US2236989A - Vacuum cleaner - Google Patents

Description

April 1, 1941.

G. E. BJORKMAN VACUUM CLEANER File'd March 19, 1938 gwmmmmpn 5 BYX; 615MB OR. 154 4. /6 M A) ATTORNEY.

Patented Apr. 1, 1941 UNITED STATES ATENT OFFICE vACU::: CLEAN 4 ER ie sqreg gemsmssm Application March 19,- 1938. Serial No. 196,836 In Germany March 19, 1937 1 Claim. (01. -158) My invention relates to vacuum cleaners and more particularly to animproved brush nozzle for a vacuum cleaner.

In accordance with my invention there is provided a nozzle having a hollow body formed with an elongated suction opening and within which body. there is arranged a brush member somounted that. it can slide back and forth transversely of the elongated opening as the nozzle is moved back and forth over a surface to be cleaned. Consequently, the brush is always in contact with'the' trailing lip of the nozzle and the dirt which the rections indicated by the arrows in Fig. .3, the friction between the ends of the brush bristles and the surface causes the brush member to lag be hind the nozzle until the member is contacted by the trailing lip of the nozzle. Thereafter. the brush moves over the surface along with the nozzle. If the nozzle is moved to the right, as viewed in Fig.1 3, the rear lip it constitutes the trailing lip and the brush member is contacted by this lip. Consequently, dust and dirt removed from the surface by the brush bristles, and which brush dislodges from the surface and tends to push before it is caught by the air stream entering the nozzle and is conveyed away thereby.

A further feature of my invention resides in the fact that the brush member is removably mounted within the nomle body, whereby it may be readily removed when it is desired to use the nozzle without the brush.

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 this speci ilcation and of which: i

Fig. Us a front view, partially in cross-section, of a nozzle in accordance with my invention;

Fig. 2 is a bottom view of the nozzle shown in Fig. 1;

Fig. 3 is a cross-sectional view taken on the line 33 of Fig, 1; and.

Fig. 4 is a cross-sectional view showing another embodiment of my invention.

Referring to the drawing, reference character It designates a hollow nozzle body formed with a suction inlet opening i l which opening is bounded ..by a forward lip l2. a rear lip i3 and end lips I.

The upper wall of the hollow body is formed with an outlet opening it which communicates with a connection member I adapted to connect the nozzle to a source of suction by means of a hollow conduit 11. t

Secured to the end lips it within the hollow body are guide rails II which are provided with 1 grooves for receiving members II which are secured to the opposite ends of a brush member 2a.

The brush member includes a rigid back II to which are secured bristles 22. The length of the bristles is such that they extend downwardly through the inlet opening H was to contact a surface to be cleaned. The width of the brush member *2. is substantially less than the width nozzle is moved back is pushed along ahead of the bristles, is caught up by the air stream entering the suction opening it and is carried thereby through the outlet opening it, the connecting member I t and the conduit II to a vacuum cleaner unit. when the nozzle moves to the left, as viewed in Fig. 3, the forward lip 12 becomes the trailing lip and the brush member 20 is contacted thereby and the same cieaninl action results as above described.

As will be men particularly from Fig. 2, when the brush member 20 is in either of its extreme positions, it is disposed entirely to one side of the outlet opening it, whereby it does not interfere with flow of air through this opening. 1

In a suction nozzle, a hollow body having at guide rails 23 4 are made of resilient material whereby they may be sprung toward the end in order to release the members II from same ment therewith. thus making it possible to cull: remove the brush member 2| from the neat body. The operation of the embodiment show: in Fig. 4 is the same as'that abovedescribed.

while I have shown two more or less specifi: embodiments of my invention, this has been don: for purposes of illustration only and is not in tended to limit the scope of my invention, whicl is to be determined by the appended claim viewel in the light of the priorart.

opening to contact said surface, the width of at brush member being substantially less than th width of said suction opening guide rails secure within said body adjacent to the ends of set opening and extending transversely thereof. an

means secured to the ends of said brush membe j and forth over a surface to be' cleaned. in the diand engaging elongated slots in said guide rail 2 r 2,236,989 for supporting saidmember within said body for rails being resilient and the slots being located sliding movement back and forth across substan- 'in portions of the guide rails spaced from said tially the entire width of said opening in a plane body. whereby said rails are deformable to disparallel to the plane of said opening and for llmengage said means therefrom in order to remove itin'g movement of said brush member to a. direc- 5 said brush member from said nozzle. tion transverse to said suction opening, said guide GUSTAF ERIK BJORKMAN.

CERTIFICATE OF CORRECTION. Patent Nb. 2,256,989. April 1, 19M.

7 GUSTAF ERIK BJORKMAN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correbtionas follows: Page 1,'sec- I 0nd column, line 26, strike out the words "In a. suction nozzle, a hollow body having an" and insert instead In the embodiment illustrated in Fig. 1;, theand that the said Letters Patent should be readwith this correction therein that the same may conform to the record of the case in the Patent Offioe.

Signed and sealed this 29th day of, April, A. D. 19m.

' Henry Van Arsdale, (Seal) i Acting Commissioner of Patents.

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