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Патент USA US3080604

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March 12, 1963
Filed. Feb. 19, 1959
fLakleekJtblcl ENTOR5
Patented Mar. 12, 1963
opening 11, thus providing the maximum suction. When
the nozzle is pulled back, the spring 67 is compressed and
the slot 63 opened, as shown in FIG. 2, thus admitting
Erik Reinhold tiarlberg, Stockholm, and Karl John Walli
outside air into the nozzle and reducing the suction therein.
The space between the end wall 68 and the head 69 is
in communication with the outer air through opening 62,
during the reciprocation of the valve member 65, so that
borg, Stoclrholm-Vallinghy, Sweden, assignors to
A‘ktieholaget Electrolux, Stockholm, Sweden, a corpo
ration of Sweden
Filed Feb. 19, 195%‘, der. No. 794,446
Claims priority, application Sweden Feb. 22, 1958
3 Qlaims. (Ci. 15-421)
there can be no air cushion or vacuum in this space to
interfere with the free movement of the valve member.
This invention relates to means for regulating the suc
tion of vacuum cleaners, and more particularly to valve
The above described arrangement is particularly ad
vantageous in the cleaning of thin rugs, which, with the
conventional cleaner tend to cling to the suction inlet of
means disposed between the inlet opening of the suction
the nozzle when the nozzle is moved in a direction from
nozzle and the fan of a vacuum cleaner and serving to
the free edge of the rug. With the present invention, this
is avoided. The usual procedure is for the operator to
regulate the suction at such inlet opening responsive to
conditions incident to the cleaning operation being effected
by said nozzle.
The principal object of the invention is to devise im
stand on the rug and move the cleaning nozzle back and
forth over it. In pushing the nozzle 16 from him toward
a free edge of the rug, in the direction of the arrow in
FIG. 1, especially when trying to loosen dirt ?rmly held
proved valve means which is embodied in the nozzle
20 in the rug, the natural tendency of the operator is to press
structure itself.
down on the nozzle it} with the wand 61. This com
In the preferred form of the invention, said valve means
presses the spring 66 and closes the valve opening 63,
is adapted to be operated by pressure on the surface
as described and shown in FIG. 1, thus causing the entire
being cleaned.
suction produced by the fan to be available at the inlet
In order that the invention may be clearly understood,
opening 11 of the nozzle It? for effective cleaning. When
drawing the nozzle Ill back toward himself from the free
part of this speci?cation, and illustrating a preferred em
edge of the rug, in the direction of the arrow in FIG. 2,
bodiment of the invention, in which drawing:
the operator does not press down on the nozzle with
KG. 1 is a vertical transverse section along a plane
wand 61, and the spring expands, thereby opening the
parallel with the direction of movement of a suction
nozzle showing an embodiment of the invention, in which 30 valve opening 63, admitting outside air to the nozzle, and
reducing the suction at the suction inlet 11. Thus, during
the valve means comprises a member constructed to be
the rearward or back stroke, the suction is reduced to
connected with the suction hose of the cleaner and mov
reference is had to the accompanying drawing forming
able horizontally transversely of the nozzle; and
such an extent as to prevent any tendency of the rug to
FIG. 2 is a similar view, showing the valve means in
a different position.
Referring to FIGS. 1 and 2, the vacuum cleaner nozzle
cling to the inlet opening 11 of the nozzle, and the rug
comprises an elongated hollow body 10, having an inlet
or suction opening 11, the edges 20‘ of wihch are preferably
1. In combination, a nozzle comprising a hollow body
remains smooth and ?at on the floor.
What we claim is:
including front and rear spaced walls having bottom lip
portions de?ning a suction inlet normally movable for
rounded. A valve body is displaceable horizontally and
transversely of the nozzle. It comprises a hollow cy 40 ward and backward on the surface, the nozzle body having
an outlet and further including wall means de?ning a
lindrical member 65 closed at its front end by a wall 68,
chamber of cylindrical form whose axis is substantially
and having at its rear end an angularly disposed socket
parallel to the direction the nozzle is normally moved
69, adapted to receive the usual wand or tubular shaft
forward and backward on the surface, the chamber being
61 to which the hose is connected. The nozzle body It)
includes a cylindrical barrel 10' in which the valve mem 45 removed from the inlet and forming a part of the path of
ber 65 may freely slide. The forward end of this barrel
?ow for air from the inlet to the outlet, the effective size
is closed by a head 69, and screwed into the rear end is a
of the inlet being the same when the nozzle is moved
locking ring '71 which surrounds the socket portion 60.
forward and rearward in the normal direction with its
This socket portion, where it passes through the ring 71,
suction inlet in contact with the surface, the chamber wall
is of smaller diameter than the cylindrical valve member 50 means being apertured to provide an opening therein, a
65, thus forming an annular shoulder 70 between these
sleeve valve member comprising a hollow cylindrical ele
two parts. A compression spring 67 surrounds the portion
ment which is axially movable in the chamber at the
of smaller diameter and is con?ned between the annular
immediate vicinity of its wall means, the hollow element
shoulder ‘iii and the lock ring 71. A similar spring 66
is con?ned between the head 69 and the front end wall
68 of the valve member, so that the valve member is
inlet and the interior of the chamber and to provide a
path of flow into the interior of the chamber for air
passing through the opening in the chamber wall means,
The lower side of the barrel fit’ is formed with two
structure including said valve member for decreasing the
openings or slots 62 and 63, and the edge 64 of the slot
63 constitutes a seat for engagement by the valve mem 60 size of the opening during forward movement of the
nozzle responsive to forward thrust applied thereto while
her as, to close the slot, as shown in FIG. 1.
its inlet is in contact with the surface and for increasing
A segmental notch 74 is cut out of the lower side of
the size of the opening during rearward movement of the
the valve member 65, this notch being of such width as
nozzle responsive to a pulling force thereon while its
to bridge the inlet or suction opening 11 of the nozzle
and slot 63, and being of a height commensurate with the 65 inlet is in contact with the surface, and ?rst and second
resilient means disposed in the chamber, said ?rst and
length of this slot. Thus, it is the edge of notch 74 which
second resilient means being so formed and arranged that
co-operates with the seat 64 to close the slot 63.
said ?rst resilient means is compressed responsive to
When the nozzle is pushed forwardly over a rug, the
front spring 66 will be compressed as shown in FIG. 1, 70 movement of the hollow element in one direction during
forward movement of the nozzle and said second resilient
and the valve member 65 will close the slot 63, as de
means is compressed responsive to movement of the
scribed, so that all the air is drawn in through the inlet
balanced by these two springs.
being apertured to establish communication between the
hollow element in the opposite direction during rearward
References Cited in the ?le of this patent
Kroenlein ____________ __ May 2,
movement of the nozzle.
2. Apparatus as set forth in claim 1 in which the for
ward end of the hollow element nearer to the front wall
of the nozzle body is closed, and the opposite rear end
thereof serves as the outlet of the nozzle.
3. Apparatus as set forth in claim 2 which ‘comprises
an elbow which is joined to the rear end of the hollow
element andincludes an arm extending at an angle to the
horizontal in a generally upward direction.
Taylor ______________ __ Feb. 12, 1952
Draudt ______________ __ Sept. 13, 1955
Wahlborg ______ ._;..'..._._._'_ API‘. 11, 1961
Brown ________________ __ Ian. 3, 1-961
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