Round articulations which can be used for the seats of land, sea and air vehicles

摘要

The movable flange 200 has a central space 200a comprising on its external periphery, a ball bearing 208 housed in a ring 207 holding the external periphery of the fixed flange 206 which also has a central recess 206a constituting a space with the recess 202a of the movable flange 200 in which a satellite gear 213 is housed whose teeth 214, 215 interact with the internal teeth 200b of the movable flange 200 and the other with the external teeth 212 of the fixed flange 206. <IMAGE>