A lattice structure and system for absorbing energy, damping vibration, and reducing shock. The lattice structure comprises a plurality of unit cells, each unit cell comprising a plurality of rib elements with at least a portion of the rib elements including a solid bendable hinge portion for converting energy into linear motion along a longitudinal axis of the respective rib element.

A lattice structure and system for absorbing energy, damping vibration, and reducing shock. The lattice structure comprises a plurality of unit cells, each unit cell comprising a plurality of rib elements with at least a portion of the rib elements including a solid bendable hinge portion for converting energy into linear motion along a longitudinal axis of the respective rib element.

Primary plate springs overlap a first plate spring segment of a coupling plate spring in a first direction and respectively have a frictional contact portion which generates sliding friction relative to the first plate spring segment in response to vibrations, Secondary plate springs overlap a second plate spring segment of the coupling plate spring in a second direction and respectively have a frictional contact portion which generates sliding friction relative to the second plate spring segment in response to the vibrations while the second direction is different from the first direction. Tertiary plate springs overlap a third plate spring segment of the coupling plate spring in a third direction and respectively have a frictional contact portion which generates sliding friction relative to the third plate spring segment in response to the vibrations while the third direction is different from the first and second directions.

Primary plate springs overlap a first plate spring segment of a coupling plate spring in a first direction and respectively have a frictional contact portion which generates sliding friction relative to the first plate spring segment in response to vibrations, Secondary plate springs overlap a second plate spring segment of the coupling plate spring in a second direction and respectively have a frictional contact portion which generates sliding friction relative to the second plate spring segment in response to the vibrations while the second direction is different from the first direction. Tertiary plate springs overlap a third plate spring segment of the coupling plate spring in a third direction and respectively have a frictional contact portion which generates sliding friction relative to the third plate spring segment in response to the vibrations while the third direction is different from the first and second directions.

A suspension system (22) configured to minimize transmission of acoustic and vibrational energy in a device, comprising: (i) a rigid support (24); (ii) an operative element (16) positioned within the rigid support and comprising a drive frequency when the device is in operation; and (iii) a resilient element (26) engaging the rigid support and configured to create a resilient force against one or more degrees of freedom of vibrations generated by the operative element; wherein the natural frequency in one or more of the degrees of freedom of the suspension system, in the degrees of freedom of interest, are tuned into a narrow resonant frequency range by the suspension, and wherein the resonant frequency is less than the drive frequency.

A suspension system (22) configured to minimize transmission of acoustic and vibrational energy in a device, comprising: (i) a rigid support (24); (ii) an operative element (16) positioned within the rigid support and comprising a drive frequency when the device is in operation; and (iii) a resilient element (26) engaging the rigid support and configured to create a resilient force against one or more degrees of freedom of vibrations generated by the operative element; wherein the natural frequency in one or more of the degrees of freedom of the suspension system, in the degrees of freedom of interest, are tuned into a narrow resonant frequency range by the suspension, and wherein the resonant frequency is less than the drive frequency.

A damper for an object is placed in a medium subjected to vibrations. The damper has an idle state in the absence of vibrations, a first operating state in case of vibrations of a first type, and a second operating state in case of vibrations of a second type. The level of each vibration of the first type is less than the level of each vibration of the second type. The damper includes an outer support structure, an inner support structure, and at least one pair of membranes formed of a first membrane and a second membrane. Each membrane is formed of a viscoelastic material including fibers aligned substantially in a same direction.

Disclosed is a self-powered vibration damper based on piezoelectricity and a control method. The damper comprises a loading platform, an energy collecting mechanism, a curved leaf spring, a vibration control mechanism and a substrate all connected in sequence, the circuit system comprises a rectifier circuit, a DC-DC voltage conversion circuit, an energy storage circuit, a control circuit and a charging battery, a first piezoelectric stack is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the input end of the DC-DC voltage conversion circuit, the output end of the DC-DC voltage conversion circuit is connected with the input ends of the energy storage circuit and the charging battery, the output end of the energy storage circuit is connected with the input end of the control circuit, the output end of the control circuit is connected with the second piezoelectric stack.

A valve structure includes: a valve unit including a valve body, a shaft portion extending from the valve body, and a separating portion provided on the shaft portion and spaced apart from the valve body; a mounting plate located between the valve body and the separating portion and including an insertion hole into which the shaft portion is inserted; a holding portion including a first holding surface provided on the mounting plate, and a second holding surface provided on the valve unit and spaced apart from the first holding surface; a protrusion provided on one of the valve unit and the mounting plate, an end of the protrusion protruding beyond the first and second holding surfaces; and an elastic body including a contact portion located between the first and second holding surfaces, and a pressed portion located inside or outside the contact portion and contacting the protrusion.

A compressor is provided. The compressor compressing and discharging a refrigerant sucked into a cylinder comprises the cylinder configured to form a compressed space of the refrigerant and having a cylindrical shape; a piston configured to reciprocate axially in the cylinder and having a cylindrical shape; an intake valve disposed at a front of the piston; a fixing member disposed outside the piston; a rod comprising one end disposed at the intake valve and configured to extend axially; a first elastic member connected to the fixing member and other side of the rod; a second elastic member disposed to be spaced apart from a rear of the first elastic member and connected to the fixing member and the other side of the rod; and a first spacer insert-injected with the first elastic member and the second elastic member.