Fastener driving device with mechanisms to limit movement of nails

A fastener driving device for providing a fastener into a workpiece, comprising:

• a housing assembly;
• a nose assembly connected to the housing assembly, the nose assembly having a drive channel;
• a magazine for carrying one of a supply of first fasteners and a supply of second fasteners through a feed channel along a feed direction to the nose assembly, the first and second fasteners having different lengths;
• at least one nail stop provided along an upper portion of the nose assembly to engage the first fasteners;
• and
• a movable nail stop having a distal end provided along a lower portion of the nose assembly and extending into the feed channel to engage and prevent the second fasteners from receding into the nose assembly,
• wherein the distal end of the movable nail stop is positioned for contact by the first fastener.

A fastener driving device for providing first fasteners having a first length and second fasteners having a second length shorter than the first length into a workpiece, comprising:

• a housing assembly;
• a nose assembly connected to the housing assembly;
• a first nail stop provided in the nose assembly for engaging head portions of the first fasteners;
• and
• at least one movable nail stop provided in the nose assembly for engaging head portions of the second fasteners,
• wherein the at least one movable nail stop is adapted to movably extend into a position to prevent the second fasteners from receding into the nose assembly.

A system for preventing misalignment of fasteners within a fastener driving device, the fasteners having different first and second lengths, the system comprising:

• a drive channel to expel the fasteners into a workpiece;
• a feed channel providing the fasteners to the drive channel along a feed channel direction;
• a plurality of stop pawls positioned for engagement by each of the fasteners within the feed channel;
• and
• a plurality nail stops including a first nail stop positioned for engagement by head portions of the fasteners having the first length, a second nail stop for engagement by head portions of the fasteners having the first length, and a movable nail stop positioned for engagement by head portions of the fasteners having the second length and engagement by shank portions of the fasteners having the first length,
• wherein the movable nail stop is movably provided within the feed channel between the first nail stop and at least one of the plurality of stop pawls.

A fastener driving device configured to drive fasteners having different lengths, the fastener driving device comprising:

• a nose assembly having a drive channel;
• a magazine for carrying supplies of fasteners having different lengths through a feed channel along a feed channel direction toward the nose assembly;
• a first stop pawl having a distal end adapted to extend from one side of the feed channel into the feed channel between a first fastener and an adjacent second fastener;
• and
• a second stop pawl having a distal end adapted to extend from the one side of the feed channel into the feed channel between the first fastener and the adjacent second fastener, the first stop pawl being positioned closer to the drive channel than the second stop pawl,
• wherein the first stop pawl and the second stop pawl are configured to engage and prevent movement of fasteners having different lengths along a direction opposite to the feed channel direction.