Stationary outlet stem pump
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Solution Overview
Problem
Existing stationary stem piston pumps have complex constructions requiring multiple components, which complicates their design and functionality.
Innovation Solution
A simplified piston pump assembly with a piston chamber-forming member and a reciprocally slidable piston-forming element, featuring a one-way inlet and outlet valve system, which allows for efficient fluid dispensing through a stationary center post, reducing the need for separate valves and components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional stationary stem piston pump is used, then fluid dispensing function is achieved, but the construction becomes complex requiring multiple components
Solution Approach 1:
The patent combines multiple components into a simplified assembly where the piston chamber-forming member and piston-forming element work together as an integrated unit. The piston-forming element is reciprocally slidable within the piston chamber-forming member, eliminating the need for separate valve components and reducing overall construction complexity while maintaining reliable fluid dispensing function.
2Ease of manufacture
If multiple separate components are used, then fluid control is precise, but manufacturing and assembly become difficult
Solution Approach 1:
The invention merges the piston chamber and piston into a simplified two-element assembly that is easier to manufacture and assemble. The reciprocally slidable configuration allows for straightforward assembly while the precise fit between the piston-forming element and piston chamber-forming member maintains accurate fluid control during operation.
3Device complexity
If a simplified design with fewer components is used, then ease of construction improves, but component reliability may deteriorate
Solution Approach 1:
The patent achieves reliability with fewer components by creating an integrated piston assembly where the piston chamber-forming member and piston-forming element work together as a unified system. This reduction in component count eliminates potential failure points associated with multiple separate parts while maintaining reliable pump operation through the robust reciprocally slidable mechanism.
4Device complexity
If traditional valve systems are used, then fluid flow control is effective, but device complexity increases
Solution Approach 1:
The invention integrates valve functionality directly into the piston assembly, eliminating the need for separate valve components. The piston-forming element incorporates inlet and outlet valve mechanisms that work in conjunction with the reciprocating motion to control fluid flow effectively, thereby maintaining fluid dispensing efficiency while reducing overall device complexity.
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 simplified design enhances the pump's efficiency and ease of construction, allowing for effective fluid dispensing while minimizing component complexity, making it easier to recycle and maintain.
Implementation Method 1
A one-way outlet valve is provided to permit fluid flow from the first compartment to the second compartment but to prevent fluid flow from the second compartment to the first compartment. The one-way outlet valve is preferably provided by an outlet flexing disc carried by the piston that extends radially inwardly from the piston into sliding engagement with the post member axially inwardly of the transfer port.
Implementation Method 2
The inlet flexing disc about the central bore of the inlet flexing disc engaging the post side surface of the axially inner portion of the outer wall circumferentially thereabout preventing fluid flow axially inwardly between the inlet flexing disc and the post side surface but permitting fluid flow axially outwardly between the inlet flexing and the post side surface.
Implementation Method 3
An annular piston-forming element or piston is received in the annular compartment with engagement between the piston and the chamber wall preventing fluid flow outwardly therebetween... With reciprocal sliding of the piston in the body within the annular compartment of the chamber, fluid is drawn in the outward withdrawal stroke into the first compartment and is dispensed in the inward retraction stroke from first compartment into the second compartment.
Data Source
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.