Cartridge for a power driven tool
AssigneeBurndy Corporation
InventorsJohn A. Franzini, Gennaro L. Pecora
Life of this patent
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Abstract
A cartridge for a powder actuated tool having a cartridge case, a powder propellant, a bushing, and a piston. The piston has a tapered outer diameter that is larger in a rear end of the piston and is compressed inward by the cartridge case. A port extends through the piston and has an entrance to the port at a rear end of the piston with a semi-spherical shape to slow gas flow rate passing through the port and reduce the amount of propellant residue passing through the port. The piston has a main section and a cantilevered section. The cantilevered section has a general ring shape and forms a portion of the outer diameter of the piston.
Claims9
In a cartridge for a powder actuated tool, the cartridge having a cartridge case, a propellant, a bushing, and a piston, the improvement comprising:
- the piston having a tapered outer diameter that is larger in a rear end of the piston and is compressed inward by the cartridge case, wherein the piston has a port therethrough and a semi-spherical entrance to the port at the rear end of the piston.
In a cartridge for a powder actuated tool, the cartridge having a cartridge case, a propellant, a bushing and a piston having a port therethrough, the improvement comprising:
- the piston having an entrance to the port at a rear end of the piston with a semi-spherical shape to gas flow rate passing through the port and reduce the amount of propellant residue passing through the port.
Dependencies are inferred from the claim text.