Abstract: A valve (10) is disclosed comprising a valve housing (14) including a valve seat (12), a valve head (16) movably housed within the valve housing (14) for seating with the valve seat (12), and a lip seal (30) connected to either the valve head (16) or the valve seat (12). The lip seal (30) is configured to be hydraulically biased into contact with the valve seat (12) or the valve head (16) to maintain closure of the valve.

Abstract: A rack and pinion steering gear (10) for a vehicle, wherein the steering gear (10) comprising an input shaft (18) rotatable about a first axis (50) and adapted to provide steering input to the steering gear (10), and a rack (12) laterally displaceable with respect to a steering gear housing (17). A pinion (14) laterally moveable with respect to the housing (17) substantially in a direction of travel of the rack (12) whilst engaged with the rack (12) thereby effecting a change in steering angle ratio. A swing arm (16) rotatable about a second axis (52) fixed with respect to the housing (17), the swing arm (16) having the pinion (14) journalled thereto, and the pinion (14) rotating about a third axis (54) fixed with respect to the swing arm (16). The first axis (50) being with respect to the housing (17).