A system includes a first structure, wherein the first structure lacks space inversion symmetry, and wherein the first structure includes a first elastic lattice. The system further includes a second structure, wherein the second structure lacks space inversion symmetry, and wherein the second structure includes a second elastic lattice. Additionally, the system includes the first structure coupled to the second structure such that the first structure and the second structure have a mirror symmetry to each other.

A hydraulic vibration generation device or hydraulic motor is provided. The device includes a manifold having an inner volume with a pressure chamber extending into the inner volume, a fluid inlet orifice and a fluid outlet orifice. The device further includes a vibration generating member having a grooved drive and an off-center weight and retaining plates. The inner volume receives the vibration generating member within the inner volume. The vibration generating member rotates and generates vibration in response to hydraulic fluid flowing into the manifold through the inlet orifice and directed through the pressure chamber, relieves pressure upon exiting the pressure chamber and out of the manifold through the outlet orifice. Also provided a hydraulic motor with a same manifold and pressure chamber, but with a power generating member having the same groove drive without and off-center weight. Rotation of the power generating member generates power.

Disclosed are a control method for a road roller machine, and a road roller machine. The control method includes: turning up, in response to a request of starting vibration, a revolving speed of an engine until the revolving speed exceeds a preset revolving speed range and turning down a displacement of a driving pump; starting a vibration pump; judging whether a vibration assembly has completed a vibration start; turning down, after the vibration start is completed, the revolving speed of the engine to be within the preset revolving speed range, turning up the displacement of the driving pump, and turning up a displacement of the vibration pump. The road roller machine includes a main body, an engine, a driving assembly, a driving pump, a vibration pump, a vibration assembly and a controller.

Disclosed are a control method for a road roller machine, and a road roller machine. The control method includes: turning up, in response to a request of starting vibration, a revolving speed of an engine until the revolving speed exceeds a preset revolving speed range and turning down a displacement of a driving pump; starting a vibration pump; judging whether a vibration assembly has completed a vibration start; turning down, after the vibration start is completed, the revolving speed of the engine to be within the preset revolving speed range, turning up the displacement of the driving pump, and turning up a displacement of the vibration pump. The road roller machine includes a main body, an engine, a driving assembly, a driving pump, a vibration pump, a vibration assembly and a controller.

A vibratory compactor is provided. The vibratory compactor may include a compactor plate, a frame coupled to the compactor plate, wherein the frame may include an inner space and a housing. The frame may include a plurality of mounting brackets coupled between a first side member and a second side member of the frame. The vibratory compactor may include a vibration generation device coupled to the compactor plate within the inner space of the frame. The vibratory compactor may include a plurality of isolators, each isolator coupled to one mounting bracket of the plurality of mounting brackets. The housing may be coupled to the plurality of isolators, wherein the housing may include couplers removably coupled to a top surface of the housing. The couplers may be configured for coupling the vibratory compactor to an excavator type vehicle.

A vibratory compactor is provided. The vibratory compactor may include at least one load bearing member coupled to a load bearing base and a frame coupled to a compactor plate with the load bearing base coupled to the frame. The frame and compactor plate are configured to vibrate. The vibratory compactor may also include a housing having an inner volume, the housing coupled to the frame by at least one isolator with the frame and the at least one load bearing member located within the inner volume. The housing may be coupled to an arm of an excavator. In response to force being applied to the housing by the excavator during compaction, the housing moves with respect to the frame until a top member of the housing contacts the at least one load bearing member and compacts soil more effectively than a vibratory compactor without the load bearing member.

A vibratory compactor is provided. The vibratory compactor may include a compactor plate, a frame coupled to the compactor plate, wherein the frame may include an inner space and a housing. The frame may include a plurality of mounting brackets coupled between a first side member and a second side member of the frame. The vibratory compactor may include a vibration generation device coupled to the compactor plate within the inner space of the frame. The vibratory compactor may include a plurality of isolators, each isolator coupled to one mounting bracket of the plurality of mounting brackets. The housing may be coupled to the plurality of isolators, wherein the housing may include couplers removably coupled to a top surface of the housing. The couplers may be configured for coupling the vibratory compactor to an excavator type vehicle.

A vacuum suction cup assembly, including a vacuum cup, a vibration assembly, and a vibration shock absorber. The vacuum cup includes a skirt and is configured to be pressurized when placed against a surface to retain the vacuum cup against the surface in any orientation. The vibration assembly includes a vibrator; a vibration transfer plate on which the vibrator is mounted; and at least one vibration transfer blocks disposed on an opposite face of the vibration transfer plate from the vibrator, wherein the at least one vibration transfer blocks is configured and arranged to transmit a majority of the vibration forces from the vibrator to the surface. The vibration shock absorber is disposed between the vibration assembly and the vacuum cup.

A vacuum suction cup assembly, including a vacuum cup, a vibration assembly, and a vibration shock absorber. The vacuum cup includes a skirt and is configured to be pressurized when placed against a surface to retain the vacuum cup against the surface in any orientation. The vibration assembly includes a vibrator; a vibration transfer plate on which the vibrator is mounted; and at least one vibration transfer blocks disposed on an opposite face of the vibration transfer plate from the vibrator, wherein the at least one vibration transfer blocks is configured and arranged to transmit a majority of the vibration forces from the vibrator to the surface. The vibration shock absorber is disposed between the vibration assembly and the vacuum cup.

A fluidic device may include inlet ports, control input ports, one or more output channels, inlet channels that are each configured to convey fluid from one of the inlet ports to one of the one or more output channels, and pistons. In some examples, each piston may include (1) a restricting gate transmission element configured to inhibit, when the piston is in a first position, and uninhibit, when the piston is in a second position, one of the inlet channels, (2) a control gate configured to interface with a first control pressure that, when applied to the control gate, forces the piston towards the first position, and (3) an additional control gate configured to interface with a second control pressure that, when applied to the additional control gate, forces the piston towards the second position. Various other related devices, systems, and methods are also disclosed.