US2333471A - Suction nozzle - Google Patents

Description

Nov. 2, 1943. G. H. CRANMER l 2.333,47l l sUcTIoN NzzLE Filed Ap'ril 2s, 1941 PatentedNov. '2, I

UNITED STATES PATENT .OFFICE sUcTloN NozzLE George Horace Cranmer.

signor to Electrolux Corporation,

Philadelphia, ra., as-

New York;

N. Y., a corporation of Delaware Application april 2s, 1941, serial No. '389,832

' 2 claims. (ol. 15155) i My invention relates to suction nozzles and more particularly to sucti'on nozzles for cleaning rugs.

An object of my invention is to provide an improved suction `nozzle for cleaning rugs, and particularly for removing embedded dirt therefrom.

What I consider to be novel and my invention may be better understood by reference to the following specification and appended claims when 'nected to an intake opening of casing I2, at'one end, and, at the other end, is connected to a suction nozzle I4 with an intermediate, rigid,

- tubular handle member I5. A motor-fan unit I6 is located in casing I2 for producing a suction. In the operation of this type-of vacuum cleaner, nozzle I4 is moved back and forth over a ber I5.

In removing embedded dirt from a rug, it is desirable to agitate the rug pile in order to disturb the dirt and dust embedded in it. In my improved construction,4 this is accomplished by means of two ribs Il extending parallel and adjacent to an elongated suction opening I8 provided in nozzle I4. At4 each end of the bottom face of suction nozzle I4, a gliding surface I9 is provided of convex shape for supporting the suction nozzle I4 at the surface of the rug during' movement in a forward or rearv ard direction over the rug surface. Due to the convex surface, the nozzle may be slightly inclined forwardly or rearwardly without interfering with the seal between the nozzle and the rug surface. To insure cleaning adjacent the ends of the suction nozzle I4, openings 20, provided in the gliding surfaces I9, communicate with the suction -opening I8 and extend adjacent tothe endsof nozzle I4. A connection member 2I is provided connected to the body of nozzle member I4 and adapted to receive the end of a flexible hose or tubular member for connecting the suction nozzle I4 to a, s'ource of suction.

In the normal operation of nozzle I4, it is reciprocated over a rug surface and in its moveturbing theembedded dirt and facilitating its rement. the downwardly'extending ribs Il tend to flex the rus pile, as indicated in Fig. 4, thus dismoval by the inow of air through the'rug pile into the suction opening I8. Adjacent to the ribs II are smooth lips 22 which engage the top surfaces of rug pile for producing a seal to cause the air to ow downwardly toward' the roots of the rug pile for removing embedded dirt. The smooth lips 22 also serve in conjunction with the end surfaces I9 to support the rug nozzle at the surface of the rug pile. The openings communicating with the suction opening I8 serve toy insurethe cleaning of the rug adjacent to any -furniture located thereon within the proximity of nozzle I4 'at this opening to the end of the surfaces I9. The ribs I1, in addition to flexing the Asurface being cleaned by means of handle memrug pile, also serve to insure a tight seal between the rug surface and the suction nozzle by extending below the surface at the top of the rug pile. This directs the air entering the suction opening downwardly beneath the surface'of the rug pile for removing embedded dirt.

The single narrow rib I'I being located immediately adjacent to the suction opening I8 produces the flexing action .of the rug pile right at the suction opening, thus any dirt or dust which is disturbed by the flexing of the rug pile is carried into the suction opening before it can possily settle back again in the rug pile and become embedded again. The height of the ribs is such as to produce this flexing action without simply bending the rug pile down and compressing it, which would be the case, if the ribs had a greater height. Y

A narrow rib without an adjacent supporting or gliding surface would embed itself too deeply in the rug, interfering with the ease of movement of the nozzle over the rug surface and also too greatly restricting the air flow beneath it. A

relatively wide smooth lip also restricts the air flow by making the air flow path through the l rug relatively long. In this construction, the lip does not project beneath the rug surface too far because of the adjoining lip spaced above it and the length of the air flow path through the' rug pile is simply the width of the narrow rib. This permits a greater ow of air through the rug surface as well as directing the rug pile.

It is to be understood that my inventionis -illustrated in a preferred construction, but it is not liiited to the details of this construction except as pointed out in the appended claims.

it towards the root of y i 2 i ansa-ivi connected to a source of suction, said body having an elongated substantially planar face with an inlet opening therein extending throughout most of its length, a surface on said face extend- K ing along both sides of said inlet opening, s aid surface forming a wide band on each side of said inlet opening and spaced slightly therefrom, one long thin bead formed on said face along each long side of said inlet opening in the space Ibetween said inlet opening and said band, said beads extending slightly downwardly beyond the plane of said face, said face having members projecting from each end thereof, said members l having large nearly planar surfaces parallel to the plane of said face, said members extending downwardly beyond said face a greater distance' than said beads and suiliciently far to'prevent 20 said beads from 'penetrating the pile of a rug being cleaned except just enough to ex the extreme ends thereof as the nozzle passes over a 'rug Vbeing cleaned, said band being adapted to seal against the rug being cleaned.

2. A suction nozzle including av body member having an elongated suction opening in one face, a wide lip extending along each side of said suction opening, an extension forming a gliding surface at each end of said suction opening and extending downwadly beyond said lips, said lips having narrow ribs projecting downwardly therefrom a lesser-distance than said gliding surfaces, said ribs being joined lto said lips in airtight relation throughout their length and extending parallel with and adjacent to .said opening, said extensions having openings communicating with said suction opening and extending substantially to the endsl of said gliding surfaces, and a connection member communicating with the interior of said body member. i v

GEORGE HORACE CRANMER.

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