The invention provides a vibration isolation system (IS), comprising a piston (402) to carry a payload, a connecting member (410), a spring (404) and a flexible member (408). The spring is arranged to support the piston along a direction with a positive stiffness. The flexible member is arranged to apply a force to the piston along the direction via the connecting member with a negative stiffness.

A damper includes a cylinder, a rod including a first engaging portion at a tip end thereof, and a piston formed of an elastic resin material. The piston includes a convex portion provided so as to protrude at a base end portion located on a rod base end side and always in pressure contact with an inner circumference of the cylinder. During damper braking, the first engaging portion of the rod abuts against the other end portion of the piston, and an axial compression force acts on the piston between the first engaging portion and the convex portion in pressure contact with the inner circumference of the cylinder.

A positioning mechanism for lowering a suction manifold from an operational position with respect to pump fluid end to a transit and service position includes a linkage base plate configured to be fixedly coupled with a vehicle trailer, a linkage arm pivotally coupled with the linkage base plate and the suction manifold, a primary damper pivotally coupled with the linkage base plate and the linkage arm, a secondary damper pivotally coupled with the linkage base plate and the suction manifold, and a mechanical stop removably coupled with the secondary damper and configured to maintain the secondary damper at a fixed length while the mechanical stop is coupled with the secondary damper. The positioning mechanism permits the suction manifold to fall under the force of gravity when the suction manifold is detached from the pump fluid end, the primary damper is configured to slow the fall of the suction manifold under the force of gravity, and removal of the mechanical stop from the secondary damper permits the secondary damper to shorten from the fixed length to a shorter length under the force of gravity.

A switching valve for an air spring arrangement of a motor vehicle, which switching valve has a valve housing arrangement which, in the installed state, is arranged between a first air volume and a second air volume. A valve closing member arrangement is actuatable by an actuator is provided such that the valve closing member arrangement, in a first position, fluidically connects the first air volume to the second air volume and, in a second position, fluidically separates the first air volume from the second air volume. The valve closing member arrangement is designed as a rotary slide arrangement. A rotary slide member with first openings is provided between two valve closing bodies, wherein, in the first position, the first openings correspond with second openings of the valve closing body such that a fluidic connection can be produced between the first and the second air volume.

A mowing sickle drive system comprises a knife bar supported by a frame and drive apparatus operable to drive the knife bar in a reciprocating linear motion at a variable drive frequency. A spring is coupled to the knife bar for applying a restoring force to the knife bar toward a neutral position when in motion. The spring has a variable modulus of elasticity that is controlled dependent upon the drive frequency.

A fluid-sealed engine mount may include an insulator integrally formed on an external side of a mount core configured to be coupled to an engine and having a chamber with which fluid for insulation of vibration is sealed; an orifice module mounted below the mount core to divide the chamber into two chambers and having a fluid passage for flow of the fluid; an air chamber provided at a center portion of the orifice module and filled with air; and an elastic membrane mounted above the air chamber at the center portion of the orifice module to seal the air chamber airtightly.

An air spring unit for a chassis of a motor vehicle, includes an air spring cover and an air spring piston, wherein an airtightly secured rolling bellows made of elastomer material partially delimits a working chamber between the air spring cover and the air spring piston, which working chamber can be filled with compressed air, wherein the rolling bellows is surrounded by a divided, sleeve-shaped outer guide having a first outer guide part and a second outer guide part.

The present disclosure provides a tube catcher for a hot forming machine comprising a foot for mounting the tube catcher in the hot forming machine, an upper contact surface for catching a glass tube as it falls into the hot forming machine, and a damping element, which is arranged below the upper contact surface in such a way that it allows the upper contact surface to elastically recede in the direction of the falling direction of the glass tube. This minimizes damage to glass tubes on impact and permits a high production speed. For this purpose, the damping element includes a compressible chamber that can be filled with a gas.

A telescopic arrangement (10) having a hollow cylinder (12) and a part (14) which is telescopically engaged with the cylinder. The arrangement is provided with at least one coil (22) constituting a first form of pulse-induction device, and at least one target (28) constituting a second form of pulse-induction device, to monitor the position of the said part (14) relative to the cylinder (12). A plurality of devices (22) each of one of the said first and second forms of device are positioned on the outside of the cylinder (12), at different respective positions therealong. At least one (28) of the other of the said first and second forms of device is fixed relative to the said part (14) of the arrangement (10) in a position such that it is moved over the said plurality of devices (22) in succession as the said part (14) is telescopically moved relative to the cylinder (12) of the arrangement (10).

A damper assembly comprises a housing disposed on a center axis and defining a fluid chamber for containing a working fluid. A piston is slidably disposed in the fluid chamber dividing the fluid chamber into a compression chamber and a rebound chamber. A piston rod attaches to the piston for moving the piston in the housing. The piston includes a first portion and a second portion defining a first perforation. An outer sleeve has an exterior surface and an interior surface and extends between the first portion and the second portion covering the first perforation. The piston includes a first entry valve and a second entry valve located in the piston and coupled to the piston for limiting the working fluid from flowing into the piston with the first entry valve being disposed adjacent the first portion and the second entry valve being disposed adjacent the second portion.