Systems and methods for reducing vibration in power tool. One system includes a power tool that includes a housing and a motor. The power tool further includes a magnetically susceptible fluid located within the housing. The power tool further includes an inductor configured to introduce a magnetic field to the magnetically susceptible fluid. The power tool further includes a sensor configured to indicate an amount of vibration experienced by the power tool. The power tool further includes an electronic processor coupled to the sensor and to the inductor. The electronic processor is configured to receive an input signal from the sensor indicating the amount of vibration, to generate a control signal based on the input signal, and to provide the control signal to the inductor to control the magnetic field.

A damping system for a hydraulic hammer is disclosed. The hydraulic hammer includes a housing and a mounting bracket disposed on the housing. The damping system includes an expandable bladder positioned between the power cell and the mounting bracket. The expandable bladder is configured to receive a supply of pressurized fluid and store a threshold volume of pressurized fluid therein. The damping system includes a plurality of sensors for detecting one or more parameters related to operating conditions of the hydraulic hammer. The damping system includes a controller disposed in communication with the sensors. The controller is configured to receive one or more inputs indicative of the parameters from the sensors to determine a threshold volume of pressurized fluid to be maintained in the expandable bladder. The controller is configured to supply the threshold volume of pressurized fluid to the expandable bladder during an operation of the hydraulic hammer.

A cushion device is used for a cylinder of a pneumatic tool, and the pneumatic tool contains: a body, a cylinder, a valve unit, a piston member, a cushion washer, and at least one spring. The body includes a grip and a fitting sleeve having a chamber, a closing element, and an opening. The cylinder is fitted in the chamber and includes a room and an abutting portion. The valve unit is mounted between the room and the abutting portion. The piston member is accommodated in the room and slides along a movement axis. The cushion washer and the at least one spring are mounted in the chamber, and the cushion washer abuts against the closing element and the pressing face. The cushion washer includes at least one open segment which has at least one air groove each having a mouth parallel to the movement axis.

A power tool includes a motor, a hammer mechanism, a housing, and a handle. The motor has a motor shaft that rotates around a motor axis. The hammer mechanism includes a cylinder and a hammer element and is configured to convert rotary motion of the motor shaft to linear motion of the hammer element along a prescribed hammer axis by utilizing action of an air spring of an air chamber. The housing has a front end part including a front end surface to which a tool accessory is mounted, and a rear end part including a rear surface on the opposite side to the front end surface The handle is configured to be held by a user. The motor axis and the hammer axis are parallel to each other. The rear end of the handle is arranged on the rear end part.

A hydraulic hammer includes: a cylinder having a first cylinder end and a second cylinder end opposite the first cylinder end; a piston disposed within the cylinder, the piston having a first piston end, the piston being reciprocatingly movable with respect to the cylinder along an axial direction; a valve body disposed on the first cylinder end so as to define a valve body cavity; and a seal carrier sealingly arranged between the first piston end and the first cylinder end and being reciprocatingly movable with respect to the cylinder along the axial direction. The piston is reciprocatingly movable with respect to the seal carrier along the axial direction.