Abstract: A differential mechanism (10) having two output cam members (16, 17) rotatable about an axis (A) each cam member having an annular cam surface of undulating form comprising pairs of mutually inclined surfaces (24, 25; 26, 27). The inclined surfaces are engaged by end surfaces (29, 30) of cam followers (28) so that relative contra rotation of the output cam members (16, 17) causes the cam followers to slide axially. An input element (11-14) engages and supports the followers (28) and moves the followers circumferentially relative to the output cam members and a component (11, 14) of the differential which rotates during use of the differential drives oil pump means (70) for forcing oil into the differential.

Abstract: A differential mechanism has two output cam members rotatable about an axis, each cam member having a single annular cam surface of undulating wave form comprising equal numbers of pairs of mutually inclined surfaces. A plurality of cam followers having end surfaces engage the cam surfaces of the output cam members, the arrangement being such that relative contra rotation of the output cam members causes the cam followers to slide axially. At least two different types of cam followers are provided and the number of followers is an integer multiple of the number of pairs of inclined surfaces. An input member slidably supports the followers and moves the followers circumferentially relative to the output cam members. Arrangements are also disclosed for pumping oil into the differential and for locking up the differential.

Abstract: A differential mechanism having two output cam members rotatable about an axis, each cam member having a single annular cam surface of undulating form comprising pairs of mutually inclined surfaces. The inclined surfaces are engaged by end surfaces of followers so that relative contra rotation of the output cam members causes the cam followers to slide axially. An Input element engages and supports the followers and moves the followers circumferentially relative to the output cam members. The input element engages with a radially inner portion of each cam follower to move the follower circumferentially relative to the cam output members, and the cam surfaces are inclined away from the axis of rotation.