Self powered magazine hammer

A hand powered hammer for driving nails into a workpiece comprising:

• a handle;
• an elongated body attached to said handle, said body having a cylindrical recess therein having a longitudinal axis and including a generally cylindrical striking head at one end thereof and linearly movable along the axis of said recess, a passageway through said striking head along said axis, first cylinder in said body positioned along said axis, a piston and drive blade member in said first cylinder in alignment with said passageway;
• second cylinder and a piston in said second cylinder having an operative connection to said striking head, a manifold communicating with said piston and drive blade member and said piston, and hydraulic fluid filling said manifold;
• and
• a nail magazine fastened to said body, a nail receiving chamber in said first cylinder and means urging nails from said magazine into said chamber;
• such that striking said striking head against said workpiece displaces said piston causing hydraulic pressure to be applied against said piston and drive blade member to drive a nail from said chamber into said workpiece;
• a plurality of said second cylinders each with a respective piston and rod, said piston rods and cylinders being arranged in parallel relationship to each other and the longitudinal axis of said moving head for direct action responsive to movement of said moving head and wherein said piston and drive blade member extends parallel to said plurality of cylinders for movement in a nail driving direction.

A hand powered hammer for driving nails into a workpiece comprising:

• a handle;
• an elongated body attached to said handle, said body having a cylindrical recess therein having a longitudinal axis and including a generally cylindrical striking head having a rounded striking surface for contacting said workpiece at one end of said recess, said striking head being linearly movable along the axis of said recess, a passageway through said striking head along said axis, first cylinder in said body positioned along said axis and a first piston and a drive blade in said first cylinder in alignment with said passageway;
• a second cylinder and an enlarged diameter chamber in said second cylinder at the opposite end of said body from said striking head and a second piston in said enlarged diameter chamber having a diameter substantially greater than the diameter of said cylinder recess a means connecting said second piston to said striking head, said connecting means extending parallel to said longitudinal axis and surrounding said first cylinder a manifold communicating with said first piston and said second piston, and hydraulic fluid filling said manifold;
• and
• a nail magazine fastened to said body, a nail receiving chamber in said first cylinder and means urging nails from said magazine into said chamber;
• such that striking said striking head against said workpiece displaces said second piston causing hydraulic pressure to be applied against said first piston and drive blade to drive a nail from said chamber into said workpiece.