Land vehicles – Wheeled – Extensible
Patent
1983-11-30
1985-10-01
Peters, Jr., Joseph F.
Land vehicles
Wheeled
Extensible
280647, 280658, 297DIG4, B62B 708
Patent
active
045441782
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a collapsible push chair and, more specifically, to a push chair which can not only be changed from an erected condition to a collapsed condition, but one that has reversible handle shafts which, when the push chair is in its erected condition, can be arranged so that a baby carried in the push chair faces the person pushing the push chair or faces away from the person pushing the push chair, in the same direction as this person.
BACKGROUND ART
It is known to provide push chairs in which two transversely connected side frames each comprise first and second legs respectively provided with adjacent first ends and with second ends; pivot means providing articulation between the adjacent first ends of the first and second legs; and a handle shaft.
However, to reverse the handle shafts so as to push the push chair in the opposite direction, it is normally necessary to remove the handle shafts and to reconnect them to the remainder of the push chair, in a different position. In any case, reversing the handle shafts requires means additional to those provided for erecting and collapsing the push chair.
DISCLOSURE OF THE INVENTION
It is an object of the invention to provide a collapsible push chair in which means provided for folding the push chair between its erected and collapsed conditions are so constructed as to accommodate reversal of the handle shafts.
This is achieved by ensuring that the handle shaft of each side frame is pivotally connected to the pivot means of the side frame for movement between a first position, in which the handle shaft extends away from the first leg, and a third position, laterally adjacent the first leg, respectively on opposite sides of a second position in which the handle shaft extends away from the second leg; locking means are provided for releasably locking the handle shaft in said first and second positions; drive means interconnect the handle shaft and at least one of the first and second legs for relative movement of the first and second legs so that when the handle shaft is in said third position the first leg is laterally adjacent the second leg; and lost motion means permit movement of the handle shaft from the first position to the second position without movement of the first leg relative to the second leg.
It is therefore possible to pivotally move the handle shafts of the two side frames selectively to their first or second positions, for pushing the push chair from behind or from in front of a collapsible seat assembly supported by and interconnecting the two side frame. Moreover, the pivotal movement can be extended so as to move the handle shafts from their second positions to their third positions to effect collapse of the side frames and the collapsible seat assembly. This facilitates the folding of the collapsible push chair. Similarly, unfolding of the push chair into its erected condition is effected by movement of the handle shafts from their third positions to their first positions. The handle shafts can then be moved between their first and second positions without collapsing the push chair.
In one convenient form of construction, the drive means of each side frame interconnect the handle shaft and the second leg for pivotal movement of the second leg towards and into lateral proximity with the first leg as the handle shaft is pivotally moved from said second position to said third position.
Thus, in a preferred embodiment, the pivot means of each side frame comprise a hub at the first end of the first leg and first and second pivot pins supported by said hub; the handle shaft is pivotally mounted on the first pivot pin; the second leg is pivotally mounted on the second pivot pin; the drive means comprise a first gear sector pivotally mounted on the first pivot pin and a second gear sector, which is co-operable with the first gear sector, at the first end of the second leg; and the lost motion means comprise an arcuate slot formed in the first gear sector and a driving pin extending from the handle s
REFERENCES:
patent: 3847406 (1974-11-01), Burnham
patent: 4058341 (1977-11-01), Prins
patent: 4191397 (1980-03-01), Kassai
patent: 4398748 (1983-08-01), Duvignacq
patent: 4412688 (1983-11-01), Giordani
Al-Sheikh Abdelraouf M.
Avci Sakir T.
Kelso Kenneth S.
Kwek Seng H.
McBean Lionel B.
Andrews MacLaren Limited
McCarthy Joseph G.
Peters Jr. Joseph F.
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