Compact Pump Nozzle Piston Radial Support
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Solution Overview
Problem
Existing pumps with coaxial piston and nozzle configurations face challenges in reducing axial dimension, leading to bulkiness and reliability issues due to the need for large axial spacing for proper retention and sealing, which limits the production of compact pumps.
Innovation Solution
A pump design where the piston is mounted coaxially around the nozzle with an association zone allowing sliding and elastic prestressing, combined with a cup and bell structure for radial and lateral support, enabling compactness while maintaining sealing and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the piston and nozzle are mounted coaxially in a rigid manner with a contact zone of large axial dimension, then coaxial movement is guaranteed, but the pump becomes bulky and axial dimension increases
Solution Approach 1:
The patent transitions from axial support to radial support by introducing a cup structure that supports the nozzle assembly radially on its peripheral surface. This dimensional change eliminates the need for large axial contact zones while maintaining alignment stability through radial constraints.
Solution Approach 2:
The support function is segmented into two independent zones: radial support provided by the cup structure for alignment stability, and axial support provided by the bell structure. This segmentation allows each zone to optimize its support function without compromising the other, reducing overall axial dimension.
2Reliability
If two sealed support zones are provided at axially spaced positions, then retention and sealing are maintained, but the axial spacing increases the pump dimension
Solution Approach 1:
The patent moves one sealing function from the axial dimension to the radial dimension by providing radial sealing between the cup structure and the nozzle assembly's peripheral surface. This radial sealing works in conjunction with the axial sealing to maintain reliability while reducing axial spacing requirements.
3Length of stationary object
If the nozzle assembly is supported radially on the peripheral surface of the nozzle, then compactness is achieved, but additional structural elements are required
Solution Approach 1:
The cup structure performs multiple functions simultaneously: it provides radial support for alignment, radial sealing to maintain pressure, and structural connection between the nozzle assembly and the pump body. This merging of functions reduces the need for separate components, offsetting the added complexity with functional integration.
Solution Approach 2:
The bell structure serves multiple purposes: it provides axial support for the nozzle assembly, forms part of the dispensing pathway, and contributes to the overall structural integrity. This multi-functionality reduces the need for additional dedicated components.
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 design allows for the production of pumps with reduced axial dimensions while maintaining reliability and sealing, enabling efficient dispensing and suction of liquids with improved angular stability and aesthetic appeal.
Implementation Method 1
elastic prestressing means constrained in abutment between the piston and the nozzle
Implementation Method 2
cup which is deformed to match the shapes of the association zone in order to block axially and radially the pump relative to the bottle
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2
AI summary
The pump has a jetter (9) connected to a push button (10) for being actuated in a pump body (3). The jetter includes a distribution path with a radial upstream orifice (12) and a channel (13) with a downstream end contacting a distributing nozzle (14). A piston (16) is mounted in rubbing contact against an inner surface of the body to delimit a dosage chamber (17). The piston occupies closing and contacting states of the orifice, and is mounted coaxially around the jetter on an association zone, where the zone is arranged to permit a seal joint between the piston and the jetter.