Damping Arrangement for Combustion Setting Tool Metering Device
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Solution Overview
Problem
Conventional combustion-operated setting tools with electronically controlled valves experience disturbances and reduced service life due to rebound pulses during operation.
Innovation Solution
A damping arrangement is integrated into the setting tool, comprising a support element and a damping member, such as an elastomeric body or foam, to absorb impacts and accelerations, preventing direct action on the metering device and ensuring disturbance-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional electronically controlled valves are used in combustion-operated setting tools, then the device can be operated with standard commercial components, but rebound pulses during operation adversely affect the function and service life of the valve
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping arrangement (damping element and/or damping chamber) that absorbs and attenuates rebound pulses before they reach the metering device. This protective measure is built into the tool housing structure, ensuring that conventional electronically controlled valves are shielded from harmful vibrations and impacts during operation, thereby extending their service life and maintaining reliable function.
2Device complexity
If rebound pulses are allowed to act on the metering device, then the structure remains simple, but disturbances occur in operation of the valve
Solution Approach 1:
The damping arrangement is integrated into the existing tool housing structure using straightforward design elements such as damping elements mounted on housing walls or damping chambers formed within the housing. This approach provides reliable protection against rebound pulses while maintaining relatively simple construction, avoiding complex isolation systems or additional protective mechanisms.
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 damping arrangement effectively minimizes the impact of rebound pulses on the metering device, enabling the use of conventional electronically controlled valves and enhancing their service life and operational stability.
Implementation Method 1
The damping member can be formed, e.g., as an elastomeric body having good damping characteristics
Implementation Method 2
the damping member consists of several layers of the damping foil
Implementation Method 3
a section of the propellant conduit between the connection member and the metering device is formed flexible at least regionwise
Data Source
AI summary
A combustion-operated setting tool for driving in fastening elements includes a propellant container receptacle (16) for receiving a propellant container (20), a connection element (14) provided in the propellant container receptacle (16) for connection with the propellant container (20), a propellant conduit (15) for connecting the connection element (14) with the tool combustion chamber (12), a metering device (13) for controlling flow of propellant from the connection element (14) to the combustion chamber, and a damping arrangement (30) for damping the metering device (13).