A compact collapsible stroller includes a mobile base provided with front and rear wheels. A push handle is coupled to the mobile base.
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1. A collapsible stroller comprising a mobile base including a rolling rear-leg unit having a rear wheel and a rolling front-leg unit having a front wheel and being mounted for folding movement relative to the rolling rear-leg unit between a folded position alongside the rolling rear-leg unit and as
1. A collapsible stroller comprising a mobile base including a rolling rear-leg unit having a rear wheel and a rolling front-leg unit having a front wheel and being mounted for folding movement relative to the rolling rear-leg unit between a folded position alongside the rolling rear-leg unit and associated with a collapsed storage mode of the stroller wherein the front and rear wheels are arranged to lie in close proximity to one another to define a first distance therebetween and an unfolded position separated from the rolling rear-leg unit associated with an expanded use mode of the stroller wherein the front and rear wheels are arranged to lie in spread-apart relation to one another to define a greater second distance therebetween,a juvenile seat mounted for movement with the mobile base, anda foot-actuated base opener includinga spreader mover including a first foot pedal anda leg spreader coupled to the rolling rear-leg unit at a rear pivot axis, the rolling front-leg unit at a front pivot axis, and the spreader mover for movement relative to each of the rolling rear-leg and front-leg units between a drawn-together leg position associated with the collapsed storage mode of the stroller and a spread-apart leg position associated with the expanded use mode of the stroller,wherein the spreader mover further includes pedal-support means for effecting a torque to move the rear and front wheels about the rear and front axes from the drawn-together leg position to the spread-apart leg position to unfold the rolling front-leg unit of the mobile base and move the front wheel of the rolling front-leg unit away from the rear wheel of the rolling rear-leg unit in response to application of a downward force to the first foot pedal so that the rolling front-leg unit is moved from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit. 2. The collapsible stroller of claim 1, wherein the leg spreader includes a leg driver arranged to move relative to each of the rolling front-leg and rear-leg units during change of the stroller from the collapsed storage mode to the expanded use mode and pivot means for pivotably coupling the leg driver to each of the rolling front-leg unit, rolling rear-leg unit, and the pedal-support means to cause the rolling front-leg unit to pivot about an axis relative to the leg driver to move from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit in response to application of the downward force to the first foot pedal included in the spreader mover. 3. The collapsible stroller of claim 2, wherein the pedal-support means is arranged to locate the first foot pedal below the juvenile seat and the pivot means and above ground underlying the front and rear wheels upon movement of the rolling front-leg unit to the unfolded position. 4. A collapsible stroller comprising a mobile base including a rolling rear-leg unit having a rear wheel and a rolling front-leg unit having a front wheel and being mounted for folding movement relative to the rolling rear-leg unit between a folded position alongside the rolling rear-leg unit and associated with a collapsed storage mode of the stroller wherein the front and rear wheels are arranged to lie in close proximity to one another to define a first distance therebetween and an unfolded position separated from the rolling rear-leg unit associated with an expanded use mode of the stroller wherein the front and rear wheels are arranged to lie in spread-apart relation to one another to define a greater second distance therebetween,a juvenile seat mounted for movement with the mobile base, anda foot-actuated base opener includinga spreader mover including a first foot pedal anda leg spreader coupled to the rolling rear-leg unit, the rolling front-leg unit, and the spreader mover for movement relative to each of the rolling rear-leg and front-leg units between a drawn-together leg position associated with the collapsed storage mode of the stroller and a spread-apart leg position associated with the expanded use mode of the stroller,wherein the spreader mover further includes pedal-support means for moving the leg spreader relative to the rear and front wheels from the drawn-together leg position to the spread-apart leg position to unfold the rolling front-leg unit of the mobile base and move the front wheel of the rolling front-leg unit away from the rear wheel of the rolling rear-leg unit in response to application of a downward force to the first foot pedal so that the rolling front-leg unit is moved from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit,wherein the leg spreader includes a leg driver arranged to move relative to each of the rolling front-leg and rear-leg units during change of the stroller from the collapsed storage mode to the expanded use mode and pivot means for pivotably coupling the leg driver to each of the rolling front-leg unit, rolling rear-leg unit, and the pedal-support means to cause the rolling front-leg unit to pivot about an axis relative to the leg driver to move from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit in response to application of the downward force to the first foot pedal included in the spreader mover, andwherein the spreader mover further includes spring means for yieldably urging the pedal-support means to move relative to the leg driver from an extended position separated from the rolling rear-leg unit and arranged to define an included angle therebetween of greater than 20° to a retracted position arranged to lie alongside the rolling rear-leg unit until a downward force in excess of a predetermined amount is applied to the first foot pedal to cause the pedal-support means to pivot about an axis and move away from the rolling rear-leg unit. 5. A collapsible stroller comprising a mobile base including a rolling rear-leg unit having a rear wheel and a rolling front-leg unit having a front wheel and being mounted for folding movement relative to the rolling rear-leg unit between a folded position alongside the rolling rear-leg unit and associated with a collapsed storage mode of the stroller wherein the front and rear wheels are arranged to lie in close proximity to one another to define a first distance therebetween and an unfolded position separated from the rolling rear-leg unit associated with an expanded use mode of the stroller wherein the front and rear wheels are arranged to lie in spread-apart relation to one another to define a greater second distance therebetween,a juvenile seat mounted for movement with the mobile base, anda foot-actuated base opener includinga spreader mover including a first foot pedal anda leg spreader coupled to the rolling rear-leg unit, the rolling front-leg unit, and the spreader mover for movement relative to each of the rolling rear-leg and front-leg units between a drawn-together leg position associated with the collapsed storage mode of the stroller and a spread-apart leg position associated with the expanded use mode of the stroller,wherein the spreader mover further includes pedal-support means for moving the leg spreader relative to the rear and front wheels from the drawn-together leg position to the spread-apart leg position to unfold the rolling front-leg unit of the mobile base and move the front wheel of the rolling front-leg unit away from the rear wheel of the rolling rear-leg unit in response to application of a downward force to the first foot pedal so that the rolling front-leg unit is moved from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit, andwherein the leg spreader includes a leg driver arranged to move relative to each of the rolling front-leg and rear-leg units during change of the stroller from the collapsed storage mode to the expanded use mode and pivotably coupled to each of the rolling front-leg unit, rolling rear-leg unit, and pedal-support means to cause the rolling front-leg unit to pivot about an axis relative to the leg driver from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit in response to application of the downward force to the first foot pedal. 6. A collapsible stroller comprising a mobile base including a rolling rear-leg unit having a rear wheel and a rolling front-leg unit having a front wheel and being mounted for folding movement relative to the rolling rear-leg unit between a folded position alongside the rolling rear-leg unit and associated with a collapsed storage mode of the stroller wherein the front and rear wheels are arranged to lie in close proximity to one another to define a first distance therebetween and an unfolded position separated from the rolling rear-leg unit associated with an expanded use mode of the stroller wherein the front and rear wheels are arranged to lie in spread-apart relation to one another to define a greater second distance therebetween,a juvenile seat mounted for movement with the mobile base, anda foot-actuated base opener includinga spreader mover including a first foot pedal anda leg spreader coupled to the rolling rear-leg unit, the rolling front-leg unit, and the spreader mover for movement relative to each of the rolling rear-leg and front-leg units between a drawn-together leg position associated with the collapsed storage mode of the stroller and a spread-apart leg position associated with the expanded use mode of the stroller,wherein the spreader mover further includes pedal-support means for moving the leg spreader relative to the rear and front wheels from the drawn-together leg position to the spread-apart leg position to unfold the rolling front-leg unit of the mobile base and move the front wheel of the rolling front-leg unit away from the rear wheel of the rolling rear-leg unit in response to application of a downward force to the first foot pedal so that the rolling front-leg unit is moved from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit, andwherein the leg spreader includes a leg driver arranged to move relative to each of the rolling front-leg and rear-leg units during change of the stroller from the collapsed storage mode to the expanded use mode and pivot means for pivotably coupling the leg driver to each of the rolling front-leg unit, rolling rear-leg unit, and the pedal-support means to cause the rolling front-leg unit to pivot about an axis relative to the leg driver to move from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit in response to application of the downward force to the first foot pedal included in the spreader mover. 7. A collapsible stroller comprising a mobile base including a rolling rear-leg unit having a rear wheel and a rolling front-leg unit having a front wheel and being mounted for folding movement relative to the rolling rear-leg unit between a folded position alongside the rolling rear-leg unit and associated with a collapsed storage mode of the stroller wherein the front and rear wheels are arranged to lie in close proximity to one another to define a first distance therebetween and an unfolded position separated from the rolling rear-leg unit associated with an expanded use mode of the stroller wherein the front and rear wheels are arranged to lie in spread-apart relation to one another to define a greater second distance therebetween,a juvenile seat mounted for movement with the mobile base, anda foot-actuated base opener includinga spreader mover including a first foot pedal anda leg spreader coupled to the rolling rear-leg unit, the rolling front-leg unit, and the spreader mover for movement relative to each of the rolling rear-leg and front-leg units between a drawn-together leg position associated with the collapsed storage mode of the stroller and a spread-apart leg position associated with the expanded use mode of the stroller,wherein the spreader mover further includes pedal-support means for moving the leg spreader relative to the rear and front wheels from the drawn-together leg position to the spread-apart leg position to unfold the rolling front-leg unit of the mobile base and move the front wheel of the rolling front-leg unit away from the rear wheel of the rolling rear-leg unit in response to application of a downward force to the first foot pedal so that the rolling front-leg unit is moved from the folded position alongside the rolling rear-leg unit to the unfolded position separated from the rolling rear-leg unit, andwherein the leg driver is pivotably coupled to the rolling rear-leg unit for pivotable movement about a rear pivot axis, the leg driver is pivotably coupled to the rolling front-leg unit for pivotable movement about a front pivot axis that is arranged to lie in laterally spaced-apart relation to the rear pivot axis, and the leg driver is pivotably coupled to the pedal-support means for pivotable movement about a middle pivot axis. 8. The collapsible stroller of claim 7, wherein the rolling front-leg unit is arranged to pivot about the front pivot axis in a clockwise direction away from the folded position located alongside the rolling rear-leg unit to the unfolded position associated with the expanded use mode of the stroller and the rolling rear-leg unit is arranged to pivot about the rear pivot axis in a counterclockwise direction in response to downward movement of the first foot pedal toward ground underlying the front and rear wheels. 9. The collapsible stroller of claim 8, further comprising a pedal-return spring coupled to the leg driver and the pedal-support means and arranged to apply a torque to the pedal-support means to urge the first foot pedal normally and yieldably to assume a ready-to-use retracted position alongside the rolling rear-leg unit when the stroller is in the expanded use mode. 10. A collapsible stroller comprising a mobile base including a rolling rear-leg unit and a rolling front-leg unit arranged to move relative to the rolling rear-leg unit from a folded position located alongside the rolling rear-leg unit and associated with a collapsed storage mode of the collapsible stroller to an unfolded position located apart from the rolling rear-leg unit and associated with an expanded use mode of the collapsible stroller, anda foot-actuated base opener formed to provide means for effecting a torque to move the rolling front-leg unit about a front axis away from the rolling rear-leg unit from the folded position to the unfolded position to unfold the mobile base in response to application of a downward force to a foot pedal included in the foot-actuator base opener to move the foot pedal closer to ground underlying the mobile base so that the collapsible stroller changes from the collapsed storage mode to the expanded use mode. 11. A collapsible stroller comprising a mobile base including a rolling rear-leg unit and a rolling front-leg unit arranged to move relative to the rolling rear-leg unit from a folded position located alongside the rolling rear-leg unit and associated with a collapsed storage mode of the collapsible stroller to an unfolded position located apart from the rolling rear-leg unit and associated with an expanded use mode of the collapsible stroller, anda foot-actuated base opener formed to provide means for moving the rolling front-leg unit away from the rolling rear-leg unit from the folded position to the unfolded position to unfold the mobile base in response to application of a downward force to a foot pedal included in the foot-actuator base opener to move the foot pedal closer to ground underlying the mobile base so that the collapsible stroller changes from the collapsed storage mode to the expanded use mode, andwherein the mobile base further includes a leg spreader arranged to extend between the rolling front-leg and rear-leg units and coupled to the foot-actuated base opener, the rolling front-leg unit is coupled to the leg spreader for pivotable movement about a front leg-pivot axis, and the rolling rear-leg unit is coupled to the leg spreader for pivotable movement about a rear-leg pivot axis that is arranged to lie in spaced-apart relation to the leg-pivot axis associated with the rolling front-leg unit. 12. The collapsible stroller of claim 11, wherein the foot-actuated base opener includes a pedal support having a lower portion coupled to the foot pedal and an upper portion pivotably coupled to the leg spreader. 13. The collapsible stroller of claim 12, wherein the foot-actuated base opener further includes a pedal-return spring coupled to the leg spreader and to the pedal support and configured to provide torsion means for yieldably applying a torque to the pedal support to pivot the pedal support about a pivot axis to a ready-to-use retracted position alongside the rolling rear-leg unit so that the foot pedal is arranged to receive a downward force to move the foot pedal closer to the ground and cause the mobile base to unfold.
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