Bidirectional Wedge Clamp for Cable Slippage Prevention

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Solution Overview

Problem

Existing cable anchoring methods face challenges in securing cables without threads, requiring specialized tools or hydraulic systems, and often fail to prevent bidirectional slippage effectively.

Innovation Solution

A self-tightening wedge clamp with wedge-like plates and a surrounding sleeve that uses bolts for assembly, allowing for bidirectional clamping and slippage prevention through a wedge action, enabling easy installation with conventional tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional cable anchoring methods are used (multi-strand anchorage, thread-bearing sleeves, bird cage formation), then cables can be secured, but installation requires specialized tools or complex procedures

Engineering Contradiction:
Improveease of installationVSAvoidinstallation complexity
Core Design Contradiction:
Ease of manufactureVSDevice complexity

Solution Approach 1:

The clamp is divided into two separate halves that can be independently positioned and secured around the cable. Each half contains wedge elements that can be independently adjusted, allowing for simplified installation without requiring specialized tools or complex procedures.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The wedge elements are designed to automatically tighten and secure the cable when the clamp halves are assembled together. The self-tightening mechanism eliminates the need for specialized installation tools or complex adjustment procedures, as the clamp secures itself through the wedge action of its components.

Inventive Principle:
Principle #25Self-service

2Reliability

If button anchors with compression rings or set screws are used, then cable slippage is prevented, but specialized tools are required for installation

Engineering Contradiction:
Improveslippage preventionVSAvoidease of installation
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The wedge elements automatically engage and tighten against the cable when the clamp halves are assembled, providing self-tightening action that prevents slippage without requiring specialized tools or manual adjustment of compression rings and set screws.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The traditional mechanical system of compression rings and set screws is replaced with a wedge-based mechanical system. The wedge elements convert the assembly force directly into clamping force on the cable, providing reliable slippage prevention through pure wedge action rather than threaded fastening.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If bidirectional wedge systems with multiple connection points are used, then slippage is prevented in both directions, but device complexity increases

Engineering Contradiction:
Improvebidirectional slippage preventionVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The clamp is segmented into two halves, each containing wedge elements that provide bidirectional slippage prevention. By distributing the wedge elements across separate halves rather than requiring a single complex interlocking structure, the design achieves bidirectional security with reduced overall complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The wedge elements are configured with asymmetric geometry that provides different engagement characteristics for upward and downward cable movement. This asymmetric wedge design enables bidirectional slippage prevention through a relatively simple structural arrangement rather than requiring symmetric multi-point connection mechanisms.

Inventive Principle:
Principle #4Asymmetry

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 wedge clamp effectively secures cables in either direction along their longitudinal axis, preventing slippage and allowing for easy installation using standard tools, addressing the limitations of prior art.

Implementation Method 1

a line is to be clamped between the plates of said two members through a wedge action

Methodology Applied
Scientific EffectWedge action: Wedge

Implementation Method 2

the sleeve and the wedge plates are adapted to be in an inseparable (or linked) condition at any time by means of bolts mounted on the sleeve

Methodology Applied
Scientific EffectMechanical fastening: Mechanical Fastener

Data Source

PatentUS11215263B2Bidirectional wedge clamp
Publication Date: 2022.01.04 ASSA ABLOY ENTRANCE SYST AB
  • US11215263B2 patent drawing
  • US11215263B2 patent drawing
  • US11215263B2 patent drawing

AI summary

A bidirectional, wedge clamp is disclosed. Conventional clamps, such as those used with electrical cables mainly secure a line in a single direction. The invention herein being comprised of a bidirectional clamp for conventional cables, wires and rope etc. (herein referred to as a ‘line’) having a simple and easily-operable construction, wherein two plate-like members and an outer sleeve-like member are telescopically assembled to clamp a line there between. Plates and sleeve members having a plurality of interconnected, opposing number of wedges that when acted upon in a lateral motion by a line there between, causing said wedges to slide against one another—thereby tightening down the plates onto said line and preventing slippage. An object of the invention is to clamp a line and prevent slipping laterally in either direction along the line's longitudinal axis.