Dishwasher detergent dispenser

• US 5,176,297 A
• Filed: 06/14/1990
• Issued: 01/05/1993
• Est. Priority Date: 06/14/1990
• Status: Expired due to Fees

• Current Assignee: Diverseylever Incorporated (Unilever PLC)
• Original Assignee: Diversey Limited (Sealed Air)
• Inventors: Hetherington, Michael W., Mooney, Phillip B.
• Primary Examiner(s): Hajec, Donald T.
• Assistant Examiner(s): Pomrening, Anthoula
• Application Number:
  US07/537,567
• Time in Patent Office: 936 Days
• Field of Search: 222/365, 222/651, 222/652, 222/325, 222/518, 222/361, 222/362, 222/332, 134/99, 134/100, 68/17 R
• US Class Current: 222/325
• CPC Class Codes: A47L 15/4418 in the form of liquids A47L15/4409, A47L15/4436, A47L15/4445 take precedence
• CPC Class Codes: A47L 15/4445 Detachable devices

Abstract

A dispensing system adapted for dispensing a dose of a liquid dishwasher chemical agent inside a dishwasher when the dispensing system is mounted inside a dishwasher includes:

i) a detergent dispensing system mounted inside the dishwasher;

ii) a container for a dishwasher detergent liquid;

iii) a dispensing device for dispensing from the container a dose of a dishwasher liquid to inside a dishwasher; and

iv) the container being removable from the dispensing device to permit replacement of the container as required.

Claims

1. A dispensing system adapted for dispensing a dose of a liquid dishwasher chemical agent inside a dishwasher when said dispensing system is mounted inside a dishwasher, said dispensing system comprising:

(a) means for mounting said dispensing system inside a dishwasher;

(b) a container for a liquid dishwasher chemical agent, said container being removable from said dispensing system to permit replacement of said container;

(c) means for dispensing from said container a dose of a liquid dishwasher chemical agent to inside a dishwasher; and

(d) said container having an outlet through which fluid may flow, and means connected to said outlet to retain liquid in said container when inverted for placement in said dispensing system, said dispensing means comprising means for actuating said liquid retaining means to dispense a dose of liquid.

2. A dispensing system of claim 1, wherein said mounting means is adapted to mount said dispensing system on an interior surface of a dishwasher.

3. A dispensing system of claim 1, wherein said mounting means is adapted to mount said dispensing system on a rack for insertion in a dishwasher.

4. A dispensing system of claim 1 wherein said retaining means includes means for metering a predetermined dose of a liquid which is dispensed on actuation of said retaining means by said actuating means.

5. A dispensing system adapted for dispensing a predetermined dose of a liquid, said dispensing system comprising:

i) means for mounting said dispensing system to a support;

ii) means for metering a predetermined dose from a supply of a liquid and retaining said metered dose for dispensing;

iii) means for mechanically actuating said dose metering means to release said retained metered dose of a liquid, said actuating means being attached to said mounting means and moveable between a first non-dispensing position to a second dispensing position in which said metering means releases said retained metered dose of a liquid;

iv) said supply of a liquid being held in a container;

v) said container having an outlet for a liquid held in said container, said dose metering means being connected to said outlet and adapted to retain liquid in said container when said container is inverted for operative association of said dose metering means with said actuating means in its first or second positions;

vi) means for supporting said container in an inverted position with said dose metering means in operative association with said actuating means, said supporting means engaging a portion of said container to support said container in said inverted position, said supporting means being adapted to permit release of said container when replacement of said container is required, said supporting means being attached to said dispenser mounting means.

6. A dispensing system of claim 5 adapted for dispensing a dishwasher detergent liquid inside a dishwasher when said dispensing system is mounted inside a dishwasher;

said mounting means being adapted to mount said dispensing system inside a dishwasher;

said metering means metering a predetermined dose of a dishwasher detergent liquid from said container.

7. A dispensing system of claim 6, wherein said mounting means is adapted to mount said dispensing system on an interior support surface of a dishwasher.

8. A dispensing system of claim 6, wherein said mounting means is adapted to mount said dispensing system on a rack for insertion in a dishwasher.

9. A dispensing system of claim 7 wherein said dose metering means includes means for reciprocating in a chamber which is in liquid communication with said container outlet, said actuating means operating on said reciprocating means to reciprocate said reciprocating means between said first non-dispensing position whereby a metered dose of a dishwasher detergent liquid is retained in said chamber and said second dispensing position whereby a metered dose of a dishwasher detergent liquid is released from said chamber.

10. A dispensing system of claim 9 wherein said dose metering means includes means for venting said container when said actuating means returns said reciprocating means to said first non-dispensing position.

11. A dispensing system of claim 9 wherein said reciprocating means comprises a plunger adapted for reciprocal movement in said chamber between said first and second positions, said plunger having a front face and a rear face, means for sealing an outer periphery of said plunger between said front and rear faces with an interior surface of said chamber, a portion of said chamber behind said rear face of said plunger when said plunger is in said first position defining a volume for a metered dose of a dishwasher detergent liquid, said chamber having means to release a dose of dishwasher detergent liquid when said plunger is moved to said second position.

12. A dispensing system of claim 11 wherein said means for releasing a dose of dishwasher detergent liquid is an aperture beyond which said plunger travels.

13. A dispensing system of claim 11 wherein said means for releasing a dose of dishwasher detergent liquid is provided by said chamber being open ended in a direction forward of said plunger front face, said plunger seal means when moved to said second dispensing position extending beyond said chamber open end, is moved sufficiently to release a dose of detergent liquid from said chamber.

14. A dispensing system of claim 10 wherein said venting means allows air to enter said container while said reciprocating means returns to said first non-dispensing position.

15. A dispensing system of claim 11 wherein said plunger in said second position allows air to enter said chamber through said release means while a dose of dishwasher detergent flows through said release means, air in said chamber venting said container when said plunger returns to said first position.

16. A dispensing system of claim 9 wherein said actuating means comprises a reciprocal slide, said slide having means for connecting to said reciprocating means when said container is located in said support means, said slide being adapted for manual movement between said first non-dispensing and said second dispensing positions.

17. A dispensing system of claim 16 wherein means biases said slide to said first position.

18. A dispensing system of claim 11 wherein said chamber has a cylindrical interior surface and said sealing means engages said cylindrical interior surface, said chamber being open-ended in a direction outwardly of said front face to define thereby an open-ended portion of said chamber, guide means connected to and spaced from said rear face of said plunger, said guide means contacting said cylindrical interior surface during reciprocal movement of said plunger, said plunger when moved to said second position positioning said sealing means beyond said open end sufficiently to release a dose of dishwasher detergent liquid, said guide means remaining within said chamber to support said plunger in said second position and guide return of said plunger sealing means to within said chamber.

19. A dispensing system of claim 18 wherein said guide means has means in contact with said cylindrical interior surface and positioned relative to said plunger to block flow of a dishwasher detergent liquid through said container outlet into said chamber towards said open ended portion of said chamber when said plunger is in said second position.

20. A dispensing system of claim 19 wherein said means for blocking flow of a dishwasher detergent liquid comprises a cylindrical piston which contacts said cylindrical interior surface and is located relative to said plunger such that when said plunger is in said second position, said piston is in a position to block flow of a dishwasher detergent liquid from said container outlet towards said open ended position of said cylinder.

21. A dispensing system of claim 20 wherein means biases said actuating means to said first position and means for controlling rate of return of said plunger towards said first position as biased by said biasing means, said rate of return control means comprising:

i) said container having a second outlet in communication with said dose metering means and located behind said cylindrical piston in a direction away from said open-ended portion of said cylinder, whereby liquid flows from said container into said chamber behind said piston as said plunger is moved to said second position by said actuating means;

ii) said second outlet being dimensioned for a particular viscosity of a liquid to be dispensed to control rate of return of liquid through said second outlet as said plunger is returned to said first position by said biasing means by virtue of said piston moving rearwardly into said cylinder to return liquid into said container through said second outlet, said dimensioned second outlet in controlling rate of return of liquid into said container in turn controlling rate of return of said plunger, said rate of return of said plunger from said second position being such to ensure release of a predetermined dose of liquids.

22. A dispensing system for dispensing a metered dose of a liquid, said dispensing system comprising:

(i) a support for receiving and supporting a container thereon, the support comprising a reciprocal slide, the slide being moveable between a first position and a second position;

(ii) a container having a hollow interior for holding liquid, the container having an outlet and having a cylindrical chamber formed therein for receiving a plunger, the chamber having a cylindrical interior surface and having an open-ended portion for dispensing liquid outwardly therefrom, the container comprising a plunger disposed in said chamber and adapted for reciprocal movement therein between a non-dispensing position corresponding to the first position of the slide and a dispensing position corresponding to the second position of the slide, the plunger having a front face and a rear face and comprising means for sealing an outer periphery thereof between said front and rear faces with the interior surface of said chamber, a portion of said chamber behind said rear face of said plunger defining a volume for a metered dose of liquid when said plunger is in said non-dispensing position, said container further comprising a cylindrical piston which contacts the cylindrical interior surface of the chamber, the cylindrical piston being connected to and spaced from said rear face of said plunger and adapted to block liquid flow from the container into the chamber when the plunger is in the dispensing position; and

(iii) means for mounting said dispensing system to a support, said plunger comprising a first part of a connector extending outwardly of said open ended chamber, said reciprocal slide comprising a second part of said connector, said first and second connector parts engaging one another to connect said slide to said plunger as said container is inserted into said support.

23. A dispensing system of claim 22 wherein said slide is biased to said first position by a mechanical-corrosion resistant spring.

24. A dispensing system of claim 23 wherein said sealing means is an annular wiper seal located on said plunger to seal against said cylindrical interior surface of said chamber as said plunger is reciprocated along said chamber by said slide.

25. An exchangeable container for liquid dishwasher chemical agent and which is adapted for use on a dispenser which is mounted inside of a dishwasher, said container comprising:

i) an elongated, narrow, hollow body portion;

ii) an outlet for said container located at a lowermost portion of said container when said container is in an inverted use position on a dispenser;

iii) means for metering a dose of liquid dishwasher chemical agent as such liquid would drain through said container outlet in an inverted use position on a dispenser, said metering means being connected to said container outlet and adapted to retain liquid in said container when in an inverted use position on a dispenser;

iv) said metering means having reciprocal means exterior of said container for engagement by a dispenser for said container whereby movement of said reciprocal means from a first non-dispensing position to a second dispensing position, dispenses a metered dose of liquids.

26. An exchangeable container of claim 25 wherein means is removably provided on said metering means to hold said reciprocal means in said first non-dispensing position whereby said metering means retains liquid in said container.

27. An exchangeable container of claim 25 wherein said metering means comprises:

i) a chamber in communication with said container outlet,

ii) a plunger for reciprocal movement in said chamber between said first and second positions, said plunger having a front face and a rear face,

iii) means for sealing an outer periphery of said plunger between said rear and front faces with an interior surface of said chamber, a portion of said chamber behind said rear face of said plunger when said plunger is in said first position defining a volume for a metered dose of a liquid;

iv) said chamber having means to release a dose of liquid when said plunger is moved to said second position.

28. An exchangeable container of claim 27 wherein said means for releasing a dose of liquid is provided by said chamber being open ended in a direction forward of said plunger front face, said plunger seal means when moved to said second position extending beyond said chamber open end sufficiently to release a dose of liquid.

29. An exchangeable container for a liquid dishwasher chemical agent and which is adapted for use on a dispenser which is mounted inside of a dishwasher, said container comprising:

(i) a hollow body portion;

(ii) an outlet for said container located at a lowermost portion of said container when said container is in an inverted use position on a dispenser;

(iii) means for metering a dose of liquid dishwasher chemical agent as such liquid would drain through said container outlet in an inverted use position on a dispenser, said metering means being connected to said container outlet and adapted to retain liquid in said container when in an inverted use position on a dispenser;

(iv) said metering means having reciprocal means exterior of said container for engagement by a dispenser for said container whereby movement of said reciprocal means from a first non-dispensing position to a second dispensing position dispenses a metered dose of liquid;

(v) said metering means comprising;

(a) a chamber in communication with said container outlet, said chamber having a cylindrical interior surface;

(b) a plunger for reciprocal movement in said chamber between said first and second positions, said plunger having a front face and a rear face;

(c) means for sealing an outer periphery of said plunger between said front and rear faces with the cylindrical interior surface of the chamber, a portion of said chamber behind said rear face of said plunger when said plunger is in said non-dispensing position defining a volume for a metered dose of said dishwasher chemical agent;

(d) said chamber having means to release a dose of said dishwasher chemical agent when said plunger is moved to said second position;

(e) a cylindrical piston connected to and spaced from said rear face of said plunger, said cylindrical piston contacting said cylindrical interior surface and is located relative to said plunger such that when said plunger is in said second position, said piston is in a position to block flow of liquid from said chamber for releasing such liquid;

(f) said container having a second outlet in communication with said cylindrical chamber and located behind said piston whereby liquid flows from said container into said chamber behind said piston as said plunger is moved to said second position; and

(g) said second outlet being dimensioned for a particular viscosity of a liquid to be dispensed to control rate of return of liquid through said second outlet as said plunger is returned to said first position whereby rate of return of said plunger is correspondingly controlled.