Explosive actuated extendable driving tool

A manually actuated extendable driving tool for driving a fastening element into a work surface by an explosive charge, said tool comprising:

• (a) a housing;
• (b) a retainer mounted to a back end of said housing;
• (c) a barrel connected to a front end of said housing, said barrel formed with a bore having an explosion chamber at an inner end thereof, said explosion chamber configured to receive an explosive charge, said bore sized to receive a fastening element;
• (d) manually actuatable positioner shaft means slidably received in said retainer, said positioner shaft means being biased towards a back end of the driving tool;
• (e) extendable means connected to a back end of said positioner shaft means for driving said positioner shaft means in a longitudinal direction towards a front end of the driving tool;
• and
• (f) self-aligning muzzle means mounted to said front end of said housing and constrained for limited movement relative to said barrel to compensate to any unevenness in the work surface into which the fastening element is to be driven, a front end of said self-aligning muzzle means configured to press against the work surface, said self-aligning muzzle means being biased forwardly toward a front end of the driving tool, a tip of the fastening element projecting outwardly from said bore when the fastening element is received in said bore, said muzzle means including a spall guard and a splash guard, said spall guard mounted to said housing and constrained for limited movement relative to said barrel, said splash guard disposed about said spall guard and constrained for limited movement relative thereto;
• (g) the fastening element is propelled from the driving tool when the tip of the fastening means is pressed against the working surface and said extendable means is driven towards the front end of the driving tool, said positioner shaft means moves forward and the fastening element is driven backwards into contact with the explosive charge with sufficient force to ignite the explosive charge.

A manually actuated driving tool for driving a fastening element by an explosive charge, said tool comprising:

• (a) a housing;
• (b) a retainer mounted to a rearward portion of said housing;
• (c) a manually actuated reciprocatable positioner shaft slidably mounted in said retainer, said positioner shaft being biased towards said rear portion of the driving tool;
• (d) a barrel connected to a front portion of said housing, said barrel formed with a bore that is configured to receive a fastening element;
• (e) a load chamber formed in said barrel, said load chamber configured to receive a percussion explodable charge;
• (f) a self-aligning spall guard mounted to said housing at a forward portion thereof, said spall guard constrained for limited movement relative to said barrel;
• (g) a splash guard disposed about said spall guard, said splash guard constrained for limited movement relative to said spall guard, an exit chamber formed between said spall guard and said splash guard;
• (h) a noise suppression element disposed in said exit chamber;
• (i) at least one discharge port formed in said barrel and said spall guard said discharge port communicating with said bore and said exit chamber, said discharge port defining an exit for the release of combustion gases and carbon from said load chamber into said noise suppression element after ignition of the charge;
• (j) a handle connected to a back end of said positioner shaft and constrained for limited movement towards a front end of said housing, the fastening element being driven from said barrel when said handle is driven towards a front end of the driving tool, the positioner shaft moves forwardly and the fastening element is driven backwards into contact with the charge with sufficient force to ignite the charge.

A manually actuated extendable driving tool for driving a fastening element into a work surface by ana explosive charge, said tool comprising:

• (a) a housing;
• (b) a retainer mounted to a back end of said housing;
• (c) a barrel connected to a front end of said housing, said barrel formed with a bore and an explosion chamber at an inner end of said bore, said explosion chamber configured to receive an explosive charge, said bore sized to receive a fastening element;
• (d) muzzle means mounted to said front end of said housing, a tip of the fastening element projecting outwardly from said bore when said fastening element is received in said bore, said muzzle means including a self-aligning spall guard mounted to said housing, said spall guard constrained for limited movement relative to said barrel, and a splash guard disposed about said spall guard, said splash guard constrained for limited movement relative to said spall guard, an exit chamber formed between said spall guard and said splash guard;
• and
• (e) trigger means slidably received in said retainer, said trigger means constrained for limited longitudinal movement relative to said barrel, said trigger means biased towards said back end of said housing;
• (f) the fastening element is driven from the driving tool when (1) the tip of the fastening means is pressed against the work surface and (2) said trigger means is driven towards the front end of the driving tool so as to cause the fastening element to be driven backwards into the explosive charge with sufficient force to ignite the explosive charge.

A manually actuated extendable driving tool for driving a fastening element into a work surface by an explosive charge, said tool comprising:

• (a) a housing:
• (b) a retainer mounted to a back end of said housing;
• (c) a barrel connected to a front end of said housing, said barrel formed with a bore having an explosion chamber at an inner end thereof, said explosion chamber configured to receive an explosive charge, said bore sized to receive a fastening element;
• (d) manually actuatable positioner shaft means slidably received in said retainer, said positioner shaft means being biased towards a back end of the driving tool;
• (e) extendable means connected to a back end of said positioner shaft means for driving said positioner shaft means in a longitudinal direction towards a front end of the driving tool;
• and
• (f) muzzle means mounted to said front end of said housing, a tip of the fastening element projecting outwardly from said bore when the fastening element is received in said barrel, said muzzle means including a self-aligning spall guard mounted to said housing, said spall guard constrained for limited movement relative to said barrel, and a splash guard disposed about said spall guard, said splash guard constrained for limited movement relative to said spall guard, an exit chamber formed between said spall guard and said splash guard;
• (g) the fastening element is propelled from the driving tool when (1) the tip of the fastening means is pressed against the working surface, and (2) said extendable means is driven towards the front end of the tool, and (3) said positioner shaft means is driven forward so as to cause the fastening element to be driven backwards into the explosive charge with sufficient force to ignite the explosive charge.

A manually actuated driving tool for driving a fastening element into a work surface by an explosive charge, said tool comprising:

• (a) a housing;
• (b) retainer means mounted to a back end of said housing;
• (c) a barrel connected to a front end of said housing, said barrel formed with a bore, an explosion chamber at an inner end of said bore, said explosion chamber configured to receive an explosive charge, said bore sized to receive a fastening element, a tip of the fastening element projecting outwardly from said bore when the fastening element is received in said bore,
• (d) muzzle means mounted to said barrel and constrained for limited movement relative thereto, a portion of said muzzle means sized to permit play between said muzzle means and said barrel, said muzzle means including a spall guard and a splash guard, said spall guard mounted to said housing and constrained for limited movement relative to said barrel, said splash guard disposed about said spall guard and constrained for limited movement relative thereto;
• (e) means limiting forward movement of said muzzle means relative to said barrel;
• (f) bias means urging said muzzle means towards a front end of the driving tool and away from said retainer means;
• and
• (g) trigger means slidably received in said retainer, said trigger means constrained for limited longitudinal movement relative to said barrel, said trigger means biased towards said back end of said housing;
• (h) the fastening element is driven from the driving tool when (1) the tip of the fastening means is pressed against the work surface and (2) said trigger means is driven towards the front end of the driving tool so as to cause the fastening element to be driven backwards into the explosive charge with sufficient force to ignite the explosive charge.