Spa Jet Barrel Threading to Prevent Clip Pop-Out
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Solution Overview
Problem
Conventional spa jet assemblies experience failures due to continuous vibration, chemical corrosion, and high water pressure, causing the clips to pop out of the jet body over time.
Innovation Solution
A rotatable threadable connection between the jet internals and jet body, featuring a first threaded portion on the barrel and a second threaded portion within the jet body, along with a locking ring and detents, allows for controlled rotation to align or misalign the barrel inlet with the body inlet for on/off water flow control, preventing premature disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spring clips are used to join barrel to jet body, then assembly is easy to manufacture, but clips fail by popping out due to vibration, corrosion, and high water pressure
Solution Approach 1:
The connection system is divided into functional segments: the threaded barrel portion provides secure mechanical attachment, while the separate lock ring with detents provides positional stabilization. This segmentation allows each component to specialize in its function, preventing the barrel from popping out while maintaining ease of assembly.
Solution Approach 2:
The threaded connection is designed to engage the barrel with the jet body before the lock ring is installed. This preliminary action secures the barrel in place, preventing it from popping out during subsequent operation, while still allowing for easy removal when needed for maintenance.
2Ease of operation
If jet internals are rotatably connected to enable flow control, then water flow control is achieved, but continuous rotation may cause clips to disengage
Solution Approach 1:
The connection system transitions from a static clip-based design to a dynamic threaded connection that can accommodate rotational movement. The threads allow the barrel to rotate for flow control while maintaining secure attachment, and the lock ring with detents provides discrete positional stability at on and off positions.
Solution Approach 2:
The lock ring acts as an intermediary component between the threaded barrel connection and the jet body. It provides detents that engage with the barrel at specific rotational positions, enabling flow control through rotation while preventing the barrel from rotating too far and disengaging from the threaded connection.
3Productivity
If clips are used for quick assembly, then assembly speed is fast, but clips fail over time due to chemical corrosion and vibration
Solution Approach 1:
The connection system is divided into functional segments: the threaded barrel portion provides secure mechanical attachment, while the separate lock ring with detents provides positional stabilization. This segmentation allows each component to specialize in its function, preventing the barrel from popping out while maintaining ease of assembly.
Solution Approach 2:
The connection mechanism changes from a simple clip design to a threaded connection with angular displacement. The threads convert rotational motion into linear engagement, providing a more reliable connection that resists vibration and corrosion while still allowing for quick assembly and disassembly.
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
This design enhances the durability and reliability of the spa jet assembly by preventing the jet internals from popping out, while maintaining full control over water flow through deliberate rotational alignment and misalignment.
Implementation Method 1
The barrel comprises a first threaded portion and the jet body comprises a second threaded portion wherein the barrel is screwed in or threadably connected to the jet body for delimited rotation of the barrel to align and misalign the barrel inlet from the body inlet to control flow on and off respectively
Implementation Method 2
Further, air is automatically drawn in via an air-inlet port on jet body by a venturi action
Data Source
AI summary
A jet assembly has internals rotatably and releaseably fit to a jet body, such as that for a spa. The internals have a barrel housing, a rotor and a barrel inlet. The internals as screwed into the jet body. A first threaded portion outside the barrel threadably engages second threaded portion inside the jet body wherein the internals have delimited rotation therein to align and misalign the barrel inlet from a body inlet on the jet body to control flow on and off respectively. The threaded portion within the jet body can be a locking ring affixed therein by fasteners or integral with the jet body. Rotation can be delimited by a projection on the barrel and a cooperating annular delimiting surface on the locking ring, such as circumferentially-spaced detents.