|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 14|
A single piece unitary metal coupling includes a first end, a second end, and a convolution between the first and second ends. The convolution includes at least one cylindrically-shaped tip end.
The invention claimed is: 1. A single piece unitary metal coupling comprising:a first end;a second end; anda plurality of convolutions between the first and second ends, adjacent convolutions separated by a land, each convolution of the plurality of convolutions including:a cylindrically-shaped tip end having substantially uniform material thickness disposed at an external plateau of the convolution, relative to an axis of the coupling;a convolution arm extending from the cylindrically-shaped tip end toward the land and having an outer wall and an inner ...