Floor cleaning devices and liquid delivery accessories for floor cleaning devices

Abstract

This invention relates to a floor cleaning device. The device has a cleaning head portion for engaging a floor surface during cleaning, an upright portion for manipulating the movement of the cleaning head portion, a liquid delivery fitting, a handle portion extending from the upright portion, and a sealed liquid storage container. The cleaning head portion includes a first nozzle and a second nozzle arranged at laterally opposite ends for discharging cleaning detergent forward therefrom. The liquid delivery fitting is configured to prevent or at least minimize undesirable leakage from the nozzles, regardless of the orientation of the device or fitting.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to UK Patent Application No. 2012186.9, filed on 5 August 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to floor cleaning apparatus and liquid delivery fittings suitable for, but not limited to, use in floor cleaning apparatus. The invention also relates to various applications of the liquid delivery fittings. Background Technology

[0004] There are several traditional floor cleaning devices. In older generations of these devices, the unit typically comes with a cleaning head with a handle attached. The cleaning head is configured to have a disposable cleaning cloth attached to it for engaging the floor surface during cleaning. If the user wants to use liquid cleaner to assist with cleaning, he / she will need to use a separate cleaner bottle and spray the liquid cleaner onto the floor surface before using the device. This can be inconvenient.

[0005] Later floor cleaning devices were developed by incorporating a cleaning fluid container as part of the device. This type of device, for example, includes a switch or actuator on the handle so that pressing the switch or actuator allows cleaning fluid from the container to be dispensed and sprayed onto the floor surface in front of the device. With this device, a separate detergent bottle is unnecessary. While a built-in fluid detergent supply unit is desirable, detergent leakage problems often arise. Other issues include unreliable liquid detergent flow when desired, complexity and / or large size of the construction, and high manufacturing costs.

[0006] This invention seeks to address these problems and / or at least provide the public with a useful alternative. The invention also provides liquid delivery fittings generally applicable to various applications. Summary of the Invention

[0007] According to a first aspect of the invention, a floor cleaning device is provided, comprising: a cleaning head portion for engaging a floor surface during cleaning; an upright portion for manipulating movement of the cleaning head portion; a liquid delivery fitting; a handle portion extending from the upright portion; and a sealed liquid storage container, wherein the cleaning head portion includes a first nozzle and a second nozzle arranged at laterally opposite ends for discharging cleaning detergent forward therefrom, wherein the liquid delivery fitting includes:

[0008] -First chamber,

[0009] - A first conduit, which allows fluid communication between the sealed liquid storage container and the first chamber.

[0010] -A second chamber located near the first chamber

[0011] - A first conduit that allows liquid to exit from the second chamber and proceed to the first nozzle for discharge.

[0012] -A third chamber located near the first chamber

[0013] - A second conduit, which allows gas communication between the third chamber and the sealed liquid storage container.

[0014] - An inlet that allows ambient air or gas to enter the third chamber and then into the liquid storage container.

[0015] -The fourth chamber located near the first chamber, and

[0016] - A second conduit, which allows liquid to exit from the fourth chamber and proceed to the second nozzle for discharge.

[0017] in:

[0018] a. The first chamber is provided with a first orifice for fluid communication with the second chamber, and the first orifice can be reciprocally closed by a first one-way valve.

[0019] b. The first chamber is provided with a second orifice for fluid communication with the fourth chamber, wherein the second orifice can be reciprocally closed by a second one-way valve, and

[0020] c. The second chamber and the fourth chamber are respectively provided with a third check valve and a fourth check valve for separately controlling the flow of liquid to the first conduit and the second conduit.

[0021] This configuration minimizes—if not completely prevents—undesired fluid leakage from the first or second nozzle.

[0022] Preferably, the second chamber and the fourth chamber may be provided with a first spring valve and a second spring valve, respectively, to minimize liquid leakage from the first conduit and the second conduit, respectively.

[0023] Suitable, the second chamber and the fourth chamber may be provided with a first plunger and a second plunger, respectively, which can be operated by a motor to pump fluid from the sealed liquid container to the first and second nozzles for discharge.

[0024] Advantageously, the third chamber may be provided with a third plunger, which may be operated by the motor to pump ambient air or gas into the third chamber via the inlet and then into the sealed liquid storage container via the second line to balance the pressure in the sealed liquid container.

[0025] In one embodiment, the third chamber may be provided with a fifth check valve for controlling the entry of ambient air or gas into the third chamber, and a sixth check valve for controlling the flow of air or gas from the third chamber to the sealed liquid storage container, in order to balance the pressure in the liquid storage container.

[0026] In one embodiment, the liquid delivery fitting may include a fifth chamber housing the first, second, and third plungers and the motor, and the fifth chamber includes a movable plate that can be driven by the motor and used to alternately actuate the first, second, and third plungers to produce a pumping action.

[0027] Advantageously, the cleaning head portion may not have any check valves for controlling liquid leakage from the first nozzle and / or the second nozzle when the floor cleaning device is not in use.

[0028] According to a second aspect of the present invention, a liquid delivery fitting is provided for controlling the flow of liquid from a sealed liquid storage container to a first nozzle, comprising:

[0029] -First chamber,

[0030] - A first conduit, which allows fluid communication between the sealed liquid storage container and the first chamber.

[0031] -A second chamber located near the first chamber

[0032] - A first conduit that allows liquid to exit from the second chamber for discharge through the first nozzle.

[0033] -A third chamber located near the first chamber

[0034] - A second pipeline, which allows gas communication between the third chamber and the sealed liquid storage container, and

[0035] - An inlet that allows ambient air or gas to enter the third chamber and then into the liquid storage container.

[0036] in:

[0037] a. The first chamber is provided with a first orifice that allows fluid communication with the second chamber, and the first orifice can be reciprocally closed by a first check valve.

[0038] b. The second chamber is provided with a second orifice, which can be reciprocally closed by a second one-way valve to control the flow of fluid to the first nozzle;

[0039] c. The second chamber is provided with a first plunger, which is operable by a motor to pump fluid from the sealed liquid storage container into the first chamber via the first line, then into the second chamber via the first orifice, and then into the second chamber via the second orifice.

[0040] d. The third chamber is provided with a second plunger, which can be operated by the motor to pump ambient air or gas into the third chamber via the inlet and then into the sealed liquid storage container via the second line to balance the pressure in the sealed liquid container.

[0041] This design requires only one motor to actively operate the liquid communication system and the air / gas communication system in the component, allowing for a more compact design.

[0042] Preferably, the second chamber may be provided with a third orifice, which may be reciprocatedly closed by a first spring-loaded valve to minimize leakage of liquid from the first conduit.

[0043] Suitable, the third chamber may be provided with a third check valve for controlling the entry of ambient air or gas into the third chamber, and a fourth check valve for controlling the flow of air or gas from the third chamber to the sealed liquid storage container, for balancing the pressure in the liquid storage container.

[0044] Advantageously, the accessory may include:

[0045] -The fourth chamber located near the first chamber, and

[0046] - A second conduit, which allows liquid to exit from the fourth chamber for use with the second nozzle.

[0047] in:

[0048] a. The first chamber is provided with a fourth orifice that allows fluid communication with the fourth chamber, and the fourth orifice can be reciprocally closed by a fifth one-way valve.

[0049] b. The fourth chamber is provided with a fifth orifice, which can be reciprocally closed by a sixth one-way valve to control the flow of fluid to the second nozzle.

[0050] c. The fourth chamber is provided with a second sub-chamber extending therefrom, and the second sub-chamber is provided with a sixth orifice, the sixth orifice being closable by a second spring-loaded valve to minimize fluid leakage from the second conduit, and

[0051] d. The fourth chamber is provided with a third plunger, which can be operated by the motor to pump fluid from the liquid storage container to the first chamber via the first line for use in the second chamber.

[0052] In one embodiment, the accessory may include a fifth chamber housing the first, second, and third plungers and the motor, the fifth chamber including a pivotable plate that can be driven by the motor and used to alternately actuate the first, second, and third plungers to generate a pumping action.

[0053] In one embodiment, the first and fifth one-way valves may be configured to allow one-way fluid flow from the first chamber to the second chamber and from the first chamber to the fourth chamber, respectively.

[0054] According to a third aspect of the invention, a floor cleaning device is provided, comprising: a cleaning head portion for engaging a floor surface during cleaning; an upright portion for manipulating the movement of the cleaning head portion; a liquid delivery fitting as described above; a handle portion extending from the upright portion; and the sealed liquid container, wherein the cleaning head portion includes a first nozzle and a second nozzle arranged at laterally opposite ends for discharging cleaning detergent forward therefrom.

[0055] Preferably, in the floor cleaning device, the sealed liquid storage container, the first pipeline, the first chamber, the second chamber, the first conduit, and the first nozzle can together define a first liquid flow path.

[0056] Suitable, in the floor cleaning device, the sealed liquid storage container, the first pipeline, the first chamber, the fourth chamber, the second conduit, and the second nozzle can, in sequence, define a second liquid flow path.

[0057] Advantageously, in the floor cleaning device, the surrounding air or gas, the inlet, the third chamber, the second pipeline, and the sealed liquid storage container can together define a gas flow path.

[0058] In a preferred embodiment, the cleaning head portion may not have any check valve for controlling liquid leakage from the first nozzle when the floor cleaning device is not in use.

[0059] According to a fourth aspect of the invention, a liquid handling accessory is provided for controlling the flow of a first liquid from a first liquid storage container and controlling the flow of a second liquid from a second liquid storage container for discharge, and for mixing the first fluid and the second fluid for generating a formulation therefrom during discharge, comprising:

[0060] -First chamber,

[0061] - A first conduit, which allows fluid communication between the first liquid storage container and the first chamber.

[0062] -A second chamber located near the first chamber

[0063] - A second conduit, wherein the first conduit allows fluid communication between the second liquid storage container and the second chamber.

[0064] – The first outlet from the first chamber and the second outlet from the second chamber, and

[0065] -A confluencer for mixing the first fluid and the second fluid exiting from the first outlet and the second outlet, respectively.

[0066] in:

[0067] a. The first chamber is provided with a first plunger, which is operable by a motor for pumping fluid from a first liquid storage container into the first chamber via the first line, and

[0068] b. The second chamber is provided with a second plunger, which can be operated by the motor to pump fluid from the second liquid storage container to the second chamber via the second line.

[0069] Preferably, the first and second liquid storage containers can be sealed containers. The liquid handling fitting may be provided with a third chamber that allows gaseous or air communication between the third chamber and the first and second sealed liquid containers. In this configuration, two lines branching from the third chamber to the first and second sealed liquid containers will be required. Alternatively, the liquid handling fitting may be provided with a third chamber and a third line, and a fourth chamber and a fourth line, respectively, the third chamber and the third line allowing gaseous or air communication between the third chamber and the first sealed liquid storage container for balancing the pressure in the first sealed liquid container, and the fourth chamber and the fourth line allowing gaseous or air communication between the fourth chamber and the second sealed liquid storage container for balancing the pressure in the second sealed liquid container. Attached Figure Description

[0070] Some embodiments of the invention will now be explained with reference to the accompanying drawings, in which:

[0071] Figure 1 This is a perspective view of a traditional floor cleaning device;

[0072] Figure 2 This example illustrates the inclusion of Figure 1 A schematic diagram of the liquid delivery components in the device;

[0073] Figure 3 This is a perspective view of an embodiment of a floor cleaning device according to one aspect of the present invention;

[0074] Figure 4 This example illustrates another aspect of the invention and includes Figure 3 A schematic diagram illustrating an implementation of a liquid delivery component in a device;

[0075] Figure 5A yes Figure 4 A three-dimensional view of the liquid delivery fittings;

[0076] Figure 5B yes Figure 5A Exploded view of the liquid conveying components;

[0077] Figure 6 yes Figure 5A A perspective view of the liquid delivery fitting, but its top and middle covers have been removed;

[0078] Figure 7A yes Figure 5A An exploded view of the liquid delivery fitting, but its top cover has been removed;

[0079] Figure 7B yes Figure 7A A schematic diagram of a liquid conveying component;

[0080] Figure 8A This is an example shown in Figure 5A A schematic diagram of the different chambers (or sections) defined in a liquid delivery fitting;

[0081] Figure 8B and Figure 8C yes Figure 5A A schematic diagram of a liquid delivery fitting, but its lower part has been removed;

[0082] Figure 9A This is an example shown in Figure 5A A schematic diagram of the different chambers (or sections) defined in a liquid delivery fitting;

[0083] Figure 9B and Figure 9C yes Figure 5A A schematic diagram of a liquid delivery fitting, the lower part of which has also been removed;

[0084] Figure 10A This is an example shown in Figure 5A A schematic diagram of the different chambers (or sections) defined in a liquid delivery fitting;

[0085] Figure 10B yes Figure 5A A schematic diagram of a liquid delivery fitting, the lower part of which has also been removed;

[0086] Figure 11 This example illustrates the operation via Figure 5A A schematic diagram of the liquid flow path of the liquid conveying fitting;

[0087] Figure 12 This example illustrates the operation via Figure 5A A schematic diagram of the air or gas flow path of a liquid conveying fitting;

[0088] Figure 13A and Figure 13B This example illustrates Figure 5A A schematic diagram of two different states of a liquid conveying accessory;

[0089] Figure 14A , Figure 14B and Figure 14C This example illustrates Figure 5A A schematic diagram showing three different states of a liquid conveying fitting; and

[0090] Figure 15A and Figure 15B They are Figure 2 A side-by-side diagram of traditional and new liquid conveying components. Detailed Implementation

[0091] Figure 1A perspective view of a conventional floor cleaning device 2 is shown. The device includes a cleaning head portion 4, an upright portion 10, and a handle portion 12. The cleaning head portion 4 is provided with two nozzles 6, 8 arranged on opposite sides to dissipate liquid detergent forward. The upright portion 10 is equipped with a container 14 in the form of a liquid detergent reservoir and components or fittings 16 for controlling the delivery of liquid detergent from the reservoir to the nozzles 6, 8 for forward dispensing. Figure 2 (as indicated in the text). The conveying component 16 includes multiple cylinders or independent devices provided in separate locations within the device 2, but additionally connected together by parts such as conduits, pipes, lines, etc.

[0092] Figure 2 It is an overview Figure 1 A schematic diagram of the operation of the delivery component 16 of device 2. The delivery component 16 includes a container A (14) for storing liquid detergent, a pump B, a distributor C for branching or directing the passing liquid detergent to corresponding nozzles D1, E1 for discharge, and a valve component F for allowing air into container A for pressure equalization. Pump B is located in the upright portion 10 of device 2. Distributor C is located in the cleaning head portion 4 of device 2 and is provided therein with a one-way valve to minimize leakage of liquid detergent from pump B to nozzles D1, E1 when device 2 is not in use and / or when the cleaning head portion is in an inclined position. Although both pump B and valve component F can be located in the upright portion 10, it should be noted that pump B and distributor C are located in different parts of device 2 and are connected by conduits D, E and G. For example, when the user is using the device, pump B is operated, while the valve component is operated separately and passively when the pressure in container A drops. Device 2 or delivery component 16 often presents several problems. First, with pump B, distributor C, and valve component F positioned and / or operating separately, the construction and assembly of delivery component 16 and device 2 are technically complex in terms of manufacturing device 2. Second, since valve component F operates passively and is connected to container 14 filled with a typically viscous liquid detergent, the inlet or check valve of valve component F leading to container 14 often experiences "sticking" problems, meaning that the inlet or check valve often becomes clogged or malfunctions over time as the liquid detergent dries there. Third, the non-independent delivery of liquid detergent to the two nozzles 6, 8 also reduces reliability. These are just some of the problems.

[0093] Figure 3A perspective view of an embodiment of a floor cleaning device 102 according to one aspect of the present invention is shown. The device 102 includes a cleaning head portion 104, an upright portion 110, and a handle portion 112. The cleaning head portion 104 has two nozzles 106, 108 arranged on opposite sides thereon for forward dispensing liquid detergent. The upright portion 110 is fitted with a container 114 in the form of a sealed reservoir for the liquid detergent and an accessory 116 for controlling the delivery of the liquid detergent from the reservoir to the nozzles 106, 108 for forward dispensing.

[0094] Figure 4 This is a schematic diagram of an embodiment of a liquid delivery fitting 116 according to another aspect of the invention. The delivery fitting 116 includes a container A' (or a sealed liquid container 146) for liquid detergent, a pump unit B', conduits D' and E' for corresponding nozzles D1' (106) and E1' (108), components for branching the flow of fluid to conduits D' and E', and a valve component F' for allowing air to enter the container A' (146) to balance the pressure. Further details of the device 102 and fitting 116 are explained below.

[0095] Figure 5A This is a schematic diagram illustrating the construction of a liquid delivery fitting 116, or at least a majority of the construction of fitting 116. Fitting 116 is in the form of an integrated operating system having: a first line 118 allowing fluid from container 114 to communicate with fitting 116; a second line 120 allowing ambient air or gas to communicate via fitting 116 to deliver fluid to container 114 to balance the pressure in container 114; fluid outlets 122, 124; a battery (not shown); and a motor 126 powered by the battery for operating the fluid flow and air or gas flow in fitting 116. In this embodiment, the sealed liquid container A' (146) has a cap made of a self-sealing silicone membrane material. Both the first and second lines are in the form of rigid metal tubes (e.g., steel pipes) with sharp ends. With this configuration, lines 118, 120 can be inserted into container A' (140) via the cap, and then a liquid-tight seal is automatically formed around lines 118, 120.

[0096] Figure 5B yes Figure 5A An exploded view of the accessory is shown. As illustrated, accessory 116 includes a housing 128 for accommodating a motor 126 and a three-cylinder arrangement. The three cylinders in this arrangement are actuated by three plungers 130, 132, and 134, respectively. Plungers 130, 132, and 134 are analogous to three pumps that can be driven by the motor 126. Housing 128 is provided with a circumferential flange 129. Accessory 116 is provided with a lower cover 137 in which plungers 130, 132, and 134 are disposed, and housing 128 engages with the lower cover.

[0097] Figure 6 yes Figure 5A The figure shows a perspective view of the lower portion of accessory 116, but housing 128 is removed. Three plungers 130, 132, and 134 are shown more clearly in this figure. A wall 136 defines a lower surface, the tops of which engage and connect to the lower surface. Plungers 130, 132, and 134 are actuated by a pivot plate 146, which is movable via the shaft of motor 126.

[0098] Figure 7A yes Figure 6 An exploded perspective view of the lower part of accessory 116, but with a middle cover 138. A bottom view of the middle cover 138 is shown. Figure 7B Roughly corresponding to Figure 7A However, a top view of the middle cover 138 is also shown. (Note that in this specification, references to "top," "bottom," etc., refer to their relative positions and are not intended to limit absolute orientation.) The bottom surface of the middle cover 138 is provided with three recesses 130a, 132a, and 134a. Therefore, it can be understood that cavities are provided or defined at the recesses 130a, 132a, and 134a between the middle cover 138 and the wall 136. In this embodiment, three chambers are typically defined between the middle cover 138 and the three plungers 130, 132, and 134. The three cylinders mentioned above correspond to these three regions. The three cylinders include two cylinders for fluid transport and one cylinder for air or gas transport. The three regions are region 140, region 142, and region 144.

[0099] A one-way valve 140a is provided in the middle cover 138 at region 140 to allow one-way fluid to flow through the middle cover 138 from top to bottom via opening 140b. A one-way valve 140c is also provided in the middle cover 138 at region 140 to allow one-way fluid to flow through the middle cover 138 from bottom to top via opening 140d. Figure 7B The operation of plunger 130 is illustrated. Please refer to the plunger 130 indicated by the dashed line. The arrows illustrate that when plunger 126 is operated by motor 126 via swivel plate 146, fluid flows from top to bottom through middle cover 138 through opening 140b, and then from bottom to top through middle cover 138 via opening 140d.

[0100] Region 142 of the middle cover 138 is similar to region 140 because region 142 is also provided with a one-way valve 142a to allow one-way fluid to pass through the middle cover 138 from top to bottom via opening 142b. A one-way valve 142c is provided in the middle cover 128 at region 142 to allow one-way fluid to pass through the middle cover 138 from bottom to top via opening 142d. The flow of fluid in region 142 is caused by a plunger 132 operated by the same motor 126.

[0101] Region 144 of the middle cover 138 differs to some extent from regions 140 and 142. Structurally, it is equipped with a one-way valve 144c (see...). Figure 7B Functionally, the one-way valve 144c is configured to allow one-way gas or air to pass through the middle cover 138 from bottom to top via the opening 144d. Although in Figure 7A and Figure 7B Not shown, however, region 144 is provided with an air inlet 164 at wall 136 to allow air or gas to enter the chamber between or defined by the middle cover 138 and the plunger 134.

[0102] Therefore, it can be understood that due to the presence of the two chambers corresponding to regions 140 and 142, fitting 116 defines two fluid flow paths. It can also be understood that due to the presence of the one chamber corresponding to region 144, fitting 116 defines one air or gas flow path. The two fluid chambers and one air / gas chamber, along with the corresponding plungers 130, 132, and 134, can therefore be understood as a three-cylinder arrangement.

[0103] Figure 8A There are two schematic diagrams, namely the left and right diagrams, illustrating when accessory 116 is in operation. Figure 7A The two states of region 140 of the middle cover 138 shown. Specifically, Figure 8A (Right) shows a top view of the middle cover 138 in operation, while Figure 8A (Left) shows a bottom view of the middle cover 138 in operation.

[0104] Figure 8B and Figure 8C Is with Figure 8A (Right) Two corresponding diagrams. It is important to note that... Figure 8B and Figure 8C Not only showed Figure 7A and Figure 7B Accessory 116, and accessory 116 with top cover 148 is shown. Thus, Figure 8B and Figure 8CA further example illustrates a chamber defined between a top cover 148 and a middle cover 138, and fluidly communicating from container 114 via a first conduit 118 to a subsequent chamber. Figure 8B It is understood that the middle cover 138 and the top cover 148 together define the chamber 150 between them. When fluid is drawn from the container 114 to the fitting 116 via the first line 118, the fluid first reaches the chamber 150. Figure 8A The gray area in (right) illustrates the upper surface of the middle cover 138 and the area between the top cover 148 and the middle cover 138 when chamber 150 is filled with fluid. Fitting 116 also provides chambers 152 and 154 between the middle cover 138 and the wall 136. Chambers 152 and 154 are the areas between the middle cover 138 and the wall 136. Fitting 116 is configured such that fluid in chamber 150 can then be conveyed and branched via openings 140b and 142b to chambers 152 and 154 respectively. Figure 8B and Figure 8C The arrows in the diagram illustrate the fluid flow pattern when accessory 116 is in operation. Figure 8A The gray area in (left) illustrates chambers 152 and 154 filled with fluid transferred from chamber 150.

[0105] Figure 9A There are two schematic diagrams, namely the left and right diagrams, illustrating when accessory 116 is in operation. Figure 7A The two states of the middle cover 138 shown.

[0106] Figure 9B and Figure 9C Is with Figure 9A (Left) Two corresponding schematic diagrams illustrate the fluid communication from chambers 152 and 154 to nozzles 122 and 124, respectively. From Figures 8A-8C In this process, after the fluid has reached chambers 152 and 154, the continuous operation of plungers 130 and 132 will drive the fluid out of chambers 152 and 154 via openings 140d and 142d, and then via valves 140c and 142c, respectively. The fluid will then exit nozzles 122 and 124, respectively. Nozzles 122 and 124 are arranged on or extend from opposite sides of the top cover 148. Figure 9C The arrows in the diagram illustrate the subsequent fluid flow pattern when accessory 116 is in use.

[0107] Figure 10A This is an example. Figure 7A The diagram shows the state of the middle cover 138. Figure 10B Is with Figure 10AThe corresponding schematic diagram illustrates the air or gas communication path from the surrounding area to the second conduit 120. A chamber 160 is provided in region 144 between the top cover 148 and the middle cover 138, as if... Figure 10A The gray area is shown in the image. Figure 10B An air inlet 164 at wall 136 is shown for allowing ambient gas or air to enter; a one-way valve 144c for controlling the state of the orifice 144d at the middle cover 138 to control the entry of ambient gas into chamber 160; and a one-way valve 162 for controlling the transfer of air or gas from chamber 160 to container 114 via line 120. Figure 10B The arrows in the diagram illustrate the airflow path.

[0108] respectively with Figure 9C and Figure 10B Corresponding Figure 11 and Figure 12 This is a schematic diagram illustrating the simultaneous fluid flow and gas / air flow when accessory 116 is in operation.

[0109] To further explain the structure and operation of accessory 116 Figures 13A-13B and Figures 14A-14B The structure of the accessory is illustrated. For ease of understanding, it should at least be related to... Figure 7A Let's review Figures 13A-13B and Figures 14A-14B .

[0110] generally, Figures 13A-13B Two configurations of the fluid transfer mechanism in accessory 16 are illustrated when fluid transfer occurs in the accessory.

[0111] Figure 13A An example of accessory 116 is shown, which includes a chamber 150 and a line 118 for supplying fluid to chamber 150 and then separately to chambers 152 and 154. Chamber 150 is provided with a single valve 140a for controlling the state of orifice 140b and a single valve 142a for controlling the state of orifice 142b.

[0112] Chamber 152 is provided with a sub-chamber 152a extending therefrom and a single valve 140c for controlling the state of orifice 140d. Sub-chamber 152a is also provided with a spring-loaded valve 156 for controlling orifice 156a before fluid leaves nozzle 122.

[0113] Similar to chamber 152, chamber 154 also has a sub-chamber 154a extending therefrom and a single valve 142c for controlling the state of orifice 142d. Sub-chamber 154a is also provided with a spring-loaded valve 158 for controlling orifice 158a before fluid leaves nozzle 124.

[0114] Figure 13A The accessory 116 in a first configuration is shown. In this configuration, when the first end of the swing plate 146 causes the plunger 130 used in chamber 152 to be in a low position, a suction effect (i.e., a pressure drop) is generated, causing the one-way valve 140b to open to allow fluid to be transferred from chamber 150 to chamber 152 via orifice 140b. Simultaneously, suction closes the one-way valve 140c.

[0115] When one end of the oscillating plate 146 causes the plunger 130 for chamber 152 to be in a low position, the second end of the oscillating plate 146 causes the plunger 132 for chamber 154 to be in a high position. As a result, a blowing effect (i.e., pressure increase) is generated, which causes the one-way valve 142a to close and the one-way valve 142c and the spring-loaded valve 158 to open, so that fluid is allowed to be transferred from chamber 154 to sub-chamber 154a via orifice 142c and then via orifice 158a, and then to nozzle 122.

[0116] Figure 13B The accessory 116 in a second configuration is shown. In this configuration, when the plunger 130 is now in a high position due to the third end of the oscillating plate 146, a blowing effect is generated, causing the one-way valve 140a to close and the one-way valve 140c and the spring-loaded valve 156 to open, allowing fluid to be conveyed from chamber 152 to sub-chamber 152a via orifices 140d and 156a, and then to nozzle 122. It is conceivable that the oscillating plate 146 has a trident profile, with the three prongs engaging the plungers 130, 132, and 134 respectively.

[0117] When the plunger 130 is in a high position due to the first end of the oscillating plate 146, the plunger 132 is now in a low position due to the second end of the oscillating plate. As a result, suction occurs, causing the check valve 142d to open, allowing fluid to be transferred from chamber 155 to sub-chamber 154 via orifice 142b. Simultaneously, suction closes the check valve 142c.

[0118] When the oscillating plate 146 connected to the plungers 130 and 132 pushes and pulls back and forth, the plungers 130 and 132 are in alternating positions, thus pumping fluid through the line 118 to the chamber 150, then branching to the chambers 152 and 154, then to the sub-chambers 142a and 154a, and finally to the nozzles 122 and 124 respectively.

[0119] Figures 14A to 14C Three configurations of the air or gas delivery mechanism in accessory 116 are shown for balancing the pressure in container 114 when accessory 116 is in operation. Specifically, Figures 14A to 14CIt is shown that accessory 116 includes a chamber 160 defined between a top cover 148 and a middle cover 138, a plunger 134 for operating the chamber 160, an inlet 164 leading to the chamber 160, a one-way valve 144c for controlling the entry of ambient air or gas into the chamber 160, and a one-way valve 162 for controlling the delivery of air from the chamber 160 to the container 114 via a line 120.

[0120] Figure 14A A first configuration of the pressure balancing mechanism is illustrated, in which plunger 134 is in its low position. This low or initial position of plunger 134 generates suction and causes both check valves 144c and 162 to close simultaneously with the opening of inlet 164.

[0121] Figure 14B As an example, when the plunger 134 moves upward through the first end (or fork) of the swing plate 146, an initial pumping effect is generated, and as a result, the inlet 164 closes while the two check valves 144c, 162 open.

[0122] Figure 14C As illustrated, once both check valves 144c and 162 are open, the lower pressure or negative pressure in chamber 160 causes inlet 164 to also open, allowing air to be transferred from the surrounding environment into container 114, thus replenishing the pressure loss in the sealed liquid container. The pressure in container 114 is continuously replenished and maintained as plunger 134 is reciprocated by the swing plate 146. It should be understood that the displacement of the cylinder formed by chamber 160 does not need to match the displacement of the cylinder formed by chambers 150, 152, and 154, because due to the negative pressure, a corresponding amount of air will be automatically drawn into the sealed liquid detergent container 114 until pressure equilibrium is reached.

[0123] It should be noted that all three plungers 130, 132, and 134 are alternately operated by these distal ends (or forks) of the swing plate 146. Therefore, when fitting 116 discharges liquid from the sealed liquid container 116 via conduits 122 and 124, the pressure drop in the sealed liquid is replenished, and fluid flow from container 114 to chamber 150 is unimpeded.

[0124] Figure 15A and Figure 15B Corresponding to Figure 2 and Figure 4 However, they are shown side by side for easy comparison. Figure 15A This refers to the liquid delivery component 16. Within this component 16, three separate units are provided: a pump B, a distributor C, and a valve component F. With this configuration, when the pump B is actively operated, the distributor C and valve component F are passively operated.

[0125] Figure 15B This refers to liquid delivery fitting 116. In this fitting 116, pump B', components for branching fluid to conduits D' and E', and valve component F' are integrally formed. In other words, they are part of a discrete unit. For example, fitting 116 provides multiple cylinders and chambers separated by partitions, and the operation of the cylinders, as well as the fluid and air flow within the integral fitting 116, is accomplished by a single motor. Furthermore, floor cleaning section 104 does not have any branching devices for directing fluid to the two nozzles 106 and 108. The branching function is already provided by the integral fitting 116 mounted in the upright section 110 of device 102. Although an additional check valve is not required in floor cleaning section 104, fluid leakage is prevented by the independent valves 140d, 156, 142c, and 158 in fitting 116 in the upright section 110. This configuration allows fitting 116 to be more compact, and from an industrial engineering perspective, mounting fitting 116 to the rest of device 102 is technically more efficient.

[0126] In the above embodiments, accessory 116 typically employs a three-cylinder arrangement with chambers (e.g., chambers 150, 152, 154, 160, etc.) arranged adjacent to each other and spacers (e.g., top cover 148, middle cover 138, etc.). This three-cylinder arrangement forms a larger cylindrical structure. However, the invention includes alternative embodiments. For example, the three chambers 152, 154, 160 can be arranged in a radial configuration. As another example, the three chambers 152, 154, 160 can be arranged linearly or in a V-shape. Furthermore, other alternative embodiments are possible when only two hydraulic cylinders are required (operated by a single motor), when only one hydraulic cylinder and one air / gas cylinder (operated by a single motor) are required, and / or when three hydraulic cylinders are required.

[0127] In the above embodiment, the oscillating plate 146 serves as an actuator for pivotally moving on the plungers 130, 132, and 134. In alternative embodiments, other forms of actuators for providing reciprocating or vibratory motion to the plungers 130 and 132 driven by the motor 126 will also be used.

[0128] In the above embodiments, plungers 130, 132, and 134 serve as diaphragm pumps to achieve fluid and air / gas flow. It is conceivable that other types of diaphragm pumps or pumps could also function similarly.

[0129] Figures 13A to 13B The illustration shows chamber 150 located above chambers 152 and 154. However, in other embodiments, chamber 150 may be located, for example, on an adjacent side of chambers 152 and 154.

[0130] It should be understood that certain features of the invention described in separate embodiments for clarity may be provided in combination in a single embodiment. Conversely, various features of the invention described in separate embodiments for brevity may be provided separately or in any suitable sub-combination. It should be noted that certain features of the embodiments are illustrated by way of non-limiting example. For example, an arrangement may be provided having two sealed liquid containers and two fluid cylinders (both operable by a single motor) to allow delivery of two different fluid streams, which are then combined to form a formulation for discharge.

Claims

1. A floor cleaning device, the floor cleaning device comprising: A cleaning head portion for engaging a floor surface during cleaning; An upright portion for maneuvering movement of the cleaning head portion; A liquid delivery assembly; A handle portion extending from the upright portion; and a sealed liquid storage container, wherein the cleaning head portion comprises a first nozzle and a second nozzle arranged on laterally opposite ends for discharging cleaning detergent therefrom forwardly, wherein the liquid delivery assembly comprises: - a first chamber, - a first line allowing fluid communication between the sealed liquid storage container and the first chamber, - a second chamber located in proximity to the first chamber, - a first conduit allowing liquid to exit from the second chamber to the first nozzle for discharge, - a third chamber located in proximity to the first chamber, - a second line allowing gas communication between the third chamber and the sealed liquid storage container, - an inlet allowing gas to enter the third chamber and then the liquid storage container, - a fourth chamber located in proximity to the first chamber, and - a second conduit allowing liquid to exit from the fourth chamber to the second nozzle for discharge, wherein: a. the first chamber is provided with a first orifice for fluid communication with the second chamber, the first orifice being reciprocally closable by a first one-way valve, b. the first chamber is provided with a second orifice for fluid communication with the fourth chamber, wherein the second orifice is reciprocally closable by a second one-way valve, and c. the second chamber and the fourth chamber are respectively provided with a third one-way valve and a fourth one-way valve for separately controlling the flow of liquid to the first conduit and the second conduit, respectively.

2. The floor cleaning device of claim 1, wherein, the second chamber and the fourth chamber are respectively provided with a first spring-loaded valve and a second spring-loaded valve for minimizing leakage of liquid from the first conduit and the second conduit, respectively.

3. The floor cleaning device of claim 1, wherein, the second chamber and the fourth chamber are respectively provided with a first plunger and a second plunger, the first plunger and the second plunger being operable by one motor for pumping fluid from the sealed liquid storage container to the first and second nozzles for discharge, respectively.

4. The floor cleaning device of claim 3, wherein, the third chamber is provided with a third plunger, the third plunger being operable by the one motor for pumping gas into the third chamber via the inlet and then into the sealed liquid storage container via the second line for equalizing pressure in the sealed liquid storage container.

5. The floor cleaning apparatus of claim 1, wherein, the third chamber is provided with a fifth one-way valve for controlling gas into the third chamber, and a sixth one-way valve for controlling the gas from the third chamber to the sealed liquid storage container for equalizing pressure in the liquid storage container.

6. The floor cleaning apparatus of claim 4, wherein, the liquid delivery assembly comprises a fifth chamber housing the first, second and third plungers and the one motor, and wherein the fifth chamber comprises a pivotable plate movable by the one motor and for alternately actuating on the first, second and third plungers, thereby creating pumping action.

7. The floor cleaning device of claim 1, wherein, The cleaner head portion is devoid of any check valve for controlling leakage of liquid from the first nozzle and / or the second nozzle when the floor cleaning device is not in use.

8. A liquid delivery fitment for controlling the flow of liquid from a sealed liquid storage container to a first nozzle, the fitment comprising: - a first chamber, - a first line allowing fluid communication between the sealed liquid storage container and the first chamber, - a second chamber located in the vicinity of the first chamber, - a first conduit allowing liquid to exit from the second chamber for discharge by the first nozzle, - a third chamber located in the vicinity of the first chamber, - a second line allowing gas communication between the third chamber and the sealed liquid storage container, and - an inlet allowing gas to enter the third chamber and then the liquid storage container, wherein: a. the first chamber is provided with a first orifice allowing fluid communication with the second chamber and the first orifice is reciprocally closable by a first one-way valve, b. the second chamber is provided with a second orifice reciprocally closable by a second one-way valve for controlling the flow of fluid to the first nozzle; c. the second chamber is provided with a first plunger operable by one motor for pumping fluid from the sealed liquid storage container to the first chamber via the first line, then to the second chamber via the first orifice, and then via the second orifice, and d. the third chamber is provided with a second plunger operable by the one motor for pumping the gas to the third chamber via the inlet, then to the sealed liquid storage container via the second line for equalizing the pressure in the sealed liquid storage container.

9. The fitment of claim 8, wherein, The second chamber is provided with a first sub-chamber extending therefrom, and wherein the first sub-chamber is provided with a third orifice reciprocally closable by a first spring-loaded valve for minimizing leakage of liquid from the first line.

10. The fitment of claim 8, wherein, The third chamber is provided with a third one-way valve for controlling the entry of gas into the third chamber, and a fourth one-way valve for controlling the passage of gas from the third chamber to the sealed liquid storage container for equalizing the pressure in the liquid storage container.

11. The fitment of claim 8, the fitment comprising: - a fourth chamber located in the vicinity of the first chamber, and - a second conduit allowing liquid to exit from the fourth chamber for a second nozzle, wherein: a. the first chamber is provided with a fourth orifice allowing fluid communication with the fourth chamber and the fourth orifice is reciprocally closable by a fifth one-way valve, b. the fourth chamber is provided with a fifth orifice reciprocally closable by a sixth one-way valve for controlling the flow of fluid to the second nozzle, c. the fourth chamber is provided with a second plunger operable by the one motor for pumping fluid from the sealed liquid storage container to the fourth chamber via the first line, then to the second chamber via the fourth orifice, and then via the fifth orifice, and d. the third chamber is provided with a third plunger operable by the one motor for pumping the gas to the third chamber via the inlet, then to the sealed liquid storage container via the second line for equalizing the pressure in the sealed liquid storage container. c. the fourth chamber is provided with a second sub-chamber extending therefrom, and the second sub-chamber is provided with a sixth orifice that is closable by a second spring-loaded valve for minimizing leakage of liquid from the second conduit, and d. the fourth chamber is provided with a third plunger that is operable by the one motor for pumping fluid from the sealed liquid reservoir to the first chamber via the first line for the second nozzle.

12. The accessory of claim 11, comprising a fifth chamber that houses the first, second and third plungers and the one motor, the fifth chamber including a pivotable plate that is drivable by the one motor and for alternately actuating on the first, second and third plungers for creating pumping actions.

13. The fitment of claim 11, wherein, The first and fifth one-way valves are configured to allow one-way fluid flow from the first chamber to the second chamber and from the first chamber to the fourth chamber, respectively.

14. A floor cleaning device comprising: a cleaning head portion for engaging a floor surface during cleaning; an upright portion for manipulating movement of the cleaning head portion ； the liquid delivery accessory of claim 11; a handle portion extending from the upright portion; and the sealed liquid reservoir, wherein the cleaning head portion includes the first and second nozzles arranged on laterally opposite ends thereof for expelling cleaning detergent therefrom forwardly.

15. The floor cleaning device of claim 14, wherein, In sequence, the sealed liquid reservoir, the first line, the first chamber, the second chamber, the first conduit and the first nozzle together define a liquid flow path.

16. The floor cleaning device of claim 14, wherein in sequence, the sealed liquid reservoir, the first line, the first chamber, the fourth chamber, the second conduit and the second nozzle together define a liquid flow path.

17. The floor cleaning device of claim 14, wherein in sequence, gas, the inlet, the third chamber, the second line and the sealed liquid reservoir together define a gas flow path.

18. The floor cleaning apparatus of claim 14, wherein, The cleaning head portion is devoid of any check valve for controlling leakage of liquid from the first nozzle when the floor cleaning device is not in use.

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