Patent US3920258A successfully refreshed from Google Patents.
US3920258A
Expired / Lapsed
US
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Transportation cart
Assignee: RIGULAG AND CO AB KB Co
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Filing: 1973-09-24
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Granted: 1975-11-18
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Expires: 1993-09-24
Abstract
Abstract Transportation cart having side walls pivotally mounted for swinging motion toward and away from each other from a position in which they are parallel to each other, so that two or more carts can be inserted in each other so as to occupy so little storage space as possible.
Inventors
- 👤 Rickard Verner Lundstrom
- 👤 Curt Lennart Lagerstrom
- 👤 Gunnar Savas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:41
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/14; B62B3/18; B62B3/184; B62B3/186
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A transportation cart having two vertical side walls which, when in operative position, are parallel to each other and swingable toward and away from each other, along one edge thereof, and a third wall, each side wall being rigidly connected to one half of the third wall, said halves of said third wallbeing hingedly connected along the edge opposite to the edge which is connected to said side walls, said cart having wheel means for transportation of said cart, means for providing a bottom swingably mounted on one of said vertical side walls, each of said wheel means being mounted in a corner at the underside of said walls, each side wall carrying one of said wheel means at the furthest moving corner, and means for locking said swingable side walls in cooperative relation with said bottom when the latter is in its horizontal position, said said cart being insertable in a like cart for storage when the cart is in an upright position with the bottom in a vertical position.
Claim 2
Dependent Claim
171 words
A transportation cart having two vertical side walls which, when in operative position, are parallel to each other and swingable toward and away from each other, along one edge thereof, and a third wall, each side wall being rigidly connected to one half of the third wall, said halves of said third wallbeing hingedly connected along the edge opposite to the edge which is connected to said side walls, said cart having wheel means for transportation of said cart, means for providing a bottom swingably mounted on one of said vertical side walls, each of said wheel means being mounted in a corner at the underside of said walls, each side wall carrying one of said wheel means at the furthest moving corner, and means for locking said swingable side walls in cooperative relation with said bottom when the latter is in its horizontal position, said said cart being insertable in a like cart for storage when the cart is in an upright position with the bottom in a vertical position.
Claim 3
Dependent Claim
30 words
A transportation cart as claimed in claim 1, wherein the side walls are provided with locking means which engage each other when the side walls are swung toward one another.
Claim 4
Dependent Claim
30 words
A transportation cart as claimed in claim 2, wherein the locking means is a claw-like portion arranged in one side wall and a pin-like portion in the other side wall.
Claim 5
Dependent Claim
23 words
A transportation cart as claimed in claim 1, wherein all of the transport wheels of the cart are disposed at the side walls.
Claim 6
Dependent Claim
38 words
A transportation cart as claimed in claim 1, wherein the cart has a bottom which is vertically raisable into engagement with one of the side walls and which in lowered position interlocks the side walls in parallel relationship.
Claim 7
Dependent Claim
58 words
A transportation cart as claimed in claim 1, wherein an additional wall is pivoted to one of the side walls in such a way that at the insertion of the transportation cart in a similar cart said additional wall is swung into parallel relationship with, or into the plane of, the side wall to which it is pivoted.
References Cited (Backward Citations)
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US3420379A
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US3552761A
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US3810648A
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Cited
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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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |