Patent ID: 11903350
Assignee: LINDSAY CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC A  B | IPC A  B

Claim 4:
5. The mobile tower of claim 4, wherein
the first and second spindles each further include second, third, and fourth side walls connected to one another to form a quadrilateral cross-sectional shape and the second and fourth side walls each include a lengthwise groove, and
the mobile tower further comprises
a first roller cage connected to a lower end of the first side of the frame, the first roller cage including a first roller positioned in the groove of the second side wall of the first spindle and a second roller positioned in the groove of the fourth side wall of the first spindle,
a second roller cage connected to an upper end of the first side of the frame, the second roller cage including a first roller positioned in the groove of the second side wall of the first spindle and a second roller positioned in the groove of the fourth side wall of the first spindle,
a third roller cage connected to a lower end of the second side of the frame, the third roller cage including a first roller positioned in the groove of the second side wall of the second spindle and a second roller positioned in the groove of the fourth side wall of the second spindle, and
a fourth roller cage connected to an upper end of the second side of the frame, the fourth roller cage including a first roller positioned in the groove of the second side wall of the second spindle and a second roller positioned in the groove of the fourth side wall of the second spindle.