초록 ▼

An apparatus for expanding a building structure in which the roof structure of an existing building is raised by a plurality of column assemblies, each including an outer section and at least one inner section. A jack assembly is provided which raises each inner section into an extended position rel

An apparatus for expanding a building structure in which the roof structure of an existing building is raised by a plurality of column assemblies, each including an outer section and at least one inner section. A jack assembly is provided which raises each inner section into an extended position relative to its corresponding outer section. A clamping device is mounted on each jack assembly for gripping the inner section and when the extended position is reached the corresponding sections are secured with the clamping device automatically releasing upon downward movement of the jack assembly.

대표청구항 ▼

Apparatus for extending the height of a building comprising: a plurality of columns which are vertically oriented with respect to ground level; each column comprising an outer section and at least one inner section telescopically disposed within said outer section; at least one jack assembly includi

Apparatus for extending the height of a building comprising: a plurality of columns which are vertically oriented with respect to ground level; each column comprising an outer section and at least one inner section telescopically disposed within said outer section; at least one jack assembly including a pair of jacks mounted to said outer section and adapted to move upward and downward, said jack assembly operatively connected to said inner section for raising said inner section into an extended position relative to said outer section in response to the upward movement of said jack assembly; clamping means including a pair of gripping jaws pivotally mounted on said jack assembly for said upward movement, with said gripping jaws securely gripping said inner section during said upward movement to bring and hold said inner section in said extended position; each of said gripping jaws of each pair of gripping jaws positioned in opposing relationship to each other, such that said gripping jaws grasp said inner section upon said upward movement of said jack assembly; means for maintaining said inner section secured to said outer section and mounted between said gripping jaws, such that said gripping jaws can be brought into releasably secured contact with said inner section; said clamping means being released upon downward movement of said jack assembly; said inner section being fabricated from steel in the form of a wide flange beam having an I-shaped cross sectional configuration integrally formed with a pair of flanges separated by a web, said gripping jaws contacting the exterior surfaces of said flanges; said means mounted between said gripping jaws including a nut-and-bolt assembly journalled and releasably secured between said gripping jaws; each of said jacks mounted on the top of said outer section including a piston adapted for movement in an upward direction and in a downward direction along the vertical axis of said column, a pivotal connection assembly mounted between said piston and the respective gripping jaw, such that upward movement of said piston will create a vertical moment of force through said pivotal connection assembly to achieve pivotal action of said gripping jaws against said inner section; and said gripping jaws including a pair of mounting plates secured to said pivotal connection assembly, and tips on said mounting plates fabricated from material of a hardness coefficient sufficiently greater than the hardness coefficient of said steel of said inner section, such that said tips will impinge the steel surface of said inner section upon said upward movement of said piston.