line, a pressure medium reservoir which is connected via the compressor to the pressure medium chambers, and a non-return valve arranged in the pressure medium line between an outlet of the air dryer and the directional valve in order to connect the outlet of the air dryer to the pressure medium reservoir. | 12-29-2011 |
20120146307 | MULTIPLE RIDE HEIGHT CONTROL APPARATUS FOR AIR SUSPENSION - A multiple ride height control apparatus for an air suspension system having an air spring to be installed between a frame/body and a suspension arm in order to adjust the ride height, by filling and exhausting a compressed air, said apparatus comprises a mechanical leveling valve for controlling a filling and exhausting said compressed air by adjusting its mounting angle, being rotated clockwise and counterclockwise; and a valve driver for rotating said mechanical leveling valve to the direction of filling and exhausting said compressed air; and a controller for controlling the operation of said valve driver. | 06-14-2012 |
20130140784 | BIASING AIR SUSPENSION SYSTEM FOR A TRAILER - An air suspension system of a tandem axle assembly for a trailer includes a front axle air spring configured to be coupled to a front axle assembly of the tandem axle assembly and a rear axle air spring configured to be coupled to a rear axle assembly of the tandem axle assembly. The air suspension system further includes an air reservoir in fluid communication with the front axle air spring and the rear axle air spring and a ratio valve in fluid communication with the air reservoir, the front axle air spring, and the rear axle air spring. The ratio valve is positioned between the air reservoir and the front axle air spring. Further, the ratio valve is selectively operable to send a lesser amount of air from the air reservoir to the front axle air spring than to the rear axle air spring. | 06-06-2013 |
20140015215 | Control Arrangement For A Hydropneumatic Suspension System And Hydropneumatic Suspension System Comprising Such A Control Arrangement - A control arrangement for a hydropneumatic suspension system and a hydropneumatic suspension system are provided. The control arrangement has a pressure supply connection, a return connection, a piston chamber connection adapted to be connected to the piston chamber of a suspension cylinder of the hydropneumatic suspension system, an annular chamber connection adapted to be connected to the annular chamber of the suspension cylinder, and at least one controllable valve arrangement comprising a plurality of switch positions via which the pressure supply connection and the return connection are connectable to the piston chamber connection and the annular chamber connection. The annular chamber connection is in flow connection with the return connection via a pressure-limiting line having a hydraulically controllable pressure-limiting element. The pressure-limiting element has a control input adapted to be acted upon via a control line by a control pressure which is limitable to a predefinable pressure limit. | 01-16-2014 |
20140300075 | VEHICLE SUSPENSION SYSTEM WITH RESERVOIR FOR AIR SPRING DAMPING - A suspension system can include an air spring, an air reservoir external to the air spring, and a flow control device which variably restricts flow of air between the air spring and the air reservoir. Flow between the air spring and the air reservoir may be permitted in response to compliance of the suspension system, and the air spring can have an internal air volume at least 2½ times as great as a volume of the air reservoir. The flow control device may permit flow between the air spring and the air reservoir in response to a predetermined pressure differential level across the flow control device. Multiple air reservoirs can be internal to an axle, and can be isolated from each other in the axle. | 10-09-2014 |
20150321533 | ADJUSTABLE BLOW-OFF SUSPENSION - Altering the damping rate of a vehicle suspension damper. A pressure of a damping fluid is exerted against a second valve mechanism connected to the vehicle suspension damper. The pressure of the damping fluid is increased beyond a threshold of the second valve mechanism that is adjustable by an adjustment member. The adjustment member is exposed through a high pressure side of the vehicle suspension damper. The second valve mechanism is then opened. | 11-12-2015 |
20160059664 | ACTIVE SUSPENSION WITH STRUCTURAL ACTUATOR - An active suspension system is configured in a strut arrangement. The active suspension system comprises a hydraulic actuator and a hydraulic pump/electric motor assembly, wherein the actuator movement is preferably in lockstep with the hydraulic motor-pump and electric motor-generator combination. Torque in the electric motor is instantaneously controlled by a controller to create an immediate force change on the hydraulic actuator. The hydraulic actuator is configured so that it can be used as a strut whereby the actuator has sufficient structural rigidity to carry the applied suspension loads while capable of supplying damper forces in at least three quadrants of the force velocity graph of the suspension actuator operation. Embodiments disclosed include low cost active suspension systems for a MacPherson strut application. | 03-03-2016 |