US2237725A

US2237725A - Suction nozzle

Info

Publication number: US2237725A
Application number: US252279A
Authority: US
Inventors: Cranmer George Horace
Original assignee: Electrolux Corp
Current assignee: Electrolux Corp
Priority date: 1939-01-23
Filing date: 1939-01-23
Publication date: 1941-04-08
Anticipated expiration: 1958-04-08

Description

April 1941- G. H. CRANMER 2.237.725

SUCTION NOZZLE Filed Jan. 23, 1959 INVENTOR M6 AnM/cz dam/1 114..

ATTORNE Patented Apr. 8, 1 941 OFFICE SUCTION NOZZLE George Horace Cranmer, Philadelphia, has assignor to Electroiux Corporation, New, York,

N. Y a corporation of Delaware Application January 23, 1939'. Serial No. 252,279

- 4 Claims. (cl. -156) My invention relates to suction nozzles, and

more particularly, to suction nozzles for cleaning rugs.

In cleani s was there are different conditions to be met depending upon the type of ms to be cleaned, and the type of dirt to be removed by the suction nozzle.

Dirt embedded in the pile of a rug is most convenientlyremoved by a suction nozzle having smoothlips and producing a flow of a large volume of air through the rug pile. In removing surfaced dirt. hairs, threads, and the like, it is desirable to produce a high velocity of air flow along the rug surface. An agitator for separating or loosening hairs, threads, etc., tenaclously adhering tothe surface of the rugis desirable, especially in the case of high pile rugs, such as Oriental rugs.

' formed by milling the rod I! at right angles to 10 In accordance with my invention, an improved suction nozzle is provided with a relatively large suction opening having smooth lips surrounding it for removing embedded dirt, and a relatively narrow suction opening with an agitator bar for removing surface dirt. I

My invention also contemplates the construction of such anozzle with -a minimum number of parts and with minimum of separate securing means.

What I consider to be novel and my invention may be better understood by referenceto the following specification and appended claims when considered in connection with the accompanying drawing. in which Fig. 1 is a top plane view of. my improved suction nozzle: I

Fig. 2 is a rear elevation, partly in section along the line-2'2 of Fig. 1;

Fig. 3 is an enlarged detailed sectional view taken along the line 3-4 of Fig. 2; and

Fig. 4 is an enlarged detailed view of a key for securing a pivoted elbow to the nozzle.

u is provided with a rod it having a central passage l0. Passage I communicates with the interior of the body II and provides a suction opening smaller than the suction'opening II and suillciently small to produce a high velocity flow of air when connected to a vacuum cleaner;

Rod II is provided with spaced lugs I! located at each side of the passage l6." Lugs ll may be the pasasge I. The height of the lugs I1 is greatest adjacent the passage It forming a sharp edge at the passage i8. Spaced lugs I! are provided on the reverse side of rod l5 adjacent each side of the passage 10., The lngs II are longer, wider and spaced farther apart than the lugs ii. The spaces between-lugs it are curved producing smooth side edges on the lugs II for a. purpose that will be pointed out below. The novel features of rod I 5 are covered by an application filed by me concurrently herewith Serial No. 252,278. r

- The ends of rod I! enter recesses is in top II, as shown at the left in Fig. 2. Rod it may be bowedout at its center to frictionally engage top H and hold the rod-in a selected position. Top ll, rod. is, and guideplates. 20 are secured to bottom I 2 by a plurality of screws 22. liilnger grip 23 is connected to the rod II for convenience in rotating the rod to a position to present lugs II or lugs 18 as desired. Adjacent the extremities of rod is, two gliding surfaces 2.4 extend outwardly from the top II and serve the dual functions of i'actilitating the movement of the Referring to the drawing It indicates a slice tion nozzle body having a top part Ii and'a bottom part l2. The bottom part 12 is provided with an elongated suction opening II surrounded by smooth lips I. Suction opening it is used for the general cleaning of rugs and for removing dirt embedded in the rug pile. The smooth lips I seal against a rug surface and so cause 'air to pass through the rug pile. Two guide plates 20, one of. which is shown at the left in Fig. 2, secured within the nozzle body]! serve to direct the air from the ends of the suction opening is toward the center. For removingsurface dirt, hairs. threads. and thedike. the top are in the relative positions shown in Fig. 2, the

.by means of the connection of a suction conduit nozzle along a rug surface and locating either the 1118s ll or the lugs II at the surface of the rug. Aypivoted elbow! 25 communicates with the interior of the body I and may be connected to a vacuum cleaner, not shown, through the intermediaryof a'suction conduit. Elbow 25 is secured to body III by means of a key 2| which flts in a slot 2' provided in the bottom [2. Key 2| enters a groove-21 formed by a shoulder}. in elbow 2i and the end of a sleeve 2! extending over the end of elbow 2!. Key 2| is held in position by engagement with top H. as shown in Fig. 2. When elbow 25 and body I! suction'produced bya vacuum cleaner is communicated to the suction opening I I. "By rotating the body ll about the elbow 28 through an angle of degrees, communication is established with the passage It. I I

When the nozzle body "is to be used for cleaning sang, it is connected toa vacuum-cleaner as lugs I! serve to loosen the The embedded dirt is removed from with the bottom l2 in to elbow, 25. the rug by traversing it contact with the rug sm-face' to remove surface dirt, hairs, threads, and the like, the nozzle body It) is rotated on the elbow 25 to a position with the top H in contact with the rug. With the rod I5 in the position shown in Figs. 1 to 3, the lugs l1 engage the rug surface.

The end extensions 24 serve to position the lugs II at the surface of the rug pile. Air entering the passage l6 travels along the surface of the pile and dueto the relatively small cross-sectional area of the passage l6 attains a high velocity. As the nozzle is moved across a ru locity air flow will carry the surface dirt including the loose hairs, threads, etc., into the passage l6. Hairs, threads, or the like which are adhering tenaciously to the surface of the rug pile are loosened by the lugs H. The forward edges of the lugs I'I adjacent the rear of the passage It, determined by the direction of movement of the nozzle, serve to loosen the threads and .the like. The lugs l1 on the opposite side of the passage When it is desired.

openings in plates 20 and bottom l2. The rod [5 is then inserted in the top l l with its ends extending into the recesses IS. The top H and rod l5 are then placed on bottom 12 and secured thereto by the screws 22. The two screws 22 alone serve to secure all of the parts of the nozzle in assembled relation. The key 2| pivotally secures the elbow 25 to the nozzle body without any exposed securing means.

the high v e- I6 serve to guard the sharp edges of the other lugs l1 and prevent them from becoming deeply embedded in the rug pile. Regardless of the direction of movement of the nozzle one set of threads and the other set on the opposite side of passage l6 serve as guards for the first set. The spaces between the lugs l1 permit a flow of air right at the surface of the pile from both sides into the passage it.

The passage l6 being of uniform cross-section throughout its extent the velocity of the air is maintained in its passage therethrough and there is no tendency for dirt picked up'by high velocity air being precipitated again due to a reduction in the velocity as the air enters the nozzle. An important advantage obtained from the location of the lugs IT on each side of the central passage I6 is the equal facility with which surface dirt may be removed upon movement-of the nozzle in a forward or reverse direction.

In cleaning hooked rugs which have looped threads at the surface instead of the free ends of a pile, as do other rugs, there is a possibility that the lugs l'l may catch in the surface threads. The lugs l8 are wider and do not have the sharp side edges'of the lugs I1 due to the curved surfaces between the lugs IS. The lugs i8 will not catch in looped surface threads and so may be used for cleaning hookedrugs. The lugs l8 perform the same function as the lugs' l1 and if desired may be used forrthe surface cleaning of other rugs especially low pile rugs.

In the assembly of the suction nozzle body Hi, the elbow 25 is' inserted in position in bottom l2 and the key 2! dropped in'the slot 26. The guide plates 20 are then inserted-within the bottom 12' and the screws 22 passed through the What I claim is:

1. A suction nozzle including a bottom part having a. suction opening, a top part having a second suction opening, an elbow extending through anopening into'said bottom part adapted to communicate in one position with said first-named suction opening and in another position with said second-named suction opening, said elbow having bottom part having a slot extending from-the top 4 to the side opening of said bottom part, a tubular member extending'through the side opening of said bottom part-and having an annular groove positioned in line with said slot, a flat key located in said slot extending into saidgroove, a top part having a second suction opening and extending over the slot in said bottom part, and means to secure said'top part to said bottom part.

3. A suction nozzle including a body member having a suction opening and a side opening, a slot in said body member extending from said side opening to the top of said body member, a tubular member extending into said side opening and communicating with said suction opening, said tubular member having an annular groove registering with said slot, a flat key located in the slot of said body member and extending into said groove, a cover for the top of said body member overlying said slot, and means to secure said cover to said body member.

4. A suction nozzle including a body member having a suction opening and a side opening, said body member having a slot extending. from said side opening to the top of said body member, a tubular elbow extending through said side opening and communicating withsaid suction opening, said elbow having an annular groove regis-