Internal combustion fastener driving tool accelerator plate
First Claim
Patent Images
1. A fastener driving tool operable through an internal combustion driven piston, the tool comprising:
- a. a driver body comprising a piston housing, a piston slidably housed in the piston housing, a driving member coupled to the piston;
a combustion chamber defined by the body, piston housing, and piston;
the piston and driving member being arranged and configured to drive a fastener upon combustion of a metered amount of gaseous fuel in the combustion chamber;
b. the piston housing comprising an accelerator plate;
the accelerator plate being arranged and configured to divide the combustion chamber into a primary region and a secondary region and to direct ignited combustion gasses from the primary region into the secondary region of the combustion chamber;
c. the accelerator plate comprising a generally rectangular slot.
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Accused Products
Abstract
The present invention relates to an accelerator plate that divides the combustion chamber of an internal combustion fastener driving tool.
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Citations
30 Claims
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1. A fastener driving tool operable through an internal combustion driven piston, the tool comprising:
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a. a driver body comprising a piston housing, a piston slidably housed in the piston housing, a driving member coupled to the piston;
a combustion chamber defined by the body, piston housing, and piston;
the piston and driving member being arranged and configured to drive a fastener upon combustion of a metered amount of gaseous fuel in the combustion chamber;b. the piston housing comprising an accelerator plate;
the accelerator plate being arranged and configured to divide the combustion chamber into a primary region and a secondary region and to direct ignited combustion gasses from the primary region into the secondary region of the combustion chamber;c. the accelerator plate comprising a generally rectangular slot. - View Dependent Claims (2)
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3. A fastener driving tool operable through an internal combustion driven piston, the tool comprising:
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a. a driver body comprising a piston housing, a piston slidably housed in the piston housing, a driving member coupled to the piston;
a combustion chamber defined by the body, piston housing, and piston;
the piston and driving member being arranged and configured to drive a fastener upon combustion of a metered amount of gaseous fuel in the combustion chamber;b. the piston housing comprising an accelerator plate;
the accelerator plate being arranged and configured to divide the combustion chamber into a primary region and a secondary region and to direct ignited combustion gasses from the primary region into the secondary region of the combustion chamber;c. the accelerator plate comprising a slot;
the slot being arranged and configured to receive a fuel metering tube. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 30)
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15. A fastener driving tool operable through an internal combustion driven piston, the tool comprising:
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a. a driver body comprising a piston housing, a piston slidably housed in the piston housing, a driving member coupled to the piston;
a combustion chamber defined by the body, piston housing, and piston;
the piston and driving member being axially arranged and configured within the piston housing to drive a fastener upon combustion of a metered amount of gaseous fuel in the combustion chamber;b. the piston housing comprising an accelerator plate;
the accelerator plate being arranged and configured to divide the combustion chamber into a primary region and a secondary region and to direct ignited combustion gasses from the primary region into the secondary region of the combustion chamber;
the accelerator plate comprising a radially oriented fuel metering tube;c. wherein the fuel metering tube is arranged and configured to dispense the metered amount of fuel into each of the primary region and the secondary region of the combustion chamber. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A fastener driving tool operable through an internal combustion driven piston, the tool comprising:
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a. a driver body comprising a piston housing, a piston slidably housed in the piston housing, a driving member coupled to the piston;
a combustion chamber defined by the body, piston housing, and piston;
the piston and driving member being axially arranged and configured within the piston housing to drive a fastener upon combustion of a metered amount of gaseous fuel in the combustion chamber;b. the piston housing comprising an accelerator plate;
the accelerator plate being arranged and configured to divide the combustion chamber into a primary region and a secondary region and to direct ignited combustion gasses from the primary region into the secondary region of the combustion chamber;
the accelerator plate comprising an electrode, the electrode comprising an axially oriented pin that is substantially centrally located on the accelerator plate;c. wherein the electrode is a component of a fuel ignition circuit. - View Dependent Claims (28)
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27. The fastener driving tool of claim 27, wherein the tool further comprises a spark plug and the electrode is oriented toward the spark plug and forms a spark gap.
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29. A fastener driving tool operable through an internal combustion driven piston, the tool comprising:
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a. a driver body comprising a piston housing, a piston slidably housed in the piston housing, a driving member coupled to the piston;
a combustion chamber defined by the body, piston housing, and piston;
the piston and driving member being arranged and configured to drive a fastener upon combustion of a metered amount of gaseous fuel within the combustion chamber;
the piston housing comprising an aluminum alloy;
the piston comprising a self-lubricating compression ring;b. the piston housing comprising an accelerator plate;
the accelerator plate comprising a slot;
the accelerator plate being arranged and configured to divide the combustion chamber into a primary region and a secondary region and to provide fluid communication between the primary and secondary regions;c. a pump system;
the pump system comprising an intake system, an exhaust system, a pump sleeve, a pump housing, the piston housing and a decompression port defined by the piston housing;
the pump sleeve sealably contacting the piston housing and defining a space around the piston housing;
the pump housing being arranged and configured to move axially in the space and to sealably contact the pump sleeve;
a compression spring in the space axially biasing the pump housing;
the intake system comprising a reed valve and being arranged and configured for fluid communication with the combustion chamber and surroundings of the tool;
the exhaust system being arranged and configured for fluid communication with the space and surroundings of the tool;
the decompression port being arranged and configured to relieve pressure in the combustion chamber as the pump housing is compressed into the space;d. a fuel metering system comprising a port defined by the tool for receiving gaseous fuel, a regulator, and a shuttle valve in fluid communication with the port; e. the shuttle valve comprising a metering chamber housing, a metering chamber defined by the metering chamber housing and a gating valve;
the metering chamber and gating valve being arranged and configured to provide asynchronous fluid communication between the metering chamber and the combustion chamber or between the metering chamber and the port;
the combustion check valve arranged and configured for preventing fluid flow from the combustion chamber to the metering chamber; andf. a linear cam system arranged and configured to actuate the gating valve for fluid communication between the port for fuel and the combustion chamber upon compression of the pump housing into the space.
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Specification