For rotary protection of an external force piston of a power brake pressure generator of a hydraulic vehicle power braking system, axially parallel rotary protection grooves are provided at a circumference of an external force cylinder bore in a hydraulic block of a hydraulic unit of the vehicle power braking system, and tabs of the external force piston protrude into the rotary protection grooves.

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.

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 transmission includes a case, a clutch pack, a piston. The case defines a bore that transitions along a step from a first to a second diameter. The piston is disposed within the bore. The piston has first and second seals that engage the case along the first and second diameters, respectively. The piston defines a chamber that is encompassed by the piston, the case, the first seal, and the second seal. The piston is configured to engage a clutch pack when hydraulic fluid is channeled into the chamber.

For rotary protection of an external force piston of a power brake pressure generator of a hydraulic vehicle power braking system, axially parallel rotary protection grooves are provided at a circumference of an external force cylinder bore in a hydraulic block of a hydraulic unit of the vehicle power braking system, and tabs of the external force piston protrude into the rotary protection grooves.

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.

In a hydrostatic pressure cylinder, a holding member which holds a magnet is mounted on a piston unit to rotate together with a cylinder tube. The cylinder tube is capable of rotating with respect to a rod cover and a head cover. It is thereby possible to change an attachment position of a magnetic sensor by rotating the cylinder tube.

A differential pressure motor comprising two working pistons and a rod that move in a hollow space. Walls defining the hollow space have five openings. A valve piston moves between and against the working pistons and can be driven by the working pistons. The valve piston with the five openings forms a valve with which an alternate impact of a first pressure and a second pressure on the working pistons is controllable when the pressures are applied to three of the five openings such that the working pistons periodically move which drives a periodic movement of the valve piston. Also disclosed are a surgical drive system with, a medical lavage system for the debridement of soft tissue and/or bone tissue having, and a medical device for brushing, rasping or sawing soft tissue and/or bone tissue with such a differential pressure motor, and a method for operating a differential pressure motor.

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 levelling system for a vehicle, in particular a rail vehicle, includes at least one levelling cylinder and a levelling piston. The levelling piston is at least partially provided in the levelling cylinder in a movable manner for setting the level of the rail vehicle. Further, the levelling system includes at least one guiding element, which is arranged within the levelling piston and partially protrudes from the levelling piston into at least one recess of the levelling cylinder such that an end stop in a longitudinal direction is provided for the relative movement between the levelling piston and the levelling cylinder.