Explosive powder charge operated setting tool

Details Explosive powder charge operated setting tool Explosive powder charge operated setting tool

B - Operations, Transporting

27

F

B27F 7/02 (2006.01) B25C 1/14 (2006.01)

Patent

CA 2121283

An explosive powder charge operated setting tool uses compressed propellant gases for returning a piston from an end position to a starting position. The piston is axially displaceable by the propellant gases within an axially extending guide bore in a piston guide. The propellant gases flow from the guide bore through a first opening into an axially extending channel outside the piston guide and then through a second opening in the region of the end position of the piston back to the guide bore. After the piston is driven into the end position, compressed propellant gases within the guide bore return the piston to the starting position where it impacts against the base of a cartridge carrier located at the starting position. When the piston is stopped, the cartridge carrier is displaced to a limited extent opposite to the setting direction of the tool. To afford the limited displacement, the cartridge carrier is connected to the housing part laterally enclosing the piston guide by sawtooth-shaped threads providing clearances.

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