Handcart with foldable wheels
OwnerChin-Lin Changinventor
Life of this patent
Estimating the term…
Abstract
A handcart has a base frame, a handle assembly, two wheel brackets, multiple wheels and two levers. The handle assembly is retractably connected to the base frame. Each wheel bracket is pivotally attached to one side of the base frame with a pivot pin. At least one of the wheels is rotatably mounted on each wheel bracket. One end of each lever is pivotally connected to each pivot pin, and another end is operationally connected to the handle assembly. Accordingly, the wheel brackets with the wheels will be automatically retracted or expanded through transmissions of the levers when the handle assembly is moved to an expanded position or a retracted position. The size of an object with the handcart can be minimized. In addition, getting the indoors dirty is avoided.
Claims11
A handcart comprising:
- a base frame;
- a handle assembly retractably attached to the base frame;
- a wheel bracket pivotally attached to each side of the base frame with a pivot pin;
- at least one wheel rotatably mounted on each wheel bracket;
- a lever with one end pivotally connected to each wheel bracket and another end operationally connected to the handle assembly;
- wherein the handle assembly has:
- two outer tubes respectively mounted on one side of the base frame and parallel to each other;
- a slot longitudinally defined in each outer tube for the corresponding one of the levers to extend through the slot;
- and
- a handle slidably mounted on the outer tube for the corresponding one of the levers to extend through the slot;
- and
- a handle slidably mounted on the outer tubes and having:
- a sliding tube slidably inserted into each outer tube and operationally connected to each lever:
- a handgrip mounted on tops of the sliding tubes;
- and
- a first means to hold each sliding tube in position relative to the corresponding outer tube,
- whereby the wheel brackets pivot relative to the base frame through transmission of the lever when the handle assembly is moved to an expanded position or a retracted position.
Dependencies are inferred from the claim text.