US4032173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheeled carriers
Assignee: Individual
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Filing: 1975-10-03
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Granted: 1977-06-28
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Expires: 1995-10-03
Abstract
Abstract A wheeled carrier such as a stroller comprising a frame having a base provided with wheels and a collapsible support movable between an erected position wherein it extends upwardly from the base and a collapsed position wherein it lies generally flat on the base, and a collapsible seat which is supported by a part of the support movable between an erected position to position the seat for use when the support is erected and a collapsed position to collapse the seat when the support is collapsed. The invention provides locking means such as toggle mechanisms connected between parts of the support and operable to lock the support in the erected position by movement of the seat-supporting part downwardly towards its erected position and releasable to permit collapsing of the support by movement of the seat-supporting part upwardly towards its collapsed position. The support comprises frame members pivotally connected together and to the base. The base comprises two spaced members having pivotally mounted thereon two independent collapsible wheel-carrying structures, and the base members are held in fixed spaced-apart relation by the frame members pivotally connected thereto.
Inventors
- 👤 John Dennis Clegg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:48
CPC Classifications
B; B62; B62B; B62B7/00; B62B7/04; B62B7/06; B62B7/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
378 words
In a wheeled carrier of the kind comprising a frame which has a base provided with ground-engaging wheels and a collapsible support which is mounted on the base and is movable between an erected position wherein it extends upwardly from the base and a collapsed position wherein it lies generally flat on the base, a collapsible seat for a child which is supported by a part of the support movable between an erected position to position the seat for use when the support is erected and a collapsed position to collapse the seat when the support is collapsed, and locking means connected between parts of the support for releasably locking the support in the erected position, the improvement wherein the seat-supporting part of the support is operatively connected to the locking means to operate the locking means to lock the support in the erected position on movement of the seat-supporting part towards its erected position and to release the locking means to permit collapsing of the support on movement of the seat-supporting part towards its collapsed position, and the support comprises a first part which is connected to the base for pivoting relative thereto about a first horizontal axis, a second part which is connected to the upper end of the first part for pivoting relative thereto about a second horizontal axis parallel to said first horizontal axis, and a third part which is connected to the base for pivoting relative thereto about a third horizontal axis spaced from and parallel to said first horizontal axis, the second part having a portion which extends downwardly from its pivotal connection to the upper end of the first part and which is connected to the upper end of the third part for pivoting relative thereto about a fourth horizontal axis spaced from and parallel to said second horizontal axis, whereby the three parts of the support are movable between an erected position in which the first and second parts lie generally in a common plane disposed at an inclination to the horizontal and the first and third parts together form a structure of triangular form from which the second part extends upwardly, and a collapsed position in which the three parts are folded generally flat on top of the base.
Claim 2
Dependent Claim
378 words
In a wheeled carrier of the kind comprising a frame which has a base provided with ground-engaging wheels and a collapsible support which is mounted on the base and is movable between an erected position wherein it extends upwardly from the base and a collapsed position wherein it lies generally flat on the base, a collapsible seat for a child which is supported by a part of the support movable between an erected position to position the seat for use when the support is erected and a collapsed position to collapse the seat when the support is collapsed, and locking means connected between parts of the support for releasably locking the support in the erected position, the improvement wherein the seat-supporting part of the support is operatively connected to the locking means to operate the locking means to lock the support in the erected position on movement of the seat-supporting part towards its erected position and to release the locking means to permit collapsing of the support on movement of the seat-supporting part towards its collapsed position, and the support comprises a first part which is connected to the base for pivoting relative thereto about a first horizontal axis, a second part which is connected to the upper end of the first part for pivoting relative thereto about a second horizontal axis parallel to said first horizontal axis, and a third part which is connected to the base for pivoting relative thereto about a third horizontal axis spaced from and parallel to said first horizontal axis, the second part having a portion which extends downwardly from its pivotal connection to the upper end of the first part and which is connected to the upper end of the third part for pivoting relative thereto about a fourth horizontal axis spaced from and parallel to said second horizontal axis, whereby the three parts of the support are movable between an erected position in which the first and second parts lie generally in a common plane disposed at an inclination to the horizontal and the first and third parts together form a structure of triangular form from which the second part extends upwardly, and a collapsed position in which the three parts are folded generally flat on top of the base.
Claim 3
Dependent Claim
153 words
A wheeled carrier as claimed in claim 1 wherein the locking means comprise at least one toggle mechanism connected between the upper end of the third part and the upper end portion of the first part at a location spaced downwardly from the pivotal connection of the second part thereto, the seat-supporting part being operatively connected to the toggle mechanism to move it between an operative position to lock the support in the erected position and a released position to permit collapsing of the support, and the toggle mechanism being arranged, when moved to its operative position, to draw the upper end of the third part and hence the said downwardly extending portion of the second part towards the upper end portion of the first part and, when in its operative position, to lock together the said downwardly extending portion of the second part and the upper end portion of the first part.
Claim 4
Dependent Claim
150 words
A wheeled carrier as claimed in claim 2 wherein the seat-supporting part is connected to the upper end of the third part for pivoting relative thereto about a horizontal axis parallel to said fourth horizontal axis, and the toggle mechanism comprises a link which is pivotally connected at its respective ends to the upper end portion of the first part at said location spaced downwardly from the pivotal connection of the second part thereto and to the seat-supporting part at a location spaced from its pivotal connection to the third part, and that portion of the seat-supporting part between its pivotal connection to the upper end of the third part and the pivotal connection of the link thereto, the seat-supporting part being pivotable relative to the third part through an over-center position relative to the pivotal connection of the link to the first part because its erected and collapsed positions.
Claim 5
Dependent Claim
63 words
A wheeled carrier as claimed in claim 3 wherein the seat-supporting part comprises a U-shaped member the free ends of which are pivotally connected to the upper end of the third part at opposite sides of the carrier and each of which has an associated toggle mechanism, whereby the two mechanisms are operable and releasable in unison by movement of the seat-supporting part.
Claim 6
Dependent Claim
67 words
A wheeled carrier as claimed in claim 1 wherein the base comprises two spaced members carrying the ground-engaging wheels and the first and third parts of the support comprise two frame members pivotally connected to the base members so that their axes of pivoting relative thereto extend transversely with respect to the base members, the frame members acting to maintain the base members in fixed spaced-apart relation.
Claim 7
Dependent Claim
86 words
A wheeled carrier as claimed in claim 5 wherein the two frame members constituting the first and third parts of the support are each constituted by a U-shaped member, the two limbs of which are pivotally connected to the respective base members at opposed locations adjacent to the cross part of the member, and the second part of the support comprises a member of inverted U-shape the limbs of which are pivotally connected to the respective limbs of each of the first and third frame members.
Claim 8
Dependent Claim
113 words
A wheeled carrier as claimed in claim 5 wherein each base member has pivotally mounted thereon a structure carrying two wheels, the structure being pivotable relative to the base member about a horizontal axis perpendicular to said first and third horizontal axes between an operative position in which the wheels are positioned for engagement with the ground and a collapsed position in which the structure and the wheels lie generally flat against the base and the collapsed support, the third part of the support being arranged on erection and collapsing of the support to exert a camming action on the two wheel structures to move them to the operative and collapsed positions respectively.
Claim 9
Dependent Claim
82 words
A wheeled carrier as claimed in claim 7 wherein each wheel structure comprises two members generally of inverted U-shape which are arranged side-by-side and one of which is pivotally connected to the associated base member, the free ends of one of said two members having integral lateral extensions which are attached to the respective free ends of the other member and form axles for the two wheels of the structure, and cross members being provided between the two members above the wheels.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |