Abstract: An apparatus and methods are provided for sheltering and/or launching devices such as projectiles or a tracking device. The apparatus preferably includes a main body having a bottom, a plurality of walls connected to and extending upwardly from the bottom, and an inner chamber defined by the inner confines of the bottom and the plurality of walls. An inner chamber cover is connected to the main body for covering the inner chamber of the main body when in a closed position and for accessing the inner chamber when in an open position. A sheltered device mount preferably is positioned in the inner chamber and connected to the main body for mounting a device to be sheltered thereto.

Abstract: In an underground storage space, particularly for endangered goods, access is effected via a left the opening of which, leading into the storage space, can be closed by two covers which are arranged spaced apart from each other.

Abstract: A radial piston engine is provided having recesses in the area of movement of the rollers, adapted to receive roller sections on both roller end faces. For guiding the roller end faces, oppositely located guide surfaces are milled in the cylinder block for said rollers.

Abstract: Braking apparatus, in particular braking apparatus, using discs for use together with a rotary disc support adapted to support a first set of discs. A brake housing is provided which support a second set of discs which are interdigitating with the first set. A brake piston is located in an opening of the brake housing in a reciprocable manner. A Spring biases the brake piston towards the first and second sets of discs. Separately from the brake piston a cover mounted at the brake housing is provided.

Abstract: The invention relates to a radial piston engine, particularly a radial piston motor comprising a cylinder block within which a plurality of pistons and rollers are reciprocally mounted for cooperation with a cam path provided by a cam disc. Detent means are used to releasably locate the cylinders and rollers in a position corresponding with the lower dead point position of the pistons.

Abstract: A radial piston engine comprising: a housing, an annular cam disk fixedly mounted in said housing, a cylinder block rotatably mounted about an axis with respect to said cam disk, a plurality of bores arranged in said cylinder block in a position radially with respect to said axis of rotation, a plurality of pistons respectively mounted in said bores, and cylindrical rollers for supporting said pistons on said cam disk, said rollers having axes which extend parallel to the axis of rotation of the cylinder block, and wherein said bores of said cylinder block which are adapted to receive and pistons are provided with recesses in the area of movement of said rollers, so as to receive sections of said rollers on both endfaces of said rollers.

Abstract: The invention relates to a pump, in particular to an axial piston pump of the swash plate type, wherein the suction pressure medium is fed into the swash plate chamber, so as to be arranged in layers of different pressure. The pressure medium is removed from a desired pressure layer and supplied to the pump chamber so as to obtain a desired pump flow characteristic.

Abstract: The invention relates to a piston machine comprising a plurality of pistons and changeable piston displacement for varying the torque and speed. The pistons are connected via control bores and distributor passages in the distributor of the machine to a high pressure and low pressure connection. To reduce the displacement a switching valve is provided via which the inactive pistons are connected together via their distributor passages and also possibly subjected to an external very low servo pressure or tank pressure. This reduces the frictional losses, increases the efficiency and avoids flow losses of the valve.

Abstract: In a radial piston machine which includes a driven rotatable rotor with radial pistons displaceable in radial recesses of the rotor by pressure medium and carrying rollers which cooperate with a cam track of the rigid cam plate, the length of the rollers can be increased due to the provision in the bores receiving the rollers respective opposing recesses in which portions of the roller are received.

Abstract: A radial piston machine includes a stationary cam plate and a rotational cylinder block provided with radial bores receiving a plurality of radial pistons displaceable in those bores and supported against the cam plate surrounding the cylindrical block by rollers. Each piston has in the region of supporting the roller a web which is cured and supported in one of the grooves formed in the cam plate.

Abstract: The present invention relates to a rotary piston machine comprising a housing which consists of a flange housing, an intermediate housing and an end housing. The flange housing has a flange extending there from landing the machine on a suitable support. A shaft is rotatively supported within the housing, and a rotor is fixedly mounted on the shaft and adapted to rotate together with the shaft. A hollow gear for farming compressing chambers is also located within the housing for cooperation with the rotor. A commutator is fixedly mounted within the flange housing means and is adapted to supply pressure medium to and to remove pressure medium from the compressing chambers.

Abstract: A piston for a hydraulic piston machine in which a piston body receives a ball in a space defined at one end of thereof. A bearing dish supports the ball in the space with an O-ring engaging the recess to seal the bottom surface of the bearing dish. Preferably the bearing dish is formed with a steel support layer, a bronze layer cast onto the steel support layer, and a plastic layer supporting the ball.

Abstract: A radial piston machine has a cylindrical housing which encloses a rotary shaft formed with an eccentric. A plurality of stationary piston rods is connected to the inner wall of the housing and radially directed toward the shaft. The free ends of piston rods are provided with ball-and-socket joints permitting universal rotary movement of the pistons. Each piston slidably engages the inner wall of an assigned cylinder which at its bottom wall slidably engages the eccentric. In a modification, the spherical surface of the stationary ball joint directly engages the inner wall of the cylinder.

Abstract: A rotary machine, particularly a planetary gear motor, has a control plate 4, two annular channels (18, 19) which are arranged on the inner circumference of a cup-shaped housing section 7 and stationary commutators (8, 9) which are arranged side by side adjacent the annular channels. The control channels are coupled together when the transit channel 15 and when the plate and one of the annular channels are aligned with an open corner channel 16 and alternately with the annular channels. A simply shaped and simply manufactured commutator includes two like-formed disk-shaped commutators, which completely intersect alternately with each other. Transit channels 15 are provided and, with the plate cam and one of the annular channels, open into corner channels 16. Both commutators are arranged in such a way that at times a transit channel of a commutator adjoins a corner channel of the other commutator and vice versa.

Abstract: A hydraulic internal gear machine includes a positive displacement unit for working liquid constituted by a rotary outer gear and an inner gear surrounding the outer gear and being in mesh therewith at one point to define a plurality of increasing liquid displacement chambers. The chambers are laterally bounded by a rotary disc which cooperates with a stationary control plate. The disc and the control plates are formed respectively with flow control openings for admitting pressure liquid into a half of the chambers and for discharging the liquid from the other half of the number of chambers. To compensate for the tilting moment acting on the rotary disc, the interface between the rotary disc and the control chamber is provided with arcuate recessed sections communicating with the openings in the rotary disc to apply pressurized liquid in the displacement chambers against both sides of the rotary disc.

Abstract: The hydraulic internal gear machine includes a positive displacement unit for the working fluid, the unit being formed of a rotary outer gear which is rigidly connected to a rotary control plate provided with control openings arranged between respective teeth of the outer gear. An inner gear surrounds the outer gear and meshes at one point with the latter to define a plurality of increasing fluid displacement chambers. The inner gear is supported in the machine housing for performing a circular wobbling movement about the center axis of the outer gear. A stationary control plate adjoins the rotary control plate and is provided with second control openings cooperating with the first control openings in the rotary plate. An axially movable plunger is spring-biased against the stationary control plate and forms with the housing cover two annular spaces connected respectively to the intake port and to the discharge port of the working fluid.

Abstract: The hydraulic axial piston engine has a rotary shaft and a stationary control plate symmetrically connected to a two-piece housing supporting for rotation the shaft. Two stationary lifting cams are arranged opposite each other at the end walls of the housing around the shaft; two rotary cylinder blocks are supported for joint rotation on the shaft and each adjoins a face of the control plate; the end walls of the cylinder blocks facing the cams are provided with a plurality of uniformly distributed and axially directed blind bores for accommodating working pistons. The end walls in each blind bore has a through passage for working fluid and the control plate in the range of the passages has a plurality of uniformly distributed control openings connected alternately to two annular distributing channels formed in the plate, one of the channels being connected to an intake port and the other channel to a discharge port for the working fluid.

Abstract: A gerotor machine has a housing and a displacement unit in the housing. The displacement unit includes an inner gear wheel rotatable about an axis, and an outer gear wheel which has an axis circularly displaceable about the axis of rotation of the inner gear wheel. The gear wheels bound a plurality of displacement chambers therebetween. A plurality of recesses are formed between the teeth of one of the gear wheels, and each of the recesses has two circumferentially spaced control edges at one axial end of the one gear. The housing is provided with a plurality of control openings which are located relative to the axis of the one gear at a radial distance corresponding to that of the recesses. The control edges of the recesses of the one gear cooperate with the control openings of the housing and are operative for communicating the control openings with the chambers of the displacement unit.

Abstract: A rotary fluid displacing apparatus operable as pump or motor comprises a housing in which a fluid displacing unit is arranged comprising an annular stator having a plurality of radially inwardly extending teeth and a rotor within the stator and having radially outwardly extending teeth numbering one tooth less than those of the stator, meshing with the teeth of the latter, and forming between the stator and the rotor spaces increasing and decreasing during rotation of the rotor. Flow of fluid into and out of these spaces is controlled by a stationary control plate and a rotary control disc, both of which are formed with a central opening through which a universal-joint shaft extends which, at one end is tiltably connected to a machine shaft mounted in the housing for rotation about a fixed axis.