Patent US3531435A successfully refreshed from Google Patents.
Patent US3881739A successfully refreshed from Google Patents.
US3881739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Child{3 s collapsible stroller
Assignee: Unilando SA
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Filing: 1973-08-13
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Granted: 1975-05-06
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Expires: 1993-08-13
Abstract
Abstract A child''s stroller comprises a pair of horizontal side elements pivoted to each other at one of their ends and supported on three wheels, one of which is located at the pivot point, the other two wheels being at the other ends of the side elements; each of the side elements supporting an upright member by means of an articulated connection so that the side elements and upright members can be folded together and the upright members collapsed upon the side elements to reduce the space occupied by the stroller for travelling and storage.
Inventors
- 👤 Pierre Laune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:50
CPC Classifications
B; B62; B62B; B62B7/00; B62B7/04; B62B7/06; B62B7/10; B62B7/08; B62B2205/00; B62B2205/02; B62B2301/00; B62B2301/04; B62B2301/046; B62B2301/0467; B62B5/00; B62B5/04; B62B5/0485; B62B7/044; B62B7/068; B62B9/00; B62B9/20; B62B9/206
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A child''s stroller of the type comprising a frame formed of foldable elements, a support seat made of supple material resting on said frame and a plurality of bearing wheels mounted on said frame, wherein said frame is constituted by a median support plate, rolling means mounted on said support plate two side elements articulated on said support plate, said side elements thus forming a pair of compasses two lateral bearing wheels, each mounted on one end of each of said side elements opposite said support plate a foldable connecting means adapted, when put in active position, to cause said side elements to form a triangular chassis resting on said rolling means and two wheels two lateral uprights, each resting on one side element and being articulated on the respective side element two side arms articulated at one end of the median support plate, the opposite end of each side arm being articulated substantially at the center of a respective upright.
Claim 2
Dependent Claim
161 words
A child''s stroller of the type comprising a frame formed of foldable elements, a support seat made of supple material resting on said frame and a plurality of bearing wheels mounted on said frame, wherein said frame is constituted by a median support plate, rolling means mounted on said support plate two side elements articulated on said support plate, said side elements thus forming a pair of compasses two lateral bearing wheels, each mounted on one end of each of said side elements opposite said support plate a foldable connecting means adapted, when put in active position, to cause said side elements to form a triangular chassis resting on said rolling means and two wheels two lateral uprights, each resting on one side element and being articulated on the respective side element two side arms articulated at one end of the median support plate, the opposite end of each side arm being articulated substantially at the center of a respective upright.
Claim 3
Dependent Claim
47 words
A stroller as claimed in claim 1 wherein said connecting means are formed of two upper and lower cross-pieces, each cross-piece being formed of two substantially equal bars articulated together and pivoted by their end on each of the uprights and thus foldable one against the other.
Claim 4
Dependent Claim
27 words
A stroller as claimed in claim 2, wherein in addition the two cross-pieces are mechanically connected together by means of a vertical rod connecting their central articulation.
Claim 5
Dependent Claim
23 words
A stroller as claimed in claim 2, wherein in addition the uprights are mounted to slide by their base on each side member.
Claim 6
Dependent Claim
34 words
A stroller as claimed in claim 4 further comprising two slidable sleeves, each of them is slidabily mounted on one side member, the lower end of each upright being articulated to the corresponding sleeve.
Claim 7
Dependent Claim
56 words
A stroller as claimed in claim 1 wherein in said support seat is a hammock and has two support means made of supple material connected on the one hand at the upper end of the uprights and on the other hand substantially at the center of said side arms, the hammock resting on said support means.
Claim 8
Dependent Claim
29 words
A stroller as claimed in claim 1, further comprising two foot rests arranged at the lower end of the side elements substantially in the vicinity of the support plate.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |