Fire escape – ladder – or scaffold – Safety device for ground-supported ladder – Terminal foot or shoe
Patent
1998-09-02
1999-09-14
Chin-Shue, Alvin
Fire escape, ladder, or scaffold
Safety device for ground-supported ladder
Terminal foot or shoe
182129, E06C 748
Patent
active
059507616
ABSTRACT:
A structural member end cap and method, the end cap having a gripping portion and a recessed socket portion sized to snuggly engage a structural member, the end cap including integral engaging means to permit key and keyway engagement to restrict radial movement of assembled parts and fastening means to restrict longitudinal movement of assembled parts.
REFERENCES:
patent: 311790 (1885-02-01), Spangler
patent: 1477742 (1923-12-01), Wright
patent: 3705674 (1972-12-01), Fisher
patent: 4870757 (1989-10-01), Kirkpatrick
patent: 4888846 (1989-12-01), Natale
patent: 5533591 (1996-07-01), Kiska
patent: 5758745 (1998-06-01), Beggs et al.
patent: 5845364 (1998-12-01), Chen
Chin-Shue Alvin
Emerson Electric Company
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