A vibrator-system for sinking an object into the ground by means of vibration, comprises a suspension yoke, a carter or carters mounted to the suspension yoke and equipped with a rotatable eccentric weight or weights for the generation of the vibration, and clamping means connected at a side of the carter or carters that is opposite to the suspension yoke for clamping the object, wherein the vibrator system is convertible between a first configuration and a second configuration, wherein in the first configuration a single carter is mounted to the suspension yoke and the clamping means are mounted to the single carter, and that in the second configuration two carters, each equipped with a rotatable eccentric weight or weights, are mounted between the suspension yoke and the clamping means.

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.

A resonant source element configured to generate seismic waves. The resonant source element includes a housing; a high-pressure system configured to be discharged inside the housing; and a first conduit attached to an opening of the housing, wherein a distal end of the first conduit freely communicates with an ambient.

The invention relates to a device and a method for generating percussive pulses or vibrations for a construction machine, with a housing, a piston which is reversibly reciprocable in a working space in the housing between a first reversal point and a second reversal point, a pressure fluid supply, through which pressure fluid can in each case be led into and out of the working space in the region of the first reversal point and the second reversal point, wherein the piston can be set into the reversible movement in order to generate the percussive pulses or vibrations, at least one controllable valve, through which the pressure fluid can be led into and/or out of the working space, and a control unit which is connected to the at least one controllable valve, wherein by the control unit the movement of the piston in the working space can be controlled and changed. According to the invention provision is made in that the control unit is designed to move the piston at a frequency that corresponds to a resonance frequency of an overall arrangement comprising the piston and the pressure fluid.

The invention relates to a device and a method for generating percussive pulses or vibrations for a construction machine, with a housing, a piston which is reversibly reciprocable in a working space in the housing between a first reversal point and a second reversal point, a pressure fluid supply, through which pressure fluid can in each case be led into and out of the working space in the region of the first reversal point and the second reversal point, wherein the piston can be set into the reversible movement in order to generate the percussive pulses or vibrations, at least one controllable valve, through which the pressure fluid can be led into and/or out of the working space, and a control unit which is connected to the at least one controllable valve, wherein by the control unit the movement of the piston in the working space can be controlled and changed. According to the invention provision is made in that the control unit is designed to move the piston at a frequency that corresponds to a resonance frequency of an overall arrangement comprising the piston and the pressure fluid.

A pneumatic vibration device with a rotatable piston shaft comprises a piston body and a gas diverter. The piston body comprises a piston shaft, an input shaft and a piston cylinder body. The piston shaft comprises a hollow spindle with two ends connected to a first piston and a second piston through connection bearings respectively. The first piston and the second piston are connected through an inner sleeve. The spindle is connected to a rotary connection member. The input shaft stretches into the inner sleeve and is matched and connected with the rotary connection member. The gas diverter comprises a first gas diversion port and a second diversion port. The pneumatic vibration device is compact in structure and high in adaptability, and can realize rotation and vibration of drilling tools.

A vibration exciter with load compensation for the dynamic excitation of test specimens includes a base, an actuator, an armature which can be moved by the actuator in an excitation direction relative to the base and guided by a linear guiding element parallel to the excitation direction, and a pneumatic load compensator which compensates for the gravity force of at least the armature and the test specimen being excited. A high-quality low-perturbation exciter signal is generated by minimizing friction and other nonlinearities occurring during the load compensation. The linear guiding element of the vibration exciter with load compensation includes an air bearing, and the load compensator includes the linear guiding element.

A vibration exciter with load compensation for the dynamic excitation of test specimens includes a base, an actuator, an armature which can be moved by the actuator in an excitation direction relative to the base and guided by a linear guiding element parallel to the excitation direction, and a pneumatic load compensator which compensates for the gravity force of at least the armature and the test specimen being excited. A high-quality low-perturbation exciter signal is generated by minimizing friction and other nonlinearities occurring during the load compensation. The linear guiding element of the vibration exciter with load compensation includes an air bearing, and the load compensator includes the linear guiding element.

A multi-input, multi-output phononic system including a first interface surface and a second interface surface that respond to at least one of a pressure gradient or a velocity gradient in a wave of a turbulent fluid flow or a laminar fluid flow, the pressure gradient or the velocity gradient associated with complex motion of the flow exhibiting a plurality of frequencies exerted on one or more of the interface surfaces; and a subsurface feature extending from the interface surfaces, the subsurface feature comprising a phononic crystal or locally resonant metamaterial adapted to receive one or more of the pressure gradient or the velocity gradient from the fluid flow via the interface surfaces and to alter one or more of a phase and an amplitude of a plurality of frequency components of the fluid flow.

A vibratory compactor is provided. The vibratory compactor may include a frame coupled to a compactor plate. The frame and compactor plate are configured to vibrate to compact soil. 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. A gap may be formed between the housing and the frame, wherein the gap between the housing and the frame inhibits movement of the housing with respect to the frame through the housing contacting the frame when excess forces are applied to the housing in an up/down direction, a forward/backward direction, a side-to-side direction, or combinations thereof.