Impact Power Tool Rotary Valve Stroke Speed Control
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Solution Overview
Problem
Current impact power tools are inadequate for delicate hand working operations, such as fine engraving and carving, as they lack the ability to deliver low impact energy at rapid rates and require multiple systems for varying power outputs, leading to inefficient use of space and poor impact control.
Innovation Solution
An improved impact power tool with a precision controlled drive system, featuring a rotary pulse valve with elongated slots, an air storage tank capable of storing fifty times more pressurized air, and a housing design with a plastic dielectric base plate and beveled rails for easy assembly and maintenance, allowing for faster stroke speeds and immediate impact control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple impact power tool systems are used to cover a wide range of power outputs, then the versatility and adaptability for different crafting applications is improved, but the device complexity and inventory space consumption increase
Solution Approach 1:
The patent implements a dynamically adjustable drive system with a rotary valve that can vary the air pulse duration and frequency to deliver a continuous range of impact energies from 0.5 to 5 foot-pounds, allowing a single tool to adapt to multiple crafting applications without requiring multiple separate tools
Solution Approach 2:
The impact power tool is designed with a universal drive system that can perform multiple functions across different material types and crafting applications, from delicate engraving to robust carving, by adjusting the air pulse parameters through the rotary valve mechanism
2Loss of time
If traditional rotary valves with circular ports are used, then the device complexity is kept simple, but the response time and impact control precision are insufficient
Solution Approach 1:
The patent replaces the traditional circular port design with elongated rectangular ports in the rotary valve, creating an asymmetric configuration that allows faster air pulse response and more precise impact control by extending the port length in the direction of air flow to reduce flow resistance and improve valve response characteristics
3Duration of action of moving object
If air is stored in a compact tank, then the device portability is improved, but the air supply duration and consistency for high-speed operation are reduced
Solution Approach 1:
The air storage tank is nested within the housing structure of the impact power tool, integrating the air supply system into the tool's body to maximize storage capacity within the available space while maintaining portability, allowing sufficient air reserves for extended high-speed operation without adding excessive external bulk or weight
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 solution enables the impact power tool to deliver a wider range of power outputs with improved stroke speeds and response times, addressing the limitations of prior art tools by providing a consistent air supply and enhanced control over impact energy.
Implementation Method 1
an air storage tank housed within a housing of the impact power tool and operable to store approximately fifty times greater pressurized, regulated air than prior art impact power tools
Implementation Method 2
a drive assembly comprising a rotary pulse valve. A central rotor of the valve has an elongated slot that communicates with an elongated slot of a bushing of the valve
Data Source
AI summary
An improved impact power tool for carving and engraving an article comprises an air delivery system operable to communicate with a pressurized air source; a drive assembly operable to receive air from the pressurized air source via the air delivery system; a hand held device in driven communication with the drive assembly; and a housing for storage of the air delivery system and drive assembly. The tool includes an improved valve design, a throttle bias valve, and an air storage tank housed within the housing, and an improved housing construction. The improved valve design and air storage tank enable greater stroke speeds of a work tool over a wider power range while also improving the crispness and speed of the impact reaction time over the entire range. The throttle bias valve is in communication with an additional exhaust path, such that the bias valve allows improved control of the hand held device and improved operation over a wider range of air pressures.