Reversible Piston Pump for Simultaneous Sampling and Dispensing

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Solution Overview

Problem

Existing multiple-sample processors are limited to either sampling or dispensing, lacking the capability to perform both functions simultaneously and efficiently, especially in harsh environmental conditions without direct power supply.

Innovation Solution

The design incorporates piston pumps connected to two spiral springs, which can be configured as either extension or compression springs, allowing each piston to be reversibly set for either sample intake or dispensing by a simple release lever mechanism triggered by a rotatable shaft, enabling fully automatic and modular operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single piston pump is used for either sampling or dispensing, then the device structure is simple, but the device cannot perform both sampling and dispensing functions simultaneously

Engineering Contradiction:

Improvedual function capabilityVSAvoidpump structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The piston pump is designed with a reversible piston that can be positioned in two orientations: one for sampling mode and one for dispensing mode. The same pump structure serves both functions by simply reversing the piston position, eliminating the need for separate sampling and dispensing pumps.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The piston is made reversible and can be repositioned between two stable states using a release lever mechanism. This dynamic reconfiguration allows the pump to switch between sampling and dispensing functions without permanent structural changes or additional components.

Inventive Principle:

Principle #15Dynamics

2Duration of action of moving object

If motorized means are used to displace pistons, then precise control is achieved, but the device requires direct power supply which limits autonomous operation duration

Engineering Contradiction:

Improveautonomous operation durationVSAvoidcontrol precision

Core Design Contradiction:

Duration of action of moving objectVSEase of operation

Solution Approach 1:

Spiral springs are pre-loaded and stored in a tensioned state during device assembly. The springs are held in this pre-charged state by a locking mechanism until needed, at which point they automatically discharge to drive the piston, providing precise control without requiring power during operation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The spring-driven mechanism is self-powered, using the stored elastic energy in the springs to drive the piston. This eliminates the need for external power supply during sampling operations, enabling autonomous operation for extended periods while maintaining precise control through the mechanical spring force.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If multiple separate pumps are used for sampling and dispensing, then functional versatility is achieved, but the device size and power requirements increase

Engineering Contradiction:

Improvesampling and dispensing capabilityVSAvoiddevice weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

A single piston pump structure is designed to perform both sampling and dispensing functions by reversing the piston position. This eliminates the need for multiple separate pumps, significantly reducing device weight while maintaining full functional versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The sampling and dispensing functions are merged into a single pump system. The same pump housing, seals, and mechanical structure are used for both functions, with only the piston orientation changing between modes, thereby minimizing overall device weight.

Inventive Principle:

Principle #5Merging (Combining)

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 configuration allows for simultaneous sampling and dispensing in a self-sufficient, cost-effective, and environmentally robust manner, enabling a series of processes with precise control over sample handling in various applications, including aquatic environments.

Implementation Method 1

Each piston is connected to at least one spiral spring by means of the free end of said piston that is remote from the sample opening, which spring is supported in the support frame and can be fixed in a tensioned initial position by means of a lock

Methodology Applied

Scientific EffectElastic potential energy storage and release: Spring

Data Source

PatentUS10393630B2Automated multiple sample processor having a plurality of piston pumps

Publication Date: 2019.08.27 ALFRED WEGENER INST HELMHOLTZ ZENT FUR POLAR & MEERESFORSCHUNG

AI summary

An automated multiple-sample processor for fluid samples includes a plurality of piston pumps which have a sample opening, a cylindrical housing and an axially displaceable piston and which are removably mounted in a support frame. The two spiral springs are both designed either as extension springs or as compression springs. In the case the two spiral springs are provided as the extension springs with a release lever in a first installation position, the triggering of the release lever results in the piston being pushed into the cylindrical housing. In the case the two spiral springs are provided as the compression springs with the release lever in a second installation position, which is rotated by 180° with respect to the first installation position, the triggering of the release lever results in the piston being pushed out of the cylindrical housing.