Umbrellas

Claim 1

In a collapsible, automatically openable umbrella comprising: a telescopic dual shaft including a tubular outer upper shaft member and a tubular inner lower shaft member, the latter being slidably received in the former; a top member fixed to the top of said upper shaft member and adapted to carry pivotable ends of a plurality of ribs; said ribs each including a main rib member and an auxiliary rib member, the latter being slidably received in the former; a grip mounted at the lower end of said lower shaft member; a compression spring housed in said upper shaft member for urging said two shaft members to mutually extended positions; a tubular intermediate member slidably mounted on said dual shaft and adapted to carry pivotable ends of rib-supporting spokes; a tubular lower member slidably mounted on said dual shaft below said tubular intermediate member and adapted to carry spokesupporting rods; and a compressible spring mounted on said dual shaft between said tubular intermediate and lower members for urging these two members relatively apart, whereby those two members are moved upward along said dual shaft while effecting automatic opening of the umbrella with concurrent extension of the auxiliary rib members from their mating main rib members upon release of a latch provided in a lower portion of said lower shaft member; the improvement wherein: said latch is adapted to catch said tubular lower member at two closely adjacent positions, at one of which the tips of said auxiliary rib members can be engaged into a flange formed at said grip and at the other of which said tips are disengaged from said flange; a spring-urged push up means being mounted in said grip and adapted to resiliently urge said tubular lower member upward from its lowermost position; and a resilient member being mounted on said tubular intermediate member for assisting the movement of said ribs away from said dual shaft.