Fastener driving tool using a gas spring

A portable fastener driving tool, comprising:

• a housing;
• a storage chamber,
• a hollow cylinder that includes a movable piston, wherein:
• (a) a first end of the hollow cylinder is always in fluidic communication with said storage chamber;
• (b) said pressurized gas is not exhausted to atmosphere after a drive stroke;
• and
• (c) the storage chamber is proximal to a first end of said hollow cylinder at least a portion of the pressurized gas in the storage chamber is colinear with and located above the first end of the hollow cylinder;
• a movable driver that is in communication with said piston at least during the drive stroke;
• a guide body with a linear passageway for said driver,
• a handle portion, the handle portion having a rear end configured to receive an electrical connection of a removable battery pack positioned below the handle, wherein the battery pack provides energy for said motor when connected;
• a motor that provides motive power to lift the driver;
• a removable magazine configured to hold a plurality of fasteners, the magazine having a first end proximal to an exit end of said guide body and a second end that extends past said battery pack.

A portable fastener driving tool, comprising:

• a housing;
• a hollow cylinder that includes a movable piston;
• a storage chamber proximal to and in fluidic communication with a first end of said hollow cylinder, wherein the storage chamber contains a pressurized gas that is always above atmospheric pressure, and wherein at least a portion of the pressurized gas in the storage chamber is colinear with and located above the first end of the hollow cylinder;
• a movable driver that is in communication with said piston at least during a drive stroke;
• a prime mover;
• a guide body that is located proximal to said hollow cylinder, and having a linear passageway for said driver, and having an exit end that is located distal from said hollow cylinder;
• a safety contact element proximal to said exit end, said safety contact element being disposed at a front portion of the tool, above said guide body;
• and
• an electrical connection at the housing to receive a source of electrical energy that is removably attached to said housing;
• wherein said piston travels through said hollow cylinder between a higher pressure position and a lower pressure position;
• said piston has a rest position between operational cycles;
• and a location of said rest position is proximal to said higher pressure position;
• and
• said pressurized gas is not vented to atmosphere after said drive stroke.

A portable fastener driving tool, comprising:

• a housing;
• a hollow cylinder that includes a movable piston;
• a storage chamber proximal to and in fluidic communication with a first end of said hollow cylinder, wherein the storage chamber contains a pressurized gas that is always above atmospheric pressure;
• a movable driver that is in communication with said piston at least during a drive stroke;
• a prime mover;
• and
• an electrical connection at the housing to receive a source of electrical energy that is removably attachable to said housing;
• wherein:
• said piston travels through said hollow cylinder between a higher pressure position and a lower pressure position;
• said piston has a rest position between operational cycles;
• and a location of said rest position is proximal to said higher pressure position;
• and
• said pressurized gas is not vented to atmosphere after said drive stroke.