Ladder lift with swivel tray

Details Ladder lift with swivel tray Ladder lift with swivel tray

1995-03-31

1996-08-13

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Combined

182141, E06C 700

Patent

active

055447180

ABSTRACT:
A mechanical device that supports a variable height tray (20) which is removable or may be swiveled out of the way for storage. It is connected to the cross bar support (24) by it's tray arms (42) at the tray pivots (40) which protrude as studs from the cross bar support (24). The cross bar support (24) is attached to steel threaded shafts (26) with shaft nuts (22). The shafts (26) are inserted into the retraction tubes (38) that provide support. Engagement windows (30) allow the spring loaded clamps (32) to engage against the threaded edges of the shafts (26) thus allowing them to lock into place at the desired height. The spring loaded clamps (32) are attached to the retraction tubes (38) with pipe clamps (34) and their leverage ends are tied together in tandem fashion with a release bar (36) that permits simultaneous operation. The entire mechanism is mounted to a step ladder with screws and standard electro mechanical tubing clamps.

REFERENCES:
patent: 131042 (1872-09-01), Wolf
patent: 2923373 (1960-02-01), Ledgerwood
patent: 3269682 (1966-08-01), Alpine
patent: 3490558 (1970-01-01), Foley
patent: 4261435 (1981-04-01), Winter
patent: 4418793 (1983-12-01), Brent
patent: 4560031 (1985-12-01), Dixon

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