Dispensing Pump Axial Alignment and Stroke Control
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Solution Overview
Problem
Existing fluid product pumps experience leaks and premature wear due to angular offset of the compression member, leading to inefficiencies and design complexities in producing pumps for varying fluid volumes.
Innovation Solution
The pump design incorporates a shoulder on the inner surface of the end member with a flange that abuts against it, ensuring the nozzle remains aligned with the central axis, providing distributed support and preventing leaks, while allowing for adjustable end stops to accommodate different fluid volumes without modifying the end member's design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a groove is used to limit the stroke of the compression member, then the stroke can be controlled, but the compression member becomes angularly offset causing leaks and premature wear
Solution Approach 1:
The patent introduces a collar as an intermediary component between the compression member and the end member. This collar includes a flange that abuts against a shoulder on the end member, providing guidance and preventing angular offset of the compression member during stroke limitation. The intermediary collar ensures that the compression member remains axially aligned while still limiting the stroke, thereby preventing leaks and premature wear without compromising the stroke control function
Solution Approach 2:
The patent divides the end member into multiple functional components: a body portion, a collar with flange, and a shoulder structure. This segmentation allows each component to perform its specific function - the body provides structural support, the collar provides guidance and stroke limitation, and the shoulder provides the abutment surface. By segmenting the design, the patent achieves reliable stroke control while maintaining proper alignment and preventing the angular offset that causes leaks and wear
2Adaptability or versatility
If the end member design is modified to accommodate different fluid volumes, then different pump models can be produced, but the manufacturing complexity and adaptation needs increase
Solution Approach 1:
The patent designs the end member with a universal collar and shoulder structure that can accommodate different compression member strokes while maintaining the same basic design. The collar with flange and shoulder configuration serves multiple functions: guiding the compression member, limiting stroke, and providing abutment surfaces. This universal design allows the same end member to be used across different pump models dispensing various fluid volumes, reducing manufacturing complexity and eliminating the need for design adaptations while maintaining 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
This design ensures reliable sealing, reduces wear, and simplifies the production of pumps for various fluid volumes by maintaining the same end member design across different models, reducing manufacturing complexity and adaptation needs.
Implementation Method 1
said compression member being elastically returned to the rest position
Data Source
Figure 1~2
Figure 3~4
AI summary
Pump for distributing a dose of fluid product, comprising: - a tubular body (1) having an inlet orifice (6), - an end member (14) associated with the body (1) and having a rest stop (37) and an end stop (39), - a compression member mounted movable inside the body (1) between a rest position, in which said compression member is against the rest stop, and an end position, in which said compression member is against the end stop, said compression member being elastically returned to the rest position and having an exhaust orifice, - a metering chamber (2), - an inlet valve and an exhaust valve (33) adapted to selectively close the inlet orifice (6) and the exhaust orifice respectively.