Abstract:
This invention relates to a filter in which a fuel pump for drawing fuel from a tank and a fuel filter unit for filtering foreign matter from the fuel which has been drawn from the tank by the fuel pump are integrally assembled together. More particularly, the invention relates to a filter improved such that the amount of electric charge, which builds up on the filter, is not increased to such an extent that the resin is rapidly deteriorated. In one embodiment, when forming a filter by assembling a generally cylindrical filter element around an outer periphery of a generally cylindrical pump, a cover for covering the filter element is made of a nonconductive material, and the generally cylindrical filter element is of the type which filters foreign matter from the fuel by causing the fuel to flow radially therethrough. With this type of filter element, the amount of electric charge can be reduced. Therefore, by covering the filter element with a nonconductive cover and disposing it within a tank, corona discharge is generated from the surface of the cover when the cover is exposed above the fuel remaining in the tank to thereby present a problem of electric discharge. Thus, the amount of electric charge on the surface of the cover can be controlled so as not to increase the resin deterioration rate.
Abstract:
A fuel supply apparatus for installation in a fuel tank includes a fuel pump, a housing, and a filter element disposed in the housing and having an upstream side communicating with the discharge port of the fuel pump. A check valve communicates with a downstream side of the fuel filter, and a pressure regulator communicates with the upstream side of the filter element. A sedimentation flow path may be provided for removing sediment from fuel discharged from the pressure regulator. The sedimentation flow path may be substantially cylindrical vortex spaces between fins disposed on the inner periphery of the pump holder and has blind holes at the bottom for trapping the sediments.
Abstract:
A fuel filter 10, constructing a supply unit 8, comprises a filter case 11 having an electric conductivity and a filter element 14. The filter case 11 is formed with an inside wall portion 11A and an outside wall portion 11B into a U shape in lateral cross section, so as to enlarge a contact area contacting with fuel in a fuel tank. The fuel discharged from the fuel pump 9 flows into a fluid chamber 15 of the fuel filter 10, and then be supplied from a fuel supply conduit 20 through a fuel flow passageway 12A to the outside. At this time, static electricity charged in the filter case 11 is discharged through its outer peripheral surface into the surrounding fuel having a slight electric conductivity.
Abstract:
A filter apparatus (10) which dissipates static charge from fluid flowing through the apparatus has a filter housing (12) enclosing a filter element (14). The filter element includes a tubular filter media assembly (15) which incorporates a conductive structure to draw off static charge in fluid passing through the media. The tubular filter media assembly comprises an outer steel mesh support layer (24); a first intermediate layer (25) of a filtration media; a second intermediate layer (26) of a carbon material, e.g., stainless steel, nickel or carbon fiber mesh, mat or matrix; and an inner steel mesh support layer (27). The filter media assembly is pleated and disposed around a central perforated conductive tube (16). The filter media is electrically connected at one or both ends through conductive adhesive or epoxy to at least one conductive end cap (20, 22). The conductive end cap has a central opening (33, 34), and receives a portion of the grounded filter housing (50, 52), for example, an inlet tube. A conductive elastomeric O-ring seal (48, 49) is disposed between the conductive end cap and the respective portion of the filter housing extending through the end cap opening. The O-ring seal electrically connects (grounds) the conductive end cap(s) to the respective housing portion to provide a flexible ground path for carrying away static charge in the fluid passing thorough the cartridge.
Abstract:
In a fuel filter module for introducing fuel from a fuel inlet into a casing and for removing foreign matter from the fuel by passing the fuel through a fuel member and for discharging the fuel through a fuel outlet to the outside of the casing, and the casing is formed to have a D-shaped cross section. With this construction, the outer diameter of the casing is not increased even when an accessory is assembled on the outside plane wall of the D-shaped casing. The casing accommodates a filter member of C-shaped cross section. The center of a C-shaped sealing member provided for sealing the upper edge of the filter member is offset from the center of the casing. By thus offsetting, sufficient areas for fuel inlet and outlet can be ensured without increasing the size of the casing.
Abstract:
A device and method for removing a static charge from electrically non-conductive fluids includes a metallic enclosure 12 that receives fluid flow therethrough, a conductive member 18 in said enclosure 12, engaging the conductive member 18 with the fluid flow and grounding the conductive member 18.
Abstract:
A fuel pump for pumping fuel is provided in a sub-tank suspended in a fuel tank in order to reserve a fuel volume necessary for the fuel pump to be started on an inlet side of the fuel pump in the fuel tank. A fuel level holding member formed so as to rise upward on a suction opening side of the fuel pump reserves the fuel in space of the risen part. Thus, a structure for reserving the fuel volume pumped by the fuel pump in the fuel tank can be obtained with a simple construction.