Method for repairing structural cracks
First Claim
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1. A method for repairing a crack in a structural workpiece comprising:
- forming a first hole into a surface of a structural workpiece to be repaired on a first side of a crack;
forming a second hole into said surface of said structural workpiece to be repaired on a second side of said crack opposite said first side;
forming a slot into said surface of said structural workpiece of a length sufficient to connect said first hole and said second hole;
after forming said slot, assembling a cammed drawbolt assembly by;
threading a first dowel threaded to a first threaded end of a drawbolt; and
connecting a cammed dowel having a through-hole and cammed slot to a shaped head disposed at an other end of said drawbolt and spaced from said first dowel by a length corresponding to the length of said slot;
installing a cammed drawbolt assembly entirely within said holes and slot in said structural workpiece;
drawing said crack closed by actuating said cammed drawbolt assembly into a closed position; and
securing said drawbolt in said closed position.
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Abstract
A crack repair method includes forming a pair of holes into a surface of a structural workpiece on opposite sides of the crack, forming a slot into the surface of the structural workpiece to connect the holes on opposite sides of a crack, installing the cammed drawbolt assembly into the holes and slot, drawing said crack closed by actuating the cammed drawbolt assembly into a closed position and securing the drawbolt into the closed position.
28 Citations
9 Claims
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1. A method for repairing a crack in a structural workpiece comprising:
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forming a first hole into a surface of a structural workpiece to be repaired on a first side of a crack; forming a second hole into said surface of said structural workpiece to be repaired on a second side of said crack opposite said first side; forming a slot into said surface of said structural workpiece of a length sufficient to connect said first hole and said second hole; after forming said slot, assembling a cammed drawbolt assembly by;
threading a first dowel threaded to a first threaded end of a drawbolt; and
connecting a cammed dowel having a through-hole and cammed slot to a shaped head disposed at an other end of said drawbolt and spaced from said first dowel by a length corresponding to the length of said slot;installing a cammed drawbolt assembly entirely within said holes and slot in said structural workpiece; drawing said crack closed by actuating said cammed drawbolt assembly into a closed position; and securing said drawbolt in said closed position. - View Dependent Claims (2, 3, 4)
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5. A method for repairing a crack in a structural workpiece comprising:
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forming a plurality of first holes into a surface of a structural workpiece to be repaired on a first side of a crack; forming a plurality of second holes into said surface of said structural workpiece to be repaired on a second side of said crack, each second hole corresponding to and opposite to a respective one of said plurality of first holes; forming a plurality of slots into said surface of said structural workpiece, each said slot respectively located to connect a first hole and a corresponding opposite second hole to form a plurality of pairs of holes joined by respective slots; after forming said slots, assembling a cammed drawbolt assembly by;
threading a first dowel threaded to a first threaded end of a drawbolt; and
connecting a cammed dowel having a through-hole and cammed slot to a shaped head disposed at an other end of said drawbolt and spaced from said first dowel by a length corresponding to the length of said slot;installing a cammed drawbolt assembly entirely within each respective one of said plurality pairs of holes joined by a slot in said structural workpiece; drawing said crack closed by actuating each said cammed drawbolt assembly into a closed position; and securing each said drawbolt in said closed position. - View Dependent Claims (6, 7)
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8. A method for repairing a crack through a structural workpiece comprising:
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forming a plurality of first holes into a first surface of a structural workpiece to be repaired on a first side of a crack; forming a plurality of second holes into said surface of said structural workpiece to be repaired on a second side of said crack, each said second hole corresponding to and opposite to a respective one of said plurality of first holes; forming a plurality of slots into said first surface of said structural workpiece, each slot respectively located to connect a first hole and a corresponding second hole to form a plurality of pairs of holes joined by respective slots in said first surface; forming a plurality of first holes into a second surface of a structural workpiece to be repaired on a second side opposite to said first surface on a first side of said crack;
forming a plurality of second holes into said second surface of said structural workpiece to be repaired, each said second hole corresponding to and opposite to a respective one of said plurality of first holes into said second surface;forming a plurality of slots into said second surface of said structural workpiece, each slot respectively located to connect a first hole and a corresponding second hole to form a plurality of pairs of holes joined by respective slots in said second surface; after forming said slots, assembling a cammed drawbolt assembly by;
threading a first dowel threaded to a first threaded end of a drawbolt; and
connecting a cammed dowel having a through-hole and cammed slot to a shaped head disposed at an other end of said drawbolt and spaced from said first dowel by a length corresponding to the length of said slot;installing a cammed drawbolt assembly entirely within each said pair of holes and slot in each surface of said structural workpiece; drawing said crack closed by actuating each said cammed drawbolt assembly into a closed position; and securing each said drawbolt in said closed position. - View Dependent Claims (9)
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Specification