Patent ID: 9027580
Filing Date: 2015-05-12
Classification: A45B

Abstract:
1. An umbrella comprising: a plurality of ribs comprising first ribs having a first rib length and second ribs having a second rib length shorter than the first rib length, wherein the first ribs and the second ribs are arranged around a shaft in a first pattern of alternating lengths; a plurality of stretchers arranged around the shaft, the plurality of stretchers comprising first stretchers having a first stretcher length and second stretchers having a second stretcher length shorter than the first stretcher length, wherein each of the first stretchers is attached to a respective one of the first ribs, wherein each of the second stretchers is attached to a respective one of the second ribs; and cloth attached to and disposed between the ribs; wherein the rib structure has an open state and a closed state, wherein in the open state, the first ribs, the first stretchers, the second ribs, and the second stretchers create a form having a second pattern of alternating heights that alternates between a first vertical height and a second vertical height lower than the first vertical height, and wherein each of the first ribs is between two of the second ribs and has the first vertical height, and each of the second ribs is between two of the first ribs and has the second vertical height, wherein portions of the cloth disposed between a first rib and a second rib are not expandable and contractible in a first direction associated with a length of the second rib, but are expandable and contractible in a second direction perpendicular to the first direction.