Offset Drive Tool for Threaded RF Connectors
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Solution Overview
Problem
Existing methods for connecting and disconnecting threaded RF coaxial connectors are limited by the physical interference from adjacent connectors and cables, allowing only about ⅓ of a turn due to restricted range of motion, especially in hard-to-access locations.
Innovation Solution
A connection and disconnection tool with an offset drive mechanism that translates rotational motion from a user-side axis to a connector-side axis, allowing full revolutions of the connector while the cable or tubing passes through, using a modular spanner and spacer segments to prevent mechanical interference and binding, and optionally incorporating an integral actuator for remote operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an open-end wrench is used to rotate a threaded connector in close adjacent relationship to other connectors, then the connector can be connected or disconnected, but the range of motion is physically limited to about 1/3 of a turn due to interference from adjacent RF coaxial cables
Solution Approach 1:
The patent introduces a bar mechanism that extends beyond the plane of the connector heads, allowing rotation to occur in a different spatial dimension. The bar provides leverage perpendicular to the connector axis, enabling full 360-degree rotation even when adjacent connectors block the traditional radial rotation path. This dimensional change in the rotation mechanism resolves the interference problem.
Solution Approach 2:
The patent uses a bar as an intermediary tool that couples the user's rotational input to the connector. Instead of directly rotating the connector with a wrench that would collide with adjacent cables, the bar acts as a mediator that transmits torque through a different path, allowing the connector to rotate freely without direct mechanical interference from surrounding components.
2Area of stationary object
If multiple threaded connectors are engaged next to each other in close spaced relationship, then space is efficiently utilized, but the accessibility for operation becomes difficult and time-consuming
Solution Approach 1:
By extending the operation mechanism beyond the crowded plane of adjacent connectors, the patent enables full rotation without requiring additional lateral space. The bar mechanism operates in the vertical dimension perpendicular to the connector array, allowing efficient operation in tightly packed configurations that would otherwise require excessive time and manual dexterity.
3Ease of operation
If the cable or tubing is allowed to pass through the tool during rotation, then full revolutions can be achieved without mechanical interference, but the tool design becomes more complex
Solution Approach 1:
The patent divides the tool into distinct functional segments: a bar for applying torque, a pass-through channel for the cable/tubing, and connection interfaces. This segmentation allows each component to perform its specific function independently - the bar rotates freely to enable full revolutions while the pass-through channel simply guides the cable, avoiding the need for complex integrated mechanisms.
Solution Approach 2:
The patent extracts the cable/tubing constraint from the rotation mechanism by providing a dedicated pass-through path. Instead of trying to rotate the connector while the cable is constrained by the tool structure, the cable is taken out of the rotating assembly and allowed to pass through freely, separating the rotation function from the cable management function and simplifying the overall design.
Data Source
AI summary
Apparatus and methods that may be employed to install or remove a threaded connector by allowing a cable or tubing segment attached to the threaded connector to pass through an open pass-through area that is defined to extend through the tool so as to allow the threaded connector to be tightened and/or loosened relative to the fitting by turning the connector a full revolution or more while the cable or tubing is attached to the connector and extending through the tool.