Patent Description:
A bucket assembly and a method of operating the bucket assembly is known from <CIT>.

Floor mops are often used in conjunction with a bucket containing rinsing fluid, such as water and/or cleaning fluid for replenishing moisture on the mop head or rinsing the mop head. After applying the mop head to a surface to be cleaned, however, placement of the mop head back into the rinsing fluid provides a contamination with dirt removed from the cleaned surface. Repeated insertions in the rinsing fluid and usage on a surface to be cleaned enhances the level of dirt in the rinsing fluid, and may diminish the ability of the system to clean a surface. Emptying of the bucket to obtain clean rinsing fluid atmosphere may be inconvenient and time consuming. Emptying of the bucket to obtain clean rinsing fluid additionally increases water consumption, and may increase cleaning fluid consumption.

The Embell System is a bucket system that provides a bucket having two separate chambers for receiving the mop head. A rinsing fluid valve is actuated to measure out a predetermined amount of rinsing fluid into a first chamber for each rinse of the mop head. After the mop head is rinsed in the first chamber, the rinsed mop head is placed into a second chamber where the mop head is squeezed to dry the mop head before it is applied to a subsequent surface. Squeezing the mop head separates excess rinsing water from the mop head, the extracted rinsing water automatically draining into a dirty water tank. As the mop head is squeezed in the second chamber, the force likewise is applied to open a drain in the first chamber to discard any remaining rinsing fluid in the first chamber. As the mop head is removed from the second chamber, the operator may use the mop handle to actuate the clean water valve adj acent the second chamber to again measure a predetermined amount of rinsing water into the first chamber.

The disclosure describes, in one aspect, a bucket assembly for use with a mop having a mop head. The bucket assembly includes an inner bucket assembly and an outer bucket assembly. The inner bucket assembly includes a rinse bucket, a first reservoir, a fluid connection between the rinse bucket and the first reservoir, and at least one closure element disposed at the fluid connection and movable between an open position and a closed position. The inner bucket may include a fill hole and a plug. The first reservoir is optionally otherwise sealed when the at least one closure element is in the open position. The outer bucket assembly includes an outer bucket peripheral wall extending from an outer bucket base to form a second reservoir. The inner bucket is disposed at least partially within the second reservoir. A drainage channel is fluidly connected to the second reservoir. The drainage channel formed by at least one of the inner bucket assembly, the outer bucket assembly, and the inner bucket assembly and the outer bucket assembly.

The disclosure describes in another aspect, a bucket assembly for use with a mop having a mop head, the bucket assembly including an inner bucket assembly and an outer bucket assembly having first and second reservoirs. The outer bucket assembly includes an outer bucket peripheral wall extending from an outer bucket base to form the second reservoir, the inner bucket being disposed at least partially within the second reservoir. The inner bucket assembly includes a first inner bucket element and a second inner bucket element. The first inner bucket element forms a rinse bucket, and the first reservoir is formed between the first inner bucket element and the second inner bucket element. A fluid connection is disposed between the rinse bucket and the first reservoir, and at least one closure element is disposed at the fluid connection and movable between an open position and a closed position. A drainage channel is at least partially formed by the inner bucket assembly, and is fluidly connected to the second reservoir. A plurality of welds is provided between the first inner bucket element and the second inner bucket element including a first weld between the first circumferentially about the rinse bucket, a second weld circumferentially about the drainage channel, and a third weld about peripheries of both the first inner bucket element and the second inner bucket element.

This disclosure relates to a bucket assembly <NUM> for use with a mop. While the mop is not specifically illustrated, those of skill in the art will appreciate that the mop would have a shaft and a mop head that typically includes one or more absorbent structures. An exemplary interior of a representative mop head <NUM> is illustrated in the figures as a generally triangular structure, explained in greater detail below. Referring to the embodiment of the bucket assembly <NUM> illustrated in <FIG>, the exploded view of <FIG>, and the cross-sectional views of <FIG> and <FIG>, the bucket assembly <NUM> includes an inner bucket assembly <NUM> received at partially in an outer bucket assembly <NUM>, and presents a rinse bucket <NUM> for rinsing a mop head, and a drainage channel <NUM> for receiving excess fluid from the mop head.

The inner bucket assembly <NUM> includes the rinse bucket <NUM>, as well as a first reservoir <NUM> that is fluid couplable to the rinse bucket <NUM> by a fluid connection <NUM>. The inner bucket assembly <NUM> may also include a fill opening <NUM> that opens into the first reservoir <NUM>, and a plug <NUM> sized to seal the fill opening <NUM>. While an alternative design may be provided, in the illustrated embodiment, the plug <NUM> is coupled with the inner bucket assembly <NUM> by way of an arm <NUM> that may be coupled to the inner bucket assembly <NUM> by way of an engaging structure such as a rivet <NUM> or the like. The first reservoir <NUM> may be utilized to hold a rinse fluid for provision to the rinse bucket <NUM> so that a mop head may be placed in the rinse bucket <NUM> for contact with the rinse fluid. The rinse fluid may be any appropriate fluid, such as water, water with a cleaning solution, or another cleaning solution.

The fluid connection <NUM> may be selectively opened and closed by way of at least one closure element <NUM>. While an alternative arrangement may be provided, in the illustrated embodiment, the closure element <NUM> is an elongated structure <NUM> that is slidably received in an elongated recess <NUM> that is flanked on either side by flanges <NUM>. In order to facilitate movement by an operator, the closure element <NUM> includes a handle or tab <NUM> at its upper end. The inner bucket assembly <NUM> may likewise include a depression or recess <NUM> disposed substantially adjacent the tab <NUM> in assembly. The recess <NUM> may allow an operator to easily grasp the tab <NUM> and slide the elongated structure <NUM> of the closure element <NUM> within the elongated recess <NUM> in order to selectively open and close the fluid connection <NUM>.

In order to allow flow from the first reservoir <NUM> to the rinse bucket <NUM>, the closure element <NUM> may be moved from the closed position illustrated in <FIG>, to the open position illustrated in <FIG>. As the closure element <NUM> moves from the closed position (<FIG>) to the open position (<FIG>), the fluid connection <NUM> between the first reservoir <NUM> and the rinse bucket <NUM> is progressively opened. Conversely, as the closure element <NUM> moves from the open position to the closed position, the fluid connection <NUM> between the first reservoir <NUM> and the rinse bucket <NUM> is progressively closed.

The inner bucket assembly <NUM> may further include one or more detents or other mechanisms by which may facilitate retention of the closure element <NUM> in a particular position relative to the fluid connection <NUM> and the elongated recess <NUM>. For example, a number of protrusions and/or recesses may be provided along the closure element <NUM> and the rinse bucket <NUM>. The engagement of the protrusions with the recesses, as well as other surfaces may provide detents that facilitate maintenance of the closure element <NUM> in a particular position.

Referring to <FIG>, in at least one embodiment, the closure element <NUM> may include one or more protrusions <NUM>, <NUM>, <NUM> and recesses <NUM>, and the rinse bucket <NUM> may include one or more protrusions <NUM> and recesses <NUM>. More specifically, protrusion <NUM> may be located along the closure element <NUM> such that it abuts an edge of the fluid connection <NUM> when the closure element <NUM> is disposed in a closed position (see <FIG>, <FIG> and <FIG>). In this way, the disposition of the protrusion <NUM> against the edge of the fluid connection <NUM> as well as the distal end of the closure element <NUM> abutting a surface of the rinse bucket <NUM> acts to retain the closure element <NUM> in the closed position, inhibiting flow through the fluid connection <NUM>.

According to another aspect of the illustrated embodiment, a protrusion <NUM> may be formed in the rinse bucket <NUM>, while the closure element <NUM> may include protrusions <NUM>, <NUM> forming recess <NUM> therebetween. While the protrusion <NUM> of the rinse bucket <NUM> is disposed proximal to an edge of the fluid connection <NUM> in the embodiment as illustrated in <FIG> and <FIG>, protrusion may alternatively be spaced away from the edge. As illustrated in <FIG>, when the closure element <NUM> is disposed in the open position, the protrusions <NUM>, <NUM> of the closure element <NUM> are disposed about the protrusion <NUM> of the rinse bucket <NUM>. That is, the protrusion <NUM> of the rinse bucket <NUM> is disposed within the recess <NUM> formed between the protrusions <NUM>, <NUM> of the closure element <NUM> to facilitate retention of the closure element <NUM> in the open position relative to the fluid connection <NUM>.

In order to enhance the engagement of the positional detents, one or more biasing elements may be provided. That is, such biasing elements may be provided to facilitate the engagement of the protrusion <NUM> of the closure element <NUM> abutting an edge of the fluid connection <NUM> when the closure element <NUM> is disposed in a closed position, and/or the engagement of the protrusion <NUM> of the rinse bucket <NUM> within the recess <NUM> formed between the protrusions <NUM>, <NUM> of the closure element <NUM>. While alternative biasing elements such as, for example, springs may be provided, in the illustrated embodiment, the biasing elements are in the form of one or more ramped surfaces <NUM>, <NUM>. As may be seen in <FIG> and <FIG>, the flanges <NUM> on either side of the elongated recess <NUM> in which the closure element <NUM> is slidably disposed may include a ramp <NUM>. In this way, as the closure element <NUM> moves from the open position to the closed position, the ramp <NUM> biases the distal end of the closure element <NUM> toward the fluid connection <NUM> through the rinse bucket peripheral wall <NUM>, causing the protrusion <NUM> to be disposed within the fluid connection <NUM>. As shown in <FIG> and <FIG>, the protrusion <NUM> is disposed abutting the edge of the fluid connection <NUM> and the protrusion <NUM> of the rinse bucket peripheral wall <NUM> to bias the closure element <NUM> into the closed position.

As may be seen in <FIG>, the closure element <NUM> may alternatively or additionally include a ramped surface. In the illustrated embodiment, the protrusions <NUM>, <NUM> are disposed along a ramped surface <NUM> of the closure element <NUM>. While the ramped surface <NUM> extends partially across the lateral face of the closure element <NUM>, it will be appreciated that the ramped surface <NUM> may alternatively extend across a greater portion of the lateral face of the closure element <NUM>. As the closure element <NUM> is advanced from the closed position illustrated in <FIG> to the closed position illustrated in <FIG>, the protrusion <NUM> of the rinse bucket peripheral wall <NUM> rides along the ramped surface <NUM>. In this way, with a slight force, the protrusion <NUM> may be moved over the protrusion <NUM>, allowing the protrusion <NUM> to be positioned in the recess <NUM> between the protrusions <NUM>, <NUM>. It will be appreciated that the protrusion <NUM> may include a distal ramped surface <NUM> that may facilitate initial assembly of the closure element <NUM> in the elongated recess <NUM>.

While the illustrated embodiment includes a plurality of protrusions and recesses are located in exemplary positions on the closure element <NUM> and the peripheral wall <NUM>, those of skill in the art will appreciate that one or more such detents may alternatively be located to define detent position. Alternatively, or additionally, separate structures may be provided.

It will also be appreciated that additional guidance structures may be provided. By way of example only, an end of the closure element <NUM> proximal the handle or tab <NUM> and the adjacent rinse bucket peripheral wall <NUM> may be provided with a keyed structure. In the illustrated embodiment of <FIG>, the closure element <NUM> is provided with a protruding key <NUM>, while the elongated recess <NUM> within the rinse bucket peripheral wall <NUM> may include an elongated slot <NUM>. In this way, the protruding key <NUM> may slide within the elongated slot <NUM>, guiding the movement of the closure element <NUM> within the elongated recess <NUM>. Alternative arrangements for guiding the movement of the closure element <NUM> within the elongated recess <NUM> are envisioned by this disclosure. For example, the protruding key <NUM> and elongated slot <NUM> or other guiding structure may be alternatively placed, and/or the elongated recess <NUM> may include a protruding key, and the closure element <NUM> include an elongated slot receiving protruding key. Further the protruding key <NUM> may include a bulbous structure and the elongated slot <NUM> and engaging structure such that the protruding key <NUM> may slide longitudinally within the elongated slot <NUM>, but lateral movement of the closure element <NUM> as well as movement of the closure element <NUM> at a right angle to the elongated slot <NUM> and elongated recess <NUM> are inhibited.

Those of skill in the art will appreciate that, while the at least one closure element <NUM> is illustrated as a sliding structure, the closure element may have an alternative structure. By way of example only, the closure element may be a pivoting element or a rotating element. The closure element may be movable to open the fluid connection <NUM> to varying degrees to allow, for example, varied levels of rinse fluid within the rinse bucket <NUM>.

According to an aspect of this disclosure, the first reservoir <NUM> may be sealed chamber such that movement of the closure element <NUM> to the open position allow air into the first reservoir <NUM> to permit a flow of rinse fluid into the rinse bucket <NUM> through the fluid connection <NUM>. In this way, the position of the fluid connection <NUM> within the rinse bucket <NUM>, as well as the degree to which the closure element <NUM> is opened will dictate the level to which the rinse fluid will rise within the rinse bucket <NUM>. Those of skill in the art will appreciate that the rinse fluid will enter the rinse bucket <NUM> only to the level to which the fluid connection <NUM> is opened. As a result, when the fluid connection <NUM> is maintained in an open position, clean rinse fluid will flow into the rinse bucket <NUM> each time the rinse fluid level in the rinse bucket <NUM> falls below the level to which the fluid connection <NUM> is opened. This automatic replenishment of the rinse fluid within the rinse bucket <NUM> may allow an operator more quickly and efficiently mop a surface.

The rinse bucket <NUM> may be of any appropriate shape and design. In the illustrated embodiment, the rinse bucket <NUM> includes a rinse bucket peripheral wall <NUM> extending from a rinse bucket base <NUM>. The rinse bucket base <NUM> may include one or more protrusions <NUM> into the interior of the rinse bucket <NUM>. The one or more protrusions <NUM> may be used as a base against which a pressure may be applied to the mop head during rinsing. Alternative designs are envisioned. While not illustrated, for example, those of skill in the art will appreciate that the rinse bucket <NUM> may be provided actuable drain holes. For example, depression of a spring-loaded center protrusion (not illustrated) may be used to open drain holes in the rinse bucket base <NUM> to allow selective drainage from the rinse bucket <NUM>.

It will be appreciated that rinse fluid applied to the mop head in the rinse bucket <NUM> may be used in cleaning dirt and undesirable matter (collectively referred to as "dirt") from the mop head. The outer bucket assembly <NUM> includes an outer bucket peripheral wall <NUM> that extends from an outer bucket base <NUM> to form a second reservoir <NUM> for collection of rinse fluid and dirt from the mop head. In order to separate excess rinse fluid with dirt from the mop head, the drainage channel <NUM> that drains to a second reservoir <NUM> in the outer bucket assembly <NUM> is provided. While the drainage channel <NUM> may be formed by either the inner bucket assembly <NUM> or the outer bucket assembly <NUM>, in the illustrated embodiment, the drainage channel <NUM> is formed by a combination of the inner and outer bucket assemblies <NUM>, <NUM>. That is, the inner bucket assembly <NUM> includes a first, tubular portion <NUM> of the drainage channel <NUM>, with the outer bucket assembly <NUM> forming a partial bottom surface <NUM> of the drainage channel <NUM>, a passage <NUM> between the inner and outer bucket assemblies <NUM>, <NUM>, allowing the flow of expelled fluid to the second reservoir <NUM>. Thus, the separation of the drainage channel <NUM> from the outer bucket base <NUM> allows expelled fluid to flow to the second reservoir <NUM>.

In order to facilitate expulsion of fluid from the mop head within the drainage channel <NUM>, a wringer assembly <NUM> may be provided (see also FIGS. and <NUM>). While an alternative arrangement may be utilized, in the illustrated embodiment, the wringer assembly <NUM> includes a rotating element <NUM> that extends into the drainage channel <NUM> and disposed to rotate a mop head disposed within the drainage channel <NUM>, the rotating element <NUM> defining a central spin axis <NUM>. While the rotating element <NUM> may directly engage the mop head in some designs, a cage or basket <NUM> may be engaged with the rotating element <NUM> and at least partially disposed within the drainage channel <NUM>. In this way, rotation of the rotating element <NUM> and the basket <NUM> will rotate a received mop head to expel fluid outwards into the drainage channel <NUM> and/or the second reservoir <NUM>.

In order to provide selective rotation to the rotating element <NUM>, an actuating assembly <NUM> may be provided. As shown in <FIG> and <FIG>, the rotating element <NUM> may extend through the outer bucket assembly <NUM> and into the drainage channel <NUM>, allowing the actuating assembly <NUM> to be disposed outside of the outer bucket assembly <NUM>. The actuating assembly <NUM> may include a gear assembly <NUM> and an arm <NUM> pivotably disposed to engage the gear assembly <NUM> and pivotably mounted relative to axis <NUM>. One end of the arm <NUM> includes teeth <NUM>, while the opposite end of the arm <NUM> acts as a foot pedal <NUM> for depression by the operator's foot to actuate the gear assembly <NUM> and rotate the rotating element <NUM>, and basket <NUM>, if provided. That is, the arm <NUM> and foot pedal <NUM> are pivotably coupled to a wringer assembly base <NUM> at axis <NUM>. The wringer assembly base <NUM> may be coupled with the outer bucket assembly <NUM> with the rotating element <NUM> extending into the interior of the outer bucket assembly <NUM>. An appropriate seal may be provided between the rotating element <NUM> and the outer bucket assembly <NUM>.

As may be seen in <FIG> and <FIG>, the teeth <NUM> of the arm <NUM> are engaged with pinion gear <NUM>, which is secured with gear <NUM> along axis <NUM>. Gear <NUM> includes axially oriented teeth <NUM>, which are rotatably engaged with pinion gear <NUM>. Pinion gear <NUM> is secured with the rotating element <NUM>, such that depression of the foot pedal <NUM> causes a rotation of the rotating element <NUM>.

An exemplary fragment of a mop head <NUM> is illustrated in <FIG>, <FIG>, <FIG> and <FIG>. In this exemplary embodiment, a mop shaft (not illustrated may be attached to a mop head base <NUM> at a coupling element <NUM>, or other appropriate structure. A fibrous mop portion (not illustrated) may be attached between a mop head base <NUM> and a retaining element <NUM>. In this embodiment, the mop head <NUM> has a generally triangular structure, and may include a recess <NUM> formed, for example, by the retaining element <NUM>.

As may be seen in <FIG> and <FIG>, the cage or basket <NUM> may include a basket base <NUM> having a domed structure <NUM> extending into the interior of the basket <NUM>, the rotating element <NUM> being received in the domed structure <NUM> of the basket base <NUM>. In an arrangement where the mop head <NUM> illustrated in <FIG>, <FIG>, <FIG>, and <FIG>, the domed structure of the basket base <NUM> may be at least partially received within the recess <NUM>. In this way, rotation of the basket <NUM> causes a rotation of the mop head <NUM>.

While the embodiment of <FIG> and <FIG> includes a wringer assembly <NUM>, those of skill in the art will appreciate that a bucket assembly may alternatively include a cage or basket of an alternatively design, or a cage or basket that does not rotate. In yet another embodiment, the bucket assembly <NUM> may include no cage or basket, such as is illustrated in <FIG>, for example.

In order to facilitate transport of the bucket assembly <NUM>, a handle <NUM> may be provided (see <FIG>and <FIG>). The illustrated handle <NUM> may be attached at pivot points <NUM> at either side of the bucket assembly <NUM>, here, at either side of the outer bucket assembly <NUM>. In at least one embodiment, the handle <NUM> includes a clip <NUM> for releasably receiving the shaft or rod (not illustrated) of a mop. It will be appreciated that the clip may have any appropriate structure. Referring to <FIG>, the clip <NUM> may include a cradle <NUM> for removably receiving a shaft of a mop, fingers <NUM> being disposed about the shaft. The clip <NUM> may include a cavity <NUM> that provides an additional level of flexibility to the cradle <NUM> and fingers <NUM> of the clip <NUM>. In this way, the clip may be utilized with various diameters of a shaft of a mop.

It will further be appreciated that the inner bucket assembly <NUM> may be separable from the outer bucket assembly <NUM> in order to facilitate filling of the first reservoir <NUM>, and emptying of the second reservoir <NUM>. To facilitate emptying of the second reservoir <NUM>, the outer bucket assembly <NUM> may include a pour spout <NUM>. The pour spout <NUM> may be spaced from the inner bucket assembly <NUM> when the inner and outer bucket assemblies <NUM>, <NUM> are assembled together such that the second reservoir <NUM> may be readily emptied whether or not the components are assembled together.

To facilitate handling of the inner bucket assembly <NUM> when it is separated from the outer bucket assembly <NUM>, the inner bucket assembly <NUM> may include flanges <NUM> on either side of the inner bucket assembly <NUM> that allow an operator to readily grasp the inner bucket assembly <NUM> for separation from the outer bucket assembly <NUM> or carrying for filling. The inner bucket assembly <NUM> may additionally include one or more legs <NUM>, <NUM> that along with the rinse bucket base <NUM>, may be used to stabilize the inner bucket assembly <NUM> on a surface. The legs <NUM>, <NUM> may additionally engage structure of the outer bucket assembly <NUM> in some embodiments.

The inner and outer bucket assemblies <NUM>, <NUM> may be fabricated from any suitable material and by any suitable method. For example, the assemblies <NUM>, <NUM> may be formed from a polymeric material, with or without fillers, and may be molded, such as by injection or blow molding. By way of further example, the assemblies <NUM>, <NUM> may be 3D printed.

Further, the inner and outer bucket assemblies <NUM>, <NUM> may be formed of single or multiple pieces and then assembled by an appropriate method. For example, the inner bucket assembly may include a first inner bucket element <NUM> and a second inner bucket element <NUM>. In this way, the first reservoir <NUM> may be formed of the first inner bucket element <NUM>, the second inner bucket element <NUM>, or a combination of the first and second inner bucket elements <NUM>, <NUM>. In the illustrated embodiment, the first inner bucket element <NUM> includes the rinse bucket <NUM>, while the second inner bucket element <NUM> includes at least a portion of the drainage channel <NUM>, the first reservoir <NUM> being formed between the first and second inner bucket elements <NUM>, <NUM>, although varied structures are envisioned under this disclosure. As may be seen in <FIG>, in some embodiments, at least a portion of the first inner bucket element <NUM>, here, the rinse bucket <NUM>, may be received within and/or through the second inner bucket element <NUM>.

One or more welds or other appropriate sealing mechanisms may be provided between the first and second inner bucket elements <NUM>, <NUM> in order to provide a sealed first reservoir <NUM>. For example, a first weld <NUM> may be provided circumferentially about the rinse bucket <NUM>, a second weld <NUM> may be provided circumferentially about the drainage channel <NUM> and a third weld <NUM> may be provided about the peripheries of both the first and second inner bucket elements <NUM>, <NUM>.

The present disclosure is applicable to a mop bucket assembly <NUM> that may enhance cleaning of surfaces, by providing a ready supply of rinse fluid and facilitate efficient mopping of surfaces. By maintaining the closure element <NUM> in an open position, a continual supply of rinse fluid may be provided to the rinse bucket <NUM>. Inasmuch as the first reservoir <NUM> may be otherwise sealed, the level of rinse fluid within the rinse bucket <NUM> will rise only to the level of the fluid connection <NUM> between the first reservoir <NUM> and the rinse bucket <NUM>.

At least some embodiment of the mop bucket assembly <NUM> may be readily and economically fabricated and yield a reliable and durable mop bucket assembly <NUM>.

It will be appreciated that the foregoing description provides examples of the disclosed system and technique. However, it is contemplated that other implementations of the disclosure may differ in detail from the foregoing examples. All references to the disclosure or examples thereof are intended to reference the particular example being discussed at that point and are not intended to imply any limitation as to the scope of the disclosure more generally. All language of distinction and disparagement with respect to certain features is intended to indicate a lack of preference for those features, but not to exclude such from the scope of the disclosure entirely unless otherwise indicated.

Claim 1:
A bucket assembly (<NUM>) for use with a mop having a mop head, the bucket assembly (<NUM>) comprising:
an inner bucket assembly (<NUM>), the inner bucket assembly (<NUM>) including a rinse bucket (<NUM>), a first reservoir (<NUM>), a fluid connection (<NUM>) between the rinse bucket (<NUM>) and the first reservoir (<NUM>), and at least one closure element (<NUM>) disposed at the fluid connection (<NUM>) and movable between an open position and a closed position,
an outer bucket assembly (<NUM>), the outer bucket assembly (<NUM>) including an outer bucket peripheral wall (<NUM>) extending from an outer bucket base (<NUM>) to form a second reservoir (<NUM>), the inner bucket assembly (<NUM>) being disposed at least partially within the outer bucket assembly (<NUM>),
a drainage channel (<NUM>) fluidly connected to the second reservoir (<NUM>), the drainage channel (<NUM>) being formed by at least one of
the inner bucket assembly (<NUM>),
the outer bucket assembly (<NUM>), and
the inner bucket assembly (<NUM>) and the outer bucket assembly (<NUM>), and
wherein the first reservoir (<NUM>) is otherwise sealed when the at least one closure element (<NUM>) is in the open position.