Universal Chisel Attachment With Cam-Driven Reciprocating Motion

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Solution Overview

Problem

Existing chisel bits for cordless drills and impact tools are limited in their ability to effectively utilize the full torque generated by the tools and are often uncomfortable to use, and there is a need for a universal chisel attachment that can be used with various electric tools.

Innovation Solution

A universal chisel attachment that converts the mechanical rotation of a drill or impact tool into a reciprocating motion using a hammering cam mechanism, allowing for the use of interchangeable chisel members with various electric tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If chisel bits are designed for impact tools only, then they can effectively utilize the full torque and impact force, but they cannot be used with cordless drills

Engineering Contradiction:
Improvecompatibility with electric toolsVSAvoideffective torque utilization
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The attachment adapter is designed with a universal interface that can be mounted on both impact tools and cordless drills, enabling the chisel bit to function with multiple types of electric tools while maintaining effective torque utilization through the cam mechanism

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If bit adapters are used to enable chisel bits with cordless drills, then compatibility is improved, but the full torque from the cordless drill is not effectively utilized

Engineering Contradiction:
Improvecompatibility with cordless drillsVSAvoidtorque utilization efficiency
Core Design Contradiction:
Adaptability or versatilityVSPower

Solution Approach 1:

The attachment uses a dynamic cam mechanism that converts the rotational torque from the cordless drill into reciprocating linear motion, dynamically adapting the torque output to produce effective chiseling action rather than simply transmitting rotation

Inventive Principle:
Principle #15Dynamics

3Adaptability or versatility

If existing chisel options for cordless drills are used, then compatibility is achieved, but they are uncomfortable to use

Engineering Contradiction:
Improveusability with cordless drillsVSAvoidcomfort during chiseling
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The attachment is segmented into distinct functional components including the adapter body, cam mechanism, and chisel bit holder, allowing for optimized ergonomics and comfortable operation while maintaining versatility across different electric tools

Inventive Principle:
Principle #1Segmentation

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 attachment efficiently utilizes the torque generated by electric tools to drive a chisel member with a reciprocal linear motion, enhancing the versatility and comfort of chiseling tasks across different electric tools.

Implementation Method 1

The present invention utilizes a hammering cam mechanism that includes a cylindrical drum connected to a striking cam. The cylindrical drum is rotated due to the torque generated by the electric tool, which in turn rotates the striking cam. The striking cam is designed to strike the chisel member every time the striking is rotated by the cylindrical drum.

Methodology Applied
Scientific EffectCam mechanism: Cam

Data Source

PatentUS12576496B2Universal chisel attachment
Publication Date: 2026.03.17 CARTERHAWKS LLC
  • US12576496B2 patent drawing
  • US12576496B2 patent drawing
  • US12576496B2 patent drawing

AI summary

A universal chisel attachment is an apparatus designed to convert the torque generated by an electric tool into a reciprocal linear motion to drive a chisel member. The apparatus includes a socket adapter, a chisel assembly, a hammering cam mechanism, and a tubular housing. The socket adapter enables the rotational connection of the hammering cam mechanism to a mounting mechanism of the electric tool. The socket adapter also enables the apparatus to be secured to the electric tool. The hammering cam mechanism converts the torque generated by the electric tool to a reciprocal linear motion of the chisel assembly. The chisel assembly enables the carving or cutting of the target object with the apparatus. The tubular housing enables the unobstructed operation of the hammering cam mechanism during operation. The tubular housing also safely retains all the moving components of the hammering cam mechanism to protect the user during operation.