A dampened electronic control for manual operation to control a machine includes a housing, a movable element pivotally supported in the housing upon a shaft with a rotation axis, and an electronic sensor configured to detect rotational movement of the shaft. A non-hydraulic damping mechanism is coupled to the moveable element, wherein the damping mechanism includes a piston disposed in a cylinder of the housing and configured to operate with air inside the cylinder as the working fluid and a spring to resiliently bias the piston towards the moveable element. Movement of the moveable element towards the piston causes the piston to compress the air inside the cylinder to thereby provide a resistance force against the moveable element to thereby dampen the movement of the moveable element.

A cushion device for a foldable chair includes a buffer member and a tension spring. The buffer member includes a sleeve portion for sleeving over a side part of a rear leg, a buffer portion provided on the sleeve portion and an embedded portion provided along a side of the sleeve portion and embedded inside a side channel of the rear leg and secured thereat via a fixing element. The tension spring includes a spring body having a first hooking portion fixed a pivot plate of a seat and a second hooking portion including a second extension section, a second bent section engaging a limiting plate of a front leg and a third extension section extending from the second bent section in such a manner to prevent disengagement of the second bent section of the tension spring from a hooking hole in the limiting plate.

A tail skid shock absorber including an outer shock absorber canister, a crushable indicator cartridge disposed within the outer shock absorber canister, and an indicator rod coupled to the crushable indicator cartridge so as to move with a portion of the crushable indicator cartridge as a unit.

The vertical vibration isolation system of the present invention includes a bearing base, a guide rail assembly and a plurality of buckling elements. The bearing base has an upper platform that can move along a vertical direction. The guide rail assembly surrounds the bearing base and has a plurality of arc-shaped sliding channels. The top portion of each buckling element can move with the upper platform, while the bottom portion of each buckling element is slidably connected to the corresponding arc-shaped sliding channel. The vertical displacement of the upper platform would cause different degrees of buckling of the buckling elements and also induces sliding motion of the bottom portion of the buckling elements along the arc-shaped sliding channels. Accordingly, the vertical vibration isolation system can provide nonlinear restoring force by buckling and sliding mechanisms so as to exhibit vertical vibration isolation effect.

End mount assemblies include a mounting bracket dimensioned for securement to an end member of a gas spring and damper assembly. The end mount assembly can include an inner mounting element dimensioned for securement to an elongated damping rod of the gas spring and damper assembly. A first plurality of bushing elements can be operatively disposed between the inner mounting element and the mounting bracket. A second plurality of bushing elements can be operatively disposed between the inner mounting element and the end member. Gas spring and a damper assemblies including such an end mount assembly as well as suspension systems and methods of assembly are also included.

A noise vibration harshness reduction assembly includes a housing, a component, and an axial ring. The component is supported via the housing and movable relative to the housing. The axial ring is disposed axially along the component. The axial ring is configured to attenuate axial sound inducing vibrations in response to operation of the component.

A suspension system for a vehicle and method for operating the same includes a shock absorber housing having a longitudinal axis, a spring disposed around the shock absorber housing and a retainer collar disposed around the shock absorber housing. An actuator coupled to the retainer housing moves at least a portion of the retainer housing to move the spring in a direction corresponding the longitudinal axis.

Methods and apparatus are provided for a shock attenuation device configured to operate between a structure and a mass that is supported by and moveable relative to the structure in a guided manner along a stroking direction. In one embodiment, a notch load portion is configured to provide a resisting force to relative displacement of the supported mass over a first stage stroking distance according to a predefined load profile that includes a spike load peaking at a first threshold load value at the onset of relative displacement, and a substantially constant notch load for a remainder of the first stage stroking distance. A constant load portion arranged serially with the notch load portion is configured to provide a substantially constant resisting force to displacement of the supported mass at a second threshold load value over a second stage stroking distance, wherein the second threshold load value is higher than the first threshold load value.

A vibration damper including a frame having at least a first cavity, a frame first end and a frame second end spaced from the frame first end; a shaft slidably coupled to and extending into the frame where the shaft extends through the first cavity; a first vibration isolator disposed within the first cavity where the shaft extends through the first vibration isolator so as to capture the first vibration isolator within the first cavity where the first vibration isolator interfaces with the frame second end; and a second vibration isolator disposed on the shaft, where the shaft extends through the second vibration isolator so as to capture the second vibration isolator on the shaft where the second vibration isolator interfaces with the frame second end opposite the first vibration isolator, where the first vibration isolator and the second vibration isolator act only in compression.

The vertical vibration isolation system of the present invention includes a bearing base, a guide rail assembly and a plurality of buckling elements. The bearing base has an upper platform that can move along a vertical direction. The guide rail assembly surrounds the bearing base and has a plurality of arc-shaped sliding channels. The top portion of each buckling element can move with the upper platform, while the bottom portion of each buckling element is slidably connected to the corresponding arc-shaped sliding channel. The vertical displacement of the upper platform would cause different degrees of buckling of the buckling elements and also induces sliding motion of the bottom portion of the buckling elements along the arc-shaped sliding channels. Accordingly, the vertical vibration isolation system can provide nonlinear restoring force by buckling and sliding mechanisms so as to exhibit vertical vibration isolation effect.