An air filter for removing particulate matter from an airstream comprising a casing with a first air guide means for efficiently directing the uncleansed particulate-laden air into an inertial separating means enclosed within said casing, said inertial separating means adapted to remove relatively heavy particles from the airstream; a second air guide means for efficiently directing the airstream from said inertial separation means to the outer surface of the filter media of a filter enclosed within said casing and surrounding said inertial separating means, said filter media removing substantially all of the remaining particulate matter from said airstream; and a third air guide means for efficiently directing the now cleansed airstream out of said air filter.
In combination with a ring-shaped air filter for the entry of air into the carburetor of an internal combustion engine, a vortex generator in the form of a series of vanes mounted within the interior of the ring-shaped air filter. The vanes are specially configured to produce a turbulent pressurized vortex which is moved through the carburetor which results in producing (1) a more homogeneous fuel/air mixture, and (2) increases the pressure of the fuel/air mixture. As a result, more efficient burning of the fuel occurs producing increased efficiency of the internal combustion engine.
An air cleaner to remove particulate matter from an air stream, and to dampen sounds emitted to the air cleaner by an internal combustion engine receiving air from the air cleaner. Such sounds are commonly conducted upstream through conventional air cleaners and are heard emitting from the inlet of the air cleaner. The air cleaner of this invention both effectively cleans the air and diminishes said sounds. The air cleaner has a partition dividing its interior into a unit chamber holding a filter element unit, and a passage chamber receiving air to be cleaned and conveying it to an opening in the partition leading to the unit chamber. The shape and location of the passage chamber assist in the reduction of sound transmitted upstream.
A separator which can be used for separating water from an air/water mixture in an aircraft where the air is to be supplied to electronics equipment comprises a chamber containing a generally tangential inlet tube through which a mixture is supplied to a curved side wall section of the chamber to separate water from the air by centrifical action. The efficiency of the unit is improved either by moving the filter unit away from the center of the chamber or by providing a guide plate between the filter unit and the curved side wall on which the water coalesces. In this latter case, the filter unit can also be offset from the center of the chamber to give even greater improvement and efficiency.
The cleaning arrangement (1) is provided for the combustion air (2) of an internal combustion engine (3) in a portable handheld work apparatus such as a cutoff machine. The cleaning arrangement is formed from a filter housing (4) which contains an air filter (5) in order to ensure a disturbance-free operation especially for a dust-laden ambient air of the work apparatus. The air filter (5) partitions the filter housing (4) into a contaminant space (7) and a clean space (8). The clean space side (8) is connected to a carburetor (9) of the engine (3). To minimize the dust deposit on the contaminant space side of the air filter (5), a centrifugal-force separator (11) is arranged in the filter housing (4) and is charged with combustion air (2) which is supplied under pressure by a cooling air fan (30) via a feed channel (24) to the separator (11). In the centrifugal-force separator (11), the combustion air (2), which is laden with dust (33), is divided into a tangential flow (14) having a higher particle density (15) and a core flow (12) having a low particle density (13). The core flow (12) is supplied to the contaminant chamber (7) of the filter housing (4).
