Pump Piston Engagement Flange for Secure Removable Coupling

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Solution Overview

Problem

Existing fluid dispensers face challenges in ensuring the movable element remains properly aligned and secured within the actuator assembly, allowing for easy replacement and preventing misalignment, especially with varying shapes and sizes of movable elements.

Innovation Solution

Incorporating a resilient member that deflects to facilitate coupling and uncoupling of the movable element with the actuator mechanism, ensuring radial movement is restricted unless the resilient member is deflected, and using an annular shape within specific cavities to limit the size and shape of replaceable reservoirs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a coupling mechanism is designed to accommodate a wide variety of physical shapes and sizes of movable elements, then the adaptability of the dispenser is improved, but the ability to maintain proper alignment and prevent displacement is worsened

Engineering Contradiction:

Improveadaptability to various movable element shapes and sizesVSAvoidalignment maintenance and prevention of radial displacement

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The resilient member is designed with an asymmetric engagement geometry where the radially outwardly extending portion engages the catch member at a specific angular position. This asymmetric configuration provides a unique coupling orientation that ensures proper alignment while accommodating various movable element shapes and sizes, preventing radial displacement through the geometric constraint rather than universal compatibility.

Inventive Principle:

Principle #4Asymmetry

2Ease of operation

If the movable element is designed for easy removal and replacement, then the ease of operation is improved, but the security of coupling and prevention of accidental displacement is worsened

Engineering Contradiction:

Improveease of removal and replacementVSAvoidsecurity of coupling

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The resilient member incorporates dynamic engagement characteristics where the coupling security changes based on operational state. During normal operation, the resilient member maintains a secure engaged position with the catch member. For removal, the system allows intentional actuation that temporarily alters the engagement state, enabling easy detachment while maintaining security during正常使用.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The resilient member functions as a flexible elastic component that can deform to accommodate coupling and uncoupling operations. This flexibility allows the member to be deflected intentionally for easy removal while providing inherent elastic retention forces that secure the coupling during normal operation, preventing accidental displacement.

Inventive Principle:

Principle #30Flexible shells and thin films

3Ease of operation

If the resilient member is designed to be highly resilient for easy coupling, then the ease of operation is improved, but the control over engagement precision is worsened

Engineering Contradiction:

Improveease of couplingVSAvoidengagement precision and alignment control

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The engagement geometry between the resilient member and catch member is designed asymmetrically, creating a unique coupling orientation. This asymmetric design provides inherent alignment guidance that controls engagement precision, ensuring that even with high resilience allowing easy coupling, the movable element engages at the correct angular position with proper alignment.

Inventive Principle:

Principle #4Asymmetry

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 allows for easy and secure replacement of the reservoir, maintaining proper alignment and preventing radial movement unless the resilient member is deflected, ensuring efficient fluid dispensing and simplifying the replacement process.

Implementation Method 1

a resilient member which prevents radial movement of the movable element relative a catch member of the actuator mechanism from a coupled orientation unless the resilient member is deflected from an unbiased inherent configuration

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS8091739B2Engagement flange for fluid dispenser pump piston

Publication Date: 2012.01.10 OP HYGIENE IP GMBH

AI summary

An improved arrangement for removably coupling a movable element of a piston pump to an actuator mechanism with the movable element including a resilient member which prevents radial movement of the movable element relative a catch member of the actuator mechanism from a coupled orientation unless the resilient member is deflected from an unbiased inherent configuration.