Paint Sprayer Piston Blocking Mechanism Prevents Leakage
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Solution Overview
Problem
Paint sprayers suffer from leakage issues when the piston is not in place during assembly, leading to electrical shorts and contamination of dry parts by wet part fluids, as the wet and dry parts can be incorrectly connected without proper sealing.
Innovation Solution
Incorporating a mechanism that prevents the wet part from being connected to the dry part without the piston in place, using flexible cantilevered clips, pivotal blocking brackets, or pivotal stoppers to ensure the piston is correctly positioned before assembly, and a locking mechanism that only allows connection when the piston is present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wet part and dry part are connected without the piston in place, then assembly is simple and quick, but leakage occurs causing electrical shorts and contamination
Solution Approach 1:
The piston is designed to automatically move into its sealing position when the wet part is approached by the dry part during assembly. This preliminary positioning action ensures that the sealing surface is prepared and engaged before the final connection is made, preventing leakage while maintaining simple assembly operations.
Solution Approach 2:
The piston acts as an intermediary sealing element between the wet part and dry part. It mediates the connection by providing a sealing surface that must be engaged for the parts to connect properly, thus preventing fluid leakage and electrical shorts while allowing straightforward assembly.
2Reliability
If a piston is always required in position for assembly, then leakage is prevented, but assembly complexity increases
Solution Approach 1:
The piston is designed to be self-positioning through its interaction with the dry part during assembly. The mechanical design allows the piston to automatically move into its correct sealing position without requiring external intervention or complex positioning mechanisms, thus maintaining assembly simplicity while ensuring reliable sealing.
Solution Approach 2:
The piston is designed with dynamic positioning capability, allowing it to move freely during assembly and then settle into its correct sealing position. This dynamic design enables the piston to adapt to minor variations in assembly alignment while ensuring proper sealing, reducing the need for complex fixed-positioning mechanisms.
Data Source
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AI summary
A sprayer (100) comprising: a sprayer rear dry part (120); a sprayer front wet part (124) positionable in an operative connected position relative to the rear dry part (120) and in an alternative disconnected position relative to rear dry part (120); a piston (132) positionable in an operative position extending between the rear dry part (120) and the front wet part (124) when the front wet part (124) is in the connected position and alternatively positionable in a disconnected position disconnected from both of the rear and front parts (120, 124) when the front wet part (124) is in the disconnected position; and a blocking mechanism (360, 420, 480, 570) connected to the rear dry and/or front wet parts (120, 124) and configured to prevent the front wet part (124) from being positioned in the connected position when the piston (132) is in the disconnected position.