- 专利标题： Ball Joint Base and Twist Lock for Slideable Concentric Members Adapted for Use in Umbrellas with Extensible Canopy Ribs
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申请号： US16386252申请日： 2019-04-16
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公开(公告)号： US20200069011A1公开(公告)日： 2020-03-05
- 发明人: David L. LeAnna
- 申请人： David L. LeAnna
- 主分类号： A45B25/22
- IPC分类号： A45B25/22 ; A45B17/00 ; A45B25/08
摘要：
A twist lock mechanism for easily achieving a secure locking relationship between an outer member and an inner member is provided for use on an umbrella with a ball-joint based for adaptive orientation, and a spike receiving base or anchoring base mechanism.
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