Patent ID: 7185755

Claim:
An elongated lifting/holding slat, comprising: an upper portion, and a lower portion; said upper portion including a top, opposite sidewalls extending downwardly from the top, and bottom flanges extending laterally inwardly from the bottoms of the sidewalls; said lower portion having a top, sidewalls extending downwardly from the top, laterally inwardly extending bottom flanges at the bottoms of the sidewalls, and laterally outwardly extending lock flanges; said lock flanges on the lower portion being positioned above the bottom flanges on the upper portion; a first cam secured to the top of the upper portion and a second cam secured to the upper portion of the slat, said first and second cams being housed within the upper portion of the slat, between the top of the lower portion and the top of the upper portion, said cam on the top of the lower portion of the slat being adapted to contact the cam carried by the upper portion of the slat; and said lower portion of the slat being adapted to be movable longitudinally in one direction to cause the lower cams to slide along the upper cams and raise the upper portion of the slat relative to the lower portion of the slat and, and movable in the opposite direction to lower the upper portion of the slat relative to the lower portion of the slat.