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US 12,007,065 B2Granted
Movable bases for shade structures
OwnerZhun-An Mainventor
Life of this patent
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Abstract
A movable base for a shade structure such as an umbrella that is operable between a movable configuration and a braked configuration. The movable base includes a first frame, including a plurality of wheels, such as caster wheels, and a second, e.g., movable, frame that is actuatable relative to the first frame and wheels. In the movable position, a plurality of feed are raised and the wheels are in contact with a ground surface. In the fixed position, the feet of the second frame are in contact with the ground and/or the wheels are raised.
Claims20
A movable base, comprising:
- a mounting location;
- a superstructure providing support to the mounting location;
- a first frame having a plurality of wheels for supporting the movable base on a ground surface;
- and
- a second frame, comprising:
- a plurality of spaced apart ground contact members, the second frame having an engaged position in which the ground contact members are in contact with the ground surface and a disengaged position in which the ground contact members are spaced above the ground surface;
- a lever arm pivotably coupled to and disposed at least partially within a channel of the first frame, the lever arm pivoting between first and second positions;
- and
- a screw actuator coupled to the lever arm to secure the lever arm in either or both of a first position corresponding to the engaged position of the spaced apart ground contact members or a second position corresponding to the disengaged position of the spaced apart ground contact members.
6 more elements
A movable base comprising:
- a first frame assembly including a plurality of wheels;
- a second frame assembly coupled with the first frame assembly and including a plurality of feet;
- and
- a screw actuator including a screw member and a screw plate;
- wherein the screw actuator is coupled with a lever member of the second frame assembly such that rotation of a screw in a first direction actuates the lever member to cause the plurality of feet to translate downward relative to the plurality of wheels, where translation of the plurality of feet downward lifts the plurality of wheels off a ground surface, and rotation of the screw in a second direction actuates the lever member to cause the plurality of feet to translate upward relative to the plurality of wheels allowing the weight of the movable base to cause the plurality of wheels to contact the ground surface;
- wherein in a fixed configuration, the plurality of feet are at or below a lowermost level of the plurality of wheels and in a movable configuration the plurality of feet are raised above a lowermost surface of the plurality of wheels.
3 more elements
A movable base comprising:
- a first frame assembly including an upper channel member and two spaced apart lower channel members, the lower channel members each couple with a wheel assembly;
- a second frame assembly coupled with the first frame assembly, the second frame assembly including a lever and a plurality of feet coupled with the lever;
- a cover enclosing the first frame assembly and the second frame assembly;
- and
- an actuator accessible at an outside surface of the cover, the actuator configured to move a first end of the lever to cause the plurality of feet to be extended in a direction away from a bottom surface of the lower channel members to cause the plurality of feet to bear at least a portion of a weight of the movable base to provide a braking effect reducing or eliminating movement of the movable base.
2 more elements
Dependencies are inferred from the claim text.