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US 5,526,890 AGranted
Automatic carrier capable of smoothly changing direction of motion
AssigneeNEC Corporation
InventorYoshimi Kadowaki
Life of this patent
Estimating the term…
Abstract
In an automatic carrier having a body and a wheel base rotatably mounted on the body, a driving wheel is fixed to the body and a driven wheel is fixed to the wheel base. The direction of the driven wheel can be changed. A lifting mechanism is provided to lift the wheel base, i.e., the driven wheel.
Claims18
An automatic carrier comprising:
- a body;
- a driving wheel fixed to said body;
- a wheel base rotatably mounted on said body;
- at least one driven wheel fixed to said wheel base;
- changing means for changing a direction of said driven wheel with respect to said wheel base;
- and
- lifting means, coupled to said wheel base, for lifting said wheel base whereby the at least one driven wheel is lifted from a supporting surface.
4 more elements
An automatic carrier comprising:
- a body;
- a driving wheel fixed to an approximately center portion of said body;
- a first wheel base rotatably mounted on a front side of said body;
- a second wheel base rotatably mounted on a back side of said body;
- first driven wheels fixed to said first wheel base;
- second driven wheels fixed to said second wheel base;
- first changing means for changing a direction of said first driven wheels with respect to said first wheel base;
- second changing means for changing a direction of said second driven wheels with respect to said second wheel base;
- first lifting means, coupled to said first wheel base, for lifting said first wheel base;
- and
- second lifting means, coupled to said second wheel base, for lifting said second wheel base.
8 more elements
Dependencies are inferred from the claim text.