US2200769A - Suction nozzle - Google Patents

Description

May 14, 1940.

e. E. BJORKMAN 2,200,769

SUCTION NOZZLE Filed March a, 1936 INVENTOR, m M BY 4,; ATTORNEY.

" Patented May 14, 1940 UNITED STATES SUCTION NOZZLE Gustaf Erik Bjiirkman, Saltsjo-Nacka, Sweden, assignor to Electrolux Corporation, Dover, Del., a corporation of Delaware Application March 3',

In Germany 3 Claims.

My invention relates to suction nozzles for use in connection with vacuum cleaners, and more particularly to a suction nozzle which is adapted for removing dirt from corners and other more 5 or less inaccessible locations.

The manner in which I attain this object, as well as further objects and advantages of my invention, will be apparent from the following description considered in connection with the accompanying drawing which forms a part of the specification and of which:

Fig. 1 is a front view, partially in cross-section, of a nozzle embodying my invention;

Fig. 2 is a cross-sectional view taken on the line 2-2 of Fig. 1; and

Fig. 3 is a bottom view of the nozzle shown in Figs. 1 and 2.

Referring more particularly to Figs. 1 through 3, reference character l designates a suction nozzle including parallel elongated front and rear walls II and I 2, respectively. These walls are joined at their ends by means of end walls l3. Walls ll, l2, and I3 define an elongated hollow body to which is connected a tubular 2.3 member 14 adapted to receive a'conduit leading to a source of suction, such as a vacuum cleaner unit. Member I 4, as shown, extends obliquely from the rear of the nozzle 10.

The lower edges of walls H and I2 constitute nozzle lips bounding a lower elongated opening into the hollow body. This opening is partially closed by means of a plate l5 which extends the entire length of the opening between end walls l3 and extends from the rear wall l2 to closely .3 adjacent the front wall I I, leaving a narrow elongated suction opening l6 immediately adjacent to the forward wall ll. Plate l5 may be secured in place by any suitable means, such as screws I! which have threaded engagement with the nozzle body. It will be noted that the lip formed by forward wall II is slightly lower than the lip formed by rear wall l2. Plate I5 is preferably formed with an offset as is shown at ill, in order that its opposite sides may be at substantially the same level as the respective lips, Also, the

forward edge of plate l5 bounding the opening it is preferably formed as a portion of an are,

as is shown in Fig. 3 in order that the opening l6 may be wider-at its central part than at its 50 ends. This is desirable in'order to equalize the suction along the length of the suction opening l6, inasmuch as it would normally be greater at the center .due to its proximity to the tubular member M which is connected to the source of suction.

1936, Serial No. 66,834 March 5, 1935 End walls I 3 have portions l9 depending below the lips of both walls II and I2. The lower faces 20 of portions I9, which are adapted to contact the surface undergoing cleaning, are rounded as is clearly shown in Fig. 2. As shown, the ends of portions I9 adjacent to forward wall II have a larger radius of curvature than the other ends of portions IS. The suction opening I6 is located off-center with respect to the centers of curvature of faces 20, whereby rocking the nozzle on these faces 20 causes suction opening l6 to be brought closer to or removed farther from the surface undergoing cleaning.

The operation of the above described device will be largely apparent from the above description. When tubular member I4 is connected to a source of suction, air is drawn in through suction opening l6 and, if the tool is passed over a dusty surface, dust is entrained with this air. Due to the fact that the suction opening I6 is located immediately adjacent to the forward wall II and entirely to one side of the center line of the nozzle, the suction will be strongly concentrated adjacent to forward wall I I. Consequently, if the nozzle is placed against, for instance, a baseboard, the suction will be strongly concentrated at the corner formed by the floor and the baseboard. With an ordinary type of nozzle, no such concentration of suction takes place with the result that much of the dirt deposited in the corner is not removed.

By rocking the nozzle on the curved faces 20. the proximity of the suction opening I6 to the surface undergoing cleaning may be varied and hence, the degree of suction applied to the surface may be varied. For instance, if it is desired to remove small heavy objects, such as grains of sand, this may best be done by rocking the nozzle so that the opening I 6 is very close to the surface. On the other hand, larger but lighter objects may be picked up by the nozzle with the opening l6 spaced a greater distance from the surface.

While I have shown and described a more or less specific embodiment of my invention, it is to be understood that this has'been done for purposes of illustration only and the scope thereof is to be limited only by the appended claims viewed in the light of the prior art.

What I claim is:

1. In a suction nozzle for cleaning'a surface, means including a pair of longitudinally extending side walls and a pair of transversely extending end walls defining an elongated hollow nozzle body, and means for connecting said hollow body to a' source of suction, said hollow body being formed with an elongated suetion opening disposed between said end walls, said end walls having rounded bottom surface contacting portions depending below said side walls, saidsuction opening being off-center with respect to said rounded portions whereby the distance between said suction opening and the surface is variable by rocking said nozzle on said rounded portions.

2. In a suction nozzle for cleaning a surface, means including a pair of longitudinally extending side walls and a pair of transversely extending end walls defining an elongated hollow noz-' said suction opening and the surface is variable y by rocking said nozzle on said rounded faces.

3. In a suction nozzle, a hollow body including longitudinally extending straight forward and rear walls and transversely extending end walls, the lower edge of the forward wall being narrow and constituting a straight forward lip of the nozzle, and an imperforate plate member extending from the rear wall to adjacent to the forward wall to define at the front portion of said nozzle a narrow elongated suction opening bounded on one side by said'narrow lip and on the other by the edge of said plate member, said end wallsbeing convex downwardly and having their lowest portions spaced rearwardly of said opening, said end walls projecting below said plate member and-said forward and rear walls to provide supporting rocker surfaces extending at right angles to the narrow suction opening to normally maintain both said forward lip and said plate member spaced above the surface being cleaned.

GUS'I'AE ERIK BJGRKMAN.

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