Granted Patent B2

US 12,612,994 · App. 18/655,610 · Granted Apr 28, 2026

Inventor: Zhun-An Ma (Ningbo, CN)

F16M11/2057E04H12/2238F16M11/42

Abstract

Claims (30)

1 . A movable base comprising:

a first frame assembly including a plurality of wheels, the first frame assembly configured to be received within a cowl;

a second frame assembly coupled with the first frame assembly, the second frame assembly comprising a U-shape and a plurality of feet, the second frame assembly configured to be received within the cowl; and

an actuator coupled with a first portion of the second frame assembly such that the actuator actuates the second frame assembly to cause the plurality of feet to move relative to the plurality of wheels between a fixed configuration and a movable configuration,

wherein in the fixed configuration, the plurality of feet is at or below a lowermost level of the plurality of wheels and in the movable configuration the plurality of feet are raised above a lowermost surface of the plurality of wheels.

2 . The movable base of claim 1 , wherein the actuator is a screw actuator.

3 . The movable base of claim 1 , wherein the second frame assembly comprises a first lever member, a second lever member, and a lateral member to form the U-shape.

4 . The movable base of claim 1 , wherein the plurality of feet are disposed outwardly relative to the plurality of wheels.

5 . The movable base of claim 1 , wherein the first frame assembly comprises a lateral member, a first side, and a second side coupled together and forming a U-shape.

6 . The movable base of claim 1 , wherein a portion of the second frame assembly is received within a channel of the first frame assembly.

7 . The movable base of claim 6 , wherein the second frame assembly is pivotably coupled to the first frame assembly by a pin.

8 . The movable base of claim 1 , wherein the first frame assembly and the second frame assembly are configured to be integrated with a superstructure.

9 . A movable base comprising:

a first frame assembly comprising a plurality of wheels;

a second frame assembly comprising a lever, a translating member, and a plurality of feet coupled with the second frame assembly, the translating member mounted on a sliding shaft coupled with the first frame assembly; and

an actuator configured to move a first end of the lever 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.

10 . The movable base of claim 9 , wherein the plurality of feet are disposed forwardly and rearwardly relative to the plurality of wheels.

11 . The movable base of claim 9 , wherein the lever is disposed within and pivotably coupled with a member of the first frame assembly.

12 . The movable base of claim 9 , wherein a pivot point between the translating member and the lever comprises a cylindrical member.

13 . The movable base of claim 12 , wherein the cylindrical member is mounted on a shaft disposed within a slot on the translating member.

14 . 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 coupled with a wheel assembly;

a second frame assembly coupled with the first frame assembly, the second frame assembly comprising a plurality of feet; and

an actuator configured to move 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.

15 . The movable base of claim 14 , wherein the actuator comprises a screw having a first end coupled with the second frame assembly and a second end having a driver interface.

16 . The movable base of claim 14 , wherein the plurality of feet are disposed forwardly and rearwardly relative to the wheel assemblies.

17 . The movable base of claim 14 , further comprising one or more slots disposed through the first frame assembly and one or more shafts disposed through the one or more slots, the one or more shafts transferring pivoting motion of the second frame assembly to vertical motion of the plurality of feet.

18 . The movable base of claim 17 , further comprising a transverse member coupled with the second frame assembly and having feet at each end thereof, the transverse member being coupled with the one or more shafts at spaced apart locations between the feet, the transverse member moving along a travel distance within the lower channel members upon actuation of the actuator.

19 . The movable base of claim 14 , wherein the first frame assembly comprises a U-shape.

20 . The movable base of claim 14 , wherein the second frame assembly comprises a U-shape.

Continuity (3)

References Cited (279)

Cited By (1)

US 1,147,698