Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Trestle
Patent
1994-12-29
1995-11-21
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Unitary foldable, rigid scaffold or ladder
Trestle
182151, B27B 2700
Patent
active
054678420
ABSTRACT:
There is disclosed an improved collapsible saw horse comprising a horizontal member over the center of which is affixed a tubular spacer. Left and right rotatable sleeves are disposed over the horizontal member on each side of the tubular spacer to obtain an assembled crossbar. Four legs, each connected to a collar complementary to the horizontal member, serve to support the horizontal member. The legs are further defined as a left outer leg, left inner leg, right inner leg, and right outer leg. The collars are of a shape similar to the rotatable sleeves and the tubular spacer such that when disposed over the horizontal member a smooth profile is obtained. Four angled braces are arranged as follows: (1) a first brace from the left outer leg to the left rotatable sleeve; (2) a second brace from the left inner leg to the tubular spacer; (3) a third brace from the right inner leg to the tubular spacer; and (4) a fourth brace from the right outer leg to the right rotatable sleeve. A cover is provided for the crossbar to further smooth its surface, and chains are affixed between each pair of legs so that a maximum pivoting angle between the legs is established.
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