Pressure-Relieving Pump Handle for Fine-Mist Hand Sprayers
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Solution Overview
Problem
Existing personal misting devices lack a clear indication of sufficient pressure for emitting a fine mist, often resulting in messy large drops when pressure is insufficient, and the pump handle may not properly seat under full pressure.
Innovation Solution
A handheld misting device with an integrated pump that includes a locking mechanism for proper handle seating, a pressure relief channel with a valve to prevent over-pressurization, and a relief aperture that indicates maximum pressure has been reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hand pump is directly attached to a small water tank for manual pressurization, then the device can be portably operated without external power, but the user cannot tell if sufficient pressure is reached without testing by opening the valve
Solution Approach 1:
The patent implements a pressure indicator mechanism that provides visual feedback to the user about the pressure status inside the tank. A pressure indicator is positioned to be visible through the pump handle, allowing the user to determine when sufficient pressure has been reached without needing to open the valve and test the spray. This feedback mechanism resolves the information loss problem while maintaining portable manual operation.
2Reliability
If the tank is pressurized to maximum level, then fine mist emission is achieved, but the pump handle may not properly seat in closed position due to pressure pushing it out
Solution Approach 1:
The patent segments the pump handle into multiple functional components: a handle body, a pressure indicator, and a sealing element. The sealing element is specifically designed to maintain proper seating position against the tank opening even under maximum pressure conditions. This segmentation allows the handle to reliably indicate fine mist emission pressure while maintaining stable closed position through the dedicated sealing component.
3Volume of moving object
If the pump handle is made compact for portability, then the device becomes easily transportable, but the handle cannot provide both pressure indication and proper sealing functions
Solution Approach 1:
The pump handle is designed as a multi-functional component that simultaneously performs three functions: (1) manual pressurization operation, (2) pressure status indication through a visible pressure indicator, and (3) sealing to maintain proper closed position under pressure. This universal design allows a compact handle to provide multiple functions without requiring separate components, thus maintaining portability while enhancing versatility.
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
The device effectively indicates when sufficient pressure is achieved for fine mist emission, prevents over-pressurization, and ensures proper handle seating even under full pressure, enhancing usability and performance.
Implementation Method 1
The pump further includes a pressure relief valve that releases air through the handle when the chamber is over-pressurized
Implementation Method 2
Evaporative coolers can be made to cool a localized area by emitting a mist into the area. Personal misting devices serve as evaporative coolers, spraying the mist onto a user's skin and in his vicinity; the evaporation of the mist provides the cooling effect
Data Source
AI summary
A handheld misting device, having a fluid tank that can be pressurized to force the contained fluid under pressure through a fluid delivery system, includes a hand-operated pump for injecting air into the fluid tank to pressurize the fluid tank. The pump includes a pump handle located at the bottom of the tank at one end of a rod, and a piston at the other end of the rod. The pump handle rotates in order to lock, in a retracted position, against the tank; the form factor of the handle conforms to that of the tank, to define an unbroken outer surface of the device when the handle is locked in the retracted position. A pressure-relieving air channel extends through the piston, the rod, and the pump handle to emit air out of the pump and into the environment when the fluid tank is at a maximum pressure.