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Патент USA US3071965

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Jan. 8, 1963
c. l. PLATT ETAL
'
3,071,955
WASHING MACHINE AGITATOR
Filed July 27, 1961
»
2 Sheets-Sheet 1
25
2/17; 12:47am
Jan. 8, 1963
c. l. PLATT ETAL
3,071,955
WASHING MACHINE AGITATOR
2 Sheets-Sheet 2
Filed July 27, 1961
39
2.5’
.51
MN
I
United States Patent ‘O?lice
3,071,955
Patented Jan. 8, 1963
2
1
means of a removable bolt 25 a cap 26 having an outer
3,071,955
cylindrical side 27 extending downwardly around and
beneath the top 28 of the agitator 15.
In order to prevent excessive sudsing in the washing
WASHING MACHINE AGITATSR
Clark 1. Platt, Benton Harbor, Ernest B. Ruble, St.
Joseph, and Vincent C. Mandarino, Jr., Benton Harbor,
Mich., assignors to Whirlpool Corporation, a corpora
solution 29 in which the clothes are suspended, as indi
cated at 30, the agitator 15 comprises a plurality of
radially extending vanes 31 that are spaced from each
other to provide liquid ?ow passages between the vanes
so that liquid may be drawn inwardly between the vanes
tion of Delaware
Filed July 27, 1961, Ser. No. 127,342
6 Claims. (CI. 68-53)
This invention relates to an agitator for a washing 10 as indicated by the arrows in FIGURE 1 and into the
machine.
inlet portion 21 of the pump to be expelled outwardly
In one type of washing machine where clothes are
radially along the bottom 18 of the basket 11 by the
laundered in a washing liquid such as an aqueous detergent
rotating pump 19.
solution agitation is achieved by employing a vertically
With the vanes constructed in this manner the vanes
reciprocable agitator. Then, pumping means are pro 15 move through the liquid 29 smoothly without carrying
vided adjacent the bottom of the container in which the
with them excessive quantities of air from the atmosphere
detergent solution and clothes are contained to direct the
above the liquid level. In effect the vanes may be said to
washing solution outwardly in a radial direction from a
knife through the solution'and the smooth sides 32 of
vertical axis along the bottom of the container. The
each vane agitate the liquid to only a minimum amount.
vertical reciprocation of the agitator combined with the 20
Each vane 31 is provided with an outer edge 33 shaped
pumping action pulls the clothes downwardly along the
agitator, outwardly toward the sides of the container and
then radially inwardly toward the agitator to complete the
flow path.
to provide a series of downwardly facing stepped portions
34 extending from beneath the normal liquid level to
adjacent the bottom of the agitator 15. In the preferred
construction these stepped portions for each vane are'of
decreasing depth from an upper part of the vane to the
bottom of the vane. With this arrangement the portions
34 engage the clothes and move them downwardly through
It has been found that in these vertically reciprocable
agitators the agitator itself extends to whip the washing
solution into an excessive foam, because the vertical re
ciprocation 0f the agitator not only pulls the load down
wardly but also pulls in air and mixes it with the low
surface tension washing solution. The attempts to solve
this problem in the past have been limited to using low
’ the washing solution 29 toward the bottom of the tub 11
where they are caught in the radial stream ?owing from
the pump 19. This stream tends to move the clothes out
toward the side wall 35 and up along this wall and then
back toward the agitator 15 as is shown by the illustrative
sudsing detergents.
The agitator of the present invention successfully solves
this excessive sudsing action in Washing machines with
arrows in FIGURE 1.
vertically reciprocable agitators so that any desired de
tergent can be used without fear of excessive sudsing.
One of the features of this invention therefore is to
such as Bakelite. It is preferred that the vanes 31 be
kept fairly thin with the preferred thickness of each vane
being approximately 1%; to % inch. In the agitator the
vanes are tied together by an upper cylindrical and in
tegral collar 36 surrounding the shaft 13 and the shaft
provide an improved vertically reciprocable agitator for
a washing machine.
'
The agitator 15 is preferably made of a molded plastic
7
Other features of the invention will be apparent from 40 23, by an intermediate cylindrical portion 37 immediately
the following description of the invention as shown in
adjacent the shaft 13 and also integral with the vanes and
the accompanying drawings. Of the drawings:
a lower portion 38 at the bottom of the agitator and
FIGURE 1 is a sectional view illustrating pertinent
parts of a washing machine having an agitator embodying
surrounding the inlet portion 21 of the pump. In order
to give added strength to the agitator four of the vanes
45 illustrated at 39 which are equally spaced around the
the invention.
FIGURE 2 is a horizontal sectional view taken sub
agitator are somewhat thicker than the remaining vanes.
stantially along line 2—2 of FIGURE 1.
In the embodiment of FIGURE 3 the agitator 40 is
FIGURE 3 is a vertical sectional view of a second
provided with a plurality of vanes similar to the vanes
31 and 39 and is also provided with downwardly facing
embodiment of the agitator.
In the embodiment of FIGURES 1 and 2 the washing 50 stepped portions 41. In this embodiment, however, the
machine 10 comprises an imperforate basket 11 supported
portions of the edge 42 of each vane are provided with
generally upwardly facing smoothly rounded serrations
on a frame 12. There is provided a vertically extending
shaft 13 in the washing machine that is rotatable by an
electric motor 14 positioned beneath the frame 12. Sur
43.
These serve to give an added scrubbing action to
the clothes as they move downwardly along these edges
rounding the shaft 13 is a generally cylindrical agitator 55 42 in the manner described earlier in conjunction with
15 that carries a cam follower 16 extending radially of
the ?rst embodiment of the invention.
the shaft 13 and engaging a cam track 17 on the outer
In the embodiment of FIGURE 3 each vane edge 42
has at the bottom an outwardly and downwardly sloped
surface of the shaft. This provision of the cam track and
cam follower causes vertical reciprocation of the agitator
surface as indicated at 44. These series of projections
15 in the manner illustrated in Walton Patent 2,770,118. 60 serve to agitate any dead water area that might occur be
Mounted on the shaft 13 adjacent the bottom 18 of
tween the last stepped portion 34 of an agitator such as
15 and the pump housing 20. These projections also
the basket 11 is a centrifugal pump 19 within a pump
direct the downwardly traveling clothes outwardly so they
housing 20. The pump housing has an inlet portion 21
can be caught by the stream of liquid coming from the
surrounding the bottom of the shaft 13 and itself is sur
rounded by the hollow bottom of the agitator 15. Ex 65 pump and not be held in the space above the pump hous
ing illustrated at 20 in FIGURE 1.
.
tending between the top of the inlet portion 21 of the
The agitator in both embodiments is generally cylindri
pump and abearing support member 22 at the top of the
cal and the outer edges of the vanes are substantially
shaft 13 is a plurality of vertical shafts 23 which support
cylindrically aligned as illustrated in FIGURE 2.
the bearing support member 22 and in turn the bear
ing 22a.
7
Extending upwardly from the bearing support member
22 is a plurality of brackets 24 on which is mounted by
70
Having described our invention as related to the em
bodiments shown in the accompanying drawings, it is
our intention that the invention be not limited by any
3,071,955
of the details of description, unless otherwise speci?ed,
washing liquid including a container with a bottom and
but rather be construed broadly within its spirit and scope
a pump adjacent said bottom rotatable about an axis for
as set out in the accompanying claims.
directing liquid in a path radially along said bottom, a
We claim:
1. In a Washing machine for laundering clothes in a
Washing liquid, a vertically reciprocable agitator compris
vertically reciprocable agitator comprising: a generally
cylindrical body member above and coaxial with said
pump having radially extending smooth sided vertical
ing: a body member having radially extending smooth
vanes spaced from each other to provide vertical liquid
sided vertical vanes spaced from each other to provided
flow passages therebetween for ?ow of liquid into said
pump, with each vane having an outer edge shaped to
vertical liquid flow passages therebetween, with each vane
having an outer edge shaped to provide a series of down 10 provide a series of downwardly facing stepped portions of
wardly facing stepped portions.
decreasing depth from an upper part of the vane to the
bottom of said vane, each said vane edge having an out
2. The agitator of claim 1 wherein said stepped por
tions for each vane are of decreasing depth from an upper
wardly and downwardly sloped portion adjacent its bot
part of the vane to the bottom of said vane.
tom and above said path.
3. In a washing machine for laundering clothes in a
washing liquid, a vertically reciprocable agitator com
prising: a body member having radially extending smooth
sided vertical vanes spaced from each other to provide
vertical liquid ?ow passages therebetween, with each vane
6. In a washing machine for laundering clothes in a
washing liquid including a container with a bottom and
a pump adjacent said bottom rotatable about an axis for
directing liquid in a path radially along said bottom, an
agitator comprising: a generally cylindrical body mem
having an outer edge shaped to provide a series of down 20 ber above and coaxial with said pump having radially
extending smooth sided vertical vanes spaced from each
wardly facing smoothly rounded serrations between said
stepped portions.
other to provide vertical liquid ?ow passages therebe
4. In a washing machine for laundering clothes in a
washing liquid including a container with a bottom and
a pump adjacent said bottom rotatable about an axis for
wardly facing stepped portions of decreasing depth from
directing liquid in a path radially along said bottom, a
an upper part of the vane to the bottom of said vane,
tween for ?ow of liquid into said pump, with each vane
having an outer edge shaped to provide a series of down
vertically reciprocable agitator comprising: A generally
each said vane edge having an outwardly and downwardly
sloped portion adjacent its bottom and above said path
cylindrical body member above and coaxial with said
pump having radially extending smooth sided vertical
and each said vane edge having upwardly facing smoothly
vanes spaced from each other to provide vertical liquid 30 rounded serrations between said stepped portions.
?ow passages therebetween for ?ow of liquid into said
References Cited in the ?le of this patent
pump, with each vane having an outer edge shaped to
provide a series of downwardly facing stepped portions of
UNITED STATES PATENTS
decreasing depth from an upper part of the vane to the
bottom of said vane.
‘
5. In a washing machine for laundering clothes in a
496,506
1,838,595
Allgaier ______________ _.. May 2, 1893
Turner ______________ __ Dec. 29, 1931
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