Cycle Indicator Piston Follower Leakage Prevention
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Solution Overview
Problem
Existing cycle indicators in high pressure, low volume fluid systems suffer from fluid leakage, reduced fluid volume due to piston follower size, and inability to accurately indicate piston travel, leading to potential damage and insufficient lubrication.
Innovation Solution
A cycle indicator with a sealed housing and piston follower that extends into the divider block cylinder without sealing, using magnets to provide a visual indication of piston movement through a clear window, ensuring accurate stroke measurement without fluid leakage or volume reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a piston follower extends through a seal to indicate piston cycles, then cycle indication is achieved, but fluid leakage occurs over time
Solution Approach 1:
The patent removes the seal component from the system by allowing the piston follower to extend through an open bore without sealing. This extraction of the seal eliminates the source of leakage while maintaining cycle indication functionality through an alternative design where the follower extends externally to actuate the indicator mechanism.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the piston follower and the indicator mechanism. A magnet on the piston follower interacts with a reed switch or Hall effect sensor to indicate cycles, eliminating the need for direct mechanical contact through a seal and thus preventing fluid leakage.
2Measurement precision
If a piston follower is used to indicate cycles, then cycle counting is enabled, but cylinder volume is reduced
Solution Approach 1:
The patent extracts the piston follower from the cylinder interior and positions it externally. The follower extends through an open bore rather than occupying space within the cylinder, thereby maintaining full cylinder volume for fluid dispensing while still enabling cycle indication through its external positioning and movement.
3Measurement precision
If prior art cycle indicators are used, then cycle occurrence is indicated, but piston travel distance is not measured
Solution Approach 1:
The patent incorporates a scale or measuring indicator that is pre-positioned alongside the piston follower's path of movement. This preliminary arrangement allows direct visual measurement of piston travel distance as the follower moves, providing both cycle occurrence indication and travel distance measurement simultaneously without requiring additional components.
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 solution effectively prevents fluid leakage, maintains cylinder volume, and provides a clear visual indication of piston travel, ensuring proper lubrication and system operation by accurately monitoring piston movement.
Implementation Method 1
A magnet on the piston follower activates a reed switch or Hall effect sensor to indicate a cycle of the divider block
Implementation Method 2
A magnet on the piston follower activates a reed switch or Hall effect sensor to indicate a cycle of the divider block
Data Source
AI summary
A cycle indicator is provided for monitoring movement of a fluid control piston of a divider block for a fluid distribution system. The cycle indicator connects to the divider block in a manner that allows fluid communication between the divider block and the cycle indicator. The cycle indicator includes a spring-biased piston follower that extends into the divider block through a housing so that movement of the fluid control piston is translated to the piston follower. The piston follower extends into the divider block through an opening in the housing. The opening is not sealed allowing fluid within the divider block cylinder to flow past the piston follower and into the housing. Since there is no relative movement between the seal and any moving part such as the piston follower fluid leakage is eliminated or at least substantially reduced. An internal magnet is coupled to the piston follower and activates an external magnet that provides a visual indication of the movement of the fluid control piston.