Abstract: An engine filter assembly for cleaning cooling air for an internal-combustion engine for use in high-debris environment such as in roofing-removing machines includes a filter housing attached to the machine at a remote position. The filter housing houses a two-stage air filter that consists of a cylindrical-shaped filter element with an outer pre-filter covering. Both the carburetor air inlet and a fan housing leading to the cooling fan on the engine are connected to the filter housing by tubing. A shield protects the engine from direct contact with loose or air-borne materials during the operation of the machine. A thermal sensing device reads the temperature of the engine and automatically shuts down the engine if the temperature rises beyond specification, reducing the chance of engine failure.

Abstract: An engine filter assembly for cleaning cooling air for an internal-combustion engine for use in high-debris environment such as in roofing-removing machines includes a protective element housing attached to the machine at a remote position. The protective element housing houses a two-stage air filter having a cylindrical-shaped filter element with an outer pre-filter covering. An air inlet housing on the engine is connected to the protective element housing by a flexible coupling link. A shield protects the engine from direct contact with loose or air-born materials during the operation of the machine. A thermal sensing device reads the temperature of the engine and automatically shuts down the engine if the temperature elevates beyond specification, reducing the chance of engine failure.

Abstract: Thin plate-like electric heaters are disposed among multi-layer cylindrical filters for capturing particulates in positions without contacting with the filters. As the means for more reducing the power supply to the heater as the position of the heater is closer to the central cylinder of the multi-layer filters, the thicknesses of the thin plate-like electric heaters or the geometrical patterns of the electric conduction paths are changed to thereby set the resistance values of the heaters in advance in order to reduce the temperature of the central-side cylinder which is apt to be high to thereby realize the balance with the temperature of the outer-circumferential cylinder, or the electric conduction quantity to the heaters is selectively more reduced as the position of the heater is closer to the central cylinder to realize the balance of temperature distribution with the filter on the outer-circumferential side filter.

Abstract: An air filter for a vehicle engine includes an outer frame having ribs and an inner frame nested within the outer frame, the inner frame having air redirecting baffles. The outer frame includes a central downwardly-depending finned support that extends between the baffles of the inner frame, and a non-inverted portion of a filter element is held between the baffles and ribs, while an inverted portion of the filter element is held taut between the finned support and the baffles. The presence of both an inverted and non-inverted portion of the filter element, as well as the multi-fluted configuration of the filter that is established by the cooperation of the ribs and baffles, optimizes the air filtration surface of the filter. The filter element is pinched between a bottom flange of the outer frame and a groove on the base of the inner frame that receives the bottom flange therein. With this structure, a filter element characterized by, e.g.

Abstract: A filter device for filtering a fluid, in particular for filtering the air flowing into the passenger compartment of a vehicle. The filter element (10; 60) including filter material (12; 62) with a border (14; 64) and a filter element frame (20; 70) connected with the filter material (12; 62) and extending at least partly along the border (14; 64), the filter element frame (20; 70) being provided with a projecting resilient sealing lip (24; 74) for abutting a device (42, 44, 48) receiving the filter element (10; 60), the sealing lip (24; 74) having at least one bending section (26) of a first thickness (30) facing the filter element frame (20; 70) and at least one enlarged section (28) adjoining the at least one bending section (26) and facing away from the filter material (12; 62), at least a part (40) of the enlarged section being of a second thickness (32) greater than the first thickness (30) in the at least one bending section (26).

Abstract: An air cleaner device is disposed beside an engine chamber. A connection pipe is connected to the engine chamber and the air cleaner device. The air cleaner device is adjacent to an accumulator. The air cleaner device has a lower box, an upper cover covering the lower box, four clamp devices disposed on four upper corners of the lower box, and a filter device disposed in the lower box. A connection pipe is connected to the upper cover. An air inlet pipe is connected to the lower box. An air activation block is disposed on the filter device. A large number of air passages are formed on the air activation block.

Abstract: An air filter, especially for cleaning combustion air for internal combustion engines. The air filter includes a substantially cylindrical housing having a raw inlet and a pure air outlet. A pure air outlet is fitted substantially concentrically on the face of a cylindrical housing. The raw air inlet is fitted on the surface of the housing jacket, and an essentially menthol-free filter element is secured in the housing. The housing aperture is fitted with adaptive systems having an integrated dirt extractor.

Abstract: A high performance air intake for an automotive engine has an oiled gauze filter of inverted conical form, including an inverted, shaped inner apex, the filter fitting within an in-line filter body that forms a part of a slender intake line. The in-line form of the filter enables the pick-up of intake air from a cool zone below the engine, with little subsequent heating of the air, resulting in enhanced breathing of the engine, with observable performance enhancement.

Abstract: A low restriction air filter is especially useful for racing engines and includes a filter media of spun-bonded synthetic material, such as polyester co-pleated with a metal screen on the dirty side of the filter. An expanded metal aluminum screen surrounds the clean side of the filter media and annular end seals made of plastisol seal the axial ends of the filter media. The filter element has an inside diameter of about 14 inches, a height of about 4 inches and a filter media thickness in the radial direction of about 1 inch.

Abstract: A carburetor air intake velocity stack engagable with a carburetor inlet, has a cylindrical throat section having first and second ends. The first end is adapted to be coupled to the carburetor, while the second end is open to the air. A shaped, mesh filter having an effective open area which exceeds the open area of the velocity stack by at least about 50%, is located within said air intake velocity stack. The filter has a cylindrically formed flange member which is trapped between said air intake velocity stack and the carburetor.

Abstract: A combined air cleaner and noise attenuating resonator device including a hollow cylindrical air cleaner element pressed to a fitting on a hose, the fitting latched to the housing in a position holding the air cleaner filter element within a cavity in a housing. An expansion chamber and a Helmholtz resonator chamber are both defined in part in the housing and by an insert piece within the housing which also forms an air flow passage in fluid communication with each chamber.

Abstract: To provide a filter element for an air cleaner unit for an engine including an elongated rectangular contour as seen in a plan view and having a corrugate sectional contour as seen from the front side, the one end side of the corrugated sectional contour is collected on the central side of the filter element, the other end side of the same is expanded to exhibit a substantially circular contour, the opposite ends of the filter element as seen in the circular contour are connected to each side by the side-by-side relationship to exhibit a substantially annular contour as seen in a plan view, and subsequently, a cover member designed to have a conical-shaped or a spinner-shaped contour is attached to the upper surface side and/or the lower surface side at the central part of the filter element main body.

Abstract: A hand-held working tool has a housing and an air cooled internal combustion engine with cooling ribs positioned in the housing. A sealed carburetor box is connected to the internal combustion engine. A blower is positioned in the housing for supplying cooling air to the combustion engine. The blower sucks in cooling air in the axial direction of the blower and conveys it tangentially in the direction of rotation of the blower to the cooling ribs. The housing has a blower cover. A combustion air channel is positioned on a pressure side of the blower and connected to the blower cover and the carburetor box, and the internal combustion engine sucks in combustion air through the carburetor box. The channel has an inlet for branching off combustion air from the cooling air flow that is conveyed to the combustion engine. The inlet is in the form of at least one slot within the blower cover. The inlet has at least one deflecting element with a deflecting front surface for guiding the cooling air and a back side.

Abstract: In installed position, a filter, comprising a removable particulate filter medium, is disposed in an induction air passage in circumferentially perimetrically sealed relation with the passage side wall. The passage wall has an opening providing for a drawer to be slid into and out of the passage. The drawer has a perimeter that bounds an open center and that supports the filter in covering relation to the open center. Once the drawer has been slid into the passage sufficiently to have passed the filter completely into the passage, the filter abuts the passage wall to prevent further insertion of the filter. Thereupon, continued sliding of the drawer into the passage moves the filter transversely into perimetrically sealed relation with the passage wall, thereby constraining air to pass through the filter medium. The filter is supported in final position by underlying support surfaces on the drawer.

Abstract: An illumination fixture (10) for a vehicular air cleaner housing (14), which is arranged and configured to position the fixture in the interior (13) of the housing's intake section (27). The illumination fixture is also arranged and configured to illuminate through a screen (20) of the intake section the exterior (41) of the housing with a source of illumination (16). The illumination fixture includes a panel (11) having an outer circumference (12) configured to pass through the interior (13) of the intake section. The panel includes one or more apertures each in which a source of illumination is positioned. Diametrically opposed mounting bracket attachment sites are also positioned in the panel to which fasteners are positioned for attaching mounting brackets to the panel. Mounting brackets (17) each include a panel attachment site (18) for attachment to the panel and an intake section attachment site (19) for attachment to the intake section.

Abstract: A device for centrifugal purification of combustion air in an internal combustion engine, especially for a motor saw, wherein the engine has an air cooling system including a fan wheel (19) provided in a helical fan housing (18). The device includes an air nozzle which defines an air passage for conducting combustion air from the fan housing to the engine. The air nozzle (10) is located adjacent to the fan wheel. The nozzle has an inlet (12) including a baffle wall (14) located close to the periphery of the fan wheel and conducting air to the inlet. The baffle wall has a part-elliptical shape as seen in the direction of air flow.

Abstract: A suction air filter for an internal combustion engine with a diaphragm carburetor, wherein the combustion engine has a suction channel for taking in combustion air from a clean air side of the air filter and for taking in fuel from a fuel chamber, wherein the diaphragm of the diaphragm carburetor controls the intake of the fuel into the fuel chamber, and wherein the dry side of the diaphragm is loaded with the pressure of the clean side of the suction air filter, has a housing and a filter body including a block of foamed plastic material and a blocking layer connected to one side of the block. The filter body is positioned in the housing such that the blocking layer is located at the clean side of the suction air filter.

Abstract: An air filter includes a base member, a filter element, a connector for connecting the base member to a support, and releasable securing members for releasably securing the filter element to the base member. When the securing members are released, the filter element is removable from the base member while the base member remains connected to the support.

Abstract: The present invention involves a self-cleaning air filter assembly for an internal combustion engine. An air stream is directed into an air filter housing and a portion of the air stream is filtered by an air filter assembly which may include one or more filter media and the remaining portion of the air stream is discharged from the air filter housing through an exit opening. Particulates contained within the excess air are discharged along with the excess air through the exit openings and are not deposited on the air filter. Vibration of the air filter due to operation of the engine also loosens previously filtered particulates which are also discharged through the exit openings with the excess air. The cleaned air which is passed through the air filter is used in the combustion process.

Abstract: An air intake system for a cab and engine of a vehicle is shown and described. In a preferred embodiment, dry, ambient air is provided to the cab and engine through a duct that is mounted to an inner surface of a vehicle hood such that the hood forms a top surface of the duct. The duct is relatively narrow across the width of the hood and flares into an air chamber on either side of the hood. An air inlet opening is provided on both sides of the hood such that outside air is drawn into the air chambers. The velocity of the air drops as it passes into and through the air chambers, causing the moisture in the air to separate and drain from the air chambers through an evacuator valve provided in the bottom surface of each chamber. Two openings are provided in the bottom surface of the duct. One opening sealingly engages an opening in the engine air cleaner and the second opening sealingly engages a cab air intake duct, when the hood is in a closed position.

Abstract: An air intake duct is formed on an upper case of an air cleaner. The bottom surface of the air intake duct is also an upper surface of the upper case. An opening portion of the air intake duct is opened rearwardly of the vehicle, and a recessed portion is formed on the upper surface of the upper case at a portion in front of the opening portion of the air intake duct relative to the air flow direction in the air intake duct. As a result, the bottom surface of the opening portion is formed higher than the surface of the recessed portion. The bottom surface of the air intake duct is formed to be gradually upwardly inclined in the direction of the air flow in the air intake duct traveling from the opening portion of the air intake duct to an opening portion formed on the upper surface of the upper case.

Abstract: A suction air filter for an internal combustion engine of a hand-held working tool has a housing having an inlet opening for air sucked in and an outlet opening for the clean air exiting the suction air filter and supplied as combustion air to a suction channel of the internal combustion engine. The housing includes a plurality of filter chambers arranged in series one after another in a direction of air flow from the inlet opening to the outlet opening. Each one of the filter chambers has at least one filter body positioned therein through which filter body the air flows.

Abstract: An automotive air intake assembly having a conduit is integrally molded to a rigid plastic striker plate without the need of additional fasteners or adhesives. The striker plate has an annular planar portion and a beveled portion surrounding the planar portion. The planar portion has first and second surfaces and a plurality of apertures therethrough. The first surface mates with an air cleaner. Members on the second surface bisect the apertures and form an attaching surface. An elastomeric conduit is integrally molded about the attaching surface to permanently fasten the conduit to the striker plate.

Abstract: An air cleaner for use in an intake air passage connected to an engine of a vehicle, including a housing separable into two housings, a filter element received in one of the two housings, a sealing member for sealing contact with a sealing surface of the other housing, and a hinge device for rotatably connecting the two housings to each other, the hinge device including a receiving member having a receiving opening, and an axis member for being received in the receiving member through the receiving opening, the axis and receiving members being displaceable relative to each other substantially along a plane in which the sealing member extends, the air cleaner further including a clamp device cooperating with the hinge device to secure the two housings to each other, and a protector including two abutting portions, the protector allowing the sealing surface and the sealing member to be brought into the sealing contact with each other when the axis member is positioned at a hinging position in the receiving memb

Abstract: An air filter having a filter element, a support, and a seal. The support is a substantially flat and flexible screen to allow air to pass through the support. The seal is connected to a perimeter of the support and across a middle section of the support to form two sections. The filter element is attached to the support at only one of the sections.

Abstract: An air cleaner apparatus for an internal combustion engine having a filter element with a generally planar face disposed in a direction parallel to the flow of air, the apparatus includes a central portion and an air guide disposed adjacent the central portion. The central portion communicates with the air guide through the filter element. The central portion has at least one air inlet in operative communication with the engine for permitting the flow of air from the air guide through the filter element and into the engine. The air guide includes an air scoop and an air exhaust, each disposed in a plane generally perpendicular to the direction of the flow of air relative to the housing. The air scoop and the air exhaust are disposed at opposite ends of the filter element such that a portion of the flow of air entering the air guide through the air scoop enters the central portion through the face of the filter element. The remainder of the flow of air exits the air guide through the air exhaust.

Abstract: An insert device for smoothing air flow from air filters to carburetors. The device is suitable for turning an air stream from an intake air passageway, which is directed inwardly along a plane from a periphery towards a center to a fuel/air mixing chamber having an annular downwardly flowing mixing passageway with a longitudinal axis at the center. The insert device includes a first end adapted to be operably located concentrically with the annular fuel/air passageway, and a second end opposite the first end. The first and second ends have a central axis extending therebetween. The second end has a center and an upper wall extending outwardly therefrom. A peripheral wall of diminishing outside diameter begins at a point spaced outwardly near the center of the second end and extends smoothly to a point of minimum diameter. From the point of minimum diameter, concave shaped subwalls of slightly increasing size extend downward to the first end.

Abstract: An improved centrifugal air cleaning system including a fan, a fan volute defined, in part, by a curved outer wall and a base wall, and a deflector wall projecting from the base wall intermediate the fan and the outer wall. An air inlet port is formed in the base wall and is located between the deflector wall and the outer wall. The deflector wall includes a first wall portion and a second wall portion. The first wall portion has a curvature generally matching a curvature of the fan while the second wall portion diverges from the fan toward the outer wall. The first wall portion prevents radially projected particles from reaching the air inlet port while the second wall portion cooperates with the outer wall to define a restricted flow path downstream of the air inlet port that creates a relatively high pressure condition at the inlet port and injects substantially particle-free air into the carburetor.

Abstract: An air path is provided in the main body of a chain saw so as to connect an air inlet port provided on the main body and a carburetor chamber of the internal combustion engine and also connected to a cooling fan chamber. For use under normal conditions, combustion air is taken from the air inlet port into the carburetor chamber. In case of a rainy or snowy day, the air inlet port is closed and combustion air is taken from the cooling chamber into the carburetor chamber, air control means is provided between the air path and the cooling fan chamber. This air control means generates stagnation of air flow in the cooling chamber in order to supply air into the carburetor chamber and prevent dust and the like from being taken into the air path.

Abstract: An air filter for an internal combustion engine has a housing with an interior chamber. The housing has housing walls at least one of which is in the form of a filter element. One of the housing walls has a suction opening for connecting the air filter to a suction channel of the combustion engine, wherein combustion air flows through the filter element into the interior chamber and from the interior chamber through the suction opening into the combustion engine. Air flow resistance elements are arranged in the interior chamber upstream of the suction opening. The air flow resistance elements are arranged in a first and a second row. The first and second rows are spaced apart from one another in the direction of flow of the combustion air. The air flow resistance elements of the first row of the second row are spaced laterally from one another to form gaps therebetween. The air flow resistance elements of the first row are positioned so as to be substantially aligned with the gaps of the second row.

Abstract: A two-stroke internal combustion engine for a motor saw includes a crankcase (12), a fan housing (19) having an impeller (20), and a carburetor chamber (17) having a carburetor (16). An intake passage (15) connects the carburetor to the crankcase and the carburetor chamber is connected via an inlet passage (21) to the fan housing at the outlet side of the impeller for centrifugal purification of combustion air. The carburetor chamber (17) has an opening (22) connected to atmosphere or to a lowpressure zone of the fan housing (19).

Abstract: There is provided a filter element of an air cleaner unit of an open element type which prevents turbulent flow from arising to lower the air suction sound and avoid the loss of sucked air by the turbulent flow. In a filter element in which a major diameter side opening of a tapered cylindrical filter member with a zigzag shaped cross section is connected to a suction duct of an engine, a rectifying cone member for covering a minor diameter side opening by the root thereof is vertically mounted inside the minor diameter side opening so that its leading end is positioned at or near the end of the major diameter side opening of the filter element, and furthermore, the inner side of a suction duct connecting member formed at the major diameter side opening is shaped like an air funnel.

Abstract: An improved air filter has a plurality of tubular or cylindrical openings extending through a lower plate which are aligned with the venturis in a carburetor. The venturis in the carburetor draw in air through the filter. The openings in the air filter eliminate the turbulence or efficiency losses typically resulting from the use of an air filter. The openings are constructed to guide the air flow thus increasing the air volume through the carburetor. The inventive air filter configuration results in a seven to eight percent decrease in air flow over free air flow through the carburetor. Prior art air filters result in decreases on the order of twenty percent. In the use of carburetors for racing applications, the addition of approximately a twelve percent increase in air flow with the inventive air filter configuration provides enormous unexpected benefits.

Abstract: The invention concerns an arrangement relating to a cutting machine, a circular saw machine, a chain saw machine or the like, which is powered by an internal combustion engine. The machine comprises a working unit and a power unit, the power unit comprising at least a pre-filter and a main filter for intake air, and a motor cylinder. The pre-filter and the main filter are provided in a closed pre-filter chamber and in a closed main filter chamber, respectively, the pre-filter chamber forming a top portion of the power unit extending substantially over the entire length and substantially over the entire width of the power unit. The main filter chamber is located under the pre-filter chamber. A closed hood space is provided between the upper side of the pre-filter body and the inside of the roof of a filter cover, and a passage extends from the closed hood space at the side of or through the pre-filter chamber and the pre-filter body, down to the main filter chamber located under the pre-filter chamber.

Abstract: An air filter for an internal combustion engine which has a filter insert is arranged in a housing having a clean air outlet and an unfiltered air inlet provided with a screen. An auxiliary unfiltered air inlet is also provided which is closed by a flap under normal operating conditions but which opens under the influence of a negative pressure generated in the filter housing if the screen becomes clogged because of snow or ice entrained in the air stream, so that air can enter the filter through the auxiliary air inlet.

Abstract: An air cooled internal combustion engine for a hand-held power tool has a flywheel fan that is rotated within a fan housing. The bottom of the fan housing, which is perpendicular to the axis of rotation of the fan, includes an opening for an air duct. Ramps axe formed around the leading edges of the duct opening, either on a plate (metal or plastic) attached to the housing or integrally with the bottom wall, for deflecting solid particles entrained in the air away from the outlet. A relatively particle-free stream of pressurized air stream is diverted into the duct and delivered to an air intake box containing an air filter and carburetor.

Abstract: A cooling air blower for a combustion engine for a two-stroke engine of a hand-held working tool has a cooling air channel for supplying cooling air to a combustion engine and a blower fan for conveying air into the cooling air channel. A combustion air channel branches off the cooling air channel for guiding combustion air to an intake member of the combustion engine. The combustion air channel has a section extending adjacent to the cooling air channel. The combustion air channel has furthermore an air intake socket within that section, the air intake socket being narrower than the cooling air channel and extending transverse, when viewed in a plan view, to a main air flow direction of the cooling air channel into the cooling air channel. The air intake socket is positioned at a slant relative to the main air flow direction and has an inlet opening located on a side of the intake socket facing away from the blower fan.

Abstract: A portable work producing apparatus, such as a chain saw, has an engine cooled by air from a blower driven by the engine. The engine's carburetor is pressurized with clean air from the blower. The blower includes a centrifugal impeller mounted within a fan housing having a set of blades for creating a vacuum to draw air into the housing. The impeller has a second set of relatively low-profile blades underneath the impeller for creating a vacuum under the impeller that draws air in through holes defined through the hub of the impeller. The air drawn through the holes is supplied to the carburetor. A circular screen extends from the axis of the impeller over the holes. Small particles entrained in the air stream entering the housing tend to be carried by the predominant portion of the stream into the housing. The screen is positioned and of a size that the trajectories of more massive particles entering the housing that are not blown into the housing bounce off the screen.

Abstract: An air inlet system of an engine includes a fan having a plurality of vanes in a radial arrangement for blowing air from a center of rotation of the fan towards a radially outward area. A fan case covers the fan and has an airflow supply opening formed in the vicinity of the center of rotation of the fan and an airflow path formed at the outer periphery of the fan to direct an airflow for cooling said engine. A communication path has an air intake formed in the vicinity of the airflow supply opening in the fan case and directs the introduced air to a carburetor of the engine.

Abstract: Fibers comprising 10 to 100% of bicomponent fibers, composed of a core polymer covered by a sheath polymer, are heated to a temperature between the softening point and the melting point of the sheath polymer for 5 seconds to 5 minutes at a pressure of 0 to 2000 psi until the fibers are bonded together. The products are used for drive belts and seals, nib felts for marking pens, filter cloths for plate and frame filters, filtration cartridges, stamp pad ink reservoirs, and battery separators.

Abstract: A vehicle having an engine compartment with an engine and an air cleaner mounted therein is disclosed wherein the cover for the engine compartment comprises two hinge panels with an air inlet formed in each one thereof. An air duct extends from within the vicinity of the air inlets in the hinge panels to an inlet of the air cleaner and includes an air plenum chamber defined in the engine compartment cover. The plenum chamber has an air inlet adjacent the air inlets in the engine compartment cover and an air outlet connectable to the air inlet of the air cleaner.

Abstract: A snowmobile has an upper hood having a plurality of air intakes, an engine provided downstream of the air intakes, and an air box having an air cleaner and communicating with an inlet port of the engine. An electronic control unit is disposed in a case which is secured to an upper wall of the air box. A deflector is disposed between the air intakes and the case so as to deflect intake air from the case.

Abstract: The engine air intake apparatus comprises a planar base plate incorporating a curved duct which lies in the plane of the base member initially and then curves inwardly therethrough. The inwardly curved portion of the duct lies toward a trailing edge of the base plate member and is covered by a cover plate member which seats onto and over the trailing end portion of the base plate member in a parallel plane slightly above the plane of the base plate member. When mounted onto the hood of a vehicle, the leading edge of the base plate member, which is slightly elevated above the level of the hood, provides a leading end splitter plow arrangement to the apparatus for removing hood surface water from the air stream flowing along the hood.

Abstract: Located on an air outlet (3) of an air inlet chamber leading to a mixture former is a star-shaped insert (6), which provides for evening-out of the air flowing out of the air outlet (3) by means of linearly oriented air conducting surfaces (8) arranged in a ray pattern. This results in more uniform mixture formation even at varying engine speeds.

Abstract: Laminated composite structures for use in making fluid filters are disclosed. Such structures comprise (a) a densified high loft layer of powder bonded nonwoven fabric, rebulkable by heating, laminated to (b) a filter media or element that supplies stiffness to the laminate. Also disclosed are methods of making fluid filters, e.g., ones used to filter inlet air for internal combustion engines, from such laminates, and fluid filters containing such laminates in which the nonwoven layer has been rebulked by heating.

Abstract: A dust removing apparatus for an intake air cleaner in which the air cleaner is disposed in the vicinity of a passage of a high speed air flow and an opening in a wall of the air passage confronting high speed air flow within the passage. As a result dust is removed from the high speed air flow.

Abstract: A vehicle having an engine compartment and a hood enclosing the engine compartment and opening forwardly of the vehicle about a horizontal pivot axis located forward of the engine is provided with an air cleaner removably mounted within an enclosed compartment on the under side of the hood and a clean air passage disposed within said hood extends from a first end open to the clean side of said air cleaner to an outlet in said hood adjacent the horizontal pivot axis. A flexible hose connects the clean air passage outlet to the engine air intake to permit opening and closing the hood without breaking the clean air connection. The intake air to the air cleaner is preferably drawn through an air passage in the hood extending from an inlet adjacent the grille to the dirty air side of the air cleaner.

Abstract: An adjustable air cleaner fastening assembly adapted for interconnecting predetermined centers of an air cleaner cover or housing and carburetor on an engine, the centers being eccentric. A base fastening portion engages the predetermined center of the carburetor on the engine. An air cleaner housing or cover fastening portion engages the base fastening portion and the predetermined center of the air cleaner cover for adjustably maintaining a predetermined distance between the predetermined center of the air cleaner cover and the predetermined center of the carburetor.

Abstract: A choke device for an internal combustion engine. A choke plate formed with an opening capable of aligning with a suction port of a venturi of a carburetor is slidably supported for opening and closing the suction port. Legs of a suitable length which rise outwardly from the periphery of the opening, and a blow-back prevention plate provided on the tip of the legs and extending in parallel with the choke plate are provided on the outer surface of the choke plate in such a manner as to form an integral structure therewith.

Abstract: A cartridge air filter for use with an internal combustion engine and method of making the air filter. The air filter comprises a fuel spitback shield having means for collecting spitback fuel from a carburetor and means for substantially containing collected fuel spitback with the collecting means for re-injection into the engine.