US3887228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable wheelchair and kit therefor
Assignee: Individual
•
Filing: 1973-11-28
•
Granted: 1975-06-03
•
Expires: 1993-11-28
Abstract
Abstract A foldable chair of a light-weight construction having a seat, a back, and front and rear leg structures and foldable between a use position and a storage position, includes a pair of casters mounted in spaced-apart relationship to the front leg structure for partially and rollably supporting the chair over a supporting surface, a pair of wheels mounted in spaced-apart relationship to the rear leg structure for partially and rollably supporting the chair over the supporting surface, and at least one elongated strut element extending between the front leg structure and the rear leg structure, the strut element being connected swingably at one of its end portions to the associated leg structure and being movably connected at its opposite end portion to its associated leg structure so that the strut element may be swung between a substantially horizontal use position and a storage position. The foldable chair further includes a pair of large ambulatory wheels journaled for rotation on an axle connected to the rear leg structure, a foldable footrest connected to the front leg structure, and a package carrier support extending horizontally between the front and rear leg structures.
Inventors
- 👤 Philip E Ingerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:04
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/08; A61G5/0808; A61G5/0833; A61G5/10; A61G5/1083; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
An assembly according to claim 1, wherein one of said first and second members includes a hook for limiting downward motion of said first and second members substantially below a horizontal position when the chair is in its use position.
Claim 2
Dependent Claim
55 words
An assembly according to claim 2, further including large ambulatory wheels positioned near the seat, and an elongated axle assembly mounted on the undercarriage assembly for rotatably supporting said large wheels on opposite sides of the seat, said axle assembly being adjustable in size longitudinally to position adjustably said ambulatory wheels at different spaced-apart positions.
Claim 3
Dependent Claim
70 words
An assembly according to claim 3, wherein said axle assembly includes a split tube, and a pair of axially aligned outer tubes for telescopically receiving said split tube, said ambulatory wheels and said tubes being composed of metal, said ambulatory wheels being journaled for rotation on said outer tubes, a pair of magnets positioned on the outer ends of said outer tubes for attracting said wheels to said outer tubes.
Claim 4
Dependent Claim
73 words
An assembly according to claim 2, wherein each one of the front and rear leg structures is U-shaped, a rear pair of generally flattened, hollow cup-shaped corner brackets connected to the first-mentioned wheels for fitting over and receiving the rear corners of the rear leg structures, a front pair of generally flattened, hollow cup-shaped corner brackets connected to said casters for fitting over and receiving the front corners of the front leg structure.
Claim 5
Dependent Claim
186 words
A kit adapted to be attached to a foldable chair of the type having a lightweight frame with interwoven flexible webs secured thereto to form a seat, a back, and a U-shaped front leg structure and a U-shaped rear leg structure and foldable between a use position and a storage position, comprises: a rear pair of generally flattened, hollow cup-shaped corner brackets adapted to fit over and to receive the corners of the rear U-shaped leg structures and adapted to be secured in place thereon; a pair of wheels connected to the rear pair of brackets for partially and rollably supporting the chair over the supporting surface; a front pair of generally flattened, hollow cup-shaped corner brackets adapted to fit over and to receive the corners of the front U-shaped leg structure and adapted to be secured in place thereon; a pair of casters connected to the front pair of brackets for partially and rollably supporting the chair over a supporting surface; and at least one elongated strut element connected between one of said rear pair of brackets and one of said front pair of brackets.
Claim 6
Dependent Claim
186 words
A kit adapted to be attached to a foldable chair of the type having a lightweight frame with interwoven flexible webs secured thereto to form a seat, a back, and a U-shaped front leg structure and a U-shaped rear leg structure and foldable between a use position and a storage position, comprises: a rear pair of generally flattened, hollow cup-shaped corner brackets adapted to fit over and to receive the corners of the rear U-shaped leg structures and adapted to be secured in place thereon; a pair of wheels connected to the rear pair of brackets for partially and rollably supporting the chair over the supporting surface; a front pair of generally flattened, hollow cup-shaped corner brackets adapted to fit over and to receive the corners of the front U-shaped leg structure and adapted to be secured in place thereon; a pair of casters connected to the front pair of brackets for partially and rollably supporting the chair over a supporting surface; and at least one elongated strut element connected between one of said rear pair of brackets and one of said front pair of brackets.
Claim 7
Dependent Claim
50 words
A kit according to claim 6, wherein said strut element comprises pivotally interconnected first and second members, each one of said first and second members including a pair of rods, and means for adjustably connecting together said rods end-to-end so that the overall length of said rods can be adjusted.
Claim 8
Dependent Claim
60 words
A kit according to claim 6, further including large ambulatory wheels positioned near the seat, and an elongated axle assembly, adapted to be mounted on said rear pair of brackets for rotatably supporting said large wheels on opposite sides of the seat, said axle assembly being adjustable in size longitudinally to position adjustably said ambulatory wheels at different spaced-apart positions.
References Cited (Backward Citations)
US102253A
Cited
US865541A
Cited
US1470151A
Cited
US2818910A
Cited
US2961250A
Cited
US3114572A
Cited
US3802524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |