Abstract: A suspension of bacterial cellulose having a reticulated structure has been conditioned to remain in suspension when the suspension is under shear so that it may be coated on a substrate. The suspension of bacterial cellulose is homogenized and thereafter filtered to provide a bacterial cellulose component having a size no greater than 125 microns. This allows a process for applying bacterial cellulose as a coating on a substrate on a substantially continuous basis, either by roll coating or spraying. It also provides a coated product in which the bacterial cellulose is substantially uniform, taking into account the normal discontinuities of roll coating and spray coating.

Abstract: A fuel injection pump includes a pump barrel (12) against (12) against which is located in sealing relationship a valve block (22). A plunger (15) is reciprocably mounted in a bore (14) in the barrel (12) and the valve block (22) contains a spill valve (26) which can spill fuel from the bore (14) during the inward movement of the plunger. An inlet port (21) is formed in the wall of the bore (14) and is uncovered by the plunger (15) during its outward movement. The inlet port communicates with a first annular space (13) defined between the pump barrel and a surrounding pump body (10). The spilled fuel flows through the spill valve into a second annular space (55) defined between the valve block and the body. The first and second annular spaces have a respective inlet and outlet and are substantially isolated from each other.

Abstract: An electronic fuel injection system for providing variable injection timing for a compression ignition engine having a per cylinder displacement volume of at least 5.5 liters includes individual fuel delivery mechanisms, such as a fuel pump having a constant displacement fuel pumping chamber, and fuel injector for each corresponding cylinder, and has a timing signal generator, such as a multi-track optical encoder coupled to a camshaft, for generating a timing signal and a cylinder index signal. The invention also includes an electronic controller device, such as a plurality of individual controllers, which are responsive to various sensor inputs which include the timing signal and the cylinder index signal, for electronically controlling the individual fuel delivery mechanisms. The fuel delivery mechanisms are responsive to an output signal from the electronic controller device and provide a fuel flow volume range of between 100-1600 mm.sup.

Abstract: A fuel system for a multi-cylinder compression ignition engine includes a tubular body (10) having an internal step (11) against which is located a flanged pump barrel (12), a pair of valve blocks (22, 23) mounted in end to end relationship between the barrel (12) and a mounting block (24) secured to the body by bolts (25) which provide a clamping force which ensures a liquid tight seal between the engaging end faces of the blocks and the barrel. A bore (14) in the barrel (12) houses a pumping plunger (15) and the valve blocks house a delivery valve (41) and a spill valve (26), respectively. The spill valve is controlled by an electromagnetic valve (30) mounted on the mounting block.

Abstract: A reciprocal plunger fuel injection pump has a plunger having an enlarged head at one end. A spring abutment is secured to the head, and has a flange for engagement by the plunger return spring and a surface engageable with the end of the plunger. A spring clip has an apertured base portion engaged beneath the head of the plunger and arms which extend at right angles to the base portion. Some of the arms are turned inwardly to define a hook portion which locate in a groove formed in the spring abutment thereby securing the abutment to the plunger.

Abstract: The invention is drawn to a pump having a piston which is reciprocable within a cylinder. The cylinder has a closed end including a liquid outlet and port means to introduce a liquid into the closed end of the cylinder. The piston has on its peripheral surface a helical groove means fluidly connected to the closed end of the cylinder and a second groove to communicate the port with the closed end of the cylinder when the piston is in a position between a location in which the port directly communicates with the closed end of the cylinder and a location in which the port communicates with the helical groove means. The second groove in the peripheral surface of the piston is located between the helical groove means and the part of the piston adjacent to the closed end of the cylinder. The second groove also communicates with a cutaway portion in the wall of the cylinder that is coaxial with the axis of the port.