Remote powder detergent dispenser

• US 4,020,865 A
• Filed: 10/03/1975
• Issued: 05/03/1977
• Est. Priority Date: 10/03/1975
• Status: Expired due to Term

• Current Assignee: Economics Laboratory Inc (Ecolab, Inc.)
• Original Assignee: Economics Laboratory Inc (Ecolab, Inc.)
• Inventors: Nystuen, David L., Moffat, Robert B., Imdieke, Thomas H.
• Primary Examiner(s): Cohan, Alan
• Application Number:
  US05/619,530
• Time in Patent Office: 578 Days
• Field of Search: 137/268, 137/88, 222/67, 23/271, 23/267 E, 23/269, 23/272.7, 23/272.8, 340/244, 307/252
• US Class Current: 137/268
• CPC Class Codes: A47L 15/4436 in the form of a detergent solution made by gradually dissolving a powder detergent cake or a solid detergent block
• CPC Class Codes: B01F 21/22 using additional holders in conduits, containers or pools for keeping the solid material in place, e.g. supports or receptacles
• CPC Class Codes: B60S 3/00 Vehicle cleaning apparatus not integral with vehicles cleaning in general B08B; cleaning peculiar to waterborne vessels B63B57/00, B63B59/00; ground equipment for cleaning aircraft B64F5/30
• CPC Class Codes: D06F 39/02 Devices for adding soap or other washing agents
• CPC Class Codes: Y10T 137/4891 With holder for solid, flaky or pulverized material to be dissolved or entrained

Abstract

A system for converting powdered detergent in a shipping container into a concentrated detergent solution and for maintaining a predetermined volume of the solution available for use by a remotely located washing apparatus. A chassis defines a reservoir suitable for holding concentrated detergent solution and has an inlet port opening into the reservoir. A curved screen member is continuously mounted across and extends into the open mouth end of a detergent-filled container. A cradle assembly pivotally positions the container and screen in inverted position over the inlet port to the reservoir such that the curved screen retainably supports the detergent within the container. A single nozzle is mounted at the inlet port for uniformly directing a spray of solution from the reservoir against substantially the entire downwardly facing surface of the screen, dissolving a portion of the detergent carried thereby, which passes in solution through the screen and into the underlying reservoir. Automatic safety control apparatus protects operators of the system from hazardous spray of solution from the nozzle by preventing energization of the pump which feeds solution to the nozzle whenever the container is not operatively positioned overlying the inlet port and in locked sealing engagement with the chassis.

Claims

1. A remote powdered detergent dispenser of the type which produces a concentrated detergent solution from powdered detergent within a container for supplying a remotely located washing machine therewith, comprising:

(a) a chassis defining a reservoir, said chassis having an upper inlet port opening into said reservoir;

(b) a continuous curved screen member overlying and completely covering said inlet port, said curved screen member being shaped to present a downwardly facing concave surface with respect to the underlying reservoir and having a mesh sized to prevent powdered detergent from passing therethrough;

(c) means for positioning and for holding a powdered detergent bearing container in an inverted position in overlying engagment with said curved screen member such that said screen member projects into the mouth of the container and is convexly disposed relative to the inside of the container for supportingly engaging the powdered detergent in the container;

(d) seal means cooperatively engaging the container and said chassis for forming a leakproof seal therebetween when the container is in operative position overlying the inlet port to said reservoir;

(e) spray means for converting the powdered detergent to a detergent solution, comprising;

(i) a single nozzle mounted at said inlet port to said reservoir and disposed generally below the center of said curved screen member for directing a uniform spray at substantially the entire downwardly facing concave surface of said screen member to dissolve that portion of the powdered detergent being carried immediately above said screen, whereby the dissolved detergent passes in solution through the screen and is collected by said underlying reservoir; and

(ii) a pump connecting said reservoir and said nozzle, operative when energized to generate said spray by forcing solution from the reservoir through said nozzle;

(f) spray control means operatively connected with said spray means for selectively energizing said pump so as to maintain within said reservoir a predetermined volume of said detergent solution; and

(g) safety control means for selectively blocking energization of said pump, said safety control means being operative to prevent the spray of said solution through said nozzle whenever the container is not operatively positioned over said inlet port.

2. A remote powdered detergent dispenser as recited in claim 1, wherein said curved screen member is generally cone shaped having its vertex disposed upwardly in the vertical direction away from said reservoir and projecting into the mouth of the powdered detergent bearing container;

and wherein said holding means includes means for removably securing said screen to the container at its mouth for movement therewith as defined by said positioning means.

3. A remote powdered detergent dispenser as recited in claim 2, wherein said positioning means includes means for pivotally mounting the container to said chassis for movement between first and second positions, whereby the container is disposed in an upright manner with its mouth removed from said inlet port when positioned in said first position and is disposed in said operative inverted position with its mouth cooperatively overlying said inlet port when positioned in said second position.

4. A remote powdered detergent dispenser as recited in claim 1, wherein said safety control means comprises a first safety switching means responsive to the position of the container relative to said inlet port of said reservoir, for selectively blocking energization of said pump, said first safety switching means being operable in a first switching mode when the container is not operatively positioned overlying said inlet port to said reservoir to de-energize said pump, thus preventing solution spray through said nozzle, and being operable in a second switching mode when the container is operatively positioned overlying said inlet port to said reservoir to electrically enable energization of said pump.

5. A remote powdered detergent dispenser as recited in claim 1, including locking means for securely locking the container to said chassis in its inverted operative position overlying said inlet port to said reservoir.

6. A remote powdered detergent dispenser as recited in claim 5, wherein said safety control means comprises first safety switching means responsive to said locking means for selectively blocking energization of said pump, said first safety switching means being operable in a first switching mode to de-energize said pump whenever said locking means is not positioned so as to operatively lock the container to said chassis, and being operable in a second switching mode to electrically enable energization of said pump whenever said locking means is positioned so as to securely lock the container to said chassis.

7. A remote powdered detergent dispenser as recited in claim 6 wherein said locking means comprises a first locking lever connected to said chassis for selectively controlling movement of the container relative to said chassis, said first locking lever being positionable in an unlocked position to enable free movement of the container relative to said chassis and being movable to a locked position to prevent movement of the container away from its said operative inverted position overlying said inlet port to said reservoir;

and wherein said first safety switching means is connected to sense the motion of said first locking lever between its said unlocked and locked positions, and is operative in its said first switching mode when said locking lever is positioned in its said unlocked position, and is operative in its said second switching mode when said locking lever is positioned in its said locked position.

8. A remote powdered detergent dispenser as recited in claim 6, wherein said safety control means further includes second safety switching means responsive to the position of the container relative to said inlet port of said reservoir, for selectively locking energization of said pump, said second safety switching means being operable in a first switching mode when the container is not operatively positoned overlying said inlet port to said reservoir to de-energize said pump, thus preventing solution spray through said nozzle, and being operable in a second switching mode when the container is operatively positioned overlying said inlet port to said reservoir to electrically enable energization of said pump.

9. A remote powdered detergent dispenser as recited in claim 8, wherein said pump is energized by an energizing circuit path comprising said first and second safety switching means connected in electrical series as part thereof, wherein said first and said second safety switching means are operable to prevent energization of said pump whenever either of said first and said second safety switching means is operative in its respective said first mode.

10. A remote powdered detergent dispenser as recited in claim 1, further including:

(a) means operatively connected with said reservoir for removing said concentrated solution therefrom to supply a remotely located washing machine with the solution; and

(b) means operatively connected to add water to said reservoir solution for maintaining a predetermined volume of said solution within said reservoir.

11. In combination with powdered detergent dispenser apparatus of the type having a chassis defining a reservoir for collecting a supply of concentrated detergent solution to be drawn for use by remote equipment;

a container for powdered detergent having an open mouth and operatively disposed in inverted manner with its mouth overlying the reservoir;

a curved screen member mounted to continuously extend across the container mouth for supporting powdered detergent in the container overlying the reservoir and defining a downwardly facing curved surface;

spray means disposed below the curved screen member suitable for forming a spray from received fluid flow and for directing the spray at substantially the entire downwardly facing surface of the screen member, thus dissolving a portion of the powdered detergent carried thereby, which passes in solution through the screen and is collected within the reservoir;

the improvement being characterized by improved control means operatively connected for selectively controlling the spray of fluid by said spray means, comprising;

(a) first fluid control means for periodically supplying said spray means with a flow of solution from the reservoir for causing a low-pressure spray to be formed therefrom which is directed against the downwardly facing surface of the curved screen member, for maintaining the detergent concentration level of the solution in the reservoir within a predetermined range; and

(b) safety control means responsive to positioning of the container relative to said underlying spray means for preventing spray of said solution from the spray means whenever the container is not positioned so as to completely intercept the produced solution spray.

12. The apparatus as recited in claim 11, wherein the chassis defines an inlet port overlying and opening into the reservoir, and wherein said safety control means further comprises:

(a) locking means mounted to engage the container for securely locking the container in its operative inverted position overlying said inlet port, said locking means being operable in an unlocked position to enable free movement of the container relative to said inlet port, and being operable in a locked position to immovably secure the container in its operative position overlying said inlet port; and

(b) safety switching means responsive to movement of said locking means for selectively blocking spray of said solution from the spray means, said safety switching means being operative in a first mode to block said solution spray from the spray means whenever said locking means is operatively positioned in its unlocked position, and being operable in a second mode to enable said solution spray from the spray means whenever said locking means is operatively positioned in its said locked position.

13. The apparatus as recited in claim 11, wherein the chassis defines an inlet port overlying and opening into the reservoir;

and wherein the improvement is further characterized by;

(a) means cooperative with the curved screen member for forming a leakproof continuum between the reservoir and the inside of the container when the container is operatively positioned in inverted manner overlying said inlet port; and

(b) said safety control means further comprising;

(i) a first triggering element connectable for movement with the container; and

(ii) first safety switching means fixedly mounted to the chassis for sensing the position of said first triggering element relative thereto and being responsive to said sensed position for selectively blocking said flow of solution to said spray means, said first safety switching means being operable in a first mode to block flow of said solution to said spray means whenever the positioning of said first triggering element relative to said first safety switching means indicates that the container is not operatively positioned in inverted manner overlying said inlet port, and being operable in a second mode to enable flow of said solution to the spray means whenever the relative position of said first triggering element indicates operative inverted alignment of the container overlying said inlet port.

14. The apparatus as recited in claim 13, further including means for mounting said first triggering element to said container in predetermined position adjacent the mouth thereof;

and wherein said first safety switching means includes a sensing element mounted to the chassis adjacent said inlet port and in cooperative sensing alignment with said first triggering element, said first triggering element and said sensing element being cooperatively operable when in close proximity to one another to cause said first safety switching means to become operable in its said second mode, and being inoperable when not in close proximity to one another to cause said first safety switching means to become inoperable in its said first mode.

15. The apparatus as recited in claim 14, wherein said sensing element of said first safety switching means comprises a magnetically responsive sensor for activating said first safety switching means between its said first and said second modes, and wherein said first triggering means comprises a magnetic element.

16. The apparatus as recited in claim 11, wherein the chassis defines an inlet port overlying and opening into the reservoir;

and wherein the improvement is further characterized by;

(a) positioning means connected to the chassis for accurately positioning the container in operative inverted alignment overlying said inlet port; and

(b) said safety control means further comprising;

(i) a first triggering element connected to said positioning means and movable therewith to one resting position adjacent said inlet port whenever the container is placed by said positioning means to overlie said inlet port in inverted operative position relative to the spray means; and

(ii) first safety switching means mounted to the chassis adjacent said inlet port and in cooperative sensing alignment with said first triggering element for selectively blocking spray of said solution from the spray means, said first safety switching means being operable in a first mode to operatively block the spray of said solution from the spray means whenever said first triggering element is not positioned in its said one resting position, and being operable in a second switching mode to enable the spray of said solution from the spray means whenever said triggering element is operatively positioned in its said one resting position.

17. The apparatus as recited in claim 16, wherein said safety control means further comprises:

(a) locking means mounted to engage the container for securely locking the container in its said inverted operative position overlying said inlet port, said locking means being operable in an unlocked position to enable free movement of the container relative to said inlet port, and being operable in a locked position to immovably secure the container in its said operative position overlying said inlet port; and

(b) second safety switching means responsive to movement of said locking means for selectively blocking said solution spray from the spray means, said second safety switching means being operative in its first mode to block said solution spray from the spray means whenever said locking means is operatively positioned in its unlocked position, and being operable in a second mode to enable said solution spray from the spray means whenever said locking means is operatively positioned in its said locked position.

18. The apparatus as recited in claim 17, wherein said first fluid control means includes pump means for directing a fluid flow path of said solution from the reservoir to the spray means;

and an energizing circuit path for said pump means, said energizing circuit path including said first and said second safety switching means connected in electrical series as part thereof, said first and said second safety switching means being operable to energize said pump means so as to prevent a fluid flow path of said solution to the spray means whenever either of said first or said second safety switching means is operative in its respective said first mode.

19. Apparatus for preparing a concentrated detergent solution, comprising:

(a) a container suitable for carrying a powdered detergent and having a downwardly facing substantially completely open end;

(b) a curved screen member mounted to said container at its open end and projecting inwardly from the open end in the direction toward the detergent carrying portion of the container, said screen member having a mesh continuously extending across said open end and sized to prevent the powdered detergent carried within the container from passing therethrough;

(c) a reservoir suitable for holding a detergent solution disposed below said container and having an inlet port aligned with the open end of said container;

(d) a single spray-forming nozzle mounted at the inlet port of said reservoir for forming a spray of fluid passing therethrough and for directing the spray on substantially the entire downwardly facing concave surface of said screen member to dissolve that portion of the powdered detergent lying on and immediately adjacent the screen member into a detergent solution which passes through the screen into the underlying reservoir;

(e) controlled supply means for periodically directing solution from said reservoir through said nozzle to maintain a supply of detergent solution within said reservoir for use by remote apparatus, said supply means being operable to maintain the concentration level of said solution in said reservoir within a predetermined range; and

(f) safety control means connected with said controlled supply means for sensing the position of said container relative to said inlet port and for automatically preventing said solution from passing through said nozzle when said container is not positioned in overlying relationship with said nozzle so as to completely intercept spray emanating therefrom.

20. The apparatus as recited in claim 19, further including a second screen member fixedly mounted to said reservoir, continuously extending across said inlet port thereto and having a mesh sized to prevent the powdered detergent carried by said container from passing therethrough;

said second screen member having an opening therethrough sized to cooperatively accept said nozzle for permitting unobstructed spray from said nozzle above the upper surface of said second screen member.

21. The apparatus as recited in claim 19, further including cradle assembly means mounted to cooperatively engage said container for pivotally positioning said container in an inverted operative position overlying said inlet port to said reservoir.

22. The apparatus as recited in claim 21, wherein said safety control means includes sequentially operable switching means cooperatively connected with said cradle assembly means for automatically preventing solution flow through said nozzle whenever said container is not operatively positioned overlying said inlet port to said reservoir.

23. Apparatus for withdrawing as a concentrated detergent solution, powdered detergent from a substantially completely open end of a container holding such detergent, comprising:

(a) a chassis defining a reservoir for a detergent solution, said chassis having an upper inlet port opening into said reservoir;

(b) container receptor means having a retaining base for matingly accepting the open end of the container, a curved screen member sized to extend across the retaining base for entirely covering the open end of a container matingly engaged with said retaining base and having a mesh sized for preventing powdered detergent from passing therethrough, and means for securing the retaining base and screen members to a container at its open end;

(c) means for rapidly positioning said receptor means and affixed container in cooperative engagement with said chassis at its said inlet port such that said retaining base of said receptor means is aligned with said inlet port, forming a continuum between the reservoir and the inside of the container affixed to said receptor means;

(d) spray means for periodically directing a spray of solution from said reservoir at substantially the entire downwardly facing surface of said screen member for hydrating a portion of the powdered detergent carried thereby which passes in solution through the screen member and into the underlying reservoir; and

(e) safety control means responsive to said positioning means for preventing spray of solution from said spray means whenever said receptor means and affixed container are not operatively positioned in inverted manner overlying said inlet port of said reservoir.