Piston Pump Automatic Disable via Float Valve and Releasable Juncture
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Solution Overview
Problem
Existing piston pump arrangements fail to effectively stop the operation when one of the liquid sources is exhausted, leading to the discharge of either the concentrate or diluent alone, which can be hazardous and result in an unintended product, and lack simple and inexpensive mechanisms to ensure simultaneous cessation of dispensing when either liquid is depleted.
Innovation Solution
A piston pump arrangement featuring a float valve and a releasable juncture arrangement that couples and uncouples the driving member and piston based on fluid levels, creating a vacuum condition to prevent operation when either reservoir is empty, ensuring that both liquids are stopped from being dispensed when one is depleted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump continues to operate when liquid is exhausted, then the motorized actuator assembly is damaged due to increased resistance, but disabling the pump requires complex control mechanisms
Solution Approach 1:
The float valve automatically detects liquid level and closes to stop pump operation when liquid is exhausted, eliminating the need for external control mechanisms. The system serves itself by using the liquid level condition to directly control the valve state.
Solution Approach 2:
The float valve acts as an intermediary between the liquid level condition and the pump operation. It translates the liquid level into a mechanical closure action that directly stops the pump, providing a simple protective function.
2Reliability
If the pump dispenses liquid from one source when another source is exhausted, then the unintended product is discharged, but ensuring simultaneous cessation requires complex coordination mechanisms
Solution Approach 1:
Multiple float valves are integrated into a single valve body, allowing simultaneous control of multiple liquid sources. This merging approach ensures that if any liquid source is exhausted, the combined valve structure closes to stop all dispensing operations.
Solution Approach 2:
The valve body is segmented with separate inlet passages for different liquid sources, each controlled by its own float valve. This segmentation allows independent detection and control of each liquid level while maintaining coordinated operation through the unified valve structure.
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
Prevents continued operation and discharge of either concentrate or diluent alone, maintaining the intended product mixture by ensuring both liquids are stopped when either is depleted, thus avoiding hazards and ensuring the correct product is dispensed.
Implementation Method 1
the first float buoyant in the first fluid, the first float assuming the open condition when a level of the first fluid in the first conduit is above a predetermined first fluid float level, the first float assuming the closed position when a level of the first fluid in the first conduit is at or below the predetermined first float level
Implementation Method 2
with the first float in the open condition, the first float valve permitting for flow in the first conduit from the first reservoir to the first chamber, with the first float in the closed condition, the first float valve preventing flow in the first conduit from the first reservoir to the first chamber
Data Source
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AI summary
A piston pump arrangement that disables operation of the pump in the absence of an inlet liquid and also to a piston pump arrangement useful to discharge liquids from at least two sources and to disable discharge of all of the liquids when supply of liquid from at least one source is empty.