US2204128A - Suction nozzle - Google Patents

Description

. L. J. F. ELL

June 11, 1940.

SUCTION NOZZLE Filed June 26, 1956 Patented June 11,1940

UNITED STATES SUCTION NOZZLE Lars Johan Faith Ell,

Stockholm, Sweden, as-

signor to Electrolux Corporation, Dover, Del., a corporation of Delaware Application June 26,

1936, Serial No. 87,390

In Switzerland July 2, 1935 2 Claims.

My invention relates to suction nozzles for use in connection with a vacuum cleaner and particularly to a nozzle which automatically changes the size of the suction opening therein.

Heretofore there have been known so-called duplex nozzles which may be changed at the will of the operator so as to have either a large suction opening and consequently a more widely distributed'fiow of air, or a small suction opening with a concentrated flow of air. The first type of opening is advantageously used in ordinary cleaning, as it permits covering of a relatively large surface to be cleaned Within a short length of time. When objects, such as threads, are encountered which the distributed fiow of air is unable to pick up, the operator shifts the nozzle so as to obtain a concentrated flow of air.

One of the objects of my invention is to provide a nozzle of the above general type, but one in which the size of the opening is automatically altered during each complete stroke of the nozzle. For instance, on the forward stroke of the nozzle a restricted opening is provided while on the return stroke a large opening is provided. The advantage of this is that a large surface can be cleaned in a relatively short length of time, while at the same time a concentrated flow of air is intermittently established without the conscious effort of the operator. This concentrated flow of air picks up articles not entrained by the more distributed flow, whether such articles are seen by said operator or not.

The objects and advantages of my inventionwill be apparent from the following description considered in connection with the accompanying drawing which form part of this specification, and of. which:

Fig. 1 is a cross-sectional view of a preferred embodiment of my invention;

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

Fig. 3 is a view similar to Fig. 2 but showing the parts in a different position; and

Fig. 4 is a bottom view of a portion of the nozzle shown in Figs. 1 and 2.

Referring to the figures, reference character In designates an elongated nozzle body provided with an elongated suction opening II. Rigidly secured to or integral with body In is a hollow nipple l2 adapted to be connected by a conduit iii to a source of suction. Usually conduit I3 is rigid so as to provide a handle for moving the nozzle backwards and forwards over the sur face to be cleaned. Nipple i2 communicates with the interior of body l0 through an opening 14. Pivoted within body ill on a rod 15 is a flap valve member it having a front wall I! longer than the diameter of opening l4, and end walls Ill. The height of flap valve I 4 is such that it projects slightly below the bottom of body l0 so as to contact the surface to be cleaned.

When the nozzle is moved forward over the surface to be cleaned in the direction indicated by the arrow in Fig. 2, valve I4 is pivoted to the rear of nozzle body until end walls 18 contact the rear wall of the body. Consequently, all of the air drawn into the nozzle must pass through the opening 20 defined by the walls of valve it and the rear lip of the nozzle. This results in a concentrated flow of air which is able to pick up articles such as threads which adhere to the surface.

When the nozzle'is moved on the return stroke over the surface in the direction indicated by the arrow in Fig. 3, valve I6 is pivoted to the position shown in this figure and end walls ii are spaced from the rear wall of the nozzle body, whereby communication is established between opening It and the entire extent of elongated 20 suction opening ll, thereby providing a fiow of air distributed along the entire length of the nozzle.

While I have shown and described one more or less specific embodiment of my invention it is to be understood that this has been done for purpose of illustration only, and that the scope of the invention is not to be limited thereby, but is to be determined by the appended claims.

What I claim is: I

1. In a suction nozzle adapted to be moved forwards and backwards over a surface to be cleaned, a hollow body having an elongated suction opening, and a hollow valve member pivotally mounted within said hollow body and having an open end projecting through said suction opening so as to contact said surface and be pivoted by reversal in direction of movement of said nozzle, said valve in one position restricting the effective area of said suction opening to that of the open end of the valve member and in another position rendering the entire area of said suction opening efiective.

2. In a suction nozzle adapted to be moved forwards and backwards over'a surface to be cleaned, a hollow body having an elongated suc-' tion opening, and a hollow valve member pivotally mounted within said hollow body and having an open end terminating in surface contacting position adjacent to the plane of said suction opening and arranged so as to be pivoted by reversal in direction of movement of said nozzle, said valve in one position restricting the effective area of said suction opening to that of the open end of the valve member and in another position rendering the entire. area of said suction opening effective.

LARS JOHAN FAITH ELL.

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