The present invention discloses a load-carrying device such as a suitcase, a carry-bag and a hand truck, which can ascend and descend stairs without changing the position of the person relative to the device. The load-carrying device is constructed with a main frame which defines a main plane of the device, at least two main wheels, and a support frame which can swing out of the main plane. The support frame is equipped with a caterpillar mechanism and optional bottom wheels. When ascending stairs, the support frame is pushed against the main frame by the edge of the stairs and the caterpillar with a ratchet mechanism helps slide the load-carrying device upward. When descending stairs, the support frame swings down toward the lower step before the main wheels go off the upper step so that the support frame enables soft-landing of the main wheels.
SUITCASE AND HAND TRUCK FOR ASCENDING AND DESCENDING STAIRS
2021-04-22
Patent
Elektronische Ressource
Englisch
IPC: | B62B Von Hand bewegte Fahrzeuge, z.B. Handkarren oder Kinderwagen , HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS |
SUITCASE AND PERSON LOAD CARRYING DEVICE CAPABLE OF ASCENDING AND DESCENDING STAIRS
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