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US 4,457,397 AGranted
Platform for stairs
OwnerJohn J. Scalainventor
Life of this patent
Estimating the term…
Abstract
This invention relates to new and useful improvements in a platform for stairs, and the principal object of the invention is to provide a device which may be effectively employed as a scaffold structure for stairs, or a step-up platform to reach portions of the ceiling and the walls of a room.
Claims1
A platform for stairs comprising:
- a. a platform;
- b. a frame integrally secured to the edges of the platform;
- c. a first plurality of sleeves extending transversely from the bottom portion of the frame secured to a first edge of the platform;
- d. means to attach the first plurality of sleeves to the frame of the platform near the first edge;
- e. a first plurality of lower legs slid inside the first plurality of sleeves and resting on a first step or floor;
- f. means to adjustably and rigidly secure the first plurality of legs to the first plurality of sleeves;
- g. a second plurality of sleeves extending transversely from the middle portion of the platform and supporting the middle portion of the platform;
- h. a second plurality of lower legs slid inside the first pluarlity of sleeves and resting on a second step one step higher than the first step or the floor;
- i. means to attach the second plurality of sleeves to the middle portion of the platform;
- j. means to secure the second plurality of legs adjustably and rigidly to the second plurality of sleeves;
- k. a bottom portion of the platform and frame including the second end of the platform opposite the first end of the platform supported by resting horizontally against a third stair step two steps higher on the stairs than the first stair step or floor.
8 more elements
Dependencies are inferred from the claim text.