Barb Clamp Smooth Bore Design Eliminates Pressure Differential
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Solution Overview
Problem
Existing barb clamps for flexible tubes often create pressure differentials and allow fluid entrapment due to transitions in inner diameters between the tube and barb fittings, which can lead to bacterial growth and leaks, especially in medical and pharmaceutical applications where a secure, leak-proof connection is critical.
Innovation Solution
The improved barb clamp design features a barb fitting with a tapered termination that maintains the same inner diameter as the tube, eliminating transitions and pressure differentials, and includes a collet and sleeve configuration with resilient tangs and annular projections for a secure, lockable connection without fluid entrapment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional barb fitting with abrupt transition is used to connect flexible tubing, then the connection is secure and easy to manufacture, but pressure differentials occur and fluid can be trapped between the tube and fitting
Solution Approach 1:
The barb fitting incorporates a tapered bore that curves gradually from the outer diameter to the inner diameter, eliminating abrupt transitions. This curved geometry allows fluid to flow smoothly through the connection without becoming trapped, while still maintaining a secure mechanical connection between the tubing and fitting.
Solution Approach 2:
The invention changes the geometric parameters of the barb fitting bore from a conventional abrupt transition to a gradual taper. This parameter modification eliminates the pressure differential and fluid entrapment issues while preserving the connection reliability.
2Object-generated harmful factors
If a tapered barb fitting is used to eliminate transitions and pressure differentials, then fluid flow is improved, but the connection complexity increases
Solution Approach 1:
The tapered bore is achieved by modifying the geometric parameters of the barb fitting during manufacturing. This parameter change creates a smooth transition that eliminates pressure differentials without requiring complex assembly procedures or additional components.
Solution Approach 2:
The tapered bore design merges the external barb structure with the internal fluid passage into a single integrated component. This combination eliminates the need for separate sealing elements or complex multi-part assemblies, thereby reducing overall device complexity while achieving the desired fluid flow characteristics.
3Strength
If a secure mechanical connection is made with traditional barb clamps, then the connection is robust, but fluid can become trapped at the connection interface
Solution Approach 1:
The tapered bore creates a curved fluid passage that guides fluid smoothly from the tubing interior through the barb fitting. This curved geometry prevents fluid from becoming trapped at the connection interface, while the external barb structure maintains strong mechanical attachment to the tubing.
Solution Approach 2:
The invention applies different geometric qualities to different regions of the barb fitting: the external surface maintains barbs for strong mechanical attachment, while the internal bore features a smooth taper for optimal fluid flow. This local differentiation of geometric properties simultaneously achieves both connection strength and fluid flow efficiency.
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
This design ensures a secure, leak-proof connection with constant fluid pressure and velocity, preventing bacterial growth and ensuring reliable fluid transfer in medical and pharmaceutical applications by eliminating transitions and pressure differentials between the tube and barb fitting.
Implementation Method 1
The collet has an interior radially compressible surface for radially compressing the flexible tube
Implementation Method 2
the barb fitting tapers to a termination point, so that there is no transition between the inner diameter of the tube and the inner diameter of the barb fitting for preventing a pressure differential in the tube
Data Source
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AI summary
A barb clamp is provided for fluid liquid or gaseous connection to a flexible tube, the flexible tube having an inner bore defined by a predetermined inner diameter for providing a fluid flow path. The barb clamp includes a barb connector having the same predetermined inner diameter as the flexible tube and a tapered end insertable into the tube. A sleeve and collet lock over the tubing and barb connector to prevent liquid material entering between the barb and tube. The tapered end of the barb connector terminates at a point so that there is no transition between the inner diameter of the tube and the inner diameter of the barb connector to provide no pressure differential in the tube between the outside and inside of the barb clamp.