US2203650A - Suction nozzle - Google Patents

Description

June 1940- A. A. FORSBER G 2,203,650

SUCTION NOZZLE Filed Jan. 24, 1938 ZSheets-Sheet 1 ficrL' T a 4 ATTORNEY June 4, 1940. A. A. FORSIBERG SUCTION NOZZLE 7 Filed Jan. 24, 1938 2 Shets-Sheet 2 15 when threads, dog hairs or the like, which adhere of the body which surround the opening I! are ll 25 area of the opening thus resultingin a concenof body It and the interior of member It. 25

'line 1-5 of Fig. 3; r of the nomle body. Furthermore. this distance Patented June 4, 1940 i UNITED STATES QPA-TEN'T OFFICE Axel Albert Forsberg, Stockholm, Sweden, as-

signor to Electrolux Corporation, Dover, Deb, a corporation of Delaware Application January 24, 1938, serial No. 188,544 In Germany January 25, 1937 4 Claims. (01. 15-155) My invention relates to vacuum cleaners and Fig. 7 is a side view of a portion of the device more particularly to an improved suction cleanshown in the preceding figures; and ing nozzle for use in connection therewith. Fig. 8 is an end view Fig. 7.

It is desirable, in order to effect different types Referring more particularly to Fig. 1, referll of cleaning, to have a suction nozzle provided ence character ll designates a vacuum cleaner with at least two different types of suction openunit within the casing of which is located a fan ings, either of which may be employed at will. for producing a suction and a dust bag for re- For instance, when removing ordinary dirt from moving dirt from the air drawninto the cleaner.

- a rug it is advantageous to use an elongated suc- The suction inlet of cleaner II is connected by 10 tion opening having as great an extent as posmeans of a flexible hose or the like II with a 10- sible in order that a maximum area may be rigid hollow handle member it, to the opposite cleaned in a'minimum of time. The length of end of which is connected the suction nozzle it. such opening is of course limited by the degree Nozzle 13 includes a hollow body ll formed of vacuum that is available. On the other hand, with an elongated suction opening IS. The walls strongly to the surface of the rug are encounadapted to slide over the surface being cleaned. tered, it is necessary to produce an intensified A handle connection member I6 is pivotally flow of air in order to remove such objects. Ac mounted on the body member in well known cording to the present invention such intensified manner so that the handle I2 may be pivoted in flow is obtained by closing off a portion of the order that the nozzle may be moved under low 20 nozzle opening. In order to accomplish this a furnitureor the like. The lower end of member pivotal member is provided which may be swung I6 isformed with a cylindrical surface I! in from a position outside of the nozzle opening to order to permit pivoting, and an opening I 8 a position in which it reduces the cross-sectional establishes communication between the interior trated flow of air. Furthermore, this member is A pair of bridge members l9 extend laterally so arranged that it may be shifted from either across. the opening l5 of the body. As will be position to the other by merely lifting the nozzle seenmore particularly from Figs. 3 and 4, bridge from the floor and then replacing it on the floor members I! divide the upper part of the interior 0 again. The nozzle may be moved in this manner of the hollow member into a central and two by means of a rigid handle normally connected end chambers. Pivotally secured to bridge memthereto, and hence it is not necessary for the hers I! by means of pins 20 is a swingabie memoperator to stoop down in order to change the her 2i. The face 22 of member 2| is formed nozzle opening. a with the same, or substantially the same contour Further objects and advantages of my invenas the face 23 of the rear portion of the nozzle 35 tion will beapparent from the following descripbody which forms the rear lip of the nozzle opention considered in connection with the accoming. This rear lip is interrupted, as is indicated panying drawings which form part oi this speciat 24, in Fig. 3, and member 2| is adapted to be fication and of whichswung into this space, and when in position there- Fig. 1 is a view showing avacuum cleaner unit in the member 2| forms a continuation of the 40 to which is connected a nozzle in accordance with portions of the rear lip which are disposed on the present invention: either side of it. 'Ihe face 25 of member It is Fig. 2 is a bottom view on a larger scale than preferably formed with a plurality of projections i that of Fig. 1, showing the improved nozzle with 28. when swung to the position shown in Figs.

the movable member in one position; 3 and 5, the ends of the member 2| contact the 45 Fig. 3 is a view similar to Fig. 2, but with the bridge members is in a manner such as 'tosubmovable member in another position; stantially prevent flow of air therebetween. The Fig. 4 is a cross-sectional view taken along the dimension of member it from its free end to the line 4-! of Fig. 2; pivot-2| is such that a space 21 is left between Fig. 5 is a cross-sectional view taken on the the free end of the member-and the forward lip. 50

Fig. 6 is a cross-sectional view taken on the is greater thanthe vertical distance from the surline t-i of Fig. 2. but-with the movable member face on which thencule is used to the pivot II.

. in a position intermediate to the position shown Preferably, the thickness of member, includ- 5c in Figatand 5; lag the projections It, is such that, when the u forward lip of the nozzle is lifted slightly off the surface to be cleaned.

The operation of the above described device is as follows:

With the member 2| in the position shown in Figs. 2 and 4, this member in effect forms a portion of the rear lip of the nozzle and is entirely removed from the suction opening l5. Under these conditions air may enter the nozzle through the entire length of the suction opening and the nozzle, when it is reciprocated back and forth over a surface, is able to clean a strip of the surface as wide as the opening I5 is long. However, if it is desired to have a more concentrated suction for the purpose of removing threads or the like which adhere strongly to the surface, the nozzle-body is lifted by means of the handle l2 far enough so that the member 2|, due to its .weight, can swing in a clockwise direction about the pivot 20. The inertia of member 2| carries it past a vertical position, and if the nozzle is again placed on the floor at this time it will force &

the member 2| to continue to pivot in a clockwise direction to the position shown in Fig. 5. Under these conditions, the member 2| being in contact with the bridge member l9 completely blocks off the two ends of the suction opening I 5 and materially reduces the cross-sectional area of the center portion of the opening, leaving only a narrow slot 21 for the inflowing air. This results in a very concentrated suction at this place, which is able to remove objects which tenaciously adhere to the surface. The space between the projections 26 in member 2| provides a channel for the air to enter the slot 21, through which channel the air travels a high velocity, thus aiding in removing the threads or the like. Inasmuch as the forward lip of the nozzle is held slightly above the surface, air is also able to enter the slot 21 through the space. In order to return the member 2| to its original position, it is only necessary to lift the nozzle from the surface, whereupon the weight of the nozzle causes it to pivot in a counterclockwise direction and when the nozzle is placed on the surface after the member 2| has passed a vertical position, the member will be forced further in a counterclockwise direction to its position shown in Fig. 4.

In order that the suction effect will not retain member 2| in the position shown in Figs. 3 and 5 even if the nozzle is lifted from the floor, it may be desirable to provide spring means for initiating movement of the'member in a counterclockwise direction. Such springs are designated by reference characters 30 and comprise pieces of resilient wire having ends 3| engaging recesses formed in member 2 I, portions 32 encircling pivots 20' and ends 33 bearing against bridge members Ill. The strength of springs 30 should preferably be so chosen that they will counteract the effect of suction on the member 2|, thus causing the member to pivot in a counterclockwise direction in substantially the same manner as it pivots in a clockwise direction.

While I have shown'one more or less specific embodiment of my invention it is to be understood that this has been done for purposes of illustration only and that the scope of my invention is not to be limited thereby, but only bythe appended claims when viewed in the light of the prior art.

I claim:

member is in the position shown in Fig. 5, that is, in contact with the bridge members 19, the

1.. In a suction nozzle, a hollow body having lips adapted to contact the surface being cleaned and defining a suction opening, and a member pivotally connected to said body and having a contour substantially the same as that of one of said lips, said member being s'wingable from a position in which it forms a portion of said one of said lips and is in contact with said surface to a position reducing the cross-sectional area of said opening, the distance from the free end of said member to the pivotal connection being substantially greater than the distance from said pivotal connection to the plane of said opening, whereby said member is prevented from pivoting when said opening is in contact with said surface.

2. In a suction nozzle, a hollow body having lips adapted to contact a surface being cleaned and defining a suction opening, one of said lips being interrupted for a substantial distance, and

a member pivotally connected to said body and having a length substantially equal to that of said interruption, said member having a contour substantially the same as that of said interrupted lip and being swingable from a position in which it occupies the space provided by said interruption to form a portion of saidinterrupted lip and is in contact with said surface to a position reducing the cross-sectional area of said opening, the distance from the free end of said member to the pivoted connection being substantially greater than the distance from said pivoted connection to the plane of said opening, whereby said member is prevented from pivoting when said opening is applied to said surface.

3. In a suction nozzle, a hollow body formed with an elongated suction opening, spaced bridge members extending transversely of said opening, and a member pivotally connected to said body and swingable from a position outside said body to a position in contact with said bridge members, the distance from the free end of said memher to the pivotal connection being substantially greater than the distance from said pivotal connection to the plane of said opening, whereby said member is prevented from pivoting when said opening is in contact with a surface to be cleaned,

the pivoted member having a length at least as great as the distance between said bridge members and a width less than the width of said opening, whereby the pivoted member when in the second-named position serves to block flow past said bridge members from the end portions of said opening and to reduce the cross-sectional area of the portion of said opening disposed between said bridge members.

4. In a suction nozzle, a hollow body formed with an elongated suction opening, spaced bridge members extending transversely of said opening, and an element having a length substantially equal to the distance between said bridge members, and a width less than the width of said opening said element being pivotally connected to said body and swingable from a position outside said body to a position in contact with said bridge members, the pivoted member when in the second-named position serving to reduce the area of the portion of said opening between said bridge member and to block off flow past said bridge members from the end positions of said opening, and the thickness of said pivoted member being such as to slightly space said body from a surface being cleaned.

AXEL ALBERT FORSBERG.

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