Sanitary Line Attachment With Inelastic Sealing Ring
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Solution Overview
Problem
Sealing rings made of elastic material are not suitable for certain applications, as they can be easily misinstalled or overlooked during storage and transport, particularly when dimensionally stable and inelastic seals are required, leading to potential incorrect or non-installation risks.
Innovation Solution
A sanitary line connection with a sealing ring made of dimensionally stable and inelastic material, featuring at least two indentations as tool application surfaces on its inner circumference, which allows for secure screwing into an internal thread using a screwing tool, ensuring correct installation and self-retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing ring made of dimensionally stable and inelastic material is used, then sealing reliability is improved, but ease of installation deteriorates because the sealing ring cannot be easily compressed and installed by hand
Solution Approach 1:
The sealing ring is pre-installed by the manufacturer onto the line section during production. The indentations on the sealing ring enable automated or manual pre-installation tools to securely grip and seat the ring in place during manufacturing, eliminating the need for end-users to perform the installation manually. This self-service approach ensures proper installation while maintaining the dimensional stability required for reliable sealing.
Solution Approach 2:
The indentations on the sealing ring serve as an intermediary interface between the sealing ring and installation tools. These indentations provide secure gripping points that allow tools to apply controlled force during pre-installation, bridging the gap between the rigid sealing ring and the installation process without requiring the sealing ring itself to be flexible or compressible.
2Ease of operation
If elastic material sealing rings are used, then ease of installation is improved, but suitability for certain applications deteriorates due to low elasticity and high dimensional stability requirements
Solution Approach 1:
The invention changes the material parameter from elastic to dimensionally stable/inelastic material. This parameter change makes the sealing ring suitable for applications requiring high dimensional stability and low elasticity, such as certain sanitary and industrial connections where material rigidity is critical. The indentations compensate for the loss of ease of installation by providing tool engagement points.
Solution Approach 2:
The sealing ring has different local qualities: the bulk material provides dimensional stability and inelasticity for application suitability, while the localized indentations provide tool engagement features for installation. This local differentiation allows the sealing ring to meet both the material performance requirements and the installation requirements of specific applications.
Data Source
Figure 1~4
Figure 5
Figure 6a~8b
AI summary
The invention relates to a sanitary line attachment (1) which has a sleeve-shaped design in at least one front end area (6) and, in the sleeve interior of this sleeve-shaped front end area (6), has an inner thread (7) for attachment to an adjacent line section, wherein at least one sealing ring (9) is clamped sealingly between the line attachment and the adjacent line section, from the outer circumference of which ring at least one holding projection (10) protrudes, which holding projection (10) engages in the inner thread (7) in the sleeve interior of the sleeve-shaped front end area (6). A characteristic of the line attachment (1) according to the invention is that the sealing ring (9) is made from a dimensionally stable and/or inelastic material, and that the sealing ring (9) has at least one indent (11), preferably at least two indents (11) arranged at a distance from each other on the inner circumference of the ring, which indents (11) are designed as tool engagement surfaces (cf. Fig. 5).