Patent US3716211A successfully refreshed from Google Patents.
US3716211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable stand
Assignee: Individual
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Filing: 1971-02-11
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Granted: 1973-02-13
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Expires: 1991-02-11
Abstract
Abstract A foldable stand having a head member and at least three legs pivotally connected to the head member so that the legs can be spread from each other in a position of use and adjacent to each other for a position of non-use. The head member has a central rotary member secured to and depending therefrom and a plurality of blade springs are provided secured to each leg at one end and the other end pressing in contact with the head member.
Inventors
- 👤 J Butz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:01
CPC Classifications
A; A47; A47B; A47B97/00; A47B97/04; F; F16; F16M; F16M11/00; F16M11/20; F16M11/24; F16M11/242; F16M11/245
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
A foldable stand comprising a head member, at least three legs pivotally connected to said head member to permit said legs to be spread from each other into a position of use and adjacent to each other into a position of non-use, a central member secured to said head member and depending therefrom, said central member having a two adjacent conical surfaces along the length thereof, the first of said surfaces converging downwardly and the second of said surfaces converging upwardly, and a blade spring secured at one end to each of said legs with the other end of each said spring being bent away from said central member, a portion of each said spring adjacent said bent end having a profile which is curved toward its associated leg, each said spring so arranged that its bent end presses against said first conical surface when said legs are in a position of use thereby serving to hold said legs spread apart, and each said spring being also arranged that a portion of its curved profile presses against said second surface when said legs are in a position of non-use thereby serving to hold said legs adjacent one another.
Claim 2
Dependent Claim
198 words
A foldable stand comprising a head member, at least three legs pivotally connected to said head member to permit said legs to be spread from each other into a position of use and adjacent to each other into a position of non-use, a central member secured to said head member and depending therefrom, said central member having a two adjacent conical surfaces along the length thereof, the first of said surfaces converging downwardly and the second of said surfaces converging upwardly, and a blade spring secured at one end to each of said legs with the other end of each said spring being bent away from said central member, a portion of each said spring adjacent said bent end having a profile which is curved toward its associated leg, each said spring so arranged that its bent end presses against said first conical surface when said legs are in a position of use thereby serving to hold said legs spread apart, and each said spring being also arranged that a portion of its curved profile presses against said second surface when said legs are in a position of non-use thereby serving to hold said legs adjacent one another.
Claim 3
Dependent Claim
198 words
A foldable stand comprising a head member, at least three legs pivotally connected to said head member to permit said legs to be spread from each other into a position of use and adjacent to each other into a position of non-use, a central member secured to said head member and depending therefrom, said central member having a two adjacent conical surfaces along the length thereof, the first of said surfaces converging downwardly and the second of said surfaces converging upwardly, and a blade spring secured at one end to each of said legs with the other end of each said spring being bent away from said central member, a portion of each said spring adjacent said bent end having a profile which is curved toward its associated leg, each said spring so arranged that its bent end presses against said first conical surface when said legs are in a position of use thereby serving to hold said legs spread apart, and each said spring being also arranged that a portion of its curved profile presses against said second surface when said legs are in a position of non-use thereby serving to hold said legs adjacent one another.
Claim 4
Dependent Claim
198 words
A foldable stand comprising a head member, at least three legs pivotally connected to said head member to permit said legs to be spread from each other into a position of use and adjacent to each other into a position of non-use, a central member secured to said head member and depending therefrom, said central member having a two adjacent conical surfaces along the length thereof, the first of said surfaces converging downwardly and the second of said surfaces converging upwardly, and a blade spring secured at one end to each of said legs with the other end of each said spring being bent away from said central member, a portion of each said spring adjacent said bent end having a profile which is curved toward its associated leg, each said spring so arranged that its bent end presses against said first conical surface when said legs are in a position of use thereby serving to hold said legs spread apart, and each said spring being also arranged that a portion of its curved profile presses against said second surface when said legs are in a position of non-use thereby serving to hold said legs adjacent one another.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |