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Патент USA US3096135

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Judy 2, 1963
N. n... KENDT
Filed Oct. 19, 1961
2 Sheets-Sheet 1
, E963
Filed Oct. 19. 1961
2 Sheets-Sheet 2
H l5
United States Patent Gn ice
Patented July 2, 1963
drawings a dishwasher, generally indicated by the nu
meral 1, of the type wherein a cabinet 2 is provided, the
cabinet including a stationary back 3 and the conventional
Electric Company, a corporation of New York
side walls 4 and 5. The back and walls .together with a
Filed Get. 19, 1961, Ser. No. 146,106
front door section 6 form the vertical walls of the en
2 Claims. (Cl. 30S-_3.3)
closure 7 within which are positioned a pair of racks 8
and 9 formed to receive and hold dishes to be washed.
This invention relates to slide-out mechanisms, and
The enclosure í-s conventionally closed .by a top section
more particularly to such mechanisms formed for use in
10, and in order to gain ‘access to the enclosure, the door
dishwashing machines.
section 6 is grasped by an upper handle portion 1‘1 and
It is an object of my invention to provide a slide-out
pivoted downwardly about pivot members such as that
mechanism which is formed so as to provide a surface
shown at 12 until it lies substantially horizontally. In its
area of a shape unlikely to retain food particles slung
horizontal position the door forms a guide on which the
against it.
lower rack 9 may be slid out -for ready access and loading;
A more particular object of my invention is to provide 15 it will be understood that the particular cooperative con
such a mechanism for use in connection with a dish rack
ñguration of the door and rack 9 does not form part of
in a dishwashing machine.
this invention and is, therefore, not further described
In one aspect of my invention, I provide a support sys
Norman L. Kendt, Louisvilie, Ky., assiguor to General
tem, or slide-out mechanism, for an article-holding mem
Briefly continuing the description of the dishwasher 1,
ber which may conventionally be a dish rack in a dish 20 it may incorporate suitable washing means such as a
washer. Secured to each of the parallel side walls of the
lower rotatable water ejecting member V13 Iand an upper
dishwasher are two pairs of rollers, a top pair and a bot
rotatable 'water ejecting member .14, together with a
tom pair; all the rollers which are secured to any one wall
rotatable telescoping spraying member l15, all three mem
are positioned in the same plane, with the -front rollers
bers 'being fed from -a pumping assembly structure 16 so
spaced from the back rollers. In addition, the front 25 that ywater is ejected against the dishes with considerable
rollers of each pair and the .back rollers of each pair on
force so as to clean them. The pumping assembly 16
any one wall are equally vertically spaced from each
receives its water through an inlet 17 at the very bottom
other, in track-receiving relation, so as to receive a track
of the enclosure 7, and is normally driven by a motor «18
member which is positioned between the two pairs of
rollers so as to be supported by them and so as to be hori
zontally movable parallel :to the wall. Each of the two
track members has an elongated slot formed extending
in the conventional manner. Motor »18 may, for instance,
30 be of the type which, Iwhen rotated in one direction, causes
entirely therethrough, the slot being elongated in the di
rection of movement of the track member. Two addi
tional pairs of spaced rollers are respectively secured on 35
opposite sides of the article-holding member; each pair of
the additional rollers is positioned in a -slot of a
member. Both of the additional rollers which are
tioned within the slot of a track member lie in the
plane as the two pairs of rollers which support that
the pumping assembly 16 to force liquid up through mem
bers 13, 14 and 15 for diswashing purpoes, and which,
when reversed, causes the pumping assembly to pass liq
uid out -to a drain (not shown).
It will be understood that with such a structure a dish»
washing operation may readily be provided by means of
ya conventional sequence control assembly (not shown)
which controls in suitable sequence the entry of water and
washing materials, lthe spraying of the dishes, and the
track 40 removal of the water. In addition, Áfor drying the dishes
In addition »to the foregoing structural aspects, an im
portant feature of my invention comprises the forming of
the rollers so that each roller has its periphery formed
with a substantially V-shaped annular recess. Also, each
track member has its upper and lower surfaces, and the
upper and lower surfaces of the slot formed therein, ar
ranged ( in cross-section) with convergently sloping sides.
With this structure, `the track member surfaces are re
ceived within the roller recesses in supporting and mova
ble relation. This structure eliminates all food retaining
recesses and surfaces on the track member and thus elimi
nates the undesirable requirement of having `to clean the
track member of food particles in order to insure con
after they have :been clean-sed, a suitable electric heating
element 19 may be provided in the conventional manner,
with the intent being that element 19 also be under the
control of the sequence control assembly so as to -be ener
gized at the end of the washing operation, and during the
washing operation if so desired to assist in heating water.
It will be apparent that while the lower rack 9 may
readily be slid out using door 11 as a track, no such
solution is present with the upper rack 8. Nonetheless,
it is necessary that the upper rack be mounted so that it
will slide out to a position where the entire rack is out
side the dishwasher, substantially as shown in FIGURE 2,
to facilitate the loading of the rack. In this connection,
tinued sanitary conditions lwi-thin the dishwasher.
The subject matter which I regard as my invention is
particularly Ipointed out and distinctly claimed in the con
it is a known expedient to use rollers mounted on the
factors providing complete removal of the rack member
from within the enclosure 7. In the past, however, such
structures have acted as “food catchers,” in that particles
of food remaining on dirty dishes inserted into the dish
washer would, under the inil'uence of the strong jets of
water playing on the dishes, be flung against the track
and retained there by the shape of the track. It is desir
able to avoid this situation and it is toward this goal that
stationary inner wall of the dishwasher, with a track
member being mounted to slide on the rollers and the rack
then being mounted to slide on the track member. With
cluding portion of this speciñcation. My invention, how
such an arrangement, the track member may slide partly
ever, together with further objects and advantages thereof,
may best be understood by reference to the following 60 out of the enclosure 7 and the rack 8 may slide partly over
the end of the track member, the combination of the two
description taken in conjunction Vwith the accompanying
In the drawings,
FIGURE l is a side elevational view, with some of the
parts broken away, of a dishwasher embodying my in
FIGURE 2 is `an enlarged view of the upper portion of
the dishwasher wherein my invention is incorporated; and
FIGURE 3 is a view along line 3~3 in FIGURE 2.
While my invention is, of course, not restricted to the 70 the present struct-ure, now to be described, is aimed.
particular associated structure shown, in order to illus
It will understood that while structure associated with wall
trate the invention and its advantages I have shown in the
4 is featured throughout the following description, an
identical opposing structure is cooperatively provided in
are bowed by manufacturing preference since track mem
ber 24 is generally a molded part.
connection with wall 5 to as to cooperate therewith.
It will be seen that the track member 24 includes virtu
`Rotatably mounted on wall 4 is a .first upper pair of
rollers including a front roller 20 and a back roller 21,
ally all non-vertical surfaces, with only the very outer
and a second lower pair of rollers including a front roller Cl ends, which engage the rollers, being horizontal, and these
horizontal surfaces are limited as much as is possible con
22 and a back roller 23. The «back rollers 21 and 23 are
sistent with the loads they are required to bear. By the
spaced from the front rollers 20 and 22 a lsutiìcient amount
provision of recessed rollers and protruding track por
to provide the support function to be described herein
after. The rollers 20 and 22 and the rollers 21 and 23
tions of the shape described, there are no track portions
are spaced vertically an equal amount from each other so
as to receive therebetween a track member, generally in
dicated by the numeral 24, so that the track member may
be moved forward and backward horizontally in a plane
retain them.
Where so desired, in order to strengthen the track, be~
tween each two roller engaging portions the track may be
parallel to the wall 4, being guided and supported rby the
rollers 20, 21, 22 and 23. The ends of the track may be
which are formed so as to tend to catch food particles and
strengthened by a thickened section such as those shown
by the »numerals 41 and 42 in FIGURE 3. It is impor
enlarged, as shown at 25 at the back end and at 26 at the
front end, so as to act as stops. In other Words, forward
tant in connection with these strengthening portions, when
motion of the track necessarily stops when portion 25
reaches the back roller 21 and backward motion of the
track necessarily stops when portion 26 reaches the rollers
horizontally extending surfaces which might tend to retain
food particles flung against them, and it will be observed
that portions 41 and 42 slope smoothly from their tops
provided, that they too be formed so as to include no
20 and 22.
to their bottoms so as to have no horizontal portions
A slot which is divided into two aligned portions 27 and
28 is formed in the track member 24. 'I'he slot portions
A further advantageous feature of my invention lies in
the provision, lin each roller, of a small groove 43 extend
ing peripherally thcrearound at the center of the groove
32. This small groove 43 is of particular advantage
extend entirely through the track member, i.e., they form
holes therein rather than recesses. In addition, the
lengthwise dimension of the slots extends in the direction
of movement of the track member. The slot portions 27
Where the track member 34 is a molded part.
J¿and 28 are separated by a solid section 29 of track mem
vantage results because the track member is normally
This ad
formed in a mold made up of two like sections which
Rotatably secured to each side of the rack S is a pair of 30 come together at the top and bottom, and in the slot of
the track member. Bec-anse this is the junction line of the
rollers 30 and 31 which are respectively positioned within
two mold sections, it sometimes occurs that there is a nar
slot portions 27 and 28 so as to roll back and forth
row film of molded material left extending along the cen
therein. By virtue of the engagement of rollers 30 and
ter of each of the surfaces 37, 38, 39, and 40. When this
31 within the slot portions -27 and 28 of track 24, the
occurs, its presence may, unless taken care of, harm the
rack is supported for horizontal sliding motion relative
proper engagement of these surfaces with the rollers.
to the track. Thus, when the track has reached its for
er 24.
wardmost position, as shown in FIGURE 2, the rollers 30
However, where groove 43 is provided, the additional film,
member. When the rack is pushed back, the rollers 30
It will readily be understood that with an assembly of
when it exists, is crushed into groove 43 and thus does not
and 31 may then roll Within the slot portions 27 and 28 to
affect the manner in which the remainder of the roller
permit rack 8 to move forward to the position shown
where it is entirely out of the enclosure 7. The front 40 surface engages the track member surface. Thus, groove
43 represents a further improvement lin my improved con
(or left) end of slot portion 27 acts, in this case, as a stop
and 31 slide back in the slot portions 27 and 2S and the
track 24, as previously mentioned, «slides back relative to
rollers 20, 21, 22 and 23. These movements continue
until the movement of the track is stopped, as previously
mentioned, by engagement of rollers 20 and 22 with por
tion 26 of the track member, and movement of the rack
is stopped by engagement of roller 31 with the rear end
of the slot portion 28.
As an important feature of my invention, I cause all of
the rollers on each side, that is, rollers 20, 21, 22, 23, 30
and 31 to be formed with a peripheral V-shaped groove
32 therein, it being understood that “V-shaped” is used
here in the same context as when referring to V belts;
for instance, the “V” may be truncated and still come
within the meaning of the term. Also, the sides of the
V, While they are preferably straight, as shown, to facili
tate manufacture, may be somewhat curved Without de 60
parting from the invention.
All of the r-oller engaging portions of the track 24 are
formed in substantially the same manner in accordance
with my invention. These portions include the top por
tion 33 which is engaged -by rollers 20 and 21, the -bottom
portion 34 which is engaged by rollers 22 and 23, the top
35 of the slot portions 27 and 28 which is engaged by
rollers 30 and 31, and the bottom 36 of the slot portion-s
which is also engaged by rollers 30 and 31. In each case,
the track portion is formed by `convergently sloping sides
which terminate in relatively narrow areas 37, 38, 39 and
40 respectively. In other words, in cross section the
track portions which enga-ge the rollers are also in the
shape of generally truncated V’s; the sides, in this case,
the type described provided on each s-ide of rack 8,
the desired in and out motion of the rack relative to en
closure 7 is obtained while at the sarne time the mechanism
provided does not trap food particles as has been a possi
bility in previous mechanisms of this type.
While I have shown and described a particular embodi
ment of my invention, I do not desire the invention to be
limited to the precise construction disclosed, and I intend
by the appended claims to cover all modiñcations which
fall within the true spirit «and scope of my invention.
What I claim as new and desire to secure by Letters
Patent of the United States is:
1. A support system comprising:
(a) -at least one roller rotatably secured to a stationary
(b) `a substantially V-shaped truncated. annular recess
in the periphery of said roller with the plane of trun
cation providing a contact surface,
(c) a track member asociated `wit-h said. roller and hav
ing convergently sloping sides received within said re
(d) said convergently sloping sides terminating at a flat
portion 'arranged to bear against the Contact surface
of said roller,
(e) said track member being formed of molded mate~
rial made up of two sections which come together at
the top and bottom «and are subjected to irregular
flashing along said flat portion rat their junction line
and in the line of movement of said track member as
»a result of the molding process, yand
(j) a small peripheral groove in` said contact sur-face
-of said roller adapted to receive the irregular flashing
faces formed with convergently sloping sid-es received
along said ñat portion of said track member.
2. A -support system comprising:
within said recess -in said top pair of rollers and said
I(a) a structure havin-g at least one side Wall,
(b) an article-holding member,
(c) a top pair of rollers rotatably secured to said side
wall including «a front roller and a back roller in
spaced relation,
(d) a bottom pair of rollers rotatably secured to said
side wall including a front roller and a back roller
in spaced relation,
(e) a track member supported by said top pair and said
bottom pair of rollers for horizontal movement par
allel to said side Wall,
(f) an elongated slot formed in said track member »and
extending in the direction of movement of said track 15
(g) an -additional pair of spaced rollers rotatably se
cured to the article-holding member and received by
said elongated slot,
(h) said additional pair of spaced rollers, said top pair 20
of rollers and said bottom pair of rollers all being
positioned in the same plane,
(i) -a substantially V-shaped truncated annular recess
in the periphery of each of :all said rollers with the 25
plane of truncation providing a contact surface,
(j) said track member having its upper and lower sur
bottom pair of rollers respectively,
(k) said elongated slot -having its upper and lower sur
faces formed with convergently sloping sides received
within said recesses in said additional pair of rollers,
(l) said upper and lower surfaces of said track member
and said upper and lower surfaces of said elongated
slot each having a flat portion arranged to bear
against the contact surfaces of its respective said
annular recess,
(m) said track member being formed of molded mate
rial made up of two like sections which come together
at the top and bottom and lare subjected to irregular
flashing along said ñat portion of said track member
»at their junction -line at their center, and
(n) a small peripheral groove provided at the center of
the contact surface of each of said rollers adapted to
receive said irregular ñashing.
References Cited in the file of this patent
Hamilton ____________ __ Dec. 22, 1896
Snook ______________ __ Nov. 19, 1901
France ______________ __ May 10, 1910
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