Abstract: A method for producing a fluid line (2) and a corresponding fluid line (2) are specified, wherein a number of tubes are wound in parallel along a helical line in each case, a connecting element (6, 7) is fastened to at least one end and the tubes are embedded in a plastic material. It is wished to make production simple. For this purpose, it is envisaged to use a liquid silicone rubber (12) as the plastic material.

Abstract: The invention relates to a hydraulic pump or motor having inlet and outlet ports and expansible chamber section at one end thereof, which may be a gerator gear set, and a drive shaft at the other end thereof. A distributor valve driven by the drive shaft and having a central bore directs fluid between the inlet and outlet ports in the housing and the expansible chamber section. A shaft, such as a cardan shaft, disposed in the central bore of the valve provides a driving connection between the valve and the expansible chamber forming section. Although a bearing is provided in the housing for the drive shaft, the distributor valve is also subjected to radial loads because the cylindrical surface thereof has a close fitting sealing relationship with the housing bore in which it is rotatably disposed. Lubrication for both ends of the cylindrical surface of the valve is provided by passages extending from valve passages which carry the motive fluid controlled by the valve.

Abstract: The invention relates to a hydraulic pump or motor having expansible chamber section at one end thereof, which may be a gerator gear set, and a drive shaft at the other end thereof. A distributor valve having a central bore directs fluid between inlet and outlet ports in the housing and the expansible chamber section. The leakage of pressurized fluid into the central bore of the valve causes certain problems including the problem of directly or indirectly causing destructive forces to be applied to the seal provided between the drive shaft and the housing. This problem is addressed by providing check valve arrangements in the housing between the central bore of the valve and the inlet and outlet ports. The check valves open in the direction of the inlet and outlet ports so that when fluid pressure in the valve bore exceeds the fluid pressure in either of the ports, the pressure in the bore is lowered by fluid being forced outwardly through the port having the lower pressure.

Abstract: The invention relates to a fluid pressure operated motor or pump of the type having a gerotor displacement mechanism which normally includes inner and outer wheel and ring gears which in operation have relative rotational and orbital movement therebetween. Such devices inherently have a form of valving wherein, with a commutating type of action, fluid is directed from the casing inlet to expanding chambers of the gerotor and directed from collapsing gerotor chambers to the casing outlet. In the unit herein the commutator valving includes two valve plates attached to opposite sides of the orbiting and rotating wheel gear which have the commutating action with the surrounding stationary ring gear.

Abstract: The invention relates to a hydraulic planetary piston type machine and particularly to the rotary slide valve thereof. This type of machine has a rotary piston gear having rotational and orbital movement and a cardan type shaft connects the slide valve to the piston gear. The valve has inlet and outlet, annularly shaped, axially spaced distributor grooves in axially spaced relation. Alternately arranged inlet and outlet stub grooves extend axially from the distributor grooves into axially overlapping relation. The stub grooves in the valve have a commuting action with circumferentially arranged ports in the casing to provide for feeding and exhausting pressurized fluid to and from expanding and contracting chambers formed by the piston gear. In smaller machines the correspondingly smaller flow passages present sufficient flow resistance to substantially affect the efficiency of the machine.

Abstract: The invention relates to a gerotor type of rotary piston machine. In this type of device an externally toothed rotor member is eccentrically offset relative to an internally toothed stator member and in operation these members mesh to form expanding and contracting cells on opposite sides of the line of eccentricity. There is a shaft means for driving the rotor and a distributing valve for feeding and exhausting the cells. The distributing valve, which is normally connected to the drive shaft, is connected to the rotor member for movement therewith adjacent to the rotor and stator member. An annular chamber is formed between the periphery of the distributing valve and the interior of the casing. One set of the distributing ports is formed as ports within the confines of the periphery of the valve. The other set of distributing ports are formed by the periphery of the valve.