The present invention is directed to a combustion powered setting device for driving fastening elements such as nails, bolts and pins into a receiving material, with a fuel source, and a fuel line ( 12.1, 12.2) from the fuel source (11) to a combustion chamber (13) and with at least one metering dev
The present invention is directed to a combustion powered setting device for driving fastening elements such as nails, bolts and pins into a receiving material, with a fuel source, and a fuel line ( 12.1, 12.2) from the fuel source (11) to a combustion chamber (13) and with at least one metering device (20) for fuel which is arranged in the fuel line (12.1, 12.2) between the fuel source and the combustion chamber. In order to improve setting devices of this type, the metering device (20) has an adjusting device ( 30) for the metered volume, which adjusting device (30) responds to the fuel pressure.
대표청구항▼
The invention claimed is: 1. Combustion powered setting device for driving fastening elements, such as nails, bolts and pins into receiving material, comprising a fuel source (11), a fuel line (12.1, 12.2) extending from said fuel source (11) to a combustion chamber (13), at least one metering dev
The invention claimed is: 1. Combustion powered setting device for driving fastening elements, such as nails, bolts and pins into receiving material, comprising a fuel source (11), a fuel line (12.1, 12.2) extending from said fuel source (11) to a combustion chamber (13), at least one metering device (20) located in the fuel line (12.1, 12.2) between said fuel source (11) and the combustion chamber (13), an automatic adjusting device (30) in said metering device (20) for providing a metered volume of fuel, and said adjusting device ( 30) automatically responding to the fuel pressure, wherein said metering device (20) has a metering chamber (21) connected to said feed line (21), a displacing body (22) having a stroke and arranged to be moved into said metering chamber (21) and the stroke of said displacing body (22) is automatically adjustable by said adjusting device (30), and wherein said adjusting device (30) has a pressure receiving chamber (31), a pressure sensitive member (32) extendible into said pressure receiving chamber (31), an actuating member (33) displaceable by said pressure-sensitive member (32), and a pretensioned spring element (34) in contact with said pressure sensitive member (33) biasing said pressure sensitive member ( 32) into said pressure receiving chamber (31). 2. Setting device, as set forth in claim 1, wherein said pressure sensitive member (32) is formed as a piston. 3. Setting device, as set forth in claim 1, wherein said actuating member (33) projects into a stroke path of said displacing body (22) and defines an end point of the stroke path of said displacing body (22) in a displacing body direction ( 40). 4. Setting device, as set forth in claim 3, wherein said displacing body (22) can be displaced in the displacing body direction (40) by an actuating member (15) when the setting device is pressed against a receiving material. 5. Setting device, as set forth in claim 4, wherein said actuating member (15) is a pressing rod assembly extending from a housing (50) of the setting device and extending into contact with a receiving material into which a fastening element is to be driven. 6. Setting device, as set forth in claim 4, wherein an elastic element (24) is positioned between said displacing body (22) and said actuating member (15). 7. Setting device, as set forth in claim 6, wherein said elastic element (24) is a spring element. 8. Setting device, as set forth in claim 1, said metering chamber (21) has an inlet (25) and an outlet (26) wherein said inlet (25) communicates at least occasionally with said pressure receiving chamber (31). 9. Setting device, as set forth in claim 8, wherein a first valve device (27) is positioned at said inlet (25) allowing a flow of fuel into said metering chamber (21) and blocking a flow of fuel back out of said inlet, and a second valve device (28) is positioned at said outlet (26) allowing flow out of said metering chamber (21) to said combustion chamber (13) and blocking flow of fuel back into said metering chamber (21).
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