Air-Vented Impression Cartridge Gasket for Defect-Free Injection
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Solution Overview
Problem
Conventional impression material cartridges fail to effectively discharge air trapped between the cylinder and the gasket, leading to defects in the tooth impression model during dental impression taking.
Innovation Solution
The impression material cartridge gasket features an air vent hole integrated into the sealing member accommodation groove, utilizing a time difference in the movement of the gasket main body and the sealing member to discharge air remaining in the cartridge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cartridge gasket is used in an impression material cartridge system, then the sealability and prevention of material leakage are improved, but the risk of bacterial contamination and degradation of impression material increases due to air pockets trapped between the gasket and cartridge body
Solution Approach 1:
The patent extracts the air pockets from the space between the gasket and cartridge body by introducing air vent holes. This removes the harmful factor (trapped air) that causes bacterial contamination while preserving the sealability function of the gasket structure.
Solution Approach 2:
The air vent holes act as intermediary channels that allow air to escape from the sealed space between the gasket and cartridge body. This mediator mechanism prevents air pocket formation without compromising the overall seal integrity of the cartridge system.
2Reliability
If the cartridge gasket is made tightly sealed to prevent material leakage, then the sealability is improved, but air pockets are trapped which lead to bacterial growth and material degradation
Solution Approach 1:
The air vent holes extract trapped air from the sealed environment, removing the condition that leads to bacterial growth and material degradation. This maintains the stable composition of the impression material while preserving effective sealing.
Solution Approach 2:
The patent converts the potentially harmful trapped air into a beneficial controlled venting mechanism. The air vent holes allow air to be systematically removed during assembly, transforming the air pocket problem into a controlled process that prevents contamination while maintaining sealability.
3Object-affected harmful factors
If air vent holes are added to the cartridge gasket to prevent bacterial contamination, then the hygiene is improved, but the manufacturing complexity increases
Solution Approach 1:
The air vent holes are segmented as simple discrete openings in the gasket structure rather than complex venting mechanisms. This segmentation approach maintains manufacturing simplicity while effectively addressing bacterial contamination by providing basic air escape pathways.
Solution Approach 2:
The air vent holes are strategically positioned at specific locations in the gasket where air pockets are most likely to form. This localized approach to venting provides effective contamination prevention without requiring complex venting systems throughout the entire gasket structure.
Data Source
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AI summary
The present invention relates to an impression material cartridge gasket comprising: a gasket body (110) that moves up and down along the inner wall surface of a cylinder according to the charging and discharging of a liquid chemical; and a sealing member (120) that is coupled to the outer circumferential surface of the gasket body (110) and prevents leakage of the liquid chemical. The gasket body (110) includes: a contact jaw (115) that is formed, protruding radially outward, along the height direction of a side wall (113) and contacts the inner wall surface of the cylinder; an air retention groove (114) which is recessed radially inward from the lower portion of the contact jaw (115) and in which air is retained; and an accommodation groove (117) which is recessed radially inward between the upper surface of the gasket body (110) and the contact jaw (115) and to which the sealing member (120) is coupled. At least one air vent hole (119), which is recessed a certain depth toward the accommodation groove (117) and discharges the air retained in the air retention groove (114) to the outside, is provided on a plate surface of the contact jaw (115) in a circumferential direction.