Three-Flat-Side Shank Adaptor for Power Tool Chuck

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Solution Overview

Problem

Existing tap holding adaptors for power tool chucks are not suitable for holding threading devices, are complex, and costly to manufacture, and difficult to use.

Innovation Solution

A simple and inexpensive adaptor with a shank having three flat sides that cooperates with the chuck's jaws to securely hold a threading device, featuring a four-sided tap member for internal threads and a die member for external threads, with a cylindrical housing and set screw for secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If complex locking mechanisms with multiple components are used in tap holding adaptors, then the holding reliability is improved, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improveholding reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the essential function of holding the threading device by using only the minimum necessary components: a shank with three flat sides that directly cooperates with the chuck jaws. Complex locking mechanisms, springs, and multiple moving parts are eliminated, retaining only the critical elements needed for secure holding.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The adaptor is segmented into simple functional components: the shank with three flat sides for chuck engagement and the threading device interface. This segmentation allows each component to perform its specific function efficiently without the complexity of integrated locking mechanisms.

Inventive Principle:

Principle #1Segmentation

2Reliability

If traditional tap holding adaptors with multiple components are used, then the holding security is improved, but the manufacturing cost increases

Engineering Contradiction:

Improveholding securityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the functions of multiple traditional adaptor components into a single integrated shank structure. The three flat sides are formed as part of the shank itself, eliminating the need for separate locking components, springs, and adjustment mechanisms, thereby reducing manufacturing cost while maintaining holding security.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The adaptor uses simple, inexpensive materials and construction methods that allow for cost-effective manufacturing. The design accepts that the adaptor may have limited reuse cycles but compensates by making each unit extremely cost-effective to produce.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If complex locking mechanisms are used in adaptors, then the holding reliability is improved, but the ease of operation decreases

Engineering Contradiction:

Improveholding reliabilityVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The three flat sides on the shank automatically engage with the chuck jaws through the natural gripping action of the drill operator. The design eliminates the need for separate locking actions, adjustments, or complex operating procedures - the holding function serves itself through the basic act of inserting the adaptor into the chuck.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8844941B1Adaptor for holding a threading device

Publication Date: 2014.09.30 DICKREDE RONALD W

AI summary

An adaptor for holding a threading device to a chuck of a power tool, with the chuck having three jaws. The adaptor comprises a shank having three flat sides, wherein each flat side of the chuck cooperates with a corresponding jaw of the chuck.