Patent ID: 11897570
Assignee: nan
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 3:
4. The bicycle assembly of claim 2, further comprising:
a. a second tubular member comprising a first interface portion;
b. a third tubular member comprising a first interface portion; and
c. a fourth tubular member comprising a first interface portion;
wherein second tubular member is engaged through the first exterior interface portion of the first partial tube member;
wherein the first interface portion of the second tubular member is friction stir welded to the first internal interface portion of the first partial tube member;
wherein the third tubular member is engaged through the first exterior interface portion of the second partial tube member;
wherein the first interface portion of the third tubular member is friction stir welded to the first internal interface portion of the second partial tube member;
wherein the fourth tubular member is engaged through the first exterior interface portion of the second partial tube member; and
wherein the first interface portion of the fourth tubular member is friction stir welded to the first internal interface portion of the second partial tube member.