US2235674A - Suction nozzle - Google Patents

Description

March 18, 1941. A FORSBERIG 2,235,674

SUCTION NOZZLE Filed Nov. 18, 1958 2 Sheets-Sheet l vv qww-v I WWfiJNVENTOR.

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March 18, 1941. FQRSBERG 2,235,674

SUCTION NOZZLE Filed Nov. 18, 1938 2 Sheets-Sheet 2 W v Vi INX/E TOR. BY

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ntenldl W, 1941 STATS Application November it, was, Serial No. 24ll,2ll'l in Germany November 119, 11937 3 iZlaims. (ill. 15-4155) My invention relates to vacuum cleanersa nd more particularly to an improved suction nozzle.

In accordance with the present invention a nozzle is provided. having an elongated suction opening adapted for use in removing ordinary dust and dirt from a rug, or other surfaces to be cleaned, and which is provided with a pivoted member which may be swung into a position for reducing the effective cross-sectional area of the nozzle opening. This serves to concentrate the air flow at a comparatively small area, thus making the nozzle effective ior removing threads, dog or cat hairs, or other smaller objects which adhere tenaciously to the surfaces being cleaned.

In order to reduce the effective cross-sectional area of the nozzle the pivotal member is arranged to be swung into such a position that it blocks a considerable proportion of the area of the nozzle opening. When in this position the'effect of the suction is to retain it, thus reducing the ease with which it may be returned to its originalposition when it is desired to make use of the full cross-section of the nozzle. opening.

in accordance with the present invention, means are provided whereby the strongsuction which tends to hold the pivoted member in a position reducing the cross-sectional area-of the nozzle opening is broken by merely lifting the nozzle 'from the surfaces being cleaned, thereby permitting thefimember. to be returned toits inoperative-position.

-lFurtherobjects and advantages of my inven- --tion will be :apparentf-rom the following description; considered in connection with the :accompanying drawings which form part of this specification and of which;

Fig. Us a bottom'view of a nozzle in accordance with the present 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. 1, but with certain parts in a different position;

Fig. 4 is a cross-sectional view taken on the line L4 of Fig. 3;

Fig. 5 is a bottom view of a portion of a nozzle in accordance with a second embodiment of my invention;

Fig. 6 is a cross-sectional view taken on the line 6-5 of Fig. 5; and

Fig. 7 is a cross-sectional view taken on the line 1-1 of Fig. 5.

Referring more particularly to Figs. 1 through 4, reference character I!) designates a nozzle body which is formed with an elongated suction opening M. Thi opening is bounded in part by forward lips Ill and it and rear. lips All and it, the ends of lips it and it and lips ill and it being joined together at the ends of the nozzle.

Rotatably secured. to the nozzle. body ill is a hollow cylindrical-member it formed with an opening Illwhich establishes communication between the interior of thebody it and the interior of the member it. Secured to'the member lb and communicating therewith is aconnecting member l8, the opposite end of which is adapted 10 to receive a conduit leading to a source of suction. i i

When the nozzle is. placed with the lips on a surface to be cleaned, the space between the forward lips l2 and i3 provides a narrow slot l9. Between the lips l2 and it and between the lips l3 and I the depth of the interior of the nozzle body is indicated by the distance a, while opposite the slot E9, the depth of the interior of the nozzle body is limited only by the member 06.. Between the rear lips l4 and I 5 there is pivotally mounted a member 2|]. This member is formed with a lip 2! which, when the member is in the position shown in Figs. 1 and 2, forms a continuation of the rear lips M and 15. Member is formed with a central opening-22 and this opening, on the opposite side of the member from the lip 2|, is completely bounded by a lip 23.

The lateral dimension of the member 20 is such that, when it is swung to the position shown in Figs. 3 and 4, a narrow passageway 24 is formed between the edge Of mGmbBI' 20 and the inner wall of the nozzle body 10, this passageway communicating with the'aforesaid slot. l9. 2 Member 20 issIightly longer. than the deep central por-.- tion of the nozzle and consequently, when the member 2.0 is in the position shown in Figs. 3 and 4, it blocks ,off flow to the central portion from the shallow end portions. The extent of lip 23 is such that, when the member 2fl'is'in the position as shown in Figs. 3 and 4, this lip raises the forward lips I? and i3 of the nozzle slightly away from the surface. Thus, it is assured that the lip 23 is held against the surface being cleaned and tends to prevent the fiow of air into the nozzle through the opening 22, thus causing substantially all of the air to flow through the narrow passage 24.

. However, when the nozzle is lifted bodily from the surface, air may flow into the nozzle body through the openin 22, and this opening is large enough so that the flow of air therethrough is sufficient to break the suction which would otherwise tend to hold the member 20 within the opening I I. Due to the location of the pivots upon which the member 20 is mounted, when the nozzle is raised from the floor and the suction broken as aforesaid, the member 20 swings in the direction of the arrow shown in Fig. 4 to a position somewhat beyond the vertical. If the nozzle is then lowered towards the floor before the member 20 has a chance to swing back, the

member 20 is caused to take the position shown in Figs. 1 and 2. In order to pivot the member 10 20 from this position to the position shown in Figs. 3 and 4, the nozzle is again raised from the floor, whereupon gravity causes the member to pivot as indicated by the arrow in Fig. 2.

In th embodiment shown in Figs. through '7,

15 similar parts are designated by the same reference characters as in Figs. 1 through 4. This embodiment differs from that above described in that the pivoted member, here designated by reference character 25 does not itself completely form the opening 22, but this opening is in pant bounded by a lip 16 which is part of the nozzle body .ID. The member is pivoted to opposite ends of the lip 26 by means of pins 21. The downward extension of lip 26 is such that it con- 2} facts the surface being cleaned and hence prevents .the flow of air through the opening 2| when the nozzle is against such surface. The lip 28, which surrounds that portion of the opening 22 which is bounded by the member 25 also contacts 30 the surface being cleaned when the member 25 is in the position shown, thus musing substantially all of the air to pass through the passage 24. The operation of this embodiment is similar to that described above in connection with the 35 embodiment shown in Figs. 1 through 4 and hence need not be repeated.

While I have shown two more or less specific embodiments of my invention, it is to be understood that this has been done for purposes of 40 illustrations only and that my invention is not.

limited thereto but the scope thereof is to be determined by the appended claims.

I claim: 1. In a suction nozzle for cleaning a surface, 45 a hollow body formed with a cleaning opening bounded by lips, and a member movable with relation to said body from a position outside said opening to a position reducing the effective crosssectional area of said opening, the dimensions 60 of said member being such with respect to those of said opening that when the member is in the second-mentioned position there is provided a small opening between said member and one of said lips, the portion of said lip adjacent to said small opening being cut away to provide a passage for flow of air over said sinface and into said small opening, said member having a passage forming an auxiliary air inlet to said hollow body whensaid member is in the second-mentioned position and spaced from said surface, the material bounding said auxiliary inlet on the side thereof which is adjacent to said surface when the member is in said second-mentioned position 5 extending downwardly to contact said surface when the nozzle is in operative position on the surface.

2. In a suction nozzle for cleaning a surface, a hollow body formed with a cleaning opening bounded by lips, a member movable with relation to said body from a position outside said opening to a position within the opening, the dimensions of said member being such with respect to those of said opening that when the member is in the second-mentioned position there is provided a small opening between said member and one of said lips, the portion of said lip adjacent to said small opening being cut away to provide a. passage for flow of air over said surface and into said small opening, said mem ber having a passage forming an auxiliary air inlet to said hollow body when said member is in the second-mentioned position and spaced from said surface, and a rim on said member 5 around said auxiliary inlet on the side thereof which is adjacent to said surface when the member is in said second-mentioned position, said rim extending downwardly to contact said surface when the nozzle is in operative position on the surface.

3. In a suction nozzle for cleaning a surface, a. hollow body formed with a cleaning opening bounded by lips, a member movable with relation to said body from a position outside said opening to a position within the opening, the dlmensi-ons of said member being such with respect to those of said opening that when the member is in the second-mentioned position there is provided a small opening between said member and one of said lips, the portion of said lip adjacent to said small opening being cut away to provide a passage for flow of air over said surface and into said small opening, said member together with another of said lips bounding a passageway which forms an auxiliary air inlet .to said hollow body when the member is in the secondment-ioned position and spaced from said surface, and a rim on said member around the portion of said auxiliary inlet which is bounded by said member, said rim being on the side of the member which is adjacent to said surface when the member is in said second-mentioned position and extending downwardly to contact said surface when the nozzle is in operative position on 5 the surface.

AXEL ALBERT FORSBERG.

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