초록 ▼

An automatic tilt adjusting bracket for connection between a pole handle and a concrete float blade. The bracket includes a base member, a cover member and mechanical linkage interconnecting the base and cover members. As the pole handle is pushed and pulled, a force is applied to the cover member p

An automatic tilt adjusting bracket for connection between a pole handle and a concrete float blade. The bracket includes a base member, a cover member and mechanical linkage interconnecting the base and cover members. As the pole handle is pushed and pulled, a force is applied to the cover member pivoting the base member relative thereto for automatically lifting the leading edge of the float blade.

대표청구항 ▼

An automatic tilt adjusting bracket for connecting a pole handle and a concrete float blade for finishing concrete, in which the float blade includes a finishing face for movement across the top surface of the concrete as a worker pushes and pulls the pole handle, and wherein the float blade has a p

An automatic tilt adjusting bracket for connecting a pole handle and a concrete float blade for finishing concrete, in which the float blade includes a finishing face for movement across the top surface of the concrete as a worker pushes and pulls the pole handle, and wherein the float blade has a pair of edges providing a trailing edge and leading edge during movement of the blade, the tilt adjusting bracket being adapted for securement to the top side of the float blade and to one end of the pole handle, said tilt adjusting bracket automatically adjusting the position of tilt of said float blade with respect to the top surface of the concrete in accordance with the wetness of the concrete during the movement of the finishing face across the top surface of the concrete, said tilt adjusting bracket comprising: first member means defining a base for securement to the top side of the float blade, said first member means including first and second axes disposed parallel to one another and spaced apart by a prefixed distance; second member means mechanically linked to said first member means for moving relative thereto, said second member means including third and fourth axes disposed parallel to one another and parallel to said first and second axes, said third and fourth axes being spaced apart by a distance greater than said prefixed distance between said first and second axes, said first and third axes forming a first plane and said second and fourth axes forming a second plane, said first and second planes intersecting at a line disposed below the float blade, said line being spaced below the float blade at a distance to provide a force moment for causing an automatic adjustment of the position of tilt of the float blade during movement thereof across the concrete surface in accordance with the wetness of the concrete, said first member means moveable to a plurality of positions of tilt with respect to said second member means; mechanical linkage means interconnecting said second member means to said first member means for controlling movement of said first member means relative to said second member means, said mechanical linkage means conjointly pivoting said first axis relative to said third axis along a first arcuate path and pivoting said second axis relative to said fourth axis along a second arcuate path, said mechanical linkage means tilting said first member means relative to said second member means to a first position of tilt when the wetness of the concrete against the float blade is at a first frictional level during movement of the finishing face across the top surface of the concrete and tilting said first member means to a second position of tilt different from said first position of tilt when the wetness of concrete is at a second frictional level different than said first frictional level during movement of the finishing face across the top surface of the concrete and tilting said first member means to a third position of tilt different than said first and second positions of tilt when the wetness of concrete is at a third frictional level different than said first and second frictional levels during movement of the finishing face across the top surface of the concrete; and pole securement means for connecting the pole handle to said second member means for providing the pushing and pulling force supplied through the pole handle to said second member means to move the float blade across the concrete, the pushing of the pole handle applying a force to said second member means tilting said first member means relative to said second member means to at least one of a plurality of tilt positions for lifting the leading edge of the float blade upward due to the frictional drag of concrete on the float blade and the pulling of the pole handle applying a force to said second member means tilting said first member means relative to said second member to at least one of a plurality of tilt positions for lifting the leading edge of the float blade upward due to drag of concrete on the float blade.