Multi-function Faucet Wand Mode and Flow Control
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Solution Overview
Problem
Existing faucet sprayheads lack versatility in water flow modes and rates, often limiting users to fixed stream or spray settings without adjustable flow options.
Innovation Solution
A multi-function faucet wand with a mode control valve allowing selection between stream and spray modes, and a flow control valve enabling adjustment between low and high flow rates, with an interlock ensuring the low flow rate is maintained in spray mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a faucet sprayhead provides multiple delivery modes (spray and stream), then the versatility of water flow modes is improved, but the device complexity increases due to multiple valves and control mechanisms
Solution Approach 1:
The patent combines the mode control valve and flow control valve into a single integrated valve assembly with a unified body structure. The mode control valve (with positions for stream and spray modes) and flow control valve (with positions for different flow rates) share common components including the valve body, actuator shaft, and control mechanism, thereby reducing overall device complexity while maintaining multiple delivery modes
2Loss of substance
If a flow control valve provides adjustable flow rates, then water usage efficiency is improved, but the device complexity increases due to additional valve mechanisms
Solution Approach 1:
The flow control valve is merged with the mode control valve into a single integrated assembly. The flow control valve includes a valve body with flow control openings and an actuator shaft that shares the same structural framework as the mode control valve, allowing adjustable flow rates (first and second flow rates) to be achieved without adding separate complex valve mechanisms
Solution Approach 2:
The integrated valve assembly serves multiple functions: it controls both the delivery mode (stream or spray) and the flow rate (first or second flow rate) through a unified control structure. This multi-functionality allows water usage efficiency to be improved while avoiding the complexity of separate dedicated valves for each function
3Loss of substance
If an interlock mechanism restricts flow rate based on delivery mode, then water usage efficiency is improved, but the ease of operation decreases due to limited user control
Solution Approach 1:
The interlock mechanism automatically restricts the flow control valve to the first flow rate position when the mode control valve is in the spray mode position, without requiring additional user input. The mechanical linkage between the mode control valve and flow control valve self-enforces the water usage efficiency constraint, while users retain full control through the normal operation of the two-valve system
Data Source
AI summary
A multi-function faucet wand configured to be removably supported by the delivery spout of a faucet. The faucet wand includes a mode control movable in response to user input from between a first position for directing water in an aerate mode, and a second position for directing water in a spray mode. A flow control is movable in response to user input from between a first position for providing a low flow rate of water, and a second position for providing a high flow rate of water.