Ladder step

Details Ladder step Ladder step

1996-05-15

1998-05-19

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Ladder with pivoted prop

182 22, 182 26, 182180, E06C 100

Patent

active

057525811

ABSTRACT:
An apparatus for supporting a ladder in inclined position without the necessity for engaging a separate support surface comprises an X-shaped support frame defined by a pair of posts crossing at a junction and interconnected by a beam at a position below the junction to hold the posts in the X-shape. At the top of each post is provided a U bracket which engages underneath a rung of the ladder. A cable passes between the beam and a selected rung of the ladder to hold the triangle against spreading. A second cable extends from the junction of the X frame to the rung carried in the U brackets at the top of the posts.

REFERENCES:
patent: 314118 (1885-03-01), Foster
patent: 487469 (1892-12-01), Burgess
patent: 798012 (1905-08-01), Clark
patent: 992051 (1911-05-01), Petrie
patent: 1110700 (1914-09-01), LeVey
patent: 1207552 (1916-12-01), Hill
patent: 1312725 (1919-08-01), Gagnier
patent: 1442694 (1923-01-01), Martin

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