Abstract: An edge type filter for liquids comprises an elongated member which has spaced cylindrical portions which are a close fit within a bore in a filter body. The part of the member intermediate the cylindrical portions the member is of square section to define with the wall of the bore, controlled clearances which provide the filtering action. Grooves place alternate ones of the flow channels defined between the wall of the bore and the sides of the part with either the inlet or the outlet. The member is retained in the bore by providing on the cylindrical portion adjacent the inlet, a projecting edge which is defined at the junction of a radial end surface of the cylindrical portion and a side surface which inclines inwardly towards the surface of the cylindrical portion. At the outlet end the member is located against the end of the bore.

Abstract: A fuel injection nozzle for supplying fuel to an internal combustion engine includes a nozzle holder which defines a chamber containing a spring which biases a fuel pressure actuated valve member to the closed position. Fuel leaks into the chamber in use and is allowed to escape from the chamber through a passage into a space defined between the holder and a surrounding sleeve. The sleeve carries a boss in which is formed an outlet communicating with the space. Fuel tight seals are provided between the sleeve and the boss.