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US 4,450,935 AGranted
Portable adjustable roof platform
OwnerDavid C. Gustavusinventor
Life of this patent
Estimating the term…
Abstract
A portable adjustable roof platform for use with a roof ladder so as not to damage a sloped roof surface. The roof platform may be quickly engaged with the roof ladder and adjusted to the horizontal position without handling small locating or fastening parts. The roof platform folds into a compact closed configuration for ease of transportation.
Claims4
A portable adjustable roof platform for use with a roof ladder comprising:
- a generally U-shaped base having a flat frame portion and at least two supporting walls depending therefrom, each supporting wall terminating in a lower surface and being formed with an L-shaped notch opening onto the lower surface, the notch being sized slightly larger than a ladder rung, each supporting wall being formed with a generally rectangular notch opening onto the lower surface, the notch being sized substantially greater than a ladder rung and extending toward the flat frame portion and having a lower portion spaced from the L-shaped notch opening such that the openings of the L-shaped and rectangular notches receive corresponding ladder rungs simultaneously;
- b. step means pivotally supported close to one end of the base;
- c. a toggle mechanism linking the step means to the base and including a threaded support bar;
- and
- d. toggle actuating means connected to the base at the end opposite the step means pivotal support,
- so that actuating the toggle actuating means causes the step means to pivot relative to the base.
3 more elements
A method of securing an adjustable roof platform to a roof ladder comprising the steps of:
- a. securing the ladder to the roof;
- b. providing a roof platform having a base formed with at least two substantially vertical side walls having lower surfaces, each side wall defining an L-shaped notch and a generally rectangular notch opening from the lower surface thereof, the L-shaped notch and the rectangular notch being spaced to receive corresponding rungs of the ladder simultaneously;
- c. moving the platform perpendicular to the plane of the ladder rungs to receive corresponding rungs simultaneously in the L-shaped and rectangular notches;
- and
- d. moving the platform parallel to the plane of the ladder to hook the L-shaped notch to the corresponding rung while continuously engaging the rectangular notch with the corresponding rung.
2 more elements
Dependencies are inferred from the claim text.