Foldable Wheeled Carrier Including Wheel Folding Actuation Handle

Abstract

A wheeled carrier device such as a baby stroller, golf cart, child carrier, or general carrier or cargo cart, comprising a bottom frame with at least two rear wheels and at least one front wheel, and may include a movably mounted upper carrier frame with a selectively removable, adjustable and/or reversible carrying element which may include child seating, with a unique wheel folding mechanism that interconnects all the wheels, so that simple movement of a wheel folding grasp synchronously moves all the wheels between the operative, rolling position and their stowed fold flat positions parallel with the bottom frame, with the wheel folding mechanism operable independently of collapsing movement of an optional upper carrier frame which also folds flat and parallel with the bottom frame.

Claims

1. A foldable wheeled carrier device comprising a bottom frame forming a perimeter and a side elevational profile, at least two rear wheels and at least one front wheel movably mounted to the bottom frame, each wheel including a central axis of rotation, and having an operative and stowed position, an upper carrier frame movably mounted to the bottom frame including a carrying element, and a wheel folding mechanism interconnected to each of the wheels which synchronously moves the at least two rear wheels and the at least one front wheel between the operative and stowed positions, comprising a movable push-pull grasp separate from the carrier bottom frame and the wheels, the grasp is movable towards and away from the bottom frame, and in a first, operative position, each of the rear wheels and the at least one front wheel are orthogonal to the bottom frame providing rolling support, and in a second, stowed position each rear wheel and the at least one front wheel are swept through an angle positioning each wheel parallel with, and closely adjacent to the bottom frame underside, positioning each wheel's axis of rotation within the perimeter and side elevational profile of the bottom cart frame.

2. A device in accordance with claim 1 wherein the upper carrier frame carrying element, in a first, operative position, forms at least one children's seat that accommodates at least one child, and in a second, stowed position the carrying element and the upper carrier frame is collapsed, substantially parallel with the bottom frame.

3. A device in accordance with claim 1 wherein the upper carrier frame carrying element in a first, operative position retains cargo.

4. A device in accordance with claim 1 wherein the at least two rear wheels and the at least one front wheel, occupy a common plane when in the second, stowed position.

5. A device in accordance with claim 1 wherein the upper carrier frame carrying element is movable from an operative carrier frame carrying position, to a collapsed, stowed upper carrier frame position, independently of actuation of the wheel folding mechanism.

6. A device in accordance with claim 1 wherein the wheel folding mechanism interconnected components between the grasp and the rear wheels include a series of tie rods at least partly housed within the bottom frame perimeter, transmitting synchronous motion between the handle grasp movement and the at least two rear wheels respectively, moving the rear wheels between the operative and stowed positions.

7. A device in accordance with claim 1, wherein the wheel folding mechanism comprises sleeve elements interconnected to the at least two rear wheels, the sleeve elements having guide rails with sliding elements connected to tie rods, transmitting synchronous motion between the grasp movement and the at least two rear wheels respectively, particularly causing the movement of the rear wheels between their operative and stowed positions.

8. A device in accordance with claim 1, wherein at least one foot element mounted along a portion of the rear of the bottom frame, retains the bottom frame of the device in an upright position vertical in relation to a rolling surface.

9. A device in accordance with claim 1, wherein the wheel folding mechanism grasp is mounted on a transverse rod extending substantially perpendicular to the direction of the push-pull motion.

10. A device in accordance with claim 1, wherein the wheel folding mechanism comprises an intermediary member arranged between the grasp and the at least one front wheel, the intermediary member including a guide rail for guiding a slider connected to the grasp which synchronously moves the at least one front wheel between the operative and stowed positions.

11. A device in accordance with claim 1 wherein, in the second stowed position, the at least two rear wheels each occupy a common plane, and provide a second, rolling support position to the substantially vertically oriented folded and stowed wheeled carrier device.

12. A foldable wheeled carrier device comprising a bottom frame including a least two substantially parallel side portions with a front and rear, joined at least near to the front by at least one transverse connector portion, forming a bottom frame periphery, and a side elevational profile, at least a pair of rear wheels, each of the pair mounted near the rear of the bottom frame side portions, and at least one front wheel movably mounted to the bottom frame front transverse connector portion, each wheel including a central axis of rotation and having an operative and stowed position, an upper carrier portion movably mounted to the bottom frame including a carrying element, and a wheel folding mechanism interconnected to each of the wheels which synchronously moves the at least two rear wheels and the at least one front wheel between the operative and stowed positions, comprising a manually movable grasp separate from the carrier bottom frame and the wheels, mounted along the front transverse connector, and in a first, operative position, each of the rear wheels and the at least one front wheel are orthogonal to the bottom frame providing rolling support, and in a second, stowed position each rear wheel and the at least one front wheel are swept through an angle positioning each wheel parallel with, and closely adjacent to the bottom frame, positioning each wheel's axis of rotation within the periphery and the side elevational profile of the bottom cart frame.

13. A device in accordance with claim 12 wherein the grasp motion is a push-pull motion linearly in relation to the front transverse connector.

14. A device in accordance with claim 12 wherein the upper carrier portion carrying element is movable from an operative carrier portion carrying position, to a collapsed, stowed upper carrier portion position, independently of actuation of the wheel folding mechanism.

15. A device in accordance with claim 12, wherein the upper carrier portion carrying element forms child seating which is selectively removable from the upper carrier portion, and in a first, operative child retaining position the carrying element is mounted to the upper carrier portion and upwardly positioned in relation to the bottom carrier frame, and in a second, removed position the child seating carrying element is detached from the upper carrying portion and includes manual carrying means.

16. A device in accordance with claim 12, wherein the upper carrier portion carrying element includes a collapsed, stowed position in which the carrying element is mounted to the upper carrier portion, positioned parallel with, and closely adjacent to the bottom frame, forming a combined side elevational profile with the bottom cart frame.

17. A device in accordance with claim 12, wherein the carrying element is manually removable from the upper carrier portion, selectively reversible 180 degrees in relation to the front and rear of the bottom frame, and may be manually reconnected to the upper carrier portion, thereby providing for at least two selectable child carrying orientations of the carrying element when connected to the upper carrier portion.

18. A foldable wheeled carrier device comprising a bottom frame including a least two substantially parallel side portions with a front and rear, joined at least near to the front and rear by transverse connector portions, forming a bottom frame perimeter and a side elevational profile, at least a pair of rear wheels, each of the pair mounted near the rear of the bottom frame side portions, and at least one front wheel movably mounted to the bottom frame front transverse connector portion, each wheel including a central axis of rotation, and an operative and stowed position, and a wheel folding mechanism interconnected to each of the wheels which synchronously moves the at least two rear wheels and the at least one front wheel between the operative and stowed positions, comprising a manually movable grasp separate from the carrier bottom frame and the wheels, the movable grasp is mounted along the front transverse connector, and in a first, operative position, each of the rear wheels and the at least one front wheel are orthogonal to the bottom frame providing rolling support, and in a second, stowed position each rear wheel and the at least one front wheel are swept through an angle positioning each wheel parallel with, and closely adjacent to the bottom frame, with each wheel's axis of rotation within the perimeter and the side elevational profile of the bottom cart frame.

19. A device in accordance with claim 18, wherein a collapsible upper carrier portion is movably mounted to the bottom frame and includes a carrying element, and in a first, operative position is upwardly positioned in relation to the bottom frame, and in a second, stowed position is stowed substantially parallel with, and adjacent to, the bottom carrier frame.

20. A device in accordance with claim 18, wherein the wheeled carrier device, in the first, operative position, retains cargo.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Preferred embodiments of the invention are further explained with respect to the drawings, without limiting the invention thereto. In the drawings:

[0022] FIG. 1 is a perspective view of a baby stroller according to the invention, having a bottom frame with front and back wheels, an upper carrier frame and a child seat carrying element mounted to the upper carrier frame; FIG. 1 together with FIG. 7 are the preferred cover figures;

[0023] FIG. 2 is a perspective view of the baby stroller of FIG. 1, yet without the carrying element child seat;

[0024] FIG. 3 is a perspective view of the baby stroller of FIGS. 1, 2 during collapsing of the carrier;

[0025] FIG. 4 is a perspective view of the baby stroller of FIGS. 1 to 3 in the collapsed position of the carrier bottom and upper frames;

[0026] FIG. 5 is a perspective view of a further baby stroller according to the invention in an upright position supported by foot elements mounted on the bottom frame;

[0027] FIG. 6 is a perspective view of the baby stroller of FIG. 5 with the front wheels pivoted by 90 into an intermediary position for preparation of the folding of the front wheels;

[0028] FIG. 7 is a perspective view of the baby stroller of FIGS. 5, 6 with the front wheels and the back wheels folded into a flat stow position below the bottom frame, forming a carrier frame perimeter and a fully folded side elevational profile of the device;

[0029] FIGS. 8a to 8d are perspective views of the folding mechanism for folding the rear and front wheels;

[0030] FIG. 9 is an exploded view of the wheel folding mechanism of FIGS. 8a to 8d;

[0031] FIGS. 10a to 10c are detail views of elements of the wheel folding mechanism of FIGS. 8 and 9; and

[0032] FIGS. 11a to 11c are sectional views of elements of the wheel folding mechanism of FIGS. 8 to 10.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] FIGS. 1 to 7 show a manually operable wheeled carrier device, wagon or cart 1, which, in the shown embodiment, is a baby stroller embodiment. With certain modifications readily comprehensible to the person skilled in the art, carrier or cart 1 could also be a golf cart, game or cargo carrier, child carrier or the like. The words carrier and cart may be used interchangeably and synonymously throughout this application.

[0034] As can be seen from FIGS. 1 and 2, cart 1 comprises a bottom frame 2. Two back wheels 3 and two front wheels 4 are mounted to the bottom frame 2. Cart 1 could also only have one front wheel 4. A carrier frame 5 is mounted to the bottom frame 2. A carrier element, in the present embodiment a child seat 6, is releasably attached to carrier frame 5. FIG. 1 shows cart 1 with attached child seat 6. In FIG. 2, child seat 6 was detached from child seat mounts 7. In the shown drive position of cart 1 supported on the ground, front wheels 2 may pivot about a vertical axis for steering cart 1, as is known in the prior art.

[0035] As can be seen from FIGS. 1 and 2, the bottom frame 2 comprises two lateral (side) frame members 8 and two transverse frame members 9 connecting the two lateral frame members 8. In the shown drive position, lateral frame members 8 and transverse frame members 9 are arranged in a horizontal plane parallel to the ground on which back wheels 3 and front wheels 4 are supported. The upper carrier frame 5 in one embodiment comprises a circumferential frame element 10 and two support frame elements 11, the two support frame elements 11 supporting the circumferential frame element 10 from the underside thereof.

[0036] As can be seen from FIGS. 3 and 4, cart 1 comprises a collapsing mechanism 12, which is arranged for transferring the upper carrier frame 5 from a carrying position (see FIGS. 1 and 2) into a collapsed position (see FIG. 4) through a series of partly collapsed positions (see FIG. 3). The collapsing mechanism 12 comprises a first hinge 13 between a first 14 and a second frame part 15 of the circumferential frame element 10. The collapsing mechanism 12 further comprises a second hinge 16 between a first 17 and a second portion 18 of each support frame element 11. The circumferential frame element 10 and the support frame elements 11 are arranged essentially in parallel to a main plane of the bottom frame in the collapsed position of the carrier frame 5.

[0037] As can be seen from FIGS. 5 to 7, in greater detail from FIGS. 8 to 11, cart 1 further comprises a folding mechanism 19 for folding the two back wheels 3 and the two front wheels 4 simultaneously from the operative or drive position shown in FIGS. 1 to 4 into a stow position shown in FIG. 7. Folding mechanism or device 19 comprises an operating handle 20 separate from the upper carrier frame 5 such that the two back wheels 3 and the two front wheels 4 may be folded into the stow position independently of the collapsing mechanism 12 for bringing the (upper) carrier frame 5 into the collapsed position. The operating handle 20 is arranged at a front end of the bottom frame 2, between two front wheels 4.

[0038] According to FIG. 5, cart 1 is arranged in an upright position, in which front wheels 4 and back wheels 3 are lifted off a level ground. For supporting cart 1 in the upright position, two foot elements 21 are arranged on the rear transverse frame member g, The foot elements 21 may be extensions of lateral frame members 8. In this position, front wheels 4 and back wheels 3 may be arranged in parallel to each other.

[0039] According to FIG. 6, front wheels 4 may be pivoted into an intermediate folding position about an axis essentially perpendicular to the bottom frame 2 (i.e. a vertical axis with respect to the drive position on the ground as shown in FIGS. 1, 2). In the intermediate folding position, front wheels 4 are arranged essentially perpendicularly to back wheels 3.

[0040] According to FIG. 7, front wheels 4 are pivoted about transverse axes perpendicular to the longitudinal axis of cart 1 by approximately goo. At the same time, back wheels 3 are pivoted about axes essentially parallel to the longitudinal axis of cart 1 by approximately goo. In this way, front wheels 4 and back wheels 3 are arranged in the stow position shown in FIG. 7, in which front wheels 4 and back wheels 31ie flat at the underside of bottom frame 2.

[0041] As can be seen from FIGS. 8 to 11, the wheel operating handle 20 is a push-and-pull handle being linearly movable along the main horizontal plane of the bottom frame 2. The folding mechanism 1g comprises a force transmitting device 22 housed inside the bottom frame 2. In the shown embodiment, force transmitting device 22 comprises one tie rod 23 in each lateral frame member 8 of bottom frame 2. The tie rods 23 are multi-part in the shown embodiment. The opposite ends of tie rods 23 are connected to the operating handle 20 and back wheels 3, respectively. The folding mechanism 1g further comprises one sleeve element 24 around each lateral frame member 8. The sleeve elements 24 are connected to back wheels 3. Each sleeve element 24 has a guide rail 25 with sections inclined to the direction of the linear movement of tie rods 23. Sliding elements 31 are rigidly connected to ends of tie rods 23 and slide along first guide rails 25 of sleeve elements 24. In this way, an actuation of the wheel operating handle 20 is transferred into the swiveling or pivoting motion of the two back wheels 3 into the stow position.

[0042] As can be seen from FIGS. 8 to 11, the push-and-pull wheel operating handle 20 is mounted on a transverse rod 26 extending perpendicularly to the direction of the pushing or pulling of the push-and-pull operating handle 20. The folding mechanism 19 further comprises an intermediary member 27 arranged between the operating handle 20 and the front wheel 4 (see FIGS. 8a to 8d). The intermediary member 27 has a second guide rail 28 which accommodates a slider formed by transverse rod 26. In this way, an actuation of the operating handle 20 is transferred into a swiveling or pivoting motion of the front wheel 4 into the stow position.

[0043] As can be seen particularly from FIGS. 8a to 8d, the push-and-pull operating handle 20 comprises a grasp or handhold member 29 and a mounting member 30 mounted on the transverse rod 26 of bottom frame 2. The handhold member 29 is pivotably mounted on the mounting element 30.

[0044] It is appreciated that any alternative embodiment components may be mixed and matched within the spirit of the invention, and that the upper carrier frame may be entirely eliminated, using the bottom carrier frame alone for a wide array of cargo carrying uses, and that the upper carrier frame may be used for golf, game or other miscellaneous types of cargo retaining activities, besides for baby stroller uses.