Cam Clamp Assembly With Predetermined Compression Feedback
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Solution Overview
Problem
Conventional sanitary clamps in liquid food and pharmaceutical systems experience inconsistent compression due to varying friction, leading to misalignment and leakage, and are time-consuming to install and repair.
Innovation Solution
A cam clamp assembly with an off-center rotatable cam providing a progressive wedging interaction, featuring a handle that pivots about an axis to secure the clamp with a predetermined compression, offering tactile and auditory indications of proper alignment and compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional clamp with wing nut and bolt is used, then the clamp can be assembled with simple components, but the compression applied to ferrules and gasket becomes inconsistent due to varying friction
Solution Approach 1:
The patent replaces the threaded mechanical system (bolt and wing nut) with a cam mechanism. The cam's rotational movement transforms into linear compression through its wedge-shaped profile, eliminating threaded interfaces and their associated friction variations. This mechanical substitution provides consistent, predetermined compression while maintaining manufacturing simplicity.
Solution Approach 2:
The patent changes the mechanical parameter from threaded rotation to cam rotation with wedge-shaped contact surfaces. The cam profile is designed with specific angles and dimensions that predetermined the compression force, transforming the compression application from a friction-dependent process to a geometry-dependent process, thereby ensuring consistency.
2Reliability
If a wing nut is tightened to correct leakage, then the compression can be increased, but the nut, bolt, gasket and clamp become damaged due to over-tightening
Solution Approach 1:
The cam mechanism is pre-designed with a predetermined compression profile that achieves the optimal sealing force before reaching a maximum safe limit. The cam's geometry inherently prevents over-tightening by providing a natural stop point, eliminating the need for operators to judge the appropriate tightening force and preventing damage to components.
Solution Approach 2:
The cam mechanism provides tactile feedback through its rotational resistance and audible feedback through clicking sounds at predetermined intervals during rotation. This feedback system guides the operator to apply the correct amount of compression and prevents excessive tightening that could damage components, while ensuring reliable sealing.
3Ease of repair
If a conventional clamp with bolt and wing nut is used, then the clamp can be disassembled and reassembled, but the process becomes time-consuming
Solution Approach 1:
The cam mechanism transforms the static threaded connection into a dynamic rotational mechanism. The cam can be quickly rotated into the locked position during assembly and rapidly rotated back during disassembly, eliminating the time-consuming threading and unthreading operations. The dynamic cam rotation provides both ease of repair and reduced installation time.
Solution Approach 2:
The cam mechanism is designed as a separate, modular component that can be independently assembled and disassembled from the clamp body. This segmentation allows for quick replacement and maintenance of the cam component without affecting other parts of the clamp, thereby reducing overall repair time while maintaining reassemblability.
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
The cam clamp assembly ensures consistent compression, reduces installation and repair time, and prevents over-tightening, thereby minimizing damage and leakage in sanitary fittings.
Implementation Method 1
a cam clamp assembly having a cam that is rotatable about an off-center axis by a handle in a progressive wedging interaction to releasably secure the clamp
Implementation Method 2
a progressive wedging interaction
Implementation Method 3
cam that is rotatable about an off-center axis by a handle
Data Source
AI summary
A cam assembly includes a first arcuate segment having a first extension, a second arcuate segment having a second extension. The first and second arcuate segments are coupled together for movement with respect to one another. An elongated member includes a first end and a second end, the first end being pivotally coupled to the second extension. The first extension member includes a raised surface portion that extends away from the first arcuate segment and extends away from the second extension. A cam member pivotally secured to the elongated member proximate the second end, the cam member contacting both the portion of the first arcuate segment and a portion of the raised surface portion of the first extension as the cam is rotated from a closed to open position.