US2237726A - Suction nozzle - Google Patents

Description

1? Apr. 8, 1941 graze 2,237,726 soc'rronnozzrs George Horace Cranmer, Philadelphia, Pa, as-

signer to Elect'rolux Corporation,

New York,

N. Y., a corporation of Delaware Application January ca, 1939, Serial No. 252,213

8 Claims.

ll/lv invention relates to suction nozzles and more particularly to suction nozzles for cleaning rugs.

in cleaning rugs there are different conditions to he met depending upon the type of rug to be cleaned and also the type of dirt to be removed hr a suction nozzle.

Dirt embedded in the pile of a rug is most conveniently removed by a suction nozzle having smooth lips and producing a flow of a large volume of air through the rug pile. In removing surface dirt including hairs, threads, and the hire, it is desirable to produce a high velocity of air iiow along the rug surface. An agitator for separating or loosening hairs, threads, etc. tenaciouslv adhering to the surface of the rug is desirable especially in the case of high pile rugs, such as Oriental rugs.

an object of my invention is to provide an improved suction nozzle with an agitator for uuiclrlv and efilclently removing surface dirt.

other object of my invention is to provide a suction nozzle with a two position agitator with difierent surfaces for cleaning different types of rugs.

at l consider to be novel and my invention may he better understood by reference to the following specification and appended claims when considered in connection with the accompanning drawing, in which Fig. l is a top plan view of my improved suction nozzle;

Fig. 2 is a side elevation partly in section;

Fig. 3 is an enlarged detail view of the agitator;

Fig. d is an enlarged cross-sectional view taken along the line i-t of Fig. 2 with the nozzle in reversed position and engaging a rug; and

Fig. 5 is a top plan view showing the agitator in an alternate position.

Referring to the drawing it indicates a suction nozzle hotly having a top surface it and a bottom surface it. The bottom surface it is provided with an elongated suction opening it surrounded hp smooth lips it. Suction opening it is used for the general cleaning of rugs and ior removing dirt embedded in the rug pile. The smooth lips l t seal against a rug surface and so cause air to pass through the rug pile. l or removing surface dirt, hairs, threads, and the hire, the top surface it is provided with a rod it having a central passage it. Passage it communicates with the interior oi the body it and provides a suction opening smaller than the suction opening it and suhicientlv, small to pro duce a high velocity flow of air when connected dill hill

to a vacuum cleaner. Rod i5 is provided with spaced lugs il located at each side of the passage ii. Lugs I! may be formed by milling the rod 15 at right angles to the passage It. The height of the lugs I1 is greatest adjacent the passage ii forming a sharp edge at the passage It. Spaced lugs i8 arelprovided on the reverse side of rod i5 adjacent each side of the hassage ii. The lugs ifliare longer, wider, and spaced farther apart than the lugs ii. The spaces between lugsu-il are curved producing smooth side edges on the lugs It for a purpose that will be pointed out below.

The formation andIIocation of the lugs ii and il are not covered by this application but are the subject of another application filed concurrently herewith.

The ends of the rod enter recesses it in top part Ii as shown at the left in Fig. 2. Top ill and rod I! are secured to bottom it by a plurality of screws 22. A finger grip 23 is connected to rod ii for rotating it' from one position presenting lugs i! to a second position presenting legs I! and vice versar To hold the red I! in either of its two positions the sides of the rod forming the passage II. are bowed out as shown in Fig. 3 though somewhat exaggerated therein. The bowed out sides at the rod it increase the eifective width of the rod transverse to the passage II. when the rod I8 is in either of its selected positions the sides or the rod frictionally engage the sidewalls 24 of the opening 25 or top it in which thercd it is located. The side walls 2d are so spaced as to straighten the sides of rod it when it is in one oi its operating positions, as shown in Figs. l and 5. he the rod I5 is rotated hr itsflnger grip it from one position to another the frictional engagement between the rod it and side walls it decreases to a minim en the passage it is perpendicular to the side walls it and then increases to a maximum when the rod it reaches its second position. This lrictional engagement is sumcient when the rod iii is in one oi its selected positions to hold the rod against accidental rotation by engagement with a surface being cleaned. ddiacent the entremlties oi rod it, two gliding surfaces it entcndnutwarv irom the top suriace ill and serve the dual innctions 9i iacilitat ing the movement oi the noazle along a rug sur lace and locating either the lugs ill or the lugs it at the suriace oi the rug. ll pivoted elhow it communicates with the interior oi the hodv it and man he cocctcd to a men cleaner, not shown, through the intermedia'rvoi a cue tion conduit. When elbow 21 and body 40 are in the relative positions shown in Fig. 2, the suction produced by a vacuum cleaner is communicated to the suction opening i3. By rotating the body In about the elbow 21 through an angle of 180 degrees communication is established with the passage Hi.

When the nozzle body I is to be used for cleaning a rug it is connected to a vacuum cleaner as by means of the connection of a suction conduit to elbow 21. The embedded dirt is removed from the rug by traversing it with the bottom II in contact with the rug surface. When it is desired to remove surface dirt, hairs, threads, and the like, the nozzle body is rotated on the elbow 21 to a position with the top-surface II in contact with the rug. With the rod ii in the position shown in Figs. 1 to 3, the lugs l1 engage the rug surface. The end extensions 26 serve to position the lugs II at the surface of the rug pile. Air entering the passage l6 travels along the surface of the pile and due to the relatively small cross-sectional area of the passage l6 attains a high velocity. As the nozzle is moved across a rug the high velocity air flow will carry the surface dirt including the loose hairs, threads, etc. into the passage l6. Hairs, threads, or the like which are adhering tenaciously to the surface of the rug pile are loosened by the lugs H. The forward edges of the lugs I1 adjacent the rear of the passage l6, determined by the direction of movement of the nozzle, serve to loosen the threads and the like. The lugs I! on the opposite side of the passage [6 serve to guard the sharp edges of the other lugs l1 and prevent them from becoming deeply embedded in the rug pile. Regardless of the direction of movement of the nozzle one set of lugs -I'| serve to loosen the threads and the other set on the opposite side of passage l6 serve as guards for the first set. The spaces between the lugs l1 permit a flow of air right at the surface of the pile from both sides into the passage IS. The passage l6 being of uniform cross-section throughout its extent the velocity of the air is maintained in its passage therethrough and there is no tendency for dirt picked up by high velocity air being precipitated again due to a reduction in the velocity as the air enters the nozzle.. An important advantage obtained from the location of the lugs I! on each side of the central passage I 6 is the equal facility with which surface dirt may be v removed upon movement of the nozzle, in a forward or reverse direction.

In cleaning hooked rugs which have looped threads at the surface instead of the free ends of a pile, as do other rugs, there is a. possibility that the lugs l1 may catch in the surface threads. The lugs l8 are wider and do not have the sharp side edges of the lugs l1 due to the curved surfaces between the lugs l8. The lugs l8 will not catch in looped surface threads and so may be used for cleaning hooked rugs. The lugs I8 perform the same function as the lugs l1 and if desired may be used for the surface cleaning of other rugs especially low pile rugs.

What I claim is:

1. 'A suction nozzle comprising a body having an elongated opening, a rod secured to said body within said opening having a central diametric passage with a plurality of radially spaced openings forming a suction opening and communicating with the interior of the body, means to rotate said rod to selectively present one of said openings in cleaning position, and means engaging opposite sides of said rod to frictionally hold said rod in a selected cleaning position.

2. A suction nozzle comprising a body having an elongated opening, a rod secured to said body within said opening having a. central diametric passage with a plurality of radially spaced openings forming a, suction opening and communicating with the interior of the body, means to rotate said rod to selectively present one of said openings in cleaning position, said rod being bowed out transversely to the passage through said rod, and abutment means engaging opposite sides of said rod to frictionally hold the rod in a selected cleaning position.

A suction nozzle comprising a body having an elongated opening, a rod secured to said body within said opening having a central diametric passage with a plurality of radially spaced openings forming a suction opening and communicating with the interior of the body, means for rotating said rod to selectively present one of said openings in cleaning position, said rod normally having a greater diameter in a plane perpendicular to the passage through said rod, and abutment means engaging opposite sides of said rod to frictionally hold the rod in one or the other of the cleaning positions.

4. A suction nozzle comprising a body having an elongated opening, a rod secured to said body within said opening having a central diametric passage with a plurality of radially spaced openings forming a suction opening and communicating with the interior of the body, a finger grip connected to said rod and adapted to move the rod .to selectively present one of said openings in cleaning position, said rod being preformed with a greater diameter perpendicular to the passage through said rod, and walls formed in said body in each side of said rod engaging said rod to frictionally hold the rod in either of the cleaning positions 5. A suction nozzle comprising a body having an elongated opening, a rod secured to said body within said opening having a central diametric passage with a plurality of radially spaced openings forming a suction opening and communicating with the interior of the body, means to rotate" said rod to selectively present one of said openings in cleaning position, said rod tending to expand outwardly in a direction transverse to said passage, and walls formed in said body at each side of said rod engaging said rod to overcome the tendency of the rod to expand, whereby a frictional engagement is produced between said rod and said body opposing rotation [of said rod from one or another cleaning posiion.

6. A suction nozzle including a bottom part, a top part with recesses adjacent the ends of a central elongated opening, said recesses opening inwardly toward said central opening and toward said bottom part, a rod secured within the opening of said top having a. central passage forming a suction opening with ends extending into the recesses in said top and abutting said said bottom part, and means securing said top and bottom part together whereby said rod is locked in position.

'7. A suction nozzle including an hollow bottom part having a side opening. a top part having a central opening, and end recesses opening inwardly toward said central opening and toward said bottom part, a rod having a central diametric passage communicating with the interior of said bottom part and extending into said end we cessesi oi seici top part and abutting the bottom part, a, tubular member extending through the* sine opening of said bottom part, and means to secure said top part to said bottom part.

B. A suction nozzle including a bottom part having a, side opening, a top part having a, centrail opening and end recesses opening inwardly toward said. central opening and toward; said b t-tom part, a rod located within the central 10 nne'men opening oi nniei ton nnit with its ends extending into sniii ensen nnn abutting min bottom part, snid i'oii inn/inn n nenti'nl iiinmeti'in tines-nee forming [EL suction openinn eommnnie'nting with the interior oisnin bottom pni't, nn eihow extending through the side nneninn oi sniti iiottom part, and screws eiitenninn thinnnh mid bottom part anti in tin'eniien ennenient with said top part,

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