US2241775A

US2241775A - Nozzle for vacuum cleaners

Info

Publication number: US2241775A
Application number: US227607A
Authority: US
Inventors: Forsberg Axel Albert
Original assignee: Electrolux Corp
Current assignee: Electrolux Corp
Priority date: 1937-09-02
Filing date: 1938-08-31
Publication date: 1941-05-13
Anticipated expiration: 1958-05-13
Also published as: GB517894A; CH205137A; NL48723C; US2241776A; FR842524A; DE687384C

Description

May 13, 1941- y A. A FORSBERG 2,241,775

NOZZLE FOR VACUUM CLEANERS Filed Aug- 31, 1938 vg A 1830 "M N Z7 3. ,nWlllm-i/ m 13 .14 l 2 3 26 INVENTOR Patented May 13,1941

-NirED STATES PATENT OFFICE l 2,241,715 Nozzles Fon vA'cUUM CLEANERS Axel Albert Forsberg, Stora Essingen, Stockholm, Sweden, assignor to Electrolux Corporation, Dover, Del., a corporation of Delaware Application August 31, 1938, Serial No. 227,607 In Sweden September 2, 1937 for use with vacuum cleaner nozzles to permitthe ready entrance oi the dirt and dust into the nozzle without, at the same time, too greatly reducing the suction available for Vlifting the dirt and dust.

What I considerto be novel and my invention may be better understood by reference to the following specication 'and appended claim when considered in connection with the accompanying drawing, in which Fig. i is a front elevation of the improved nozzle;

Fig. 2 is a bottom view;

F1323 is an enlarged sectional view taken along line S-S ci Fig. l;

Fig. si is a sectional view taken along line Fig. 5 is an enlarged detailed view of a portion of Fig. 4; and

Figs. 6 and 7 show two alternative arrangements of the brush sections along the forward edge of the nozzle.

Referring to the drawing. It indicates a, nozzle bodywinch is connected with an air conduit Il by means oi an elbow I2. Depending from the rear edge of the mouth oi the nozzle body Ill is a brush section itl. The brush section It consists of bundles ci tbristles which are tightly compacted and extend along the rear edge oi the nozzle #body lli between its two ends. The brush section it conforms to the shape oi the rear edge of the nozzle body Id. At the end, shown'at the left in Fig. 2, a; 'brush section M is secured extending outwardly at an angle to the bottom surface of the nozzle body lf. A similar brush section I5 is secured to the. opposite end of the nozzle body'i, shown at the right in Fig. 2. De-

pending from the forward edge of the nozzle body It are a plurality of brush sections I6 to the left of the center line of the brush, and brush sections Il to the right. `Brush sections i6 are of triangular shape with the apex of the triangle extending forward in the normal direction of movement of the nozzle bodyIG. The brush sections I1 may be described as of wedge shape with the small side of the wedge extending forward. The brush sections I 6 are formed by six bundles ofbristles with the exception of the brush section I6' at the extreme left which has only three bundles of bristles. The brush sections Il are formed-of nine bundles of bristles.

The brush sections I3, I4, i5, I6, and Il are mounted in a, plate `I8 secured to the nozzle body Il) by means of screws I9. y

-In the cleaning of a iioor, rug, or other surface, the nozzle body I0 is moved forwardly-over the surface to 'be cleaned. The suction produced by the vacuum cleaner, not` shown, is communicated tothe nozzle body it by means of the conduit Il and elbow I2. mbow I2 communicates with an opening 2d in the bottom of the nozzle body I0. As the nozzle body l0 is moved forwardly over the surface beingcleaned, air is drawn in between the brush sections I6 and Il, and due to the triangular or wedge shape, respectively, of these brush sections, an injector action is produced increasing the velocity of the air as it enters in the region of the 'nozzle mouth. The

high velocity air passes close to the surface being cleaned, raises the dirt and dust located on the surface, and carries it into the region ci the nozzle mouth. The tightly compacted brush section I3 secured to the rear edge of the nozzle body I0 prevents this dirt and dust from passing beneath the nozzle mouth as the nozzle body iB is moved forwardly. It is not anticipated that under ordinary circumstances, brush sections,

triangular in shape, such as brush sections i and wedge shaped brush sections, such as brush sections I1, should both be provided on the iorward edge of the nozzle body Ill. Either of these forms of brush sections may be used as desired but the brush sections would ordinarily be uniform throughout the length of the forward edge.

`The forward edge 2i to which the brush sections I8 and I1 are secured is formed in a. straight line to permit cleaning close to the edge of woodwork, furniture, and the like. The inclined ends of brush sections id and I5 also facilitates cleaning close to obstacles without the necessity of contact between the brush nozzle body IB and the obstacle. The rear edge 22 to which the brush section I3 isvsecured is formed with a compound curve substantially convex to provide a greater width for the nozzle mouth at the center than at the two vends. This tends to equalize the difference in the air iiow and suction at the two ends most remote from lthe central opening 28 and at the center.

mg cleaned, and also, seals the top portion of Y the brush sections to insure a ow -of air along the surface being cleaned. Plate 23 is provided with a central elongated opening 28 which registers with the opening 20. I secured around the edge of the plate I8 in` which the brush sections are mounted. Bumper 21 has an inturned ange 23 which is clamped between the nozzle body I and the plate I8. A collar 29 extends upwardly from the -flange 28 engaging a shoulder 30 provided around the inner edge of A rubber bumper 21 is the nozzle body I0. The collar 29 prevents 'the bumper 21 from slipping out of position. A portion of bumper 21 extends downwardly 'overlying a portion of the brush sections. To prevent the depending portion of bumper 21 from forcing the two end brush sections I4 and I5 inwardly, a protecting plate 3i, shown in Fig. 5, is secured to the two ends of the nozzle body I0 between the bumper 21 and the brush sections I4 and I5. Elbow I2 is pivotally secured to the nozzle body Il) by means of an annular ring 32' shown in Fig. 3 which seats in cooperating recesses in the elbow I2 and body I0.

bviously, a number of arrangements oi brush sections may be used to produce the desired effect of the brush sections I6 and I1. By way of examf ple, two such arrangements are shown in Figs. 6 and 7. In Fig. 6, vthe brush sections 33 are secured to the front edge 2| at an angle thereto producing inclined openings 34 between the brush sections 33. It will be noted that looking from the front toward the leading edge 2 I, the brush sections 33 completely cover the extent of the leading edge. A somewhat similar result is accomplished by the arrangement, shown in Fig. '7, in which

alternate brush sections

35 and 36 are reversed with respect to the positioning of the apices of the triangular sections. In a like manner, looking at the front edge 2| Iof Fig.- 7 the complete extent of the forward edge is covered by the

brush sections

35 and 35. The air entering the nozzle mouth passes in opposite directions on the two sides of the brush sections 35. It is apparent that other arrangements of brush sections may be used in those illustrated herein, but it is to be understood that this invention is not limited to these specific arrangements. Other arrangements may be used Within the scope of this invention as pointed out in the appended claim.

What I claim is:

A nozzle for vacuum cleaners including a nozzle body having a suction opening, closely packed brush bristlesdepending from the rear edge and two ends of the nozzle body around said suction opening, and closely packed brush bristles secured in sections extending in spaced relation from the forward edge of the nozzle body, said brush sections having a triangular cross-section with the apex of the triangleextending forwardly.

' v AXEL ALBERT FORSBERG.