Abstract: When, according to the invention, a multistage planetary gear is constructed with a clutch/brake device (8, 21, 22) and these devices are constructed as remote-controlled or automatically operating clutches/brakes, it is possible to construct multistage gears which are compact, and which are reliable in operation. The gear stages are configured as cooperating tooth engagements (6, 6.1, 6.2) on rotating parts, which ensures the function at high speeds of rotation and allows transfers of great power.

Abstract: When, according to the invention, a one-stage planetary gear is constructed with radially resilient planet wheels and sun shaft (1), and where the centre axes are parallel with the sun axis and positioned closer to it than the axes of the planet wheels (2), a good engagement between the contact-bearing surfaces and thereby a high degree of moment transfer are achieved. It is more-over ensured that the gear can operate at en extremely high number of revolutions.

Abstract: A planetary gear comprising a central, rotatable input/output shaft (1a), an elastic outer ring (4) which when being elastically deformed encloses and presses at least three planet wheels (6, 12) in the form of rollers radially against a centrally mounted sun shaft (2), which extends axially in alignment with the input/output shaft (1a). The planet wheels (6, 12) have central holes and are rotatably mounted on stays (7, 13), the centre lines of the stays (7, 13) being parallel with the sun shaft (2). At least two (12) of the planet wheels have substantially coinciding centres with the stays (13) associated with the planet wheels (12), while the planet wheel or other planet wheels (6) as well as the associated stay or stays (7) is/are constructed such that the centre lines of the stays are positioned a given distance closer to the sun wheel (2) than the axes of the planet wheels (6) when the planet wheels (6) engage the sun shaft (2).

Abstract: A planetary gear comprising a central, rotatable input/output shaft (1a), an elastic outer ring (4) which when being elastically deformed encloses and presses at least three planet wheels (6, 12) in the form of rollers radially against a centrally mounted sun shaft (2), which extends axially in alignment with the input/output shaft (1a). The planet wheels (6, 12) have central holes and are rotatably mounted on stays (7, 13), the centre lines of the stays (7, 13) being parallel with the sun shaft (2). At least two (12) of the planet wheels have substantially coinciding centres with the stays (13) associated with the planet wheels (12), while the planet wheel or other planet wheels (6) as well as the associated stay or stays (7) is/are constructed such that the centre lines of the stays are positioned a given distance closer to the sun wheel (2) than the axes of the planet wheels (6) when the planet wheels (6) engage the sun shaft (2).

Abstract: A planet gear has an input axle (1a), an outer ring (4) which presses planet wheels (6) radially against a central sun axle (2), the planet wheels (6) being rotatably mounted on stays (7), the diameters of which are smaller than the holes in the planet wheels (6). The input axle (1a) has a driver (1) with holes (3) for studs (5) on the outer ring (4), so that the rotation of the input axle (1a) is transferred via the driver (1) and the outer ring (4) to the planet wheels (6) and to the sun axle (2), whereby the stays (7) for the planet wheels (6) are disposed in such a manner that when the applied moment increases, the planet wheels (6) are pressed harder against the sun axle (2) and the outer ring (4) is similarly pressed harder against the planet wheels (6).