Prosthetic Cone Connection With Removable Attachment
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Solution Overview
Problem
Existing cone connections in prostheses can be unreliable, especially when connecting parts with thin-walled cone-shaped bores, as they may tear out under stress, and lack flexibility in compatibility with various prosthesis designs.
Innovation Solution
A prosthesis part with a cone-shaped projection featuring a lateral recess for a securing element, allowing for a removable cone attachment that can engage with a grub screw, which can be inserted through a through-opening in a non-thin-walled area, ensuring secure connection regardless of the prosthesis part's design, and allowing for easy detachment and reattachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a through-opening is provided in thin-walled cone-shaped bores for passage of securing elements, then connection security is improved, but the wall thickness is insufficient and the through-opening may tear out under tensile stress
Solution Approach 1:
The patent moves the through-opening from the thin-walled conical bore to a different spatial location on the prosthesis part, specifically in an area with sufficient wall thickness. This dimensional relocation allows the securing element to pass through a structurally sound region while still securing the cone connection, thereby avoiding the tearing issue while maintaining connection security.
Solution Approach 2:
The patent introduces an intermediary structure (the alternatively positioned through-opening in a non-thin-walled area) that mediates between the need for securing element passage and the structural integrity requirement. This intermediary location serves as a compromise that satisfies both the connection security need and the wall strength constraint.
2Reliability
If cone connections are designed for secure engagement, then connection reliability is improved, but the design flexibility and compatibility with various prosthesis parts is reduced
Solution Approach 1:
The patent creates a universal connection system where the prosthesis part with the cone-shaped projection and laterally positioned through-opening can be compatible with multiple types of prosthesis parts (both thin-walled and thick-walled cone-shaped bores). The alternatively positioned through-opening serves multiple functions: it provides secure engagement for grub screws while maintaining compatibility across different prosthesis designs, thereby achieving both reliability and versatility.
3Ease of operation
If the securing element is guided through a through-opening in the cone-shaped bore area, then engagement with the lateral recess is simplified, but the thin-walled structure may tear out under load
Solution Approach 1:
The patent relocates the through-opening from the conical bore area to a different dimensional location on the prosthesis part where wall thickness is sufficient. This spatial repositioning maintains the simplicity of engagement (the securing element still passes through and engages the lateral recess) while avoiding the structural weakness of the thin-walled conical area.
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3a~3b
AI summary
The invention relates to a prosthesis part (1) having a conical protrusion (10) for connecting to an additional prosthesis part (3) having a complementary conical bore (30), wherein the conical protrusion (10) has a lateral recess (12) for the engagement of a securing element (40), and wherein the prosthesis part (1) with the conical protrusion (10) has a removable cone attachment (20), said cone attachment having a lateral recess (21) for the engagement of a securing element (40). The invention further relates to a prosthesis (4) having a prosthesis part (1) according to the invention and a set (50) of prosthesis parts (1, 3, 3'), wherein a prosthesis part (1) according to the invention is formed.