Patent attributes
A windproof umbrella includes a center post (10) including an upper grommet (11), an intermediate fixed ring (12), and a lower sliding runner (13); ribs (20) each having one end (21) pivotably secured to the grommet (11) and the open other end (22); main joints (51) each formed at a portion of the rib (20); stretchers (30) each having one end (31) pivotably secured to the ring (12) and the other end (32) moveably secured to the main joint (51); auxiliary joints (61) each formed at a portion of the stretcher (30); and struts (40) each having one end (41) pivotably secured to the runner (13) and the other end (42) moveably secured to the auxiliary joint (61); a lower canopy (70) secured in covering relation on the ribs (20); and an upper canopy (80) having a peripheral edge positioned over a portion of the lower canopy (70).
