A fluid damper assembly including a housing that defines a chamber. A rod extends into the chamber and is axially moveable relative to the housing. A bushing is disposed about the rod and is fixed relative to the housing for guiding the rod during the axial movement of the rod. A piston is connected to the rod and is disposed in axially sliding engagement with the housing in the chamber in a compression stroke and in a rebound stroke in response to relative movement between the rod and the housing. A cushioning device extends from the bushing and biases the piston toward the compression stroke for dampening movement of the piston during the rebound stroke of the piston. The cushioning device and the bushing are integral with one another and of a homogeneous material.
The present invention provides a damping device and a method for assembling the damping device. The damping device includes an outer tube and an inner tube disposed concentrically along a center axis defining a chamber, with a diaphragm located between the inner tube and outer tube dividing the chamber. A gas charge seal is secured over the chamber between the outer tube and inner tube. An inner clamp is in a sealing engagement with the inner tube and holds the diaphragm in place. A waist defines a sealing surface adjacent to outer tube. The diaphragm extends from under the inner clamp and through a “U” shaped turn back towards the waist. An upper clamp axially aligns with the waist and holds the diaphragm into the waist of the outer tube, sealing the diaphragm to the outer tube.
F16F 9/092 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid in a chamber with a flexible wall comprising a gas spring with a flexible wall provided between the tubes of a bitubular damper
F16F 9/06 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
F16F 9/08 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid in a chamber with a flexible wall
3.
Hydraulic damper with adjustable rebound valve assembly
A hydraulic damper (1) includes an orifice plate (33) provided with an axial projection (334) and a number of rebound flow passages (332) disposed around the projection (334). A deflectable disc (91) and an elliptical disc (92) is disposed slidably one on top of the other over the axial projection (334) to cover a compression side of the rebound flow passages (332). A cage member (34) is fixed to a piston assembly at the compression side thereof and is provided with at least one passage (341, 343). A compression spring (95) is preloaded between the cage member (34) and the discs (91, 92) to normally close the compression side of the rebound flow passages (332).
F16F 9/34 - Special valve constructionsShape or construction of throttling passages
F16F 9/512 - Means responsive to load action on the damper or fluid pressure in the damper
F16F 9/348 - Throttling passages in the form of annular discs operating in opposite directions
4.
Vibroisolating device with a nonlinear force vs. displacement characteristic and a motor vehicle suspension system comprising such vibroisolating device
A vibroisolating device (1) comprises a substantially elastomeric core (2) configured to be connected with a first displaceable object (3) and provide with an opening (21) configured to be connected with a second displaceable object (4). In order to obtain a nonlinear force vs. displacement characteristic of the device, substantially symmetrical around a certain and adjustable nonzero displacement value, the device (1) comprises at least one Belleville spring (5) disposed on the vibration transmitting path between said first displaceable object (3) and said second displaceable object (4), which is at least partially embedded in the volume of said substantially elastomeric core (2) and surrounds said opening (21). In particular the spring (5) is preloaded while said vibroisolating device (1) is in vibrations equilibrium position. The invention also relates to a motor vehicle suspension, in particular an adjustable active suspension system, comprising such a vibroisolating device.
F16F 9/00 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
B60G 11/38 - Resilient suspensions characterised by arrangement, location, or kind of springs having springs of different kinds including leaf springs and also rubber springs
F16F 1/387 - Springs made of plastics, e.g. rubberSprings made of material having high internal friction with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin comprising means for modifying the rigidity in particular directions
B60G 15/06 - Resilient suspensions characterised by arrangement, location, or type of combined spring and vibration- damper, e.g. telescopic type having mechanical spring and fluid damper
B60G 13/00 - Resilient suspensions characterised by arrangement, location, or type of vibration-dampers
F16F 3/12 - Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction the steel spring being in contact with the rubber spring, e.g. being embedded in it
5.
Hydraulic suspension damper and method of assembling thereof
a) comprising a clamp nut (171, 271) and a shoulder sleeve (172, 272) fixed on the perimeter of the clamp nut. The clamp nut clamps together the components of the valve assembly and the shoulder sleeve preloads the spring with a predetermined force. method of assembling such a damper.
F16F 9/348 - Throttling passages in the form of annular discs operating in opposite directions
F16F 9/32 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium Details
6.
Hydraulic mount apparatus for supporting vibration source
A hydraulic mount apparatus (20) for supporting a vibration source is disclosed. The mount apparatus (20) includes a housing (22) that defines a housing chamber (24) separated by a partition assembly (62) into a pumping chamber (64) and a receiving chamber (66), each containing a magnetorheological fluid (68). A flexible body (48) is partially disposed in the pumping chamber (64) for deforming elastically in response to vibrations caused by an external excitation. A fluid passage (106) extends between the pumping chamber (64) and the receiving chamber (66) for passing the fluid therebetween during low frequency vibrations. A piezostack actuator (118) partially extends into the pumping chamber (64) for moving within the pumping chamber (64) for varying the volume of the pumping chamber (64) to prevent a pressure increase in the pressure chamber to substantially cancel relatively high frequency vibrations.
F16F 13/10 - Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like
F16F 13/26 - Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions
F16F 13/30 - Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids
A magneto-rheological damping assembly including a piston (28) defining a core (38). A pair of spaced electromagnets (46) are disposed about the core (38) and are connected to a controller (48) for selectively generating a magnetic flux. A pair of permanent magnets (52) are disposed about the electromagnets (46) and a pole segment (54;154;56;156) is disposed therebetween. A main gap (74) extends through the piston (28) through which magneto-rheological fluid (26) is conveyed. Flux generated by the magnets controls the viscosity of the fluid in the main gap (74) to control the damping force of the assembly. The controller (48) defines an off operating state for cancelling the flux from the permanent magnets (52) across the main gap (74). The core (38) and the pole segment (54;154;56;156) define a closed auxiliary gap (80) extending axially between the electromagnets (46) and radially between the core (38) and the internal pole segment (56) for preventing leakage of flux across the main gap (74) when the assembly is in the off operating state.
Disclosed is a hydraulic damper assembly, wherein a valve housing (78) having a valve housing bore (88) is disposed in abutting relationship with a bypass insert (68) of a base valve assembly (56) for isolating a bypass passage (70) from a reservoir (36). The valve housing (78) defines a valve housing orifice (128) extending therethrough to define an orifice plane (P). A valve (106) is rotatably disposed within the valve housing bore (88) and defines at least one valve orifice (130) extending therethrough along the plane (P). The valve (106) is rotatable between a closed position and an open position to align the valve orifice (130) and the valve housing orifice (128) whereby a working fluid flows serially through the bypass passage (70) and the valve orifice (130) and the valve housing orifice (128) in the open position. A modulating valve (134) overlays the valve housing orifice (128) for variably and incrementally increasing the fluid flow through the aligned orifices (128, 130) in response to an increase in pressure in the valve housing orifice (128) above a predetermined pressure.
F16F 9/346 - Throttling passages in the form of slots arranged in cylinder walls
F16F 9/10 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid onlySprings, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using a fluid of which the nature is immaterial
F16K 5/10 - Means for additional adjustment of the rate of flow
patents
