US4149553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opening and closing device for an umbrella
Assignee: Individual
•
Filing: 1978-07-21
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Granted: 1979-04-17
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Expires: 1998-07-21
Abstract
Abstract The present invention relates to an opening and closing device for an umbrella which can be easily handled by a single hand; in which a button structure is positioned between a handle and a shaft to control an open-close transmission device rotated by a ratchet gear, thereby to actuate hard steel wire thereof to retract periodically, thus the opening and closing of the umbrella can be handled by a single hand.
Inventors
- 👤 Ying-I Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
A; A45; A45B; A45B25/00; A45B25/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A device for opening and closing an umbrella comprising: a casing having two connecting cylinders with female threads formed therein for engaging with the shaft and the handle; a trigger lever mounted near the edge of an opening of said casing for actuating the device; a ratchet gear pivoted on a central stud inside the casing of the device, with a movable plate rotatably mounted on the edge thereof; and being actuated by said trigger lever; a check pawl, set inside the casing the device for preventing the ratchet gear from reverse rotation; a steel wire, with one end mounted the tip of said movable plate, adopted in the shaft of an umbrella with the other end thereof connected to the runner; the steel wire will move up or down when said ratchet gear is actuated by the trigger lever, thereby to open or close the umbrella.
Claim 2
Independent Claim
147 words
A device for opening and closing an umbrella comprising: a casing having two connecting cylinders with female threads formed therein for engaging with the shaft and the handle; a trigger lever mounted near the edge of an opening of said casing for actuating the device; a ratchet gear pivoted on a central stud inside the casing of the device, with a movable plate rotatably mounted on the edge thereof; and being actuated by said trigger lever; a check pawl, set inside the casing the device for preventing the ratchet gear from reverse rotation; a steel wire, with one end mounted the tip of said movable plate, adopted in the shaft of an umbrella with the other end thereof connected to the runner; the steel wire will move up or down when said ratchet gear is actuated by the trigger lever, thereby to open or close the umbrella.
Claim 3
Dependent Claim
42 words
A device for opening and closing an umbrella according to claim 1, wherein said trigger lever further comprises a ratchet pawl cooperating with the teeth of the ratchet gear for pushing said gear to rotate when the trigger lever is pressed down.
Claim 4
Dependent Claim
38 words
A device for opening and closing an umbrella according to claim 1, further comprising a spring for actuating said trigger lever making the ratchet pawl of the trigger lever in touch with the teeth of the ratchet gear.
Claim 5
Dependent Claim
74 words
A device for opening and closing an umbrella according to claim 1, wherein said ratchet gear pivoted on the central stud inside the casing of the device, has a plurality of teeth; each time the trigger lever is pressed and closed, said ratchet gear is advanced by one tooth; said movable plate, rotating along with said ratchet gear, will move the steel wire to go up or down for opening or closing the umbrella.
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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |