A valve actuator device includes a supporting body, a driving shaft, and a fluid cylinder having a body connected to one side of the supporting body. The cylinder has a rod that controls rotation of a driving arm rigidly connected to the driving shaft. Linear movement of the rod is converted into rotation of the driving arm by engagement of a cam-follower pin carried by the rod within a slot formed in the driving arm. The slot is formed in an insert that constitutes an element separate from the driving arm body and that is received and held within a seat of the driving arm body. Thus, a single main body for the driving arm provided, having a plurality of inserts for selective mounting within the seat and are differentiated from one another in the dimensions and shape of the slot and/or in the material of the insert.

The invention relates to an electromechanical brake booster for a vehicle brake system, comprising an actuating unit that can be coupled to a brake cylinder. The actuating unit comprises at least one actuating element that can be coupled to an electric motor by means of a transmission. The actuating unit also comprises an actuating member that can be coupled to a force input member. The brake booster comprises at least one housing in which at least sections of the actuating unit are received. At least one damping element is arranged between the at least one housing and at least the at least one actuating element.

A piston for a fluid-actuated working cylinder, with a piston base unit which is coaxial to a piston longitudinal axis, consisting of a rigid core body which has radial outer peripheral surface and of an annular filling body which is seated in an annular receiving groove. The receiving groove is coaxial to the piston longitudinal axis and in the region of the radial outer peripheral surface is designed with a radially outwardly facing groove opening in the core body. The piston further includes a ring element which consists of plastic. The ring element radially outwardly coaxially encompasses the piston base unit at least in the region of the filling body, being radially supported with a radial inner peripheral surface on the piston base unit, projecting radially beyond the radial outer peripheral surface of the core body and comprising an axially orientated axial support surface radially outside the piston base unit on its two axial face sides. The piston further includes an annular enveloping body which has rubber elastic characteristics.

A counter including a housing disposed about a tubular creating a space therebetween, a piston disposed in the space and responsive to pressure up events in the tubular to compress a transfer chamber, a supply chamber fluidly attached to the transfer chamber; a trigger chamber fluidly attached to the transfer chamber wherein sequential pressure events cause the piston to move fluid from the supply chamber to the trigger chamber. A counter including a fluid incrementing configuration, an activation member in fluid force communication with the fluid incrementing configuration, the activation member having a first position where a fluid port is blocked and a second position where the fluid port is unblocked, the fluid port being fluid pressure connected to a tool to be actuated when the activation member is in the second position.

A pistonless double-acting cylinder apparatus comprises a piston rod member, a first cylinder member disposed on the piston rod member, a second cylinder member disposed on an end surface of the first cylinder member, a tie rod which connects the first cylinder member and the second cylinder member, nuts provided on both ends of the tie rod, a first sealing ring located between the first cylinder member and the second cylinder member, a first cushion and a second cushion disposed on the piston rod member. The piston rod member comprises a piston rod left section, a first sealing gasket disposed on the piston rod left section, a piston rod middle section disposed on an end surface of the first sealing gasket, a second sealing gasket disposed on an end surface of the piston rod middle section, a piston rod right section disposed on the second sealing gasket.

A rod assembly for a fluid pressure cylinder has a rod member and a packing that is mounted on an outer circumferential part of the rod member and slides along a slide hole. Assembly is simple because a conventional hard piston is not used. The assembly can be carried out simply by hand without the use of a dedicated tool. Thus, the rod assembly simplifies assembly work.

An electrohydraulic system for use under water includes an electrohydraulic actuator and a container having an internal space provided for forming a volume which is enclosed from the environment and which is provided for receiving a hydraulic pressurized fluid. A hydraulic cylinder is provided in the internal space of the container, the inside of which is divided into a first cylinder chamber and a second cylinder chamber by a piston to which a first piston rod and a second piston rod are connected. The two active surfaces of the piston are the same or approximately the same size.

A rod assembly for a fluid pressure cylinder includes a rod member and a packing that is mounted on an outer circumferential part of the rod member and slides along a slide hole. Assembly is simple because a conventional hard piston is not used. The assembly can be carried out simply by hand without the use of a dedicated tool. Thus, the rod assembly simplifies assembly work.

An integrated piston and bearing may include a piston having an outer peripheral surface and a first end and a second end and a bearing arranged on the outer peripheral surface. The bearing may include a surface contour including a setback region with a first thickness and a full region with a second thickness, thicker than the first thickness. The bearing may also include a snubbing chamfer transitioning between the first and second thicknesses.

An actuator including a housing, an actuator rod and a snubber assembly. The actuator has an axis, the housing has a first end and an aperture positioned at the first end of the housing, and the actuator rod extends through the aperture along the axis of the actuator. The snubber assembly is mounted at the first end of the housing, and includes one or more energy absorbing devices. The snubber assembly is positioned on the housing such that an axis of each of the one or more energy absorbing devices is offset relative to the axis of the actuator. The snubber assembly is configured such that the one or more energy absorbing devices provide bidirectional end-of-stroke damping.