Patent ID: 8578679

Claim:
A smokestack erection method comprising: constructing a foundation of reinforced concrete, constructing a base ring section, securing the base ring section to the foundation, constructing a construction machine on the foundation, providing plural vertical double acting hydraulic cylinders in the construction machine, providing a vertically movable platform connected to the hydraulic cylinders, providing lifting bolts extending inward from the platform for connecting to upper sections of the smokestack, providing a support in the machine on the base ring section to support upper rings, constructing a first top section, inserting, positioning and holding the first top section on the base ring section in the construction machine, connecting the first top section to the platform, raising the first top section with the platform and the hydraulic cylinders, holding the first top section upward with the movable platform and the hydraulic cylinders, constructing a second next upper ring section, inserting, positioning and holding the second next upper ring section on the base ring section in the construction machine, juxtaposing the second next upper ring section and the first top section with the platform and the hydraulic cylinders by lowering the platform, connecting the first top section and the second next upper ring section, disconnecting the first to section from the platform, lowering the platform and connecting the platform to the second next upper ring section, lifting the first and second ring sections with the platform and the hydraulic cylinders, holding the first and second ring sections upward, constructing a third upper ring section, inserting, positioning and holding the third upper ring section on base ring section in the construction machine below the second upper ring section, juxtaposing the third upper ring section and the second upper ring section by lowering the platform, connecting the third and second upper ring sections, disconnecting the second upper ring section from the platform, lowering the platform and connecting the platform to the third next upper ring section, lifting the third, second and first upper ring sections with the hydraulic cylinders, holding the third, second and first ring sections elevated, continuing the constructing, inserting, juxtaposing, connecting, disconnecting, lowering, connecting, lifting, and holding subsequent sequential ring sections and an n th ring section and, removing the support, lowering the n th and above ring sections and connecting the nth ring section to the base ring section, removing the construction machine and the hydraulic cylinders and readying the smokestack for use.