Patent ID: 11898675
Assignee: SHANGHAI VISION MECHANICAL JOINT CO., LTD
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. The method, as recited in claim 14, wherein each of said engaging surfaces has a proximate end point adjacent to said pivotally connecting element and a distal end point adjacent to said fastening element, wherein said varying radiuses of curvatures of each of said engaging surface are gradually increased from said proximate end point to said distal end point, so as to define said gap gradually increased from said proximate end point to said distal end point between each of said engaging surfaces and the corresponding groove circumference of each of the pipe elements when said coupling members is at a preassembled position in which said coupling members are arranged for encircling the pipe element to align said engaging keys with the grooves respectively.