Patent US2060611A successfully refreshed from Google Patents.
US4418707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device of an automatic opening umbrella
Assignee: Individual
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Filing: 1982-02-04
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Granted: 1983-12-06
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Expires: 2002-02-04
Abstract
Abstract A locking device for an automatic opening umbrella having the function of an anti-missrelease and automatic locking device wherein a push button and a button seat are formed in conjunction with a spring element, whereby, by just pushing forward and depressing said button to unlock the locking device and thus continuously complete the action of automatically opening the umbrella. The push botton will automatically return to its original position in a locking up condition after the force against the button is released.
Inventors
- 👤 Tsun Z. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:44
CPC Classifications
A; A45; A45B; A45B25/00; A45B25/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
A locking device for an automatic opening umbrella comprising: a seat housed within a handle of the umbrella, said seat having a recess communicating with an opening formed in said handle for receiving a button, and having a plurality of guide planes able to guide said button; a button having an arm extending from each side thereof formed to fit with said guide planes; an elastic spring interposed between the button and the seat; a plate spring having an extension and a claw, said claw being coupled with a lower notch cylinder of the umbrella; and said button and said plate spring being arranged to define under normal conditions a clearance between the bottom of said button and the top of said extension of said plate spring; whereby on application of a force in the forward and downward direction against the longitudinal axis of the umbrella, said arms of the button will be moved along said guide planes of said seat and thereafter depress the extension of said plate spring to produce a pivotal rotation therein so as to disengage the retaining claw from said lower notch cylinder.
Claim 2
Dependent Claim
188 words
A locking device for an automatic opening umbrella comprising: a seat housed within a handle of the umbrella, said seat having a recess communicating with an opening formed in said handle for receiving a button, and having a plurality of guide planes able to guide said button; a button having an arm extending from each side thereof formed to fit with said guide planes; an elastic spring interposed between the button and the seat; a plate spring having an extension and a claw, said claw being coupled with a lower notch cylinder of the umbrella; and said button and said plate spring being arranged to define under normal conditions a clearance between the bottom of said button and the top of said extension of said plate spring; whereby on application of a force in the forward and downward direction against the longitudinal axis of the umbrella, said arms of the button will be moved along said guide planes of said seat and thereafter depress the extension of said plate spring to produce a pivotal rotation therein so as to disengage the retaining claw from said lower notch cylinder.
Claim 3
Dependent Claim
24 words
The device as defined in claim 1 in which said guide planes of the seat consist of two horizontal planes and two vertical planes.
Claim 4
Dependent Claim
26 words
A device as defined in claim 1 in which said guide planes of the seat comprise two horizontal planes, two oblique planes and two vertical planes.
Claim 5
Dependent Claim
19 words
A device as defined in claim 1 in which said guide planes include two plain and two oblique planes.
Claim 6
Dependent Claim
20 words
A device as defined in claim 1 in which said two arms of the button are formed in L-like configuration.
Claim 7
Dependent Claim
20 words
A device as defined in claim 1 in which said two arms of the button are formed in plate-like configuration.
Claim 8
Dependent Claim
56 words
The device as defined in claim 1 in which there is no clearance provided between the bottom of the button and the top of the extension of the plate spring and the plate spring is arranged so that the moving distance of said extension is larger than moving distance of said claw of the plate spring.
Claim 9
Dependent Claim
43 words
The device as defined in claim 1 push button is returned automatically to its normal lock position once the force is removed from the push button by the plate spring via its recovering action together with the restoration force of said extension spring.
References Cited (Backward Citations)
US3906970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |