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US 12,643,210 B2Granted
Fastener driving tool
AssigneeIllinois Tool Works Inc.
InventorPascale Grandjean
Life of this patent
Estimating the term…
Abstract
The present disclosure provides for a fastener driving tool, comprising: a combustion chamber having a first inlet port for inputting a first fluid having at least one variable fluid characteristic, and a second inlet port for inputting a second fluid; a piston configured to drive a fastener into a work surface; an ignition device configured to generate an electric arc within the combustion chamber to ignite within the combustion chamber a mixture of said first fluid and said second fluid, and a mechanism configured to measure an ionization current within the combustion chamber.
Claims10
A fastener driving tool comprising:
- a combustion chamber having:
- a first inlet port configured to receive a first fluid having at least one variable fluid characteristic,
- a second inlet port configured to receive a second fluid, and
- an outlet port;
- a first actuator configured to switch between a first open state to allow the first fluid to move into the combustion chamber and a first closed state to prevent the first fluid from moving into the combustion chamber;
- a second actuator configured to switch between a second open state to allow the second fluid to move into the combustion chamber and a second closed state to prevent the second fluid from moving into the combustion chamber;
- a third actuator switchable between a third open state in which the combustion chamber is vented to the atmosphere and a third closed state in which the combustion chamber is prevented from venting;
- a first power driver configured to switch the first actuator between the first open state and the first closed state;
- a second power driver configured to switch the second actuator between the second open state and the second closed state;
- a third power driver configured to switch the third actuator between the third open state and the third closed state;
- a piston configured to drive a fastener into a work surface;
- an ignition device configured to generate an electric arc within the combustion chamber to ignite within the combustion chamber a mixture of the first fluid and the second fluid;
- an ionization sensor located within the combustion chamber, separate from the ignition device, and configured to measure an ionization current within the combustion chamber;
- and
- a signal generator configured to generate a signal representative of information measured by the ionization sensor, wherein the information measured by the ionization sensor comprises an improper use of the fastener driving tool.
12 more elements
A fastener driving tool comprising:
- a combustion chamber configured to receive a first fluid and configured to receive a second fluid, wherein the first fluid is ambient air and the second fluid includes a combustible fuel, and including a first inlet port, a second inlet port, and an outlet port;
- a first actuator configured to switch between a first open state to allow the first fluid to move into the combustion chamber and a first closed state to prevent the first fluid from moving into the combustion chamber;
- a second actuator configured to switch between a second open state to allow the second fluid to move into the combustion chamber and a second closed state to prevent the second fluid from moving into the combustion chamber;
- a third actuator switchable between a third open state in which the combustion chamber is vented to the atmosphere and a third closed state in which said combustion chamber is prevented from venting;
- a first power driver configured to switch the first actuator between the first open state and the first closed state;
- a second power driver configured to switch the second actuator between the second open state and the second closed state;
- a third power driver configured to switch the third actuator between the third open state and the third closed state;
- a controller configured to provide independent digital output signals to the first power driver, the second power driver, and the third power driver to control a first time interval of the first open state, a second time interval of the second open state, and a third time interval of the third open state, respectively;
- a piston configured to drive a fastener into a work surface;
- an ignition device configured to generate an electric arc within the combustion chamber to ignite within the combustion chamber a mixture of the first fluid and the second fluid;
- an ionization sensor located within the combustion chamber, separate from the ignition device, and configured to measure an ionization current within the combustion chamber;
- and
- a signal generator configured to generate a signal representative of information measured by the ionization sensor, wherein the information measured by the ionization sensor comprises an improper use of the fastener driving tool.
10 more elements
Dependencies are inferred from the claim text.