Abstract: A gear mechanism for a full-track vehicle has a carrier-like housing (1) in which and on which are only fastened and positionally fixed in respect to each other prefabricated and examined subassemblies (2 to 11), while the functional--operative fluid and electric--connections between the subassemblies (2 to 11) result via flexible connections which compensate for deformations caused by heat and load and deviations caused by tolerance. The fastening of the subassemblies (3, 4, 5, 8) by bearing, centering and fastening elements (12) makes possible, if there is a good positional fixing, a great simplification. The functional connection of the subassemblies (2 to 11) also leads directly, together with the reduction of the coupling points, to a simplification of the gear housing (1) and to a reduction in the cost of machining and control.

Abstract: A gear pump for unidirectionally transporting a fluid such as oil has a stationary housing with an inlet port and an outlet port on opposite sides of the axis of a cylindrical chamber in which a ring with an eccentric inner periphery is rotatable through an arc of 180.degree. between two limiting positions. Freely rotatable within the inner ring periphery is an annular outer rotor with internal gear teeth entrainable by a driven inner rotor with external gear teeth, the latter numbering one less than the internal gear teeth of the outer rotor. A face of the ring has one or more shallow depressions open toward the outer rotor, each depression being spanned by a leaf spring which is anchored to the ring and defines with the outer periphery of that rotor a wedge-shaped gap diverging symmetrically toward its ends to form alternate lodgments for a rotary coupling member such as a ball or a roller.