Environmentally protected reinforcement dowel pins and method of making
First Claim
1. A reinforcement dowel pin, comprising:
- a bar having a longitudinal axis and having at least one exposed surface along the longitudinal axis; and
a metal covering at least one of the at least one exposed surfaces of the bar, the metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, wherein the metal is caused to be in intimate contact with the at least one of the at least one exposed surfaces of the bar using a method consisting of the group of roll forming, lock seaming, welding, die casting, dipping, sinking, drawing, flame spraying, or plasma spraying.
2 Assignments
0 Petitions
Accused Products
Abstract
Galvanically protected reinforcement dowel pins and methods of producing the same. In one embodiment, the reinforcement dowel pins comprise a bar or tube, the longitudinal exposed surfaces of which are covered by a heavy gauge of a sacrificial metal, such as zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy. The bar or tube comprises steel, carbon steel, or other ferrous metal. The heavy gauge of sacrificial metal is applied to the ferrous metal by various processes, such as roll bonding, lock seaming, welding, die casting, flame spraying, plasma spraying, dipping, sinking, and drawing. The resulting reinforcement dowel pins resist corrosion without sacrificing structural integrity, and are reasonable in materials and manufacturing costs. These dowel pins may be installed in adjacent concrete panels using conventional methods, and therefore do not introduce additional costs in installation.
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Citations
54 Claims
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1. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and having at least one exposed surface along the longitudinal axis; and
a metal covering at least one of the at least one exposed surfaces of the bar, the metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, wherein the metal is caused to be in intimate contact with the at least one of the at least one exposed surfaces of the bar using a method consisting of the group of roll forming, lock seaming, welding, die casting, dipping, sinking, drawing, flame spraying, or plasma spraying. - View Dependent Claims (2, 3, 4)
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5. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and having at least one exposed surface along the longitudinal axis; and
a layer of metal covering the at least one of the exposed surfaces of the bar, the metal layer in intimate contact with the at least one of the at least one exposed surfaces of the bar, and the metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and cross-section, and having an exposed surface along its longitudinal axis; and
a layer of metal in intimate contact with the exposed surface of the bar, the dowel pin formed by the process of providing the bar, providing a metal tube of cross-section similar in shape and greater in dimension(s) than the cross-section of the bar, the metal tube consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, placing the bar inside the metal tube, and drawing the metal tube downward onto the exposed surface, such that the metal tube is contact with the exposed surface of the bar.
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13. A reinforcement dowel pin, comprising:
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a hollow base tube having an exterior exposed surface on the outside of the hollow base and an interior exposed surface on the inside of the hollow base, an exterior cross-section, and an interior cross-section; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the hollow base tube, providing a first metal tube of cross-section similar in shape and greater in dimension(s) than the exterior cross-section of the base tube, the first metal tube consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, placing the base tube inside the first metal tube, and drawing the metal tube downward onto the exterior exposed surface of the base tube, such that the first metal tube is in intimate contact with the exterior exposed surface of the base tube. - View Dependent Claims (14)
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15. A reinforcement dowel pin having a longitudinal axis, comprising:
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a base tube having an exterior surface; and
a first layer of metal in intimate contact with the exterior surface, the dowel pin formed by the process of providing a strip of base material having first and second planar surfaces, providing a first strip of metal, the first strip of metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum or aluminum alloy, cladding the first strip of metal to the first planar surface of the base strip, and forming the clad base strip into a desired shape along the longitudinal axis of the dowel pin. - View Dependent Claims (16)
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17. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the bar, providing a mold cavity having internal dimension(s) larger than the dimension(s) of the at least one exposed surfaces of the bar, providing a molten metal, the molten metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, placing the bar into the mold cavity, placing the molten metal into the mold cavity, and allowing the molten metal to solidify to form the layer of metal. - View Dependent Claims (18, 19)
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20. A reinforcement dowel pin, comprising;
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a hollow tube having a longitudinal axis and an exterior exposed surface and an interior exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with the interior and exterior exposed surfaces, the dowel pin formed by the process of providing the hollow tube, providing a mold cavity having internal dimension(s) larger than the dimension(s) of the exterior surface of the hollow tube, providing a molten metal, the molten metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, placing the hollow tube into the mold cavity, placing the molten metal into the mold cavity, and allowing the molten metal to solidify to form the layer of metal. - View Dependent Claims (21)
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22. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the bar, providing the metal, the metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, and flame spraying the metal onto the at least one of the at least one exposed surfaces.
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23. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the bar, providing the metal, the metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, and plasma spraying the metal onto the at least one of the at least one exposed surfaces. - View Dependent Claims (25)
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24. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the bar, providing a galvanic material comprising the metal, and dipping the at least one of the at least one exposed surfaces of the bar with the paint.
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26. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the bar, providing at least one strip of metal, the at least one strip consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, placing the at least one strip in contact with at least one of the at least one exposed surfaces, and working the bar and at least one strip through a series of rollers to cause the at least one strips to be in intimate contact with the at least one of the at least one exposed surfaces.
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27. A reinforcement dowel pin comprising:
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a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the bar and a tube of metal, the tube consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, and wrapping the tube around the bar, and lock seaming the tube around the bar.
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28. A reinforcement dowel pin, comprising:
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a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis; and
a layer of metal in intimate contact with at least one of the at least one exposed surfaces, the dowel pin formed by the process of providing the bar, providing the tube of metal, the tube consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy, wrapping the tube around the bar, and welding the tube around the bar.
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29. A method for making a reinforcement dowel pin, the method comprising the steps of:
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providing a base bar having a longitudinal axis, a exterior cross-section, and an exterior surface along the longitudinal axis;
providing a first tube of metal, the first tube of metal having a longitudinal axis and having a cross-section similar in shape and greater in dimension(s) than the exterior cross-section of the base bar, the first tube consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy;
placing the base bar inside the first tube; and
drawing the first tube downward onto the exterior surface of the base bar, such that the first tube is in intimate contact with the exterior surface of the base bar. - View Dependent Claims (30, 31, 32, 33)
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34. A method for making a reinforcement dowel pin, the method comprising the steps of:
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providing a strip of base material having first and second planar surfaces;
providing a first strip of metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or a aluminum alloy;
cladding the first strip of metal to the first planar surface of the strip of base material; and
forming the clad strip of base material into a desired shape. - View Dependent Claims (35, 36, 37)
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38. A method for making a reinforcement dowel pin, the method comprising the steps of:
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providing a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis;
providing a mold cavity having internal dimension(s) larger than the outer dimension(s) of the at least one exposed surfaces of the bar;
providing a molten metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy;
placing the base bar into the mold cavity;
placing the molten metal into the mold cavity; and
allowing the molten metal to solidify to form the layer of metal. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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45. A method for making a reinforcement dowel pin, the method comprising the steps of:
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providing a hollow tube having a longitudinal axis and an exterior exposed surface and an interior exposed surface along the longitudinal axis;
providing a mold cavity having internal dimension(s) larger than the outer dimension(s) of the exterior surface of the hollow tube;
providing first and second removable inserts sized smaller than the outer dimension(s) of the interior exposed surface of the hollow tube to permit the first and second removable inserts to be inserted into the first and second ends of the hollow tube, each of the first and second removable inserts having a draft angle to permit the first and second inserts to be withdrawn outward from the center of the hollow tube;
providing a molten metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy;
placing the first and second removable inserts into the first and second ends of the hollow tube;
placing the hollow tube into the mold cavity;
placing the molten sacrificial metal into the mold cavity; and
allowing the molten metal to solidify to form the layer of metal. - View Dependent Claims (46, 47)
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48. A method for making a reinforcement dowel pin, the method comprising the steps of:
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providing a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis;
providing a metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy; and
flame spraying the metal onto at least one of the at least one exposed surfaces of the bar such that the metal is in intimate contact with the at least one of the at least one exposed surfaces.
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49. A method for making a reinforcement dowel pin, the method comprising the steps of:
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providing a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis;
providing a metal consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy; and
plasma spraying the metal onto at least one of the at least one exposed surfaces of the bar such that the metal is in intimate contact with the at least one of the at least one exposed surfaces.
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50. A method of making a reinforcement dowel pin, the method comprising the steps of:
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providing a base having a longitudinal axis and at least one exposed surface along the longitudinal axis;
providing a galvanic material comprising a metal; and
dipping at least one of the at least one exposed surfaces of the bar into the galvanic material such that the metal is in intimate contract with the at least one of the at lease one exposed surfaces. - View Dependent Claims (51)
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52. A method of making a reinforcement dowel pin, the method comprising the steps of:
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providing a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis;
providing a tube of metal, the tube consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy;
wrapping the tube around the bar; and
welding the tube around the bar such that the tube is in intimate contact with the at least one exposed surface of the bar.
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53. A method of making a reinforcement dowel pin, the method comprising the steps of:
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providing a tube of metal, the tube consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or a aluminum alloy; and
wrapping the tube around the bar such that the tube is in intimate contact with the at least one exposed surface of the bar.
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54. A method of making a reinforcement dowel pin, the method comprising the steps of:
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providing a bar having a longitudinal axis and at least one exposed surface along the longitudinal axis;
providing at least one strip of metal, the at least one strip consisting of one of the group of zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy;
placing the at least one strip in contact with at least one of the at least one exposed surfaces of the bar; and
working the bar and at least one strip through a series of rollers to cause the at least one strip to be in intimate contact with the at least one of the at least one exposed surfaces.
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Specification