Abstract: The invention relates to a hydrodynamic bearing assembly in which a relatively broad bearing is divided into two bearings (2, 3) placed axially side by side. Both bearings are connected together to an inner bearing member (1) which is mounted to swivel universally over a spherical sector surface (16) in a cylindrical bore (18) of a surrounding housing. Between the bearing surfaces of both bearings (2, 3) there is provided in the bearing bore (6) a flowing fluid medium passage shared by the bearings, such as an annular groove (10). Through this passage the outlet flow area for the flowing fluid medium is doubled and length of the flow path in the bearing bore (6) reduced by one-half. Concurrently, a more perfect load pressure equalization is achieved on both bearings (2, 3) owing to the ball-joint-type universal bearing arrangement between the inner bearing member (1) and the housing (20).

Abstract: An axial thrust compensation system in high speed helical gear engagement includes a thrust collar fixed to a shaft which carries a gear. The collar includes a peripheral groove. Another gear carrying shaft includes a disc element which engages the thrust collar groove. Axial thrust generated in the respective gears and the shafts due to the driving engagement between the gears will be transferred between the shafts by the collar and disc. In one embodiment, the collar and/or disc is formed in one piece with its shaft, while in another embodiment the collar and/or disc is bolted to its shaft. A further embodiment provides a pair of disc shaped collars spaced from opposite sides of one gear with the collars framing a pair of disc elements fixed to the other shaft.

Abstract: A driving gear assembly for a double helix extruder. The assembly includes a multiple power path from a transmission gear to produce synchronism in the extruder helix shafts. The structure of the gearing enables a simple adjustment of the proper mesh of the extruder helices when mounting the gearing by mere disengagement and re-engagement of a (normally not disengageable) tooth coupling.

Abstract: A gear drive with single-helix gears in which a pair of such gears mesh with each other and are formed along the length thereof with one or more grooves of a depth equal to or not substantially greater than the tooth height and provided with lubricant-stripping means, e.g. deflectors, to remove the lubricant which passes into these grooves. The grooves of the two gears are aligned in planes perpendicular to the axes of the gears.

Abstract: A drive system securable to a base for connecting a pair of generally parallel drive shafts to a single output shaft has a rigid nondeformable housing supported on the base by primary supports lying in a plane perpendicular to the rotation axes of pinion and drive gears rotatably carried in this housing. Each of the pinion gears is connected through a flexible coupling to one of the drive shafts and the drive gear is connected to the output shaft. The supports are deformable so that stresses which normally misalign the pinion and drive gears are compensated for outside of the housing by these supports and the drive gears remain in perfect alignment. The output shaft may extend completely through the housing and be journaled in front of the housing in a fixed bearing, and the primary supports lying in the symmetry plane of the housing may be gudgeons received in journals and permitting tipping of the housing.

Abstract: A driving and a driven spur gear, lying in a common plane, are operatively coupled with each other through the intermediary of an idler gear in mesh therewith, the idler gear being radially shiftable against a resilient force in the common plane of rotation. The tangent to any tooth flank of both the driving and the driven gear at its point of contact with a tooth of the idler gear includes a pressure angle .alpha. with the common diameter of the meshing gears; the angle .delta. between the two common diameters should be so chosen that the two tangents are substantially perpendicular to each other, with .delta. - 2.alpha. = 90.degree. for rotation in one direction and .delta. +2.alpha. =90.degree. for rotation in the opposite direction.