Dispenser Cap with Selectable Reservoirs and Mixing Chamber
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Solution Overview
Problem
Consumers face the inconvenience and cost of purchasing multiple individual containers of personal and home care products to achieve variety, as existing dispensing systems do not efficiently allow for the mixing and dispensing of multiple fluid options from a single container.
Innovation Solution
A dispensing cap with multiple secondary reservoirs that allows users to select and mix different secondary flowable substances with a primary fluid, utilizing a dual-piston arrangement and rotatable push-ring assembly to expel and mix the substances within a mixing chamber, which is then dispensed through a one-way valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple individual containers are purchased to obtain product variety, then product selection options increase, but cost and storage requirements increase
Solution Approach 1:
The patent combines multiple secondary reservoirs containing different fragrances or additives into a single dispensing cap, while the primary reservoir holds the base product. This merging allows consumers to access multiple product variants from one container system, eliminating the need to purchase and store multiple separate bottles, thereby reducing both cost and storage requirements while maintaining product variety
Solution Approach 2:
The dispensing cap is designed with multi-functionality by incorporating multiple secondary reservoirs that can be selectively activated. The rotatable push-ring assembly allows the same cap structure to dispense different combinations of primary and secondary fluids, making a single container system universal for multiple product formulations rather than requiring dedicated containers for each variant
2Adaptability or versatility
If multiple individual containers are purchased to obtain product variety, then product selection options increase, but convenience decreases
Solution Approach 1:
By merging multiple secondary reservoirs into a single dispensing cap with unified operation controls, the system allows users to access different product variants through one convenient interface rather than managing multiple separate containers. The rotatable push-ring and selective activation mechanism provide ease of operation while delivering product variety
Solution Approach 2:
The multi-functional dispensing cap enables users to select from multiple fragrances and additives through a single device with unified operation. The rotatable push-ring assembly and selective reservoir activation provide a convenient user interface that maintains ease of operation while delivering the versatility of multiple product options in one container
3Adaptability or versatility
If separate fluid compartments are squeezed from a common nozzle, then mixing of fluids is achieved, but device complexity increases
Solution Approach 1:
The patent segments the fluid storage into separate primary and secondary reservoirs with distinct functions. The primary reservoir holds the base product while secondary reservoirs contain additives or fragrances. This segmentation allows for controlled mixing through the piston mechanism rather than requiring complex pre-mixed compartments, achieving fluid mixing capability with manageable structural complexity
Solution Approach 2:
The mixing chamber acts as an intermediary between the separate fluid compartments and the dispensing nozzle. Fluids from different reservoirs are delivered to this intermediate mixing chamber where they combine before being dispensed, simplifying the overall structure by providing a dedicated mixing zone rather than requiring complex internal compartment arrangements
4Adaptability or versatility
If frangible membrane is broken to mix components, then mixing within container is achieved, but reliability decreases
Solution Approach 1:
The system uses self-service mixing where the user's normal dispensing action automatically activates the mixing process. When the user operates the dispenser, the piston mechanism is activated and simultaneously delivers fluids from both primary and secondary reservoirs to the mixing chamber, eliminating the need for separate activation steps or frangible membranes that could fail
Solution Approach 2:
The patent replaces the unreliable frangible membrane breaking mechanism with a positive-displacement piston system. The piston mechanically controls fluid delivery from both reservoirs, providing reliable and consistent mixing through controlled mechanical action rather than relying on membrane integrity and breakage timing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables convenient and cost-effective use of multiple product options within a single container, allowing users to mix and dispense various fragrances or substances with primary products like body wash or shampoo, reducing the need for multiple containers and enhancing user convenience.
Implementation Method 1
a first piston movable within the piston base for forcing a quantity of the primary fluid into the mixing chamber when the bottle is squeezed
Implementation Method 2
a second piston associated with a selected one of the plurality of reservoirs and movable within its respective reservoir for forcing a quantity of a selected secondary fluid into the mixing chamber
Implementation Method 3
The mixture is then dispensed from a dispensing end of the cap, ready for use
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A dispensing cap (1) is disclosed for mixing a primary flowable substance, such as a soap, lotion, or the like, with a small dose of a secondary flowable substance, such as a fragrance. The dispensing cap (1) includes a plurality of reservoirs (2a, 2b, 2c) containing a plurality of secondary flowable substances. Each of the reservoirs is associated with a secondary piston (14a, 14b, 14c) that, when actuated, causes the secondary flowable substance to be expelled from the reservoir into a mixing chamber (4) in the cap, where it is mixed with the primary flowable substance. Upon mixing the two are dispensed together from a dispensing end of the cap. A selector ring (36) is provided to enable the user to select one of the plurality of reservoirs. The selector ring (36) has an actuation flange (48) that aligns with the secondary piston that is associated with the selected reservoir. The selector ring (36) is engaged with the main piston so, as the primary flowable substance is introduced into the mixing chamber (4) via movement of the main piston, the selector ring and flange are pressed down onto the selected secondary piston, which expels a quantity of selected secondary flowable substance into the mixing chamber. The mixing chamber (4) may have mixing vanes or other physical features to enhance mixing of the primary and secondary flowable substances. The cap may have a lockout feature (200a, 200b, 200c) that prevents actuation if the selected reservoir is empty. The cap may also have a visual indicator that informs the user of a level of secondary flowable substance within the secondary reservoir.