An energy absorber having a bar movable along a longitudinal axis by a tensile force. First and second energy absorbers extend along the longitudinal axis. A coupling mechanism couples the second energy absorber to the bar. The first energy absorber activates upon movement of the bar along the longitudinal axis. The coupling mechanism has a force transferring element to transfer force from the bar to the second energy absorber upon activation by a trigger. The trigger is subjected to a trigger load that is proportional to the bar's velocity along the longitudinal axis. The trigger is displaceable from its unloaded position upon loading and, simultaneously, constrained from displacing by a constraining force acting in opposite direction of the trigger load. The trigger displaces to activate the force transferring element to activate the second energy absorber when the velocity of the bar is above first pre-determined non-zero amount.

A vibration damper (11) including a movable section ((20) to move in at least one direction; a support section to movably support the movable section; a vibration detector (29) to detect a vibration received by the vibration damper; and a computing processor (30) to compute an amount of displacement of the movable section (20) in a first direction, which is associated with the vibration, based on a detection result of the vibration detector (29) to obtain an amount of correction corresponding to the amount of displacement. The support section moving the movable section (20) in a second direction opposite to the first direction based on the amount of correction obtained by the computing processor (30).

Vibratory screens and apparatus therefore are disclosed. In some embodiments, a damper is incorporated having a pin and pivot arm which cooperate to dampen high-amplitude vibratory motion of the screen. In some embodiments, a bumper is disposed transversely adjacent to a sidewall of the screen and mounted to a bracket supporting a damper. In some embodiments, one or more guards protect openings in a pivot arm of the damper.

Vibratory screens and apparatus therefore are disclosed. In some embodiments, a damper is incorporated having a pin and pivot arm which cooperate to dampen high-amplitude vibratory motion of the screen. In some embodiments, a bumper is disposed transversely adjacent to a sidewall of the screen and mounted to a bracket supporting a damper. In some embodiments, one or more guards protect openings in a pivot arm of the damper.

A drive shaft damper may be inserted into a hollow automotive drive shaft. The damper includes both foam and a non-foamed retaining member positioned on its outer surface. The foam, which extends above the damper's outer surface, typically possesses a maximum operating temperature of 175 C. or higher.

A method and system for increasing damping capacity utilizing dry friction between individual wires of a rope embedded in a component formed from a composite is illustrated. The individual wires allow inter-wire friction to occur during part vibration. The component includes a body that is a molded matrix formed form a composite material. The body may be of any material selected from the group consisting of a polymer, a metal or a ceramic material. One or more vibration-damping ropes are embedded in the body. The vibration-damping ropes may be elongated segments or may be a rope having connected ends that form one or more rings. Each vibration-damping rope includes an outer layer of wires that surrounds a plurality of inner wires. Inflowing composite material is prevented from passing by the outer layer of wires and into the inner wires during the manufacturing process, thereby forming voids between the inner wires.

A method and system for increasing damping capacity utilizing dry friction between individual wires of a rope embedded in a component formed from a composite is illustrated. The individual wires allow inter-wire friction to occur during part vibration. The component includes a body that is a molded matrix formed form a composite material. The body may be of any material selected from the group consisting of a polymer, a metal or a ceramic material. One or more vibration-damping ropes are embedded in the body. The vibration-damping ropes may be elongated segments or may be a rope having connected ends that form one or more rings. Each vibration-damping rope includes an outer layer of wires that surrounds a plurality of inner wires. Inflowing composite material is prevented from passing by the outer layer of wires and into the inner wires during the manufacturing process, thereby forming voids between the inner wires.

A buffer device for small-sized roller shade comprises a housing body, a covered cylinder within the housing body, an oil seal over the outer edge of the covered cylinder and sealing with respect to the housing body, a covering body secured onto the housing body, a spring surrounding the outer edge of the covered cylinder away from the housing body and the covering body, a rotating body accommodating the covered cylinder around which the spring is provided, such that the spring and the covered cylinder are combined to rotate, a closure cap connected over the outer edge of the covered cylinder and synchronously rotated therewith, and a securing part away from the housing body while combined with the closure cap and the covered cylinder. Thus, the buffer device is reduced in volume for providing a shade panel with buffer effect in drawing/furling process.

A buffer device for small-sized roller shade comprises a housing body, a covered cylinder within the housing body, an oil seal over the outer edge of the covered cylinder and sealing with respect to the housing body, a covering body secured onto the housing body, a spring surrounding the outer edge of the covered cylinder away from the housing body and the covering body, a rotating body accommodating the covered cylinder around which the spring is provided, such that the spring and the covered cylinder are combined to rotate, a closure cap connected over the outer edge of the covered cylinder and synchronously rotated therewith, and a securing part away from the housing body while combined with the closure cap and the covered cylinder. Thus, the buffer device is reduced in volume for providing a shade panel with buffer effect in drawing/furling process.

A friction damping cast component and method of production are disclosed. The components may be rotary, such as a cast brake rotor, or may be non-rotary, such as a cast suspension part or a cast engine block. Regardless of the type of component, a two-part vibration-damping insert having a thin metal core and a thin metal sheath is provided. The sheath fully encompasses the core in such a way that a dry sliding friction contact develops at their interfaces. The outer surface of the sheath with the metal core inside is rigidly bonded to the cast material that surrounds it during the casting process. The sheath surfaces may have a number of openings that allow a limited infiltration of molten cast iron material just inside the immediate vicinity of the sheath openings for spot rigid bonding between the surrounding cast material and the insert surfaces during casting.