End member assemblies dimensioned for securement to a flexible spring member for forming a gas spring assembly include first and second end member sections. The first end member section includes a plurality of first ribs disposed in spaced relation to one another such that a plurality of first grooves are formed therebetween. The second end member section is disposed in abutting engagement with the first end member section. The second end member section includes a plurality of second ribs disposed in spaced relation to one another such that a plurality of second grooves are formed therebetween. The plurality of first ribs and/or the plurality of second ribs are dimensioned for permanent deflection into a respectively adjacent one of the plurality of first and/or second grooves upon undergoing a kinetic impact from an associated foreign object. Gas spring assemblies and suspension systems are also included.

A suspension includes: a cylinder; a piston rod including a piston provided at one end-side, and inserted in the cylinder together with the piston; an outer tube part opened at the one end-side, a position of which relative to the piston rod is fixed at the other end-side, and configured to receive therein at least a part of the cylinder; and a tubular rolling diaphragm having one end disposed at the cylinder and the other end fixed to the outer tube part, and configured to roll in conjunction with displacement of the piston rod with respect to the cylinder. The rolling diaphragm becomes convex toward the other end-side of the outer tube part and is accommodated in the outer tube part, upon contraction of the suspension.

The disclosure relates to an air spring, comprising at least one variable volume air chamber for receiving air, and comprising adsorption material which is arranged in the air chamber, wherein there is an adjusting device by means of which, for the variable adjustment of the rigidity of the air spring, a surface of the adsorption material that is in contact with the air received in the air chamber can be adjusted variably.

A method for making an air spring assembly, including the steps of providing a bellow, a support ring, and a guide tube. The support ring is positioned relative to a bellow adapter such that a portion of the bellow adapter extends through the support ring. The bellow is then positioned such that a portion of the bellow extends over the support ring and a portion of the bellow adapter. The guide tube is then positioned relative to the bellow and the support ring, such that a portion of the bellow extends into the guide tube and the guide tube is supported by the bellow adapter, and a portion of the guide tube is supported by a ridge support fixture. The first clamp and second clamp are then moved towards the guide tube, applying force to the guide tube, simultaneously forming a first crimp and a second crimp.

The invention relates to an air spring having: a rolling bellows (1) with an opening which has a bead (2) reinforced by a core (3) and a rolling piston (4) with a seat (5) for the rolling bellows (1) and a support shoulder (7) for the rolling bellows (1),

wherein when the rolling bellows (1) is in the mounted state, its end assigned to the rolling piston (4) is connected to the rolling piston (4) in an airtight manner by means of a clamping fit between the bead (2) and the seat (5) of the rolling piston (4), and the bead (2) of the rolling bellows (1) rests at least partly on the support shoulder (7), wherein the rolling piston (4) is made of a thermoplastic material. The object of the invention is to improve an air spring of the type outlined above such that the bellows (1) can very reliably and simply be prevented from slipping off the piston (4), in particular in view of the use of plastic as the piston material. This is achieved in that on the seat (5) for the rolling bellows (1), the rolling piston (4) has an axially protruding, substantially cylindrical securing ring (8), which protrudes axially beyond the bead (2) of the rolling bellows (1) after mounting of the rolling bellows (1) on the seat (5), can be plasticized by an at least partial heating process, and in the plasticized state can be deformed radially outwardly over the bead (2) of the rolling bellows (1) by means of a forming die (9, 10, 11) such that the bead (2) is at least partly surrounded by the deformed securing ring (8).

A chassis system for commercial vehicles includes a trailing arm and a plunger piston which are connected or can be connected to one another via a connecting region, the connecting region having an adjusting device which includes an engagement element and a guide element, and it being possible for the engagement element to be moved relative to the guide element in such a way that a displacement, in particular a translational movement, of the plunger piston relative to the trailing arm is made possible.

An air spring assembly includes a piston configured to couple to a suspension component, a top cap configured to couple to a vehicle frame, and a hollow guide tube having a first end coupled to the top cap and a second end provided with an aperture to the hollow. The piston passes through the aperture and is disposed at least partially within the guide tube. The assembly also includes a diaphragm disposed at least partially within the guide tube, disposed between and attached to the piston and the top cap. The assembly further includes a seal member having an outboard portion coupled to the guide tube proximate the second end, an inboard portion coupled to the outer periphery of the piston, and a membrane extending between the outboard portion and the inboard portion. The membrane defines a rolling lobe disposed between the guide tube and the piston.

A spring-damper assembly includes a damper and an adjustable gas spring system coupled to the damper. The spring-damper assembly can be coupled to a vehicle as part of a suspension thereof. The adjustable gas spring system maintains the ride height of the vehicle while absorbing forces from changes in the terrain. The dampers control unwanted movement of the coil spring and dissipate forces from the suspension.

An end member assembly includes first and second end member sections. The first end member section includes a first securement feature integrally formed thereon. The second end member section includes a second securement feature integrally formed therein that is dimensioned to cooperatively engage the first securement feature. In an assembled condition, the first and second end member sections are operatively engaged to substantially inhibit axial displacement therebetween. A substantially fluid-tight joint can be formed between the first and second end member sections such that an end member chamber can be formed within the end member assembly. A third end member section can be included, and can be operatively connected to the second end member section. A gas spring assembly and a suspension system are also included.

An inertia-actuated valve assembly includes a valve housing, a valve body and a biasing element. The valve housing includes a groove that has an open end fluidically accessible from along one side thereof. The valve housing includes a flow channel extending therethrough in fluid communication with the groove from along an opposing side of the valve housing. The valve body is positioned within the groove of the valve housing such that the valve body and the valve housing are axially co-extensive along at least a portion thereof. The biasing element operatively engages the valve body and generates a biasing force urging the valve body in a first axial direction. The biasing force is greater than a predetermined dynamic gas pressure threshold value multiplied by a pressure area and is less than or approximately equal to a valve body mass multiplied by 2.5 times the nominal acceleration due to gravity.