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US 4,183,423 AGranted
Ladder hoist
OwnerJames P. Lewisinventor
Life of this patent
Estimating the term…
Abstract
A cart bolted to a short bottom section of a ladder carries a winch. A cable on the winch runs over a pulley on a short top section of the ladder and is connected to a carriage having wheels running in channel-like side members of the ladder. The carriage has an adjustable, folding platform and a back which pivots to a horizontal position when the carriage reaches the top of the ladder. A bottom pushbutton control and a top pushbutton control are provided.
Claims2
In a ladder hoist,
- a sloping, ladder having tracks,
- a frame,
- rollers in the tracks and supporting the frame in a position substantially parallel to the ladder,
- a platform pivotally connected to the top of the frame,
- adjustable brace means connected to the frame and the platform,
- and a back plate pivotally connected to the top of the frame.
3 more elements
a ladder,
- a cart attachable to and detachable from the ladder,
- winch means mounted on the cart,
- and carriage means movable by the winch means up the ladder,
- the carriage means including frame means lying along the ladder, a support platform hinged to the frame means and a back plate hinged to the platform.
1 more element
Dependencies are inferred from the claim text.