US3729012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-closing umbrella
Assignee: KNIRPS INTERNATIONAL A GERMAN CORP GmbH
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Filing: 1971-01-25
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Granted: 1973-04-24
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Expires: 1991-01-25
Abstract
Abstract A self-closing umbrella wherein there are two telescopic stick portions, a crown at the end of one stick portion with the dome ribs hinged thereto, a secondary crown fixed to the free end of the other telescopic stick portion, a runner adapted to slide on the other stick portion with stretcher means extending to the dome ribs and struts hinged to the stretcher means and to the second crown. A tension spring is arranged between the two telescopic stick portions so that when the umbrella stick is telescoped together, the dome ribs are opened and the tension spring is loaded. When the spring is released, the telescopic stick extends to its fullest extent and the dome ribs are closed on the stick.
Inventors
- 👤 H Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:58
CPC Classifications
A; A45; A45B; A45B25/00; A45B25/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
176 words
An umbrella frame including a dome and at least a two-piece telescopic stick comprising first and second tubular sections, lock means operatively connected to said sections for retaining said sections in telescoped relation, a tension spring inside said stick sections and being loaded when said sections are telescoped together, the force of said spring, upon release of said lock means which holds the sections of the stick in telescoped relation, producing closing movement of the frame dome, the first stick section including a crown, an end of the spring toward the crown being attached to a rod projecting the first stick section toward the crown, another end of the spring engaging a slidable part movable in the stick, a lower edge portion of the first stick section engaging said slidable part and said part including an axial opening for passage of the rod, said slidable part including locking recess means defined in a surface portion for accomodating locking ball means; and locking ball means in said second stick section for engagement in said locking recess means.
Claim 2
Dependent Claim
176 words
An umbrella frame including a dome and at least a two-piece telescopic stick comprising first and second tubular sections, lock means operatively connected to said sections for retaining said sections in telescoped relation, a tension spring inside said stick sections and being loaded when said sections are telescoped together, the force of said spring, upon release of said lock means which holds the sections of the stick in telescoped relation, producing closing movement of the frame dome, the first stick section including a crown, an end of the spring toward the crown being attached to a rod projecting the first stick section toward the crown, another end of the spring engaging a slidable part movable in the stick, a lower edge portion of the first stick section engaging said slidable part and said part including an axial opening for passage of the rod, said slidable part including locking recess means defined in a surface portion for accomodating locking ball means; and locking ball means in said second stick section for engagement in said locking recess means.
Claim 3
Dependent Claim
27 words
An umbrella frame according to Claim 1, characterized in that the locking recess means comprises an annular groove located in a reduced section of the slidable part.
Claim 4
Dependent Claim
35 words
An umbrella frame according to claim 1 characterized in that a filler part movable axially against the action of the spring when the slidable part abuts it, is operatively associated with the locking ball means.
Claim 5
Dependent Claim
52 words
An umbrella frame according to claim 1, characterized in that the locking ball means is surrounded by an external sleeve slidable on the second stick section and operative as a release grip, said sleeve having a two-stage annular recess for controlling the locking ball means, and being spring-loaded in a locking direction.
Claim 6
Dependent Claim
23 words
An umbrella frame according to claim 3, characterized in that the rod passes through the filler part and through a filler part spring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |