Патент USA US2122179код для вставки
June 28, 1938. w. LEATHERS 2,122,179 AGITATORITOP ‘FOR VACUUM CLEANER FILTERS ' Filed July 51, 1957 ATTORNEY. 2,122,179 Patented June 28, 1938 UNITED STATES PATENT OFFiCE 2,152,179 AGITATOR TOP FOR VACUUM CLEANER FILTERS Ward Leathers, Haworth, N. J., assignor to Quadrex Corporation, New York, N. Y., a cor poration of Delaware Application July 31, 1937, Serial No. 156,696 2 Claims. (Cl. 183—-59) The principal object of my invention is ‘to pro vide means whereby stoppage of dirt may be avoided or removed at the U-turn in the top of a vacuum cleaner ?lter. My device applies more 5. particularly to that type of cleaner which has a ?lter co-axial with an operator's handle, and wherein the dirt-laden air is carried upward to the top of the ?lter, directed through a U-turn'at that point and then directed downward through the?lter toward the dirt-receptacle. My invention consists primarily of a spring-re sisted plunger. It is disposed in the top of the ?lter and passes through, and is manually oper able through, a transparent domelike ?lter top. Its purpose is to indicate to the operator when any stoppage of dirt or rubbish occurs in the top of the ?lter (at the U-turn) , and to enable the op erator, without opening the ?lter-top, to dis engage it instantly and manually. In order to set forth my invention so all those familiar with these arts may understand, I have prepared the following speci?cation and appended drawing, of which:— Figure I is a diagrammatic side view of my push-broom type vacuum cleaner. Figure II is a partially cross-sectioned eleva tion of the ?lter-top and plunger mechanism. Figure III is the same showing a modi?cation. A motor-blower-unit (Figure I) has joined to 30 its bottom end a removable nozzle 2, to its top is joined an up-draught air tube 3 held between the motor-blower-unit and supporting member 4. A ?lter 5 surrounding an operator’s handle 6 is also joined to the supporting member 4. An in ner ?lter duct 1 directs the dirt-laden air to the top of the ?lter where, after making a U-turn, it passes downward through the ?lter toward a dirt-receptacle 6. The ?lter communicates at its lower end through the supporting member 4 with the dirt-receptacle 8 which is held to the under side of the supporting member by means of a latch 9. At the upper end of the operator’s han dle is a handle-grip In, a current supply cord II, and a hang-up ring 12. A dome of transparent material 13 (Figure II) is joined to the top of the ?lter 5 in any suit able manner, but preferably by a manually re leasable latch [4. The ?lter, as shown made of fabric, is held as by riveting between an annular outer ring [5 and an annular inner ring 16. Be tween these two rings is disposed a compressible gasket or packing ring I‘! made of rubber, sponge rubber, felt, or other compressible material. An up-draught inner dirt duct 1 is made by sewing a 55 piece of fabric on both edges (as at 18) to the inner wall of the ?lter. The upper end of this fabric piece is provided with a welt 20 for the pur pose of holding the central portion high enough to carry the up-draught dirt-laden air into the dome l3 where it is obliged to make a U-turn on the inner face of the dome i3. A pin 21 passing through the handle 6 supports a washer 22, which supports the lower end of a spring 23 surround ing the handle. The spring impinges between the washer 22 and the turned-in top- of a solid cylin 10 drical sleeve 25, which surrounds both spring and handle. An annular moulded rubber piece 25 on the top of the cylindrical sleeve serves as a con venient manual handle-grip. Joined to the bot tom of the sleeve 25, as by a screw thread, is an annular part 21 having a projecting shoulder which is held, by means of the spring 23, against the under side of a Washer 30. This washer may be of rubber or felt or other yieldable material. It ?ts snugly within a recess in the transparent 20 dome I3. A further soft washer 3| of‘ felt or other yieldable material ?ts next the handle and is held within the annular part 21. The pur pose of the washer or gaskets I1, 30, and 31, is to avoid the leakage of dirt-laden air and hence 25 the dissemination of dust. The cylindrical sleeve 25 together with its spring 23, and its bottom member 21, comprises a plunger which is free to move longitudinally with the handle. The up ward thrust of the spring in this plunger mech 30 anism pulls upward on the dome l3 and hence on the fabric ?lter 5 holding the latter ?rmly taut and cylindrical. When the machine is in opera tion and there is air pressure inside the ?lter, the ?lter 5 and the dome l3 holds ?rmly in, place Without the upward effort of the spring 23. Un der these conditions the plunger mechanism, by means of the handle-grip 26, may be pushed downward freely, the cylindrical part 25 sliding through the washer or gasket. 30. When the 40 plunger is so depressed it contacts and distorts the welt 20 in the top of the inner dirt duct 1 and as it passes upward and downward through the dome l3 and so disturbs the welt it disengages any cleavage or accumulation of dirt or rug nap 45 which may occur, and the stream of air blows it immediately into the larger portion of the ?lter where the dirt-laden air passes downward toward the dirt-receptacle 8. In use it is highly desirable that some‘ means 50 of avoiding dirt cleavage at the U-turn be pro vided. The transparent top 93 lying as it does directly in the operator’s line of vision gives im mediate evidence of any such stoppage and the plunger ‘mechanism without the leakage of dirt 55 2 2,122,179 or dust can be used for instantly dislodging such troublesome material. The foregoing description pertains to a ?lter, ?lterqtop, and operator’s handle wherein the operator’s handle passes through the ?lter-top cap l3. The plunger rod passes through the cap I3 and has joined to it at its inner end a suitable disc or face which may be annular or otherwise and continues downward through the ?lter to a shaped, may be recessed into the cap 13 in order to keep a perfectly smooth interior for air ?ow purposes, and may also be provided, if desired, point of attachment at the bottom of the ?lter for with small milled teeth or projections on its furnishing the main longitudinal structural sup port of the machine. I have found it very de outer rim so that turning the button 43 will help to dislodge any rubbish that may accumulate _> about the top of the inner ?lter duct 1. Such 10 10 sirable in some cases to omit that portion of the handle which passes through the ?lter, see Fig‘ - modi?cation of the mechanism of Figure 11 is ure III. In this case, the ?lter-top I3- is joined in any suitable manner as by screws or manually releasable latches (as at I4 in Figure II) to an necessary where the operator’s handle 6 does not pass through the ?lter, or in other words, is not used for structural support of the machine in the outer solid ?lter casing 40. This cylindrical case is made of any thin, light, stiff, non-dentable ma‘ ?lter zone. terial such as hard ?bre. 1. In a vacuum-cleaner, a motor-suction-unit, an operator’s handle surrounded by a ?lter, a The outer case 40 is joined at its bottom in a rigid manner to‘ the ' 15 I claim: supporting member 4, which in turn is joined. in v dome-likecap on said ?lter, a spring-resisted 20 a substantial and rigid manner to the up-draught' 'plunger surrounding the handle and passing 20 air tube 3, which is also joined in a rigid struc tural manner to the motor-suction-unit I. When the operator’s handle 6 is joined to the ?lter cap 13 in rigid manner, as, for instance, by rivets or screws, the vacuum cleaner becomes a rigid struc ture from the handle-grip ID to the motor-suc tion-unit I without the operator’s handle 6 pass ing through the ?lter. The ?lter 5 is joined at its top to the outer casing 40 by means of an in 30 ternal ring 4| which also provides a seat or an chorage for the ?lter cap I 3. It is self-evident that in this structure the agitator plunger can not surround the handle 6 and is, therefore, pro; vided on the side thereof. It may be devisedin 35 many forms but I have shown it somewhat di agrammatically as a plunger rod 42 with a top push-button 43 and an upward-lifting spring 44 impinging between the push-button. 43 and the through said cap for disengaging dirt or rubbish that sticks in the top of the ?lter. . 2. In a vacuum-cleaner, a motor-suction-unit, an operator’s handle surrounded by a ?lter, a solid domelike top on said ?lter, and a plunger sur 25 rounding said handle and passing through the said top for disengaging dirt or rubbish that sticks in the top of said ?lter. 3. In a vacuum-cleaner, a motor-suction unit, a ?lter having an internal duct for leading dirt 30 laden air to a point near the top of said ?lter, a dome-like cap on said ?lter, and a manually operable plunger surrounding an operator’s han die with both handle and plunger passing through the top on said ?lter for dislodging dirt or rubbish 35 that sticks in the top of said ?lter. WARD LEATHERS.