Gear transmission

A face gear equipment comprising a rotatable drive shaft for driving the equipment, and a rotatable driven shaft driven by the equipment, at least two serially connected rolling face gear units, a first, inlet face gear unit having a first transmission member and a second transmission member, the first and second transmission members being disposed in spaced parallel relationship and having on their confronting faces transfer grooves in which there are rollingly disposed a plurality of angularly spaced transfer elements such as balls, the transfer elements being arranged in a guide gear in the form of a plate-like member which is journalled in its central portion upon a first eccentric guide pin on the drive shaft of the gear equipment, the first transmission member being a fixed mounted plate, the second transmission member being of a plate-like form and being journalled in its central portion upon a second eccentric connected to the drive shaft, said second eccentric being a guiding pin for the second transmission member, a second rolling face gear unit including the second transmission member functioning as a driving element thereof and a third transmission member in the form of a plate-like member disposed in spaced relationship with respect to the second transmission member, the confronting faces of the second being provided with face transfer grooves in which there are rollingly disposed a second set of angularly spaced transfer members in the form of balls, the second set of transfer members being held in angularly spaced relationship by a second guide gear in the form of a third plate disposed between the second and third transmission members, a second eccentric stabilizing pin which is drivingly connected to the drive shaft of the gear equipment, the second guide gear being journalled adjacent its center portion upon the second eccentric stabilizing pin, the third transmission member being drivingly connected with the rotatable driven shaft driven by the equipment.