Abstract Self-opening and self-closing umbrella which has a hollow stick, a top hub member secured to the top of the stick to pivotally support a plurality of main ribs, a lower hub member slidably mounted on the stick, an intermediate hub member slidably mounted on the stick between the top hub member and the lower hub member, a plurality of auxiliary ribs each pivotally engaged at one end to the intermediate hub member and at the other end to the intermediate portions of the main ribs, a plurality of stays each pivotally engaged at one end to the intermadiate portions of the main ribs together with the auxiliary ribs and at the other end to the lower hub member, a resilient engaging member having an engaging projection and a laterally-projecting stud integrally formed thereto for engaging the lower hub member upon closing of the umbrella, an operating lever movably inserted into the stick so that the top thereof projects when the umbrella is closed from the intermediate hub member, a coil spring disposed in the stick secured at one end to the intermediate hub member and at the other end to a predetermined portion of an operating lever so that when the top of the operating lever is depressed into the stick, the lower end of the operating lever is removably engaged to the lower end of the stick wherein the length of the coil spring upon opening of the umbrella is equal or longer than that of the umbrella upon closing of the umbrella, and a plurality of springs each secured at one end to the pivotal points of the auxiliary ribs and stays and at the other end to the lower hub member for providing an opening force of the main ribs.
Inventors
👤 S Yoshihara
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-26 22:23
CPC Classifications
A; A45; A45B; A45B25/00; A45B25/14; A45B25/143
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
342 words
A self-opening and self-closing umbrella comprising: a hollow stick (1) with a top portion for supporting an umbrella cover and a lower portion towards an umbrella handle, said lower portion having an aperture (10''); a top hub member (3), secured to the top of said stick to pivotally support a plurality of main ribs (2), a lower hub member (5), slidably mounted on said stick, an intermediate hub member slidably mounted on said stick between said top hub member (3) and said lower hub member (5); a plurality of auxiliary ribs (6) each pivotally engaged at one end to said intermediate hub member (4) and at the other end to the intermediate portions of said main ribs (2), a plurality of stays (7) each pivotally engaged at one end to said lower hub member (5) and at the other end to said auxiliary ribs (6) at pivotal points (b); a resiLient engaging member (11) having an engaging projection and a laterally projecting integral stud (10) projecting from said aperture (10''), for engaging the lower hub member upon closing of the umbrella; an operating lever (12) movably inserted into said stick (1) so that the top thereof projects from said top hub member when the umbrella is closed; a coil spring (15) disposed in said stick secured at one end to said intermediate hub member (4), and at the other end to a predetermined portion of said operating lever (12) so that when the top of said operating lever (12) is depressed into said stick, the lower end of said operating lever (12) is removably engaged to the lower end of said stick the length of said coil spring upon opening of the umbrella being equal or longer than that of the umbrella upon closing of the umbrella and a plurality of secondary springs (8) each secured at one end to said pivotal points (b) of said auxiliary ribs (6) and stays (7) and at the other end to the lower hub member (5) for providing an opening force of said main ribs.
Claim 2
Dependent Claim
342 words
A self-opening and self-closing umbrella comprising: a hollow stick (1) with a top portion for supporting an umbrella cover and a lower portion towards an umbrella handle, said lower portion having an aperture (10''); a top hub member (3), secured to the top of said stick to pivotally support a plurality of main ribs (2), a lower hub member (5), slidably mounted on said stick, an intermediate hub member slidably mounted on said stick between said top hub member (3) and said lower hub member (5); a plurality of auxiliary ribs (6) each pivotally engaged at one end to said intermediate hub member (4) and at the other end to the intermediate portions of said main ribs (2), a plurality of stays (7) each pivotally engaged at one end to said lower hub member (5) and at the other end to said auxiliary ribs (6) at pivotal points (b); a resiLient engaging member (11) having an engaging projection and a laterally projecting integral stud (10) projecting from said aperture (10''), for engaging the lower hub member upon closing of the umbrella; an operating lever (12) movably inserted into said stick (1) so that the top thereof projects from said top hub member when the umbrella is closed; a coil spring (15) disposed in said stick secured at one end to said intermediate hub member (4), and at the other end to a predetermined portion of said operating lever (12) so that when the top of said operating lever (12) is depressed into said stick, the lower end of said operating lever (12) is removably engaged to the lower end of said stick the length of said coil spring upon opening of the umbrella being equal or longer than that of the umbrella upon closing of the umbrella and a plurality of secondary springs (8) each secured at one end to said pivotal points (b) of said auxiliary ribs (6) and stays (7) and at the other end to the lower hub member (5) for providing an opening force of said main ribs.
Claim 3
Dependent Claim
52 words
The self-opening and self-closing umbrella as set forth in claim 1, wherein said operating lever has a top interior and said coil spring is disposed in said operating lever secured at one end to said intermediate hub member and disposed at the other end into said top interior of said operating lever.