Patent BE507692A successfully refreshed from Google Patents.
US3672382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically openable and closable umbrella
Assignee: Ideal KK
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Filing: 1971-03-03
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Granted: 1972-06-27
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Expires: 1991-03-03
Abstract
Abstract An improvement of an automatically openable and closable umbrella of the type comprising a shaft composed of relatively telescoping shaft members, rings mounted on said shaft and carrying inner ends of ribs, supporting spokes and tension springs for automatically closing the umbrella, a compression spring mounted within said shaft and adapted to extend the telescoping shaft members thereby to change the relative positions of said rings and automatically open the umbrella, and latches for controlling the operation of the tension and compression springs, wherein the improvement resides in the provision of a steppedly extensible rod assembly mounted within said shaft and adapted to steppedly allow the expansion of said compression spring in order to avoid abrupt one-stroke expansion of the spring which will cause an excessive shock to the structural elements of the umbrella.
Inventors
- 👤 Yoshio Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:22
CPC Classifications
A; A45; A45B; A45B25/00; A45B25/14; A45B25/143
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
328 words
An automatically openable and closable umbrella comprising: a shaft having a tubular outer shaft member, said tubular outer shaft member slidably housing therein an upper, an intermediate and a lower inner tubular shaft member; a first ring fixed to an upper portion of said upper inner shaft member and pivotally carrying ribs and tension spring means for closing the umbrella, said spring means each being connected at one end to an intermediate portion of each of the ribs and at the other end to the first ring at a position spaced from the pivotally mounting position of the ribs; a second ring fixed to the outer shaft member below said first ring and pivotally carrying first supporting spokes for supporting the ribs when they are opened; a third ring slidably mounted on said outer shaft member below said second ring and connected with said intermediate inner shaft member to be co-slidable therewith along said outer shaft member and pivotally carrying connecting rods; a fourth ring slidably mounted on said outer shaft member below said third ring and pivotally carrying second supporting spokes for restricting the ribs when the ribs are close; a compression spring for opening the umbrella, said compression spring being mounted within said outer shaft member and held between said intermediate and lower inner shaft members; a first latch adapted to selectively engage said fourth ring with said outer shaft member; and a second latch adapted to selectively engage said outer shaft member with said lower inner shaft member; said umbrella being characterized by a guide rod assembly mounted within said outer shaft member and including means connecting said intermediate and lower inner shaft members in such a manner as to provide stepwise extension of the distance between said intermediate and lower inner shaft members caused by said compression spring in order to avoid an abrupt one-stroke expansion of the compression spring which could otherwise cause an excessive shock to the structural elements of the umbrella.
Claim 2
Dependent Claim
328 words
An automatically openable and closable umbrella comprising: a shaft having a tubular outer shaft member, said tubular outer shaft member slidably housing therein an upper, an intermediate and a lower inner tubular shaft member; a first ring fixed to an upper portion of said upper inner shaft member and pivotally carrying ribs and tension spring means for closing the umbrella, said spring means each being connected at one end to an intermediate portion of each of the ribs and at the other end to the first ring at a position spaced from the pivotally mounting position of the ribs; a second ring fixed to the outer shaft member below said first ring and pivotally carrying first supporting spokes for supporting the ribs when they are opened; a third ring slidably mounted on said outer shaft member below said second ring and connected with said intermediate inner shaft member to be co-slidable therewith along said outer shaft member and pivotally carrying connecting rods; a fourth ring slidably mounted on said outer shaft member below said third ring and pivotally carrying second supporting spokes for restricting the ribs when the ribs are close; a compression spring for opening the umbrella, said compression spring being mounted within said outer shaft member and held between said intermediate and lower inner shaft members; a first latch adapted to selectively engage said fourth ring with said outer shaft member; and a second latch adapted to selectively engage said outer shaft member with said lower inner shaft member; said umbrella being characterized by a guide rod assembly mounted within said outer shaft member and including means connecting said intermediate and lower inner shaft members in such a manner as to provide stepwise extension of the distance between said intermediate and lower inner shaft members caused by said compression spring in order to avoid an abrupt one-stroke expansion of the compression spring which could otherwise cause an excessive shock to the structural elements of the umbrella.
Claim 3
Dependent Claim
100 words
An umbrella according to claim 1, wherein the guide rod assembly comprises: a guide rod and first and second stopper core members connected with end portions of the guide rod; said stopper core members each being provided with means defining an axial slit therealong; said first stopper core member being connected with said intermediate inner shaft member by a pin passed through said slit and carried by said intermediate inner shaft member; said second stopper core member being connected with said lower inner shaft member by a pin passed through said slit and carried by said lower inner shaft member.
Claim 4
Dependent Claim
39 words
An umbrella according to claim 2, wherein the total of the lengths of said slits of said first and second stopper core members corresponds to the displacement oF said third ring due to opening or closing of the umbrella.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |