Fire escape – ladder – or scaffold – Ladder and platform – Platform with ladder as support
Patent
1995-09-15
1997-07-15
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Ladder and platform
Platform with ladder as support
182121, 182107, E06C 104
Patent
active
056474520
ABSTRACT:
A scaffold jig including a first T-bar that has a first horizontal bar with a first vertical bar extending therefrom. The first vertical bar has a plurality of adjustment holes. Also included is a second T-bar that has a first horizontal U-iron with a second vertical bar extending therefrom. The first U-iron has an opening passing therethrough. The second vertical bar has a bracket with a bracket opening projecting therefrom. The second vertical bar receives the first vertical bar therein to form a support bar. Included is a third T-bar that has a second horizontal U-iron with a third vertical bar extending therefrom. The second U-iron has an opening therethrough and is supported by a step of a ladder. Lastly, a straight bar is included that has a first end positioned between the support bracket, and a second end positioned within the third vertical bar, and a plurality of adjustment holes. The straight bar forms a support brace to support the support bar.
REFERENCES:
patent: 328999 (1885-10-01), Ballmann
patent: 662566 (1900-11-01), Jones
patent: 2680554 (1954-06-01), Dakin
patent: 3179205 (1965-04-01), Rowlette
patent: 3454132 (1969-07-01), Platino et al.
patent: 3734236 (1973-05-01), Houlter
patent: 4121692 (1978-10-01), Morawski
patent: 4331217 (1982-05-01), Stecklow
patent: 4941547 (1990-07-01), Livick
patent: 5373913 (1994-12-01), Santos
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