US3738378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Umbrella tent
Assignee: Individual
•
Filing: 1971-07-19
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Granted: 1973-06-12
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Expires: 1991-07-19
Abstract
Abstract A tent having a foldable frame provided with flexible legs which are bowed outwardly, when the frame is fully unfolded into a mutually supporting relationship with an enclosing canvas cover. A mechanical drive is provided in the frame for tensioning the legs and the canvas cover, the drive providing a positive lock against accidental collapse of the tent.
Inventors
- 👤 W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:58
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
An umbrella tent comprising an enclosure of foldable material having a floor and a substantially dome-shaped cover, a foldable frame within the enclosure and having a plurality of flexible legs circumferentially spaced around the cover, a first spider pivotally connecting the upper ends of the flexible legs, each of the flexible legs having upper and lower sections hingedly connected together, a radial spreader pivotally connected at one end to each upper section, a second spider pivotally connecting the inner ends of the radial spreaders, a threaded rod journalled in the second spider and projecting vertically therethrough, a nut mounted on the threaded rod, and having a laterally projecting pin, a tube non-rotatably secured at the upper end thereof to the first spider, said tube having a socket and a lower end slot providing access thereto, said pin on the nut entering the socket to releasably couple said nut to the tube, and an operating crank secured to a lower end of the threaded rod below the second spider.
Claim 2
Dependent Claim
168 words
An umbrella tent comprising an enclosure of foldable material having a floor and a substantially dome-shaped cover, a foldable frame within the enclosure and having a plurality of flexible legs circumferentially spaced around the cover, a first spider pivotally connecting the upper ends of the flexible legs, each of the flexible legs having upper and lower sections hingedly connected together, a radial spreader pivotally connected at one end to each upper section, a second spider pivotally connecting the inner ends of the radial spreaders, a threaded rod journalled in the second spider and projecting vertically therethrough, a nut mounted on the threaded rod, and having a laterally projecting pin, a tube non-rotatably secured at the upper end thereof to the first spider, said tube having a socket and a lower end slot providing access thereto, said pin on the nut entering the socket to releasably couple said nut to the tube, and an operating crank secured to a lower end of the threaded rod below the second spider.
Claim 3
Dependent Claim
164 words
An umbrella tent comprising an enclosure of foldable material having a substantially dome-shaped cover, a foldable frame supporting the enclosure and having a plurality of flexible legs, said flexible legs each being formed of upper and lower sections, hinge means connecting adjacent ends of the upper and lower sections, a first spider pivotally connecting the upper ends of the flexible legs, a spreader pivotally connected at one end to each upper section, a second spider below the first spider and pivotally connecting the inner ends of the spreaders, tensioning means operatively connecting the first and second spiders and being manually operable to vary the spacing between said spiders, said tensioning means comprising a threaded rod journalled in the second spider, a nut on the threaded rod, a tube secured at the upper end thereof to the first spider and releasably secured at the opposite end to the nut, and an operating crank on a lower end of the threaded rod below the second spider.
Claim 4
Dependent Claim
164 words
An umbrella tent comprising an enclosure of foldable material having a substantially dome-shaped cover, a foldable frame supporting the enclosure and having a plurality of flexible legs, said flexible legs each being formed of upper and lower sections, hinge means connecting adjacent ends of the upper and lower sections, a first spider pivotally connecting the upper ends of the flexible legs, a spreader pivotally connected at one end to each upper section, a second spider below the first spider and pivotally connecting the inner ends of the spreaders, tensioning means operatively connecting the first and second spiders and being manually operable to vary the spacing between said spiders, said tensioning means comprising a threaded rod journalled in the second spider, a nut on the threaded rod, a tube secured at the upper end thereof to the first spider and releasably secured at the opposite end to the nut, and an operating crank on a lower end of the threaded rod below the second spider.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |