A hydraulic module including a cylinder (2) which accommodates a piston (3) which delimits a chamber (4) which receives the brake fluid. The piston (3) is connected to the electric motor (5) of the module (1) by a recirculating ball screw (6), whose core (61) is fixedly connected to the piston (3) which itself is guided by needles (21) which are parallel to the axis (xx) of the piston (3) and with which notches (351) on the circumference of the piston (3) interact. The piston (3) is a piece, which is formed from a cylindrical body (32) made from anodized aluminum and an outer ring (35) made from steel, which is forcibly mounted on the edge (34) of the piston and is provided with notches (351) with a cross section which corresponds to the effective cross section of the needles (21).

In a piston unit of a fluid pressure cylinder a plurality of magnets are disposed through holes provided in a ring body. The magnets are disposed in facing relation to detection sensors that are mounted on connecting rods, and are provided in the same quantity as the connecting rods. Further, a guide rod extending from a head cover to a rod cover is inserted through the interior of the ring body. When the piston unit is displaced along the cylinder tube, rotational displacement is restricted by the piston unit being displaced along the guide rod, whereby the magnets are retained to face toward the connecting rods at all times. Therefore, the position of the piston unit is detected by the detection sensors through the magnets.

A fluid pressure cylinder is equipped with a piston rod connected coaxially with a piston and which slides linearly in the interior of a body. A cutout recess having a predetermined length along an axial direction of the piston rod is formed on a side surface of the piston rod. A planar bearing is provided, which projects toward the cutout recess from an inner surface of the body, and includes a distal end surface that abuts on the same plane with a bottom surface of the cutout recess.

The present invention relates to a fluidic cylinder. This fluidic cylinder is configured in such a manner that a piston unit is received in an axially displaceable manner within a cylinder tube formed in a rectangular cross-sectional shape. The piston unit has: a base body having the front end of a piston rod staked thereto; a wear ring having the base body received therein and having a magnet incorporated therein; and piston packing adjacent to the wear ring. The piston unit is integrally held at one end of the piston rod. The wear ring and the piston packing are formed in a rectangular cross-sectional shape corresponding to the rectangular cross-sectional shape of the cylinder tube and are provided rotatable relative to the piston rod.

A modular electric bedstead includes an upper body supporting unit having a front base, a back supporting rack pivotally connected with the front base, and a front actuator pivotally connected between the front base and the back supporting rack, a lower body supporting unit having a rear base, a thigh supporting rack pivotally connected with the rear base, a lower leg supporting rack pivotally connected with the thigh supporting rack, and a rear actuator pivotally connected between the rear base and the thigh supporting rack, and a buttock supporting unit having two middle bases and a buttock supporting rack detachably and across disposed on the two middle bases. Each middle base has front and rear ends detachably connected with the front and rear bases, respectively. The bedstead is dismantlable to reduce the space occupied and can be flatly packed for facilitating transportation.

An electric bed package includes a bedstead and a packing member. The bedstead includes an upper body supporting unit, a lower body supporting unit and a buttock supporting unit, which all have a flat shape. The upper and lower body supporting units are parallel stacked in a way that the buttock supporting unit is arranged by a lateral side of a stack of the upper and lower body supporting units and the buttock supporting unit is approximately perpendicular to the upper body supporting unit. The packing member packs and retains the bedstead therein. The electric bed package has a reduced volume, facilitating transportation thereof.

A hydraulic operating device for a hydraulic system fluid of a cycle or of a motorcycle comprising a body, a first chamber carved into the body in fluid communication with a tank, a distribution body for the hydraulic system fluid, a cartridge, a first elastic element and a piston.

A hydraulic operating device for a fluid of a cycle or of a motorcycle hydraulic system including a body, a first chamber carved in the body adapted to house an actuating piston, a second tank-chamber carved in the body and in fluid communication with said first chamber, a floating plug, a sphere, an elastic element, a rear sealing element and a rear plug.

A control device for a hydraulic brake for a bicycle includes a reservoir for hydraulic fluid. The reservoir has a variable volume. The control device also includes a reservoir cover at least partially defining the reservoir, and a support that is attachable to a handlebar of the bicycle via an inner annular surface of the support. A handlebar proximity zone is radially outer relative to the inner annular surface of the support and is within two centimeters of the inner annular surface of the support. At least part of the reservoir cover is within the handlebar proximity zone.

A one-way oil-way driven expansion and retraction movement tool includes a hydraulic driving structure, two long arm rods and two connecting rods, wherein, the hydraulic driving structure has a cylinder barrel, a plunger and a shaft rod, the two arm rods are opposite each other and are opposite the two sides of the shaft rod in the lateral direction. One end of each arm rod is respectively pivoted on the cylinder barrel, and the other end of each arm rod is respectively used for arranging a working piece, so that each working piece can move toward or away from each other to execute corresponding work. The connecting rods are respectively pivoted with each of the arm rods and with the connecting part, so that, through the connecting rods, the shaft rod can pull the arm rods to move away from each other or toward each other.