Abstract: A planetary drive containing two gear wheels with differing numbers of teeth and a radially flexible planetary wheel in engagement with these gear wheels. The planetary wheel has internal teeth and external teeth and is arranged at least partially in an annular gap between a hollow wheel and a sun wheel. The planetary wheel is forced by a cam element into the gaps between the teeth of the gear wheels in engagement zones. There are four engagement zones distributed around the circumference of the planetary wheel in which the teeth of the planetary wheel engage either the hollow wheel or the sun wheel. A roller bearing is provided between the cam element and the planetary wheel. The drive has a short axial structural length and a low manufacturing cost, assures uniform loading of the gear teeth, and enables the reduction ratio to be selectively predetermined throughout a large range.

Abstract: An apparatus, particularly for compressing and conveying fluids, comprising a rotor (1) and a thin-walled rotary sleeve (7) which is rotatably arranged eccentrically with respect to the axis (M1) of the rotor and which is in surface contact with the surface of the rotor throughout a predetermined angular range (.phi.). At least one separator slide (12) is provided between working chambers (S, D) the volumes of which vary when the rotary sleeve rotates. The apparatus is constructed such that the fluid throughput and the speed of rotation can be increased compared to conventional devices, so that a device of given capacity may have smaller dimensions and a lower weight.

Abstract: An arrangement of roller elements which are guided by means of a guide ring and are arranged between two support rings in which, to reduce the coefficient of friction, deformations are allowed in order to eliminate slippage and decrease friction. The roller elements are each rotatably mounted on and/or by a shaft, and the guide ring is formed to be resilient or yieldable, so that the guide elements can make movements relative to each other. The arrangement is primarily designed as a radial bearing or an axial bearing and can additionally be designed as a frictional drive or transmission.

Abstract: A planetary gear drive comprising two adjacent central gears with different numbers of substantially wedge-shaped teeth which form virtual tooth gaps with one another and define a virtual crown curve and a planetary gear having teeth which are pressed into said virtual tooth gaps by a rotating element. With a difference of four in the numbers of teeth of the central gears, the center of curvature of the virtual crown curve and the radii of the root circles are such that in a predetermined engagement region the entry and exit angles and the radial speed of the teeth of the planetary gear remain substantially constant, and the flank angles of the central gears differ by at least about twice the entry angle. With a difference of two in the numbers of teeth of the central gears, the virtual crown curve largely extends out of the teeth after a 90.degree. rotation, and the engagement region lies in the region of the minimum change of the entry and exit angles.

Abstract: A machine, in particular a working machine for the compression and conveyance of fluids, comprises a cylinder (2) and a thin-walled annular piston (4) arranged eccentrically with respect to the cylinder (2), with the piston being in flat contact either inside or outside with a cylinder wall (8). The cylinder (2) or the cylinder housing, contains a parting element (12) whereby a suction chamber (33) is separated from a pressure chamber (35) between the cylinder and the annular piston (4) and whereby by means of a rotating body a rotating motion may be imparted to the annular piston (4). The annular piston (4) is to be exposed to low alternating stresses and between the cylinder (2) and the annular piston (4) a low local surface pressure is to be achieved, while assuring a reliable contact in the rolling range (A).

Abstract: Gearbox comprising a first clutch-hub having gear-teeth and a coaxial hollow wheel also with gear-teeth, connected to, but not rotating upon, a second clutch hub, and also having a planetary gear in part engagement with the gear-teeth and an adjustable transmission-shaft. The latter is adapted to be adjusted, by means of an adjusting device, in such a manner that the clutch-hub and the hollow wheel rotate selectively, either at rotational speeds between which there is a predetermined difference, or in synchronism. In a known gearbox of this kind, the planetary gear is arranged eccentrically upon the transmission-shaft, causing relatively considerable imbalance and relatively high bearing loads at high rotational speeds. In order to overcome this problem, and to achieve a simple design, especially of the transmission shaft, the invention proposes that the first clutch-hub comprise a radially spaced, internally toothed ring, creating an annular space.

Abstract: A shaft-coupling having two halves, each formed with at least two flat, sloping surfaces running at right angles to a load-transfer direction, each pair of sloping surfaces, facing each other on the two halves of the coupling, defining a space therebetween. Arranged in these spaces are sliding wedges each comprising two flat, sliding, surfaces facing away from each other and supported upon a pressure-element. In order to ensure that a shaft-coupling of this kind be suitable for large torsion-angles, absorb high torques and, in addition, has a small structural volume, a spring-element, adapted for the radial spring-action, is provided between at least one sliding wedge and the pressure-element.

Abstract: A fluid-flow machine, particularly of the hydraulic propeller-pump type, comprises a central hub, a bearing support fixed to the hub for rotation therewith, a plurality of blades distributed symmetrically around the hub, each blade having a pivotable blade-root for adjusting the angle of attack of the blades. The blade-roots are mounted on the bearing support for rotation around the longitudinal axis of the hub. An adjusting device pivots the blades about the longitudinal axis of the blade-roots, the latter including, for each blade, a self-locking reduction gear and a drive shaft. The bearing support is formed with open-ended housings, each corresponding to one of the blade-roots. The drive shafts, the reduction-gears and the blade-roots are mounted, at least partially, within the housings aforesaid.

Abstract: The invention relates to a planetary gear having two adjacent identical central wheels of different pitch and a planet wheel whose pitch is equal to that of a virtual tooth row formed by the central wheel teeth. The teeth of the planet wheel extend into the tooth gaps between the virtual tooth rows. The planet wheel is guided and driven by a rotary disk. At least two of the three wheels have pivotable teeth. The teeth of both the central wheels and the planet wheel are of substantially triangular cross section with plane tooth profiles. It is a main objective of the invention to provide a planetary gear permitting the flank angles of the virtual tooth gaps to be adapted to the profile angle of the planet wheel teeth, in particular, in order to transmit large torques and/or also in order to achieve low speed ratios. According to the invention, the pivotable teeth of at least one central wheel are arranged on journals.

Abstract: A fluid driving or fluid driven machine includes an outer cylinder housing stationary piston. The piston includes a generally annular flexible band of smaller circumference than the inner circumference of the cylinder, and a rotary body accommodated within the band. The rotary body has three rollers for urging the band against the inner surface of the cylinder at three angularly spaced locations so that the band defines with the cylinder three working chambers. Two separating members mounted on the cylinder are biased into contact with the band.When the rotary body is rotated the band makes nonslip contact with the wall and rotates the working chambers about the axis of the rotary body. Each separating member separates each working chamber as it passes into two discrete enclosures. A port is located on each side of each separating member to allow communication with the two discrete enclosures. The machine can be operated as a compressor when the rotary body is driven or as an engine to drive the rotary body.

Abstract: In an elastic coupling with two similar central gears assemblable on respective shaft ends and having rows of teeth, respectively, disposed adjacent one another, and a planet gear with a row of teeth having an angular pitch equal to that of the rows of teeth of the central gears, the central gears being turnable elastically resiliently so that the flanks of the teeth of the central gears form generally wedge-shaped virtual tooth gaps having a profile varying with reciprocal turning of the central gears, the teeth of the planet gear being also generally wedge-shaped and projecting into the generally wedge-shaped virtual tooth gaps, the tooth flanks of the teeth of the planet gear being in direct contacting engagement with the tooth flanks of the teeth of the central gears, and the teeth of the planet gear and the teeth of the central gears being spring-biased radially toward one another so that the teeth of the planet gear remain fully in engagement in the virtual tooth gaps.