Stationary outlet stem pump
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing stationary stem piston pumps have complex constructions requiring multiple components, which complicates their design and functionality.
Innovation Solution
A simplified pump assembly comprising a piston chamber-forming body, a piston-forming element, and a one-way inlet valve, with a center post member and annular compartments that allow for fluid dispensing through a stationary center post, reducing the need for separate valves and enhancing ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional stationary stem piston pump design is used, then fluid dispensing functionality is achieved, but the construction becomes complex requiring multiple components
Solution Approach 1:
The patent merges the valve body, piston chamber, and discharge outlet into a single integrated piston chamber-forming body. The center post member integrates the discharge outlet and serves as both a structural support and fluid conduit. This consolidation eliminates the need for separate valve bodies and multiple connection components, directly reducing construction complexity while maintaining complete fluid dispensing functionality through the integrated architecture.
Solution Approach 2:
The piston chamber-forming body performs multiple functions simultaneously: it serves as the valve body, defines the piston chamber, provides the discharge outlet pathway, and contains the inlet and outlet ports. The center post member functions as both a structural support element and a fluid discharge conduit. This multi-functionality reduces the total component count while ensuring reliable fluid dispensing operation.
2Ease of manufacture
If multiple separate components are used, then fluid handling capabilities are maintained, but production costs increase
Solution Approach 1:
The patent combines what would traditionally be separate components (valve body, piston chamber, discharge outlet housing) into a single molded piston chamber-forming body. This consolidation reduces the number of parts that need to be manufactured, stored, and assembled, directly lowering production costs. The integrated design maintains all necessary fluid handling capabilities through strategically positioned ports and passages within the single component.
3Device complexity
If a simplified construction is used, then production costs are reduced, but fluid flow control may be compromised
Solution Approach 1:
The patent implements local quality by providing specific geometric features at critical locations: the piston-forming element has engagement surfaces positioned precisely to seal against the chamber wall and center post; the inlet port and outlet port are strategically located to optimize fluid flow paths; the center post includes a discharge outlet positioned for efficient fluid ejection. This localized optimization ensures effective fluid flow control is maintained despite the overall simplified construction.
Solution Approach 2:
The piston-forming element acts as an intermediary component that maintains effective fluid flow control while allowing the overall construction to remain simple. It provides the necessary sealing surfaces and flow regulation without requiring complex valve mechanisms or multiple control components. The piston's reciprocating motion, guided by the simplified chamber geometry, achieves efficient fluid displacement and flow control.
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 provides a more straightforward and efficient fluid dispensing mechanism, reducing complexity and potentially lowering production costs while maintaining effective fluid handling capabilities.
Implementation Method 1
An inlet one-way valve permits fluid flow into the compartment from the source of fluid but prevents fluid flow from the compartment to the source of fluid
Implementation Method 2
engagement between the piston-forming element and the chamber wall preventing fluid flow therebetween outwardly and inwardly
Implementation Method 3
Sliding of the piston-forming element inwardly relative the piston chamber-forming body reduces the volume of the compartment... Sliding of the piston-forming element outwardly relative the piston chamber-forming body increases the volume of compartment drawing fluid through the inlet one-way valve from the source of fluid into the compartment
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A pump assembly for dispensing flowable materials including a piston chamber-forming member providing an annular chamber about a center post and an annular piston-forming member reciprocally slidable in the annular chamber to dispense flowable material outwardly annularly about the center post.