U.S. patent number 3,594,058 [Application Number 04/817,033] was granted by the patent office on 1971-07-20 for rack assembly for front-loading dishwasher.
This patent grant is currently assigned to General Electric Company. Invention is credited to Melvin R. Kauffman.
United States Patent |
3,594,058 |
Kauffman |
July 20, 1971 |
RACK ASSEMBLY FOR FRONT-LOADING DISHWASHER
Abstract
In a front-loading dishwashing machine of the type having a
front access opening to a washing chamber, and dish-supporting
racks that may be manually slid outwardly from the chamber and
through the access opening to facilitate loading of the machine
with soiled tableware, a means is provided whereby when one
dish-supporting rack is manually pulled outwardly to extend from
the front of the dishwashing machine, another rack positioned at a
different horizontal level is caused to move outwardly without the
need for the operator of the machine to separately grasp the second
rack and pull it outward through the access opening. It is also
provided, when the dish-supporting racks are in their normal
operating position, within the washing chamber, that the second
rack may be manually moved outwardly independent the first rack, if
so desired. The construction of the invention is particularly
applicable to a dishwashing machine wherein upper and lower level
racks are spaced substantially distant from one another within the
wash chamber so that large or cumbersome articles can be
conveniently stored for washing in the lower level rack.
Inventors: |
Kauffman; Melvin R.
(Louisville, KY) |
Assignee: |
General Electric Company
(N/A)
|
Family
ID: |
25222215 |
Appl.
No.: |
04/817,033 |
Filed: |
April 17, 1969 |
Current U.S.
Class: |
312/298;
312/334.13 |
Current CPC
Class: |
A47L
15/507 (20130101) |
Current International
Class: |
A47L
15/50 (20060101); E04b (); A47b 088/00 (); A47b
095/00 () |
Field of
Search: |
;312/271,273,275,298,299,301,308,330,294,338,350,127 ;49/103
;270/19 ;126/340 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Franklin; Jordan
Assistant Examiner: Larkin; Geo. V.
Claims
I claim:
1. In a dishwashing machine of the type having top, bottom and
sidewalls defining an inside washing chamber, and an access opening
through one of the sidewalls, an improved rack assembly for
supporting articles to be washed within the chamber,
comprising:
a. a lower rack mounted within a lower portion of the chamber and
slidable outwardly in a substantially horizontal plane through the
access opening;
b. an upper rack mounted above said lower rack, said upper rack
vertically spaced substantially distant from said lower rack and
slidable outwardly in a substantially horizontal plane through the
access opening; and
c. push means mounted on one of said racks and actuated by manual
sliding of one of said racks and operable to cause the other of
said racks to slide outwardly through the access opening.
2. The combination set forth in claim 1, wherein:
said push means comprises a downward extending portion of said
upper rack that acts to engage a portion of said lower rack and
urges said lower rack outwardly when said upper rack is manually
moved outwardly through the access opening.
3. The combination of claim 2 wherein:
said push means disengages from said lower rack when said upper
rack is manually retracted back through the access opening.
4. The combination set forth in claim 1 wherein:
a. said push means comprises an armlike downward projection
extending from said upper rack; and
b. a portion of said projection intersects the plane of movement of
said lower rack.
5. The combination set forth in claim 1, wherein:
said lower rack is slidable inwardly and outwardly independent of
said upper rack, and said upper rack is inwardly slidable
independent of said lower rack.
6. The combination set forth in claim 1, wherein:
a. said upper rack comprises a left section and a right
section;
b. each of said sections is separately supported for slidable
movement independent of each other; and
c. said push means operates to urge said lower rack to slide
outwardly when either of said sections is manually slid outwardly
through the access opening.
7. The combination set forth in claim 6, wherein:
said push means is disengaged from said lower rack when both of
said sections are in their retracted position within the wash
chamber whereby said lower rack is independently slidable relative
to said sections.
8. In an automatic dishwasher of the type including a cabinet
having top, bottom and sidewalls and an access opening in one of
the sidewalls, an improved rack assembly for supporting articles to
be washed within the cabinet; comprising:
a. a lower rack positioned within a lower portion of the cabinet
for substantially horizontal movement through the access
opening;
b. support means for supporting a plurality of generally
side-by-side removable upper racks selectively at different
elevations above said lower rack for substantially horizontal
sliding movement through the access opening independent of said
lower rack and one another; and
c. means extending downwardly from said support means for
contacting said lower rack and causing said lower rack to move
outwardly through the access opening when one of said upper racks
is moved outwardly through the access opening.
9. The combination set forth in claim 8 wherein said support means
comprises a plurality of generally side-by-side open frames, and
each of said frames has a downward projecting member integral to
the rear portion thereof, said downward projecting member has a
lower end portion thereof intersecting the plane of movement of
said lower rack at the back end of said lower rack whereby, when
either of said frames is caused to move outwardly through the
access opening, the downward-projecting member contacts the back
end of said lower rack and causes said lower rack to move outwardly
in unison with said frame.
10. The combination set forth in claim 8 wherein said lower rack is
slidable inwardly and outwardly independent of said upper rack, and
said upper rack is inwardly slidable independent of said lower
rack.
Description
BACKGROUND OF THE INVENTION
This invention broadly relates to an improved rack assembly for a
front-loading dishwasher utilizing dish supporting racks mounted to
be horizontally slidable so as to extend outwardly through a front
access opening to enable soiled tableware to be conveniently placed
in the racks for washing.
More particularly, the invention relates to an improvement for both
a conventional rack assembly such as presently used in
front-loading dishwashers where upper and lower racks are
independently slidably mounted in the machine's wash chamber, and
for a more sophisticated rack arrangement wherein separately
supported vertically adjustable side-by-side racks constitute the
upper rack level, such as described in the U.S. Pat. issued Sept.
9, 1969 to Melvin R. Kauffman and Wesley S. Pattison, U.S. Pat. No.
3,466,109 entitled "Front Opening Dishwasher With Improved Rack
Assembly" and assigned to the General Electric Company, the
assignee of the present invention.
An object of the present invention is to provide means by which a
housewife operating a front-loading dishwasher can manually slide
the racks located on different levels outwardly from the machine's
washing chamber by a simple one-hand motion.
Another object of this invention is to provide a simplified means
of manually imparting a unitary sliding action to a pair of
vertically spaced apart racks in a dishwasher while allowing for
independent horizontal manual sliding of each rack on its own
slidable support means, as desired by the operator.
SUMMARY OF THE INVENTION
In a presently preferred form of the invention, push means is
provided, in a front-loading automatic dishwasher, on each of a
pair of side-by-side separately slidable upper racks whereby manual
withdrawal of either of the upper racks will cause a substantially
larger lower rack to move outwardly in unison with the withdrawn
upper rack. In this embodiment of the invention, the lower rack may
be freely independently moved inwardly or outwardly with respect to
the washing chamber when the upper pair of racks are positioned
entirely within the washing chamber, and either of the upper racks
may be independently manipulated on its slide support means so long
as the lower rack is in its outward position with respect to the
washing chamber.
In a second modified form of the invention, a conventional
independently slidable single upper rack may be provided with push
means to engage a lower rack and cause the lower rack to move
outwardly in unison with the upper rack. In this form, each of the
racks has a horizontal cross-sectional area substantially the same
as that of the washing chamber, and the lower rack is free to be
manipulated horizontally inwardly or outwardly on its independent
support means, without engagement with the upper rack, so long as
the upper rack is permitted to remain in its normal operating
position within the upper portion of the washing chamber. When the
lower rack is in its outwardly extended position with respect to
the washing chamber, then the upper rack may be freely
independently moved inwardly or outwardly without engagement with
the lower rack.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front elevational view of an automatic dishwasher,
partly cut away to show details of its internal construction;
and
FIG. 2 is a side elevational view of the dishwasher first
illustrated in FIG. 1, here shown with sidewall portions cut away
to reveal various internal components as they are disposed to
facilitate loading of the dishwashing machine.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Illustrated in FIG. 1 is an automatic dishwasher having an outer
housing or cabinet 10 comprised of a top side or inner upper
sidewall 11, a rear wall 12, and opposite sidewalls 13 and 14. The
interior of the cabinet 10 is divided by a bottom chamber wall or
wash chamber floor 15 into an upper area or washing chamber 16 and
a lower motor-pump assembly area 17. Across the lower front side of
the cabinet 10 is a front lower panel 18 that serves a front side
of the motor-pump assembly area 17. The upper portion of the front
side of the cabinet 11 is a door 19 provided with hinges 21 (see
FIG. 2) at its lower end so that it may be opened from its closed
vertical position to a substantially horizontal orientation to
permit access to the washing chamber 16 through a front access
opening 20.
In the area 17 in the lower end of the cabinet 11 is housed a
motor-pump assembly 25 having a pedestal 26 extending upwardly
therefrom through an opening in the wash chamber floor 15 for
supporting a rotatable reactive-type spray arm 27. The wash chamber
floor 15 has a second opening therethrough leading to a sump 28 for
the purpose of drainage and recirculation of washing liquid between
the wash chamber 16 and the motor-pump assembly 25.
The apparatus heretofore described is considered representative of
conventional dishwashers and the present invention is not intended
to be limited to such construction. It is intended that the
dishwasher may be modified or provided with additional equipment
other than that which is shown without restricting the present
invention.
Within the washing chamber 16 of the cabinet 10, as illustrated in
FIG. 1, a lower rack 30 is adapted to be slidable horizontally
outwardly through the access opening 20 over the open door 19. The
rack 30 is constructed of interconnected vertical and horizontal
rodlike members or rigid wires that form the general configuration
of a shallow four-sided basket for receiving soiled tableware to be
washed in the washing chamber 16. The rack 30 thus comprises a
floor portion 31 having a front fence 32, a rear fence 33 and
opposed side fences 34 extended upwardly from the edge of the floor
portion 31. The horizontal cross-sectional area of the rack 30 is
substantially equal to that of the washing chamber 16. The lower
rack 30 is also provided with lower edge side rollers 36 that rest,
when the lower rack 30 is in its operating position within the
washing chamber 16, on ridgelike tracks or horizontal surfaces 37
formed on opposite inside surfaces of the respective sidewalls 13
and 14 of the cabinet 10. Parallel spaced apart indentations or
tracks 38 are provided on the inner surface of the door 19, and are
aligned with the corresponding ridges 37, when the door 19 is in
its open position, to form continuous tracks along which the rack
30 may be drawn outwardly to rest with its forward end on the door
19. The outward-sliding movement of the rack 30 is usually
accomplished by the operator of the machine who, after having
opened the door 19, grasps the rack 30 by placing the hand on the
front fence 32 and pulling the rack 30 out over the door 19.
Situated in the upper region of the washing chamber 16 and spaced
substantially apart from the lower rack 30 is a support means
preferably including a pair of slidably supported side-by-side
frames or rack supporting sections 41, each of which carries an
upper rack 47 removably attached thereto. Each of the open frames
41 has the general configuration of a plane rigid rectangle having
front and rear parallel frame rails 42 connecting opposed side
rails 43.
The outer edge of each of the frames 41 is supported for slidable
movement, on the inner surface of the cabinet sidewalls 13 and 14,
by means of separate roller assemblies 50. As illustrated in FIG.
2, each roller assembly 50 comprises four rollers 51 group mounted
on the inner surfaces of each cabinet wall 13 or 14 and properly
spaced to slidably support a slide bar 53 for substantially
horizontal sliding movement between upper and lower pairs of the
rollers 51. The slide bar 53 is provided with longitudinally
disposed forward and rearward horizontally aligned slots 54, each
of which acts as a trackway for a rack roller 52 journaled to the
outer edge portion or outer side rail of the rack 41.
A roller assembly 60 supports the inner edges of the respective
racks 41, as illustrated in FIG. 1. The roller assembly 60
comprises a rigid hanger plate 61 having one end thereof attached
to the inner upper sidewall or top 11 of the cabinet 10, with
rollers 62 and 63 journaled at the lowermost end of the hanger 61
for rotation on respective horizontal axes. The inner edge of each
frame 41 is carried between the upper roller 62 and the lower
roller 63 for movement of the frame 41 inwardly and outwardly with
respect to the washing chamber 16.
Each upper rack 47 is carried on its frame 41 by means of a pair of
clips 56 integral to the forward edge or front rail 42 of the frame
41, and hooks 57 integral to the rearward edge or rear rail 42 of
the frame 41. Each upper rack 47 is vertically adjustable with
respect to its supporting frame 41, inasmuch as each rack 47 may be
disengaged from clips 56 and hooks 57 and repositioned so that the
clips 56 and hooks 57 attach to other horizontally disposed side
rails of the forward and rear fences of the rack 43.
A rigid armlike push bar 46 is provided at the rearward edge of
each frame 41 to act as a push means for imparting sliding movement
to the lower rack 30 when the frame 41 is caused to slide outwardly
through the access opening 20. As illustrated in FIG. 1, each push
bar 46 may be formed of two leg portions the upper ends of which
are fixedly joined to the rear edge of the frame 41 and the lower
ends of which unite in a smoothly curved configuration that extends
downwardly behind the rear fence portion 33 of the lower rack
30.
From the foregoing description of the various elements shown in the
accompanying drawings, it will be seen that utilization of a push
means such as the push bars 46 provides an added convenience in
that manual withdrawal of an upper rack 47 through the access
opening 20 of the dishwasher serves the dual purpose of withdrawing
both the upper rack 47 and the lower rack 30 to their outwardly
extended position over the open front door 19 of the machine to
facilitate front loading.
With the lower rack 30 in its outward loading position, the upper
racks 47 are freely maneuverable and may be pushed back to the
retracted position within the washing chamber 16 to give
unobstructed access to the open top of the lower rack 30.
In addition to the preferred form shown in the drawings, it is
intended that the push means be applicable to the more conventional
rack arrangement wherein a lower rack having a horizontal cross
section substantially the same as that of the washing chamber is
utilized along with a single independently slidably mounted upper
rack having a horizontal cross-sectional area substantially equal
to that of the lower rack.
It is considered evident from the foregoing description that
certain aspects of the invention are not limited to the particular
construction of the specific example or embodiment illustrated. It
should be understood that various modifications may be made
therein, and it is intended that the appended claims cover all such
modifications as fall within the true spirit and scope of the
invention.
* * * * *