Back to results
US 2008/0302846 A1Published application
Explosive discharge actuated tool for driving fasteners
AssigneeTomarco Contractor Specialties, Inc.
InventorWilliam J. Thompson
Life of this patent
Estimating the term…
Abstract
An explosive discharge actuated tool for driving fasteners has a barrel with a closed bore, an interchangeable nose piece to accommodate different length fasteners and a piston that is manually reset to firing position by a spacer-fastener being inserted into the barrel.
Claims25
An explosive discharge actuated tool for driving fasteners, comprising:
- a barrel (16) having a bore (26) with a leading end (29) and a trailing end (27), the bore length being shorter than the barrel length, the only opening in the barrel bore (26) being a firing chamber funnel (80) at the trailing end (27) and a muzzle bore aperture (33) at the leading end (29);
- a muzzle nose piece (28) having a predetermined length with a leading and trailing end, and a muzzle bore (31), extending from the trailing to leading end, that is smaller in diameter than the diameter of the barrel bore (26), the trailing end of the muzzle (28) being measurably attached to the forward end (22) of the barrel (16) to engage with the muzzle bore aperture (33) at the leading end (29) of the barrel bore (26);
- a piston (82) with a leading end and a trailing end (83), sized to fit the barrel bore (26) and having a length that is less than the length of the barrel bore (26);
- a piston rod (84) having a leading and trailing end attached to the leading end of the piston (82) at the trailing end of the piston rod (84), the piston rod having a diameter sized to fit the muzzle bore (31);
- and
- a spacer-fastener (118) having a predetermined length related to the length of the muzzle nose piece (28) with a leading and trailing end and a diameter sized to fit into the muzzle bore (31);
- whereby inserting the spacer-fastener (118) into the muzzle bore (31), after the tool has discharged, so that the spacer-fastener (118) does not extend beyond the leading end of the muzzle nose piece (28), moves the piston rod (84) and piston (82) into firing position with the trailing end of the piston (82) at the trailing end (83) of the barrel bore (26) and the trailing end of the spacer-fastener (118) and leading end of the piston rod (84) being in physical contact.
4 more elements
A spacer-fastener (118) for use in an explosive discharge actuated tool, comprising:
- a fastening nail (101) with a leading and trailing end, a head (105) at the trailing end and a point (86) at the leading end;
- and
- a spacer (100) having a leading and trailing end, the point (86) of the fastening nail (101) being inserted into the trailing end of the spacer, the spacer having a split knob (109) at the leading end.
An explosive discharge actuated tool for driving fasteners, comprising:
- a barrel (16) having a bore (26) with a leading end (29) and a trailing end (27), the bore length being shorter than the barrel length, the only opening in the barrel bore (26) being a firing chamber funnel (80) at the trailing end (27) and a nozzle bore aperture (33) at the leading end (29);
- a muzzle nose piece (28) with a leading end and trailing end having a muzzle bore (31), extending from the trailing to leading end, that is smaller in diameter than the diameter of the barrel bore (26), the trailing end of the muzzle (28) removably attached to the forward end (22) of the barrel (16) to engage with the muzzle bore aperture (33) at the leading end (28) of the barrel bore (26);
- a piston (82) with a leading end and trailing end (83), sized to fit the barrel bore (26) and having a length that is less than the length of the barrel bore (26);
- and
- a piston rod (84) having a leading and trailing end attached to the leading end of the piston (82) at the trailing end of the piston rod (84), the piston rod having a diameter sized to fit the muzzle bore (31).
2 more elements
Dependencies are inferred from the claim text.