CA1092385A - Double acting agitator with rigid, curved end vanes - Google Patents
Double acting agitator with rigid, curved end vanesInfo
- Publication number
- CA1092385A CA1092385A CA310,470A CA310470A CA1092385A CA 1092385 A CA1092385 A CA 1092385A CA 310470 A CA310470 A CA 310470A CA 1092385 A CA1092385 A CA 1092385A
- Authority
- CA
- Canada
- Prior art keywords
- agitator
- skirt
- axis
- vanes
- vane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
"DOUBLE ACTING AGITATOR WITH RIGID, CURVED END VANES"
ABSTRACT OF THE DISCLOSURE
Agitator vanes standing on a lower oscillating portion of an agitator of the double acting type, having an upper, unidirectionally-rotating portion with a helical auger vane thereon, are connected along their lengths to a skirt of the lower portion and are curved at their out-ward ends in the direction of rotation of the upper portion of the agitator. The curve in each of the vane ends greatly reduces any tangling of or damage to clothes despite the one-way rotation of the upper portion of the agitator in the wash liquid and in contact with the articles being wash-ed.
ABSTRACT OF THE DISCLOSURE
Agitator vanes standing on a lower oscillating portion of an agitator of the double acting type, having an upper, unidirectionally-rotating portion with a helical auger vane thereon, are connected along their lengths to a skirt of the lower portion and are curved at their out-ward ends in the direction of rotation of the upper portion of the agitator. The curve in each of the vane ends greatly reduces any tangling of or damage to clothes despite the one-way rotation of the upper portion of the agitator in the wash liquid and in contact with the articles being wash-ed.
Description
BACKGROUND OF THE INVENTION
_ _ ~
1. Field of the Invention The present invention relates to washing machinesof the vertical axis type having double acting agitators for insuring toroidal movement of the wash load in the machine.
_ _ ~
1. Field of the Invention The present invention relates to washing machinesof the vertical axis type having double acting agitators for insuring toroidal movement of the wash load in the machine.
2. The Prior Art A double acting agitator with a unidirectionally rotating auger agitator element above an oscillating agitator element therebelow has been disclosed in the Ruble Patent
3,987,652 and the Platt Patents 3,987,651 and 3,987,508, all assigned to the same assignee as the present invention.
These patents disclose that the desirable toroidal rollover;
pattern of wash liquid and articles to be washed within a, washing machine clothes receptacle can be greatly improved, especially in the presence of very heavy wash loads, by .....
- ' ~
~O9Z3~5 augering the articles downwardly along the centPr of the clothes basket and into the area swept by oscillating vanes on the lower portion o the agitator at a skirt.
While the double acting agitators have proven ~
very effective, they can tend to rot:ate the clothes load ~-within the basket about the axis of the machine. Such net rotation can lead to tangling of the clothes. A U.S. Patent ~-No. 4,048,820 issued on September 20 1977 to Pielemeier, also assigned to the assignee of the present invention, discloses 10 the use of ramped scrubbing vanes on the lower agitator -~
portion to eliminate such rotation. The ramps on the vanes extend between upper edges of the scrubbing vanes and portions ~ -of the skirt in the direction of rotation of the auger portion.
SUMM~RY OF THE INVENTION
_ _ _ _ ,: . . .
:; ~ :;.
A double acting agitator having an upper, uni-, . .
directionally rotating auger portion and a lower oscillating i~
portion has rigid vanes on the skirt of the lower portion, ;
the outward ends of which are curved in the direction of rotation of the auger portion. The cur~ed vane ends affect-ively eliminate or reduce tangling of clothes in the washer induced by the one-way rotation of the auger.
More specifically, the invention provides in an auto~
matic washing machine of the vertical axis type hav mg a uni~
directionally rotating upper auger element and a lower ; `
oscillating element coaxial therewith having upstanding vanes carried on a skirt portion thereof, said vanes extending -radially outwar~ly from the center post portion of the lower -oscillating element, the improvement comprising: each of said vanes extendlng outwardly onto an~outward portion of the skirt from the inner portion of the skirt and having a curve therein in the direction of the rotation of the ~' -.
:
O ~ ~ 3 ~ 5 rotating auger element.
The invention can also be defined as an agitator assembly for a vertical axis automatic washing machine~ the assembly comprising: a lower agitator element mounted for oscillation about said axis and having a center post and a lower skirt; a upper agitator element mounted about said axis upwardly adjacent the lower agitator element and in coaxial relation therewith; means associated with the upper agitator element for urging articles suspended in wash liquid adjacent thereto in a downward direction; drive means for oscillating the lower agitator element about the axis and foT rotating the upper agitator e'ement in-one direction about said axis; ;~
and a plurality of vanes carried on said skirt portion of the lower agitator element and extending upwardly therefrom and radially outwardly from said center post, each said vane ~
having a radially outwardmost portion curved in the direction ~;
of rotation of the upper agitator element.
The invention also consists of an automatic washing - machine of the vertical axis type comprising: a two-part, ~ -20- double acting agitator mounted about said axis and comprising, an upper par~ having ahelical auger vane thereon and being ~
unidirectionally rotatable on said axis, and a lower part ~-having a generally conical skirt portion and at least two up-standing scrubbing vanes carried on said skirt portion; and drive means for driving said upper part of said agitator in said unidirectional rotation and oscillating said lower part;
and wherein each of said scrubbing vanes extends radially from the inner portion of the skirt and is curved in the direction of rotation of the upper part of the agitator along the outer portion of the skirt to a vane end.
' 'j - ' ' THE DRAWINGS
Figure 1 i5 a prespective view of a washing machine with portions of the cabinet cut away to show the wash receptacle, agitator, and other internal parts thereof.
Figure 2 is a top, partly in section, plan view of an agitator and surrounding tub and basket.
Figure 3 is a side viewr partly in section on line III-III of Figure 2, of the washing machine agitator of the ,: .. , .. ~ . ...
;., ,.:' :~
.'.,~ ,' ., .~ ' . ,:
~' :
.
:: : ' : -`'' - 2b ~
3~
present invention and related parts.
Figure 4 is a side elevational view of the agitator of the invention.
T~IE PREFERRED ~MBODIMENTS
_ .
A washing machine 10 of the automatic, vertical axis type is shown generally in Figure 1, comprising a cabinet 11 having a hinged lid 12 for permittinq access to the lnterior of the machine 10. Within khe cabinet 11 is an imperforate fluid retaining tub 13 and a perforate washing receptacle or basket 14 mounted coaxially therewithin.
An agitator assembly 15 is mounted coaxially with the tub 13 and the basket 14 within the machine 10. The agitator comprises an upper auger element 16 having an upstanding barrel portion 17 and a helical vane 18 extend-- ing outwardly therefrom, and a lower agitator element 19 having a center post portion 20, a generally conically descending skirt portion 21 extending outwardly from the lower portion of the post 20, and a plurality of upstanding vanes 22 carried on the skirt portion 21.
A drive means 23 comprises a motor and related pulleys and belts for drivlng a shaft 24 in deslred oscillatory and rotational movements about the machine axis for carry-ing out the washing, rinsing and spinning functions of the agitator 15 and basket 14. During the washing cycles, the drive shaft 24 is oscillated about a vertical axis 25 of the machine to drlve the lower agltator portion 19 in correspond-ing oscillations in directions 26 and 27 successively.
~ The vanes 22 are thus osoillated through the lower portion of the basket 14 for scrubbing articles~suspended in wash fluid within the tub 13 and the basket 14 and to ` ~9Z385 direct the articles outwardly therein. The drive shaft 24 also rotates the auger element 16 in a unidirectional rotation 28 as described in U.S. Patents 3,987,508 and 3,987,651. ~ one-way ratchet clu-tch assembly such as that shown in Figure 4 of U.S. Patent 3,987,652 is employed for converting the oscillatory motion of the shaft 24 into the unidirectional rotation desired.
Such unidirectional rotation in the direction 28 in the configuration shown urges wash liquid and articles of clothing ad~acent the barrel portlon 17 downwardly along the upper auger element 16 and into the paths of the vanes 22. ~s disclosed in the prior patents cited, such double acting agitation is surprisingly effective in achieving toroidal rollover of even heavily packed loads of laundry within the basket 14.
In accordance with the principles of the invention, the vanes 22 carried on the upper portion of the skirt 21 have end portions 30 which are curved in the direction of rotation of the upper auger element 16. As shown in the draw-ing figures, each vane 22 extends from a radially i~nward-most portion 35 at the lower agitator center post 20 and ::
radially outwardly through a middle or center portion 36 and then into the curved portion 30 to a terminal end 37 spaced somewhat radially inwardly from a periphery 38 of~the agitator skirt 21. Each curved~portion 30 has an axis of curvature 39 as shown in Figure 2 which is vertical and~
parallel to the axis 25 of the agitator assembly 15 but ofset radially~therefrom.
The configuration of each vane 22 is defined by an upward edge 40 thereof and a height dimension H between 3~5 the outwardly descending upper surface of the skirt 21 and such edge ~0 of the vane 22. The heiyht H of each vane 22 is constant over the center portion 36, but is somewhat greater at the radially inwardly portion 35. The height H decreases throuyh the curve 30 at the end of each vane.
Also, in the preferred en~odiment vanes 2~ are attached to the skirt portion21 along their entire radial extent. Such continuous attachment makes the vanes rigid and substantially improves the washing efficiency of the assembly.
In operation, once the tub 13 is filled with wash liquid and the basket 14 with articles to be laundered, the drive means 23 is actuated and the drive shaft 24 begins its oscillatory movement. The lower agitator element 19 oscillates directly with the drive shaft 24 in the directions of the arrows 26, 27. Simultaneously, the upper auger element 16 rotates stepwise in the direction 28.
Movement of the helical vane 18 augers articles being laundered downwardly adjacent the barrel portion 17 in the center of the basket 14, while the vanes 22 both beat or scrub the articles and direct them outwardly from th;e center post 20. ~Toroidal motion continues upwardly along the outer wall of the basket 14 and inwardly alon~ the surface of the washing liquid. Action of the upper auger element 16 and the lower element 19 thus creates the desirable toroidal rollover in the wash llquid and articles therein throughout the volume of the washing basket 14.
The unidirectional rotat1on of~the upper auger element 16 tends, however, to induce a net rotation of the ~(~9Z3~5 .
wash liquid about -the axis 25 of the assembly within the basket 14. Such net rotation of the wash liquid can cause objectionable tangling and even damage to the clothes, together with higher torque requirements in the drive means 23. However, the curvature of the vanes 22 at their outward ends 30 greatly reduces the tanyling, clothes damage, and high motor torque problems. The vane curvature appears to provide an increased outward thrust on the wash liquid upon oscillations in the direction 27 opposite the rotational direction 28 of the auger element, offsetting the net liquid rotation otherwise induced by the auger element.
Although various minor modifications may be suggested by those versed in the art, it should be under-stood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.
' ..
; ' .~.
..
...... ~ . . .
.
These patents disclose that the desirable toroidal rollover;
pattern of wash liquid and articles to be washed within a, washing machine clothes receptacle can be greatly improved, especially in the presence of very heavy wash loads, by .....
- ' ~
~O9Z3~5 augering the articles downwardly along the centPr of the clothes basket and into the area swept by oscillating vanes on the lower portion o the agitator at a skirt.
While the double acting agitators have proven ~
very effective, they can tend to rot:ate the clothes load ~-within the basket about the axis of the machine. Such net rotation can lead to tangling of the clothes. A U.S. Patent ~-No. 4,048,820 issued on September 20 1977 to Pielemeier, also assigned to the assignee of the present invention, discloses 10 the use of ramped scrubbing vanes on the lower agitator -~
portion to eliminate such rotation. The ramps on the vanes extend between upper edges of the scrubbing vanes and portions ~ -of the skirt in the direction of rotation of the auger portion.
SUMM~RY OF THE INVENTION
_ _ _ _ ,: . . .
:; ~ :;.
A double acting agitator having an upper, uni-, . .
directionally rotating auger portion and a lower oscillating i~
portion has rigid vanes on the skirt of the lower portion, ;
the outward ends of which are curved in the direction of rotation of the auger portion. The cur~ed vane ends affect-ively eliminate or reduce tangling of clothes in the washer induced by the one-way rotation of the auger.
More specifically, the invention provides in an auto~
matic washing machine of the vertical axis type hav mg a uni~
directionally rotating upper auger element and a lower ; `
oscillating element coaxial therewith having upstanding vanes carried on a skirt portion thereof, said vanes extending -radially outwar~ly from the center post portion of the lower -oscillating element, the improvement comprising: each of said vanes extendlng outwardly onto an~outward portion of the skirt from the inner portion of the skirt and having a curve therein in the direction of the rotation of the ~' -.
:
O ~ ~ 3 ~ 5 rotating auger element.
The invention can also be defined as an agitator assembly for a vertical axis automatic washing machine~ the assembly comprising: a lower agitator element mounted for oscillation about said axis and having a center post and a lower skirt; a upper agitator element mounted about said axis upwardly adjacent the lower agitator element and in coaxial relation therewith; means associated with the upper agitator element for urging articles suspended in wash liquid adjacent thereto in a downward direction; drive means for oscillating the lower agitator element about the axis and foT rotating the upper agitator e'ement in-one direction about said axis; ;~
and a plurality of vanes carried on said skirt portion of the lower agitator element and extending upwardly therefrom and radially outwardly from said center post, each said vane ~
having a radially outwardmost portion curved in the direction ~;
of rotation of the upper agitator element.
The invention also consists of an automatic washing - machine of the vertical axis type comprising: a two-part, ~ -20- double acting agitator mounted about said axis and comprising, an upper par~ having ahelical auger vane thereon and being ~
unidirectionally rotatable on said axis, and a lower part ~-having a generally conical skirt portion and at least two up-standing scrubbing vanes carried on said skirt portion; and drive means for driving said upper part of said agitator in said unidirectional rotation and oscillating said lower part;
and wherein each of said scrubbing vanes extends radially from the inner portion of the skirt and is curved in the direction of rotation of the upper part of the agitator along the outer portion of the skirt to a vane end.
' 'j - ' ' THE DRAWINGS
Figure 1 i5 a prespective view of a washing machine with portions of the cabinet cut away to show the wash receptacle, agitator, and other internal parts thereof.
Figure 2 is a top, partly in section, plan view of an agitator and surrounding tub and basket.
Figure 3 is a side viewr partly in section on line III-III of Figure 2, of the washing machine agitator of the ,: .. , .. ~ . ...
;., ,.:' :~
.'.,~ ,' ., .~ ' . ,:
~' :
.
:: : ' : -`'' - 2b ~
3~
present invention and related parts.
Figure 4 is a side elevational view of the agitator of the invention.
T~IE PREFERRED ~MBODIMENTS
_ .
A washing machine 10 of the automatic, vertical axis type is shown generally in Figure 1, comprising a cabinet 11 having a hinged lid 12 for permittinq access to the lnterior of the machine 10. Within khe cabinet 11 is an imperforate fluid retaining tub 13 and a perforate washing receptacle or basket 14 mounted coaxially therewithin.
An agitator assembly 15 is mounted coaxially with the tub 13 and the basket 14 within the machine 10. The agitator comprises an upper auger element 16 having an upstanding barrel portion 17 and a helical vane 18 extend-- ing outwardly therefrom, and a lower agitator element 19 having a center post portion 20, a generally conically descending skirt portion 21 extending outwardly from the lower portion of the post 20, and a plurality of upstanding vanes 22 carried on the skirt portion 21.
A drive means 23 comprises a motor and related pulleys and belts for drivlng a shaft 24 in deslred oscillatory and rotational movements about the machine axis for carry-ing out the washing, rinsing and spinning functions of the agitator 15 and basket 14. During the washing cycles, the drive shaft 24 is oscillated about a vertical axis 25 of the machine to drlve the lower agltator portion 19 in correspond-ing oscillations in directions 26 and 27 successively.
~ The vanes 22 are thus osoillated through the lower portion of the basket 14 for scrubbing articles~suspended in wash fluid within the tub 13 and the basket 14 and to ` ~9Z385 direct the articles outwardly therein. The drive shaft 24 also rotates the auger element 16 in a unidirectional rotation 28 as described in U.S. Patents 3,987,508 and 3,987,651. ~ one-way ratchet clu-tch assembly such as that shown in Figure 4 of U.S. Patent 3,987,652 is employed for converting the oscillatory motion of the shaft 24 into the unidirectional rotation desired.
Such unidirectional rotation in the direction 28 in the configuration shown urges wash liquid and articles of clothing ad~acent the barrel portlon 17 downwardly along the upper auger element 16 and into the paths of the vanes 22. ~s disclosed in the prior patents cited, such double acting agitation is surprisingly effective in achieving toroidal rollover of even heavily packed loads of laundry within the basket 14.
In accordance with the principles of the invention, the vanes 22 carried on the upper portion of the skirt 21 have end portions 30 which are curved in the direction of rotation of the upper auger element 16. As shown in the draw-ing figures, each vane 22 extends from a radially i~nward-most portion 35 at the lower agitator center post 20 and ::
radially outwardly through a middle or center portion 36 and then into the curved portion 30 to a terminal end 37 spaced somewhat radially inwardly from a periphery 38 of~the agitator skirt 21. Each curved~portion 30 has an axis of curvature 39 as shown in Figure 2 which is vertical and~
parallel to the axis 25 of the agitator assembly 15 but ofset radially~therefrom.
The configuration of each vane 22 is defined by an upward edge 40 thereof and a height dimension H between 3~5 the outwardly descending upper surface of the skirt 21 and such edge ~0 of the vane 22. The heiyht H of each vane 22 is constant over the center portion 36, but is somewhat greater at the radially inwardly portion 35. The height H decreases throuyh the curve 30 at the end of each vane.
Also, in the preferred en~odiment vanes 2~ are attached to the skirt portion21 along their entire radial extent. Such continuous attachment makes the vanes rigid and substantially improves the washing efficiency of the assembly.
In operation, once the tub 13 is filled with wash liquid and the basket 14 with articles to be laundered, the drive means 23 is actuated and the drive shaft 24 begins its oscillatory movement. The lower agitator element 19 oscillates directly with the drive shaft 24 in the directions of the arrows 26, 27. Simultaneously, the upper auger element 16 rotates stepwise in the direction 28.
Movement of the helical vane 18 augers articles being laundered downwardly adjacent the barrel portion 17 in the center of the basket 14, while the vanes 22 both beat or scrub the articles and direct them outwardly from th;e center post 20. ~Toroidal motion continues upwardly along the outer wall of the basket 14 and inwardly alon~ the surface of the washing liquid. Action of the upper auger element 16 and the lower element 19 thus creates the desirable toroidal rollover in the wash llquid and articles therein throughout the volume of the washing basket 14.
The unidirectional rotat1on of~the upper auger element 16 tends, however, to induce a net rotation of the ~(~9Z3~5 .
wash liquid about -the axis 25 of the assembly within the basket 14. Such net rotation of the wash liquid can cause objectionable tangling and even damage to the clothes, together with higher torque requirements in the drive means 23. However, the curvature of the vanes 22 at their outward ends 30 greatly reduces the tanyling, clothes damage, and high motor torque problems. The vane curvature appears to provide an increased outward thrust on the wash liquid upon oscillations in the direction 27 opposite the rotational direction 28 of the auger element, offsetting the net liquid rotation otherwise induced by the auger element.
Although various minor modifications may be suggested by those versed in the art, it should be under-stood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.
' ..
; ' .~.
..
...... ~ . . .
.
Claims (7)
1. An agitator assembly for a vertical axis automatic washing machine, the assembly comprising:
a lower agitator element mounted for oscillation about said axis and having a center post and a lower skirt;
a upper agitator element mounted about said axis upwardly adjacent the lower agitator element and in coaxial relation therewith;
means associated with the upper agitator element for urging articles suspended in wash liquid adjacent thereto in a downward direction;
drive means for oscillating the lower agitator element about the axis and for rotating the upper agitator element in one direction about said axis; and a plurality of vanes carried on said skirt portion of the lower agitator element and extending upwardly therefrom and radially outwardly from said center post, each said vane having a radially outwardmost portion curved in the direction of rotation of the upper agitator element.
a lower agitator element mounted for oscillation about said axis and having a center post and a lower skirt;
a upper agitator element mounted about said axis upwardly adjacent the lower agitator element and in coaxial relation therewith;
means associated with the upper agitator element for urging articles suspended in wash liquid adjacent thereto in a downward direction;
drive means for oscillating the lower agitator element about the axis and for rotating the upper agitator element in one direction about said axis; and a plurality of vanes carried on said skirt portion of the lower agitator element and extending upwardly therefrom and radially outwardly from said center post, each said vane having a radially outwardmost portion curved in the direction of rotation of the upper agitator element.
2. An agitator assembly as defined in claim 1, wherein the vanes are rigid and are attached to the skirt portion over their entire lengths.
3. In an automatic washing machine of the vertical axis type having a unidirectionally rotating upper auger element and a lower oscillating element coaxial therewith having upstanding vanes carried on a skirt portion thereof, said vanes extending radially outwardly from the center post portion of the lower oscillating element, the improvement comprising:
each of said vanes extending outwardly onto an outward portion of the skirt from the inner portion of the skirt and having a curve therein in the direction of the rotation of the rotating auger element.
each of said vanes extending outwardly onto an outward portion of the skirt from the inner portion of the skirt and having a curve therein in the direction of the rotation of the rotating auger element.
4. In an automatic washing machine, the improve-ment of claim 3, wherein the vanes terminate inwardly of a peripheral portion of the skirt.
5. An automatic washing machine of the vertical axis type comprising:
a two-part, double acting agitator mounted about said axis and comprising;
an upper part having a helical auger vane thereon and being unidirectionally rotatable on said axis, and a lower part having a generally conical skirt portion and at least two upstand-ing scrubbing vames carried on said skirt portion; and drive means for driving said upper part of said agitator in said unidirectional rotation and oscillating said lower part; and wherein each of said scrubbing vanes extends radially from the inner portion of the skirt and is curved in the direction of rotation of the upper part of the agitator along the outer portion of the skirt to a vane end.
a two-part, double acting agitator mounted about said axis and comprising;
an upper part having a helical auger vane thereon and being unidirectionally rotatable on said axis, and a lower part having a generally conical skirt portion and at least two upstand-ing scrubbing vames carried on said skirt portion; and drive means for driving said upper part of said agitator in said unidirectional rotation and oscillating said lower part; and wherein each of said scrubbing vanes extends radially from the inner portion of the skirt and is curved in the direction of rotation of the upper part of the agitator along the outer portion of the skirt to a vane end.
6. An automatic washing machine as defined in claim 5, wherein each said scrubbing vane has a top edge and a varying vertical height defined between the skirt portion and each part of said top edge, said height being constant at a middle portion of the skirt, greater at an inwardmost portion of the skirt, and wherein the height decreases along said curved portion.
7. An automatic washing machine as defined in claim 5, wherein the curved portion of each vane end has an axis of curvature which is vertical and is offset from the agitator axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA310,470A CA1092385A (en) | 1978-08-31 | 1978-08-31 | Double acting agitator with rigid, curved end vanes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA310,470A CA1092385A (en) | 1978-08-31 | 1978-08-31 | Double acting agitator with rigid, curved end vanes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1092385A true CA1092385A (en) | 1980-12-30 |
Family
ID=4112267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA310,470A Expired CA1092385A (en) | 1978-08-31 | 1978-08-31 | Double acting agitator with rigid, curved end vanes |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1092385A (en) |
-
1978
- 1978-08-31 CA CA310,470A patent/CA1092385A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |