Patent US3716067A successfully refreshed from Google Patents.
US3716067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Invalid support
Assignee: Individual
•
Filing: 1971-04-20
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Granted: 1973-02-13
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Expires: 1991-04-20
Abstract
Abstract A foldable three-legged invalid support having a pair of Ushaped side frames, the forward legs of the side frames being pivotally interconnected to form a V and the connection having a yieldable frictional resistance which permits controlled adjustment of the spacing of the frames to the comfort of the user and stabilizes the structure.
Inventors
- 👤 F Skoog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:56
CPC Classifications
A; A61; A61H; A61H3/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
An invalid supporting device comprising a pair of side frames having front and rear end, means hingedly interconnecting the front ends of said frames for pivotal movement between a closed storage position and an open invalid-accommodating V-shaped position, and said interconnecting means comprising means frictionally resisting pivotal movement of the frames and means yieldably accommodating shifting of said frames and serving to resist pivotal movement between the frames during use.
Claim 2
Dependent Claim
70 words
An invalid supporting device comprising a pair of side frames having front and rear end, means hingedly interconnecting the front ends of said frames for pivotal movement between a closed storage position and an open invalid-accommodating V-shaped position, and said interconnecting means comprising means frictionally resisting pivotal movement of the frames and means yieldably accommodating shifting of said frames and serving to resist pivotal movement between the frames during use.
Claim 3
Dependent Claim
70 words
An invalid supporting device comprising a pair of side frames having front and rear end, means hingedly interconnecting the front ends of said frames for pivotal movement between a closed storage position and an open invalid-accommodating V-shaped position, and said interconnecting means comprising means frictionally resisting pivotal movement of the frames and means yieldably accommodating shifting of said frames and serving to resist pivotal movement between the frames during use.
Claim 4
Dependent Claim
70 words
An invalid supporting device comprising a pair of side frames having front and rear end, means hingedly interconnecting the front ends of said frames for pivotal movement between a closed storage position and an open invalid-accommodating V-shaped position, and said interconnecting means comprising means frictionally resisting pivotal movement of the frames and means yieldably accommodating shifting of said frames and serving to resist pivotal movement between the frames during use.
Claim 5
Dependent Claim
35 words
The invention according to claim 1 and said frames having front and rear legs and the front leg of one of the frames having a short leg and said frames providing three ground engaging legs.
Claim 6
Dependent Claim
60 words
The invention according to claim 1 and said interconnecting means comprising a pair of vertically displaced hinge elements and said yieldable means comprising a yieldable body of elastomer material interposed between said hinge elements and adapted to be compressed therebetween attendant to relative vertical displacement of the side frames, and said material disposed in shear to resist said pivotal movement.
Claim 7
Dependent Claim
75 words
The invention according to claim 3 and one of the frames comprising a single ground-engaging leg and the other frame comprising a pair of ground-engaging legs and said frame with the said single leg having a cantilever support on the other frame via said interconnecting means whereby upon load being applied to said one frame said body of elastomer material is deflected through the hinge element connected to the one frame and overlying said body.
Claim 8
Dependent Claim
26 words
The invention according to claim 4 and each side frame is of inverted U-shaped and having an upper hand-hold and said frames providing adjustable ground-engaging legs.
Claim 9
Dependent Claim
24 words
The inventIon according to claim 3 and said interconnecting means comprising friction means formed and arranged to resist pivotal movement of said side frames.
Claim 10
Dependent Claim
39 words
The invention according to claim 1 and said interconnecting means comprising a pair of hinge elements and said yieldable means comprising an intervening body of elastomer material adapted to be compressed therebetween attendant to relative shifting of the frames.
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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 |