A display apparatus includes a base, a stand, a head having a display and pivotable between a landscape mode and a portrait mode, a penetration groove, an inner bracket disposed inside the head and having a slit formed therein to face the penetration groove, a shaft including a first extension connected to the stand and extending to an inside of the head through the penetration groove and a second extension extending from an end of the first extension to pass through the slit, a long hole formed in the second extension and extending in a longitudinal direction of the second extension, a guide pin fixed to an inside of the head to pass through the long hole, a slider sliding along the second extension, and a spring disposed on an outer circumference of the second extension and configured to pressurize the slider to maintain contact between the slider and the inner bracket.

A dynamic balance type vertical vibration isolator includes slide blocks, balance springs, mass blocks, a fixed block, rotation shafts, stiffness-adjustable springs, etc. When an earthquake force is upward, the stiffness-adjustable springs are compressed, upward forces of the stiffness-adjustable springs are increased, meanwhile, the slide blocks and the mass blocks move away from the fixed block, the balance springs are stretched to generate pull forces, and the pull forces have vertically upward components, so as to reduce compression degrees of the stiffness-adjustable springs, and further to reduce the upward forces of the stiffness-adjustable springs. Similarly, when the earthquake force is downward, the stiffness-adjustable springs are stretched, downward forces of the stiffness-adjustable springs are increased, meanwhile, the slide blocks and the mass blocks move close to the fixed block, the balance springs are compressed to generate compression forces, and the compression forces have vertical downward components.

A display apparatus includes a base, a stand, a head having a display and pivotable between a landscape mode and a portrait mode, a penetration groove, an inner bracket disposed inside the head and having a slit formed therein to face the penetration groove, a shaft including a first extension connected to the stand and extending to an inside of the head through the penetration groove and a second extension extending from an end of the first extension to pass through the slit, a long hole formed in the second extension and extending in a longitudinal direction of the second extension, a guide pin fixed to an inside of the head to pass through the long hole, a slider sliding along the second extension, and a spring disposed on an outer circumference of the second extension and configured to pressurize the slider to maintain contact between the slider and the inner bracket.

A damping system for a truck assembly of a rail vehicle includes a first friction shoe configured to engage a first portion of a side frame of the truck assembly, and a first lever pivotally coupled to the first friction shoe.

Flexural pivot structures and methods are provided. A flexural pivot as disclosed allows for rotation of a pivoted member relative to a base member about a central axis, while inhibiting or preventing movement of the pivoted member relative to the base member in any other direction. Base and pivoted sections of the flexural pivot structure are connected to one another by a set of resilient blades or flexural members. A thickness of the blades varies with the distance from the central axis. The components of the flexural pivot can comprise a monolithic structure that is formed from a single piece of material.

A damping system for a truck assembly of a rail vehicle includes a first friction shoe configured to engage a first portion of a side frame of the truck assembly, and a first lever pivotally coupled to the first friction shoe.

A damper device (100), for damping the movement of a component, has a device housing (110) and a spring (120) which is fastened by a first end (121) to the device housing (110) and by a second end (122) to a driver element (140). The spring, in a tensioned state, pretensions the driver element (140) in terms of rotation. The driver element (140) is designed such that, during a rotational movement about an axis of rotation, it carries along a pivoting element (150) and, in the process, sets the latter into a rotational movement about the axis of rotation relative to the device housing. The pivoting element is connected to a damper (130). The damper device has a stop element (111) which is designed such that it restricts or limits the rotational movement of the driver element without restricting or limiting the rotational movement of the pivoting element.

Flexural pivot structures and methods are provided. A flexural pivot as disclosed allows for rotation of a pivoted member relative to a base member about a central axis, while inhibiting or preventing movement of the pivoted member relative to the base member in any other direction. Base and pivoted sections of the flexural pivot structure are connected to one another by a set of resilient blades or flexural members. A thickness of the blades varies with the distance from the central axis. The components of the flexural pivot can comprise a monolithic structure that is formed from a single piece of material.

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.

A rotatable bushing for use in automotive suspension, steering, and other suitable joints is provided. The rotatable bushing includes a housing, an elastomeric portion engaging the outer surface of the housing, and a sleeve positioned within the housing. The sleeve is configured to rotate with respect to the housing and generally includes a central bore for receiving a rod or fastener therethrough. The elastomeric portion is configured to deform such that the sleeve is moveable in at least one of an axial direction and a radial direction with respect to an outer surface of the elastomeric portion.