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United States Patent Application 20030102702
Kind Code A1
Daley, Rick ;   et al. June 5, 2003

Booster seat

Abstract

An adjustable booster-type seat having a base 10 for supporting the seat on a flat surface, a riser 12 mounted for height adjustment on the base, a body support 14 having a seat and back mounted for arcuate motion on the riser 12 for changing the angular position of the body support 14 and being adjustable in height by virtue of the adjustability of the riser on the base. A restraint bar 16 is detachably connected to the body support and in turn adjustably carries a tray 18 enabling the tray to be moved toward and away from the back and to be mounted at different angles with respect to the body support 14.


Inventors: Daley, Rick; (North Scituate, RI) ; Keegan, Charles; (Watertown, MA)
Correspondence Address:
    George L. Greenfield
    Wolf, Greenfield & Sacks, P.C.
    Federal Reserve Plaza
    600 Atlantic Avenue
    Boston
    MA
    02210
    US
Serial No.: 217702
Series Code: 10
Filed: August 13, 2002

Current U.S. Class: 297/250.1; 297/153; 297/256.13
Class at Publication: 297/250.1; 297/256.13; 297/153
International Class: A47D 001/10


Claims



What is claimed is:

1. A booster seat comprising, a base and a riser mounted on the base, a track carried by the riser and a body support mounted on the track enabling said body support to move between an upright and reclined position, a restraint including a post mounted on the body support for retaining a child in the support, and a tray adjustably mounted on the restraint for enabling the tray to be moved toward and away from the body support and for changing the angular relationship of the tray with the body support.

2. A booster seat as defined in claim 1 wherein the body support includes a seat and backrest.

3. A booster seat as defined in claim 2 wherein the body support is a unitized structure that moves as a unit on the riser.

4. A booster seat as defined in claim 2 wherein the backrest is collapsible for reducing the size of the booster for travel and storage.

5. A booster seat as defined in claim 1 wherein the riser may be raised and lowered on the base for raising and lowering the body support with respect to the base.

6. A booster seat comprising, a base assembly and a seat and back mounted on the base assembly, an arcuate support on the base assembly enabling the seat and back to move as a unit between upright, intermediate, and fully reclined positions and to be raised and lowered with respect to the base, and a tray carried by the seat movable toward and away from the back.

7. A booster seat as defined in claim 6 wherein the angular relationship between the tray and seat may be varied.

8. A booster seat as defined in claim 6 wherein the backrest is collapsible for reducing the size of the booster for travel and storage.

9. A booster seat as defined in claim 6 wherein the seat and back have a fixed angular relationship with one another.

10. A booster seat comprising, a base and a riser attached to the base, an adjustment mechanism operatively connecting the riser to the base for raising and lowering the riser on the base, an arcuate track carried by the riser, and a body support movable back and forth on the track for changing the angular orientation of the body support between upright and reclining positions.

11. A booster seat as described in claim 10 wherein the body support has an arcuate surface mating with the track.

12. A booster seat comprising, a base and a support having a pair of arcuate tracks running fore and aft, one on each side of the base, a seat and back assembly having a fixed angular relationship mounted on the tracks for fore and aft and tilting motion to selectively move the assembly between an upright, reclined and intermediate orientations, an adjusting mechanism operatively connected to the base and support for raising and lowering the seat and back assembly with respect to the base, a restraining member attached to the assembly, a tray adjustably supported on the member for back and forth and tilting adjustment enabling the tray to be placed in a substantially horizontal orientation when the seat and backrest assembly is in both the upright and tilted positions, said back having upper and lower portions enabling the upper portion to collapse down on the lower portion to reduce the volume of the booster seat for storage and travel.

13. A booster seat as described in claim 12 wherein the restraining member is detachable from the base.

14. A booster seat comprising a base and a support adjustably mounted on the base for varying the height of the support with respect to the base, a seat and back assembly mounted for tilting motion on the support enabling the assembly to move between upright and reclined positions, and a tray movably mounted on the assembly enabling the tray to be horizontally oriented independent of the position of the assembly.

15. A booster seat comprising, a base and a seat and backrest assembly movably supported by the base for tilting motion thereon between upright and reclined positions, and a tray mounted on the seat and backrest assembly for movement to a horizontal orientation when the assembly is in a reclined position.

16. A booster seat as defined in claim 15 wherein a restraint attached to the seat and backrest assembly supports the tray.

17. A booster seat as defined in claim 16 wherein the tray is adjustably mounted on the restraint for changing the plane of the tray.

18. A booster seat as defined in claim 16 wherein the tray is movable toward and away from the backrest.

19. A booster seat as defined in claim 10 wherein a latching mechanism is operatively connected to the body support and riser for selectively locking the body support in the upright and reclining positions and in at least one intermediate position between the upright and reclining positions.
Description



RELATED APPLICATION

[0001] This application claims the benefits of applicants' earlier filed, copending provisional application Serial No. 60/312,016 filed Aug. 13, 2001 and incorporated herein in its entirety by reference.

INTRODUCTION

[0002] This invention relates to booster-type seats. In accordance with one aspect of the invention, the elevation of the body support may be varied. In accordance with another aspect of the invention, the angular disposition of the body support may be varied. These features enable the seat to accommodate newborns who are fed by a caregiver and toddlers seated at a table. Another aspect of the present invention is the adjustability of the tray with respect to the body support so as to move the tray toward and away from a child in the seat to accommodate the child's size, as well as to change the angular disposition of the tray with respect to the body support so that the tray may be placed in a substantially horizontal position when the body support is in its reclined position. This feature enables a caregiver to place food on the tray while feeding a young child without the food sliding off the tray. Yet another aspect of the present invention is the unitized construction of the seat and backrest that comprise the body support so that the two move together as the body support is adjusted. And yet another aspect of the present invention is the collapsibility of the backrest so as to accommodate storage and transporting of the seat. This is particularly advantageous in seating that has a unitized seat and backrest.

BRIEF FIGURE DESCRIPTION

[0003] FIG. 1 is a side perspective view of a booster seat embodiment disposed on a flat surface in accordance with this invention;

[0004] FIG. 1A is a rear perspective view of the booster seat of FIG. 1;

[0005] FIG. 1B is a side perspective view of the booster seat of FIG. 1 with the tray removed;

[0006] FIG. 2 is a bottom perspective view of the booster seat of FIG. 1;

[0007] FIG. 3 is a rear perspective view of the booster seat with the tray removed and the seat and back in an elevated position as compared to the earlier figures;

[0008] FIG. 4 is a three quarter front perspective view of the booster seat shown in a reclined position;

[0009] FIG. 4A is a fragmentary view of the seat and back assembly and the riser of the booster seat in assembled relationship;

[0010] FIGS. 5A, 5B and 5C are side views of the seat and back assembly and riser with the assembly in the upright, intermediate reclined and a fully reclined positions respectively on the riser;

[0011] FIG. 6 is a bottom perspective view of the base and riser of the booster seat illustrating one embodiment of the latching mechanism for adjusting the height of the riser on the base;

[0012] FIG. 6A is a bottom perspective view of the riser and seat and back assembly showing the slide arrangement for the assembly on the riser;

[0013] FIG. 7 is an exploded perspective view of seat and back assembly, riser and portions of the tilting mechanism and latch for changing the angular position of the assembly on the riser and for raising and lowering the riser on the base;

[0014] FIG. 8 is a rear perspective view of the booster seat with the backrest in the operative position;

[0015] FIG. 9 is a detail perspective view of the tilting mechanism;

[0016] FIG. 10 is a front perspective view of the booster seat with the tray removed showing the mechanism for releasing the tilt mechanism and the holes in the restraint bar for adjusting the position of the tray;

[0017] FIG. 11 is a fragmentary perspective view of the front of the booster seat and showing one method by which the restraint bar may be connected to the seat and back assembly;

[0018] FIG. 12 is a front perspective view of the booster without the tray and the restraint bar detached from the seat and back assembly, and showing the series of holes in the restraint bar that provide adjustment for the tray;

[0019] FIG. 13 is a fragmentary bottom perspective view of the tray, restraint bar and latch for engaging the holes in the bar;

[0020] FIG. 13A is a bottom fragmentary perspective view of the tray and particularly illustrating the one latch for attaching the tray to the assembly;

[0021] FIG. 14 is a side perspective view of the booster seat with the seat and back assembly in the maximum or fully reclined position and the tray in the forward and horizontal position;

[0022] FIG. 15 is a rear quarter perspective view showing toy recesses in the tray;

[0023] FIG. 16 is an exploded perspective view of a toy partially assembled in one toy recess of the tray;

[0024] FIG. 17 is a front perspective view of the assembled toy of FIG. 16 fully mounted in the recess;

[0025] FIG. 18 is an exploded perspective view of another toy partially assembled in one recess of the tray;

[0026] FIG. 19 is a rear perspective view of the booster seat without a tray and with the upper portion of the back in its collapsed position;

[0027] FIG. 20 is a fragmentary perspective view illustrating one embodiment of the attachment of the upper portion to the lower portion of the back; and

[0028] FIGS. 20A and 21 are further detail perspective views of the upper and lower portions of the back and showing one embodiment of the attachment for joining the sections together.

DETAILED DESCRIPTION

[0029] The present invention relates to booster seats and feeding seats (hereinafter collectively called boosters or booster seats) used by babies and toddlers. The booster seat shown in the accompanying drawings includes as its major parts, a base 10, riser 12 and seat and back assembly (sometimes called a body support) 14. The device also includes a restraint bar 16 and tray 18. All of these parts typically may be injection molded of suitable plastic material such as polypropylene. The base 10 serves as a bottom support for the assembly and is particularly designed to be placed on a flat surface orienting the base in a substantially horizontal plane. The riser 12 is essentially permanently connected to the base 10 although its height is adjustable on the base so as to in turn provide an adjustment for the elevation of the seat and back assembly 14. The riser 12 also provides a track-like surface for the seat and back assembly so as to enable the seat to be moved through an arc of perhaps 30.degree. so that the child in it may be seated in an upright position or in a number of different reclined positions. This feature is illustrated in FIGS. 5A-5C. As explained below, the embodiment shown provides a number of different settings for the seat assembly on the riser that allows incremental adjustments in the orientation of the seat and backrest assembly of approximately 5.degree. so that six or seven different angular reclined positions are available. The restraint bar 16 is removably connected to the seat and back assembly 14 and will restrain the baby or toddler in the booster from sliding off the seat and beneath the tray 18. In addition, the restraint bar 16 provides the support for the tray 18 and also provides means for orienting the angular relationship of the tray with respect to the seat and backrest assembly.

[0030] The base 10 is shown in FIGS. 2 and 3 to be generally rectangular in the shape having a front bar 20, side bars 22 and a rear bar 24. The rear bar 24 carries an anti-skid foot 26 to restrain the base from sliding on the surface upon which it rests. The restraint bar may take any number of firms and be attached to some or all of the members that define the frame-like shape. The lower surface of the base 10 defines a uniform supporting plane so that the base will not tip or rock when placed on a flat surface. The bar 10 also includes a pair of upwardly extending generally vertical side walls 30 and a rear generally vertical wall 29 that in this embodiment are telescopically received in cavities 31 in the riser 12. In FIGS. 3 and 4, the riser 12 is shown in its elevated position on the panels 34 and 29 of base 10, while in FIG. 1 the riser is shown in its lowermost position on the base. The height adjustment of the riser on the base is achieved by virtue of three tiers of slots 30 formed on the outside surfaces 32 of the side walls 34 that extend upwardly from the side bars 22 of the base. While preferably three pairs of slots 30 are provided in the walls 34 to provide three adjustments in the height of the riser, obviously, a different number may be employed and the connections may be provided on the inner sides or the ends of the side walls 34. The slots 30 cooperate with the height adjustment mechanisms 40 carried on each side of the riser, to support the riser on the base at the appropriate elevation for the baby or toddler to be seated in the booster. FIG. 6 which is a fragmentary perspective view of the underside of one side of the riser shows a handle 42 that carries a pair of posts 44 that are biased to their extended positions. The posts 44 in accordance with this embodiment in turn carry a pair of tabs 46 that are sized to register with the slots 30. When the tabs 46 are disposed in one of the selected pairs of slots, they rigidly retain the riser in a fixed position on the base. It is to be appreciated that the height adjustment mechanisms are provided on each side of the riser and cooperate with the slots 30 on each wall 34 of the base. In FIG. 6 the cavity 31 is shown in association with the mechanism 40, which cavity receives the side wall 34 of the base. In order to change the position of the riser 12 on the base, the handles 42 on each side of the riser must be pulled outwardly so as to free the tabs 46 from the slots 30. When that is done, the riser may be raised and lowered as desired, and the handles are released when the tabs are aligned with the desired pair of slots 30. While not illustrated, a connection is made between the riser and base that prevents the riser from being removed from the base. The riser is free to be adjusted between the various elevations afforded by the pairs of slots 30, but the connection between the base and riser prevents the riser from being lifted off the base. That mechanism may conveniently be disposed in the arms 50 of the riser and in the walls 34 of the base.

[0031] As shown in FIG. 7 the riser 12 has an arcuate platform 60 that forms a track-like support for the seat and back assembly 14. (In FIG. 7, the top portion of the back has been removed as described more fully below.) The platform 60 directly supports the seat and back assembly 14 for sliding motion between the upright and most reclined position of the assembly (see FIGS. 5A and 5C). When the seat and back assembly 14 is placed on the riser, the arms 62 that are open on the bottom receive the arms 50 of the riser as is evident from an inspection of the rear of the unit as shown for example, in FIG. 8. The rocking motion of the seat and backrest assembly 14 on the riser, as illustrated in FIGS. 5A-5C is controlled by the mechanism 66 shown in FIGS. 4, 7 and 9. That mechanism includes a rack 68 attached to the bottom surface 69 of the seat 70 of assembly 14, and which is engaged by a lever 71 disposed on the front of the riser 12 in a well 72 provided for that purpose. The mechanism is shown in FIGS. 7 and 9. The rack 68 is connected to the bottom of the seat 70, and the lever 71 is shown positioned to selectively engage any segment of the rack. The lever 71 is urged in a raised or operative rack engaging position. In FIG. 7 the lever is shown to carry a rib 73 on its upper surface in position to engage any of the openings 75 in the rack. The lever may be spring biased to that position or be formed to have a natural bias in that direction by its position in the well 72. To slide the back and seat assembly 14 on the riser, the lever 71 must be moved to cause the rib 73 to disengage the rack and preferably when released it automatically re-engages the rack to hold the assembly 14 in a fixed position.

[0032] In FIGS. 5A-5C the upper portion of the backrest 240 of the seat and back assembly 14 is omitted, the lower portion 246 carrying a hinge at the top as described more fully below. In FIG. 5A the seat and back assembly 14 is shown in the most upright position and in FIGS. 5B and 5C the assembly is shown displaced in an intermediate reclined position and a maximum reclined position approximately 15.degree. and 30.degree. respectively from the upright position. As suggested above, additional positions may be set at 5.degree., 10.degree., 20.degree. and 25.degree. from the upright position. All of the positions are established by the rack 68 and lever 70, and the seat and back 14 assembly is releasably locked in each. By moving the lever 70 out of engagement with rack 68, the assembly 14 may be moved to any of the positions established by the rack. Tabs 80 is carried on the bottom of seat and back assembly 14 and extends through slots 81 in the riser to retain the assembly on the riser (see FIG. 6A). Note the extreme positions of the tab 80 in FIGS. 5A and 5C. While a preferred arrangement is shown in FIGS. 6, 6A and 7 for attaching the seat and back assembly to the riser so as to permit the tilt adjustment and locking of the assembly, other arrangements may also be used including tracks, rollers and roller brakes and swing-type linkages, both used in motion furniture.

[0033] FIGS. 10-12 illustrate a preferred embodiment for attaching the restraint bar 16 to the seat 70. The restraint bar locks to the seat and back assembly 14 but may be removed when not in use. The restraint bar 16 includes a crotch post 100 that carries on its lower end, a locking plate 102 (see FIG. 11) that is sized to fit within a T-shaped opening 104 in the seat. When inserted in the opening 104 and thereafter moved rearwardly with respect to the seat so that the side edges 106 of the plate pass beneath the flanges 108, the crotch post 100 will be locked in position. As shown in FIG. 10, the crotch post extends downwardly from and is connected to the front rail 110 of the restraint bar 16. The restraint bar also includes a pair of side panels 112 connected to the ends of the front rail 110. The rear ends of the side panels 112 bear against the uprights 124 at the back of the arms 62 of the seat assembly 14 and include tongues 126 (see FIG. 12) that fit into the slots 118 to releasably hold the panels 112 of the restraint bar in place. Similar tongues 127 and grooves 128 are on the front bottom edge of the panels 112 and front of the arms 62 of the seat and back assembly 14. The lower edge 120 of each panel 112 rests on the upper surfaces 122 of the arms 62. Thus, the restraint bar 16 is held firmly on the seat. To free the restraint bar 16 from the seat, the restraint bar must be moved forward slightly to align the retaining plate 102 on the bottom of the crotch post 100 with the opening 104 so that its side edges 106 are freed from beneath the flanges 108, and the restraining bar may be lifted from the front end by grasping the front rail 110 so as to free the tabs 126 and 127 from the slots 118 and 128. This arrangement is also clearly shown in FIG. 12. In that figure the tongues 126 and 127 are shown freed from the slots 118 and 128, and the retaining plate 102 is shown freed from the T-shaped opening 104 in the seat. While a preferred embodiment for attaching the restraint bar is illustrated, other types of fasteners may be used to join the bar to the seat and back assembly.

[0034] In FIGS. 10 and 12, a series of tray locating holes are shown provided in the outer sides of panels 112 of the restraint bar 16. (The holes are visible only in one arm in those figures.) In the embodiment shown, six such holes are provided in each side panel, identified as 130A through 130F. The holes 130B through 130F are shown aligned along the top edge 132 of the panels, and the hole 130A is shown disposed below the plane defined by the centers of the holes 130B through F. The holes allow the angular orientation of the tray 18 with respect to the seat 70 to be varied and also allow the tray to be moved toward and away from the backrest 240 of the seat and back assembly 14.

[0035] The tray 18 as shown in FIGS. 1, 4, 13-15 and 17 includes a flat central table surface 140 and a surrounding lip 142 that will assist in retaining items placed on the surface 140. On each side 144 of the tray, a latch mechanism 146 is disposed inside the lip 142 and pivotally supported on axles 148 (one shown in FIG. 13) mounted in openings 150 provided in the flanges 152 on the tray bottom. The pivotally supported tray latch mechanism 146 in the illustrated embodiment includes a pair of pegs 147 on its inboard side 154 (see FIG. 13A) that are spaced apart to register with selected pairs of holes 130A through 130F on the sides of the restraint bar 16. The pegs are spaced apart the same distance as the space between the holes 130A and 130B, and that spacing is the same as the spacing between pairs 130B and 130D, 130C and 130E and 130D and 130F. Thus, in the rearwardmost position of the tray on the restraint bar 16, the pegs 147 engage the holes 130D and 130F but the tray may be incrementally moved away from the backrest (further forward with respect to the seat) by engaging pairs of holes 130C and 130E or 130B and 130D. In any of those three alternative positions, the tray will be at the same angular relationship with the seat and backrest assembly 14 but will simply be closer to or further away from the baby or toddler seated in the seat 70. When the pegs register with the holes 130A and 130B, the tray will assume a different angular relationship with respect to the seat and back assembly 14, that is, as shown in FIG. 14. The tray ordinarily will only be mounted in the holes 130A and 130B when the seat and back assembly is in the most rearwardly inclined orientation as in FIGS. 5C and 14. Because in the embodiment shown the seat and backrest assembly 14 is able to tilt approximately 30.degree. rearwardly from its upright position, the different angular orientation for the tray with respect to the seat and back assembly is highly desirable as in that position the tray is more substantially horizontal. That orientation of the seat and back assembly 14 and the tray 18 is ordinarily used for deeding or otherwise attending newborns, and the tray may be utilized by the attendant to carry the food or other items, and they will not slide off the tray. The other positions of the tray ordinarily are used when the seat and back assembly is in the more upright positions. For example, in FIGS. 1 and 4 where the seat is upright and partially reclined, the tray is shown connected in its rearwardmost position utilizing holes 130D and 130F. While in the illustrated embodiment the holes for mounting the tray are provided in the restraint bar, it should be appreciated that the holes may, as an alternative, be provided in the arms 62 of the seat 70. In that arrangement the configuration of the arms and/or the rim 142 of the tray may require reconfiguration to enable the connection between the arms and tray to be made. As yet another modification, the tray may be carried by the crotch post 100 and a tilt mechanism may be provided to enable the plane of the tray to be varied.

[0036] When the booster seat is used by a toddler seated at a table, the restraint bar and tray are not ordinarily used and rather are detached from the body support so that the booster is configured as shown in FIG. 3.

[0037] It should also be appreciated that in other embodiments the connecting mechanism 146 may take other forms. For example, snap type latches, or rack type connectors (such as used to lock the seat and back assembly on the riser) may be employed for that purpose.

[0038] In FIG. 15, the tray is shown to include a pair of toy wells 170 at its rear corners 172. The wells 170 are designed to receive a variety of different toys, two of which are shown in FIGS. 16-18. In FIG. 17 one toy 171 is shown fully in each assembled well. Each variety of toy is retained in its well 170 by means of a top housing 174 that may be transparent, translucent or opaque depending on the nature of the toy. A bottom housing 176 fits within well 170, and the two housing sections 174 and 176 together form a generally egg-shaped chamber 181. In the embodiment of toy shown in FIG. 16, a rib 178 divides the chamber into two sections, 180 and 182. Chamber section 182 is defined in part by additional ribs 184, 186 and 187, and a bellows assembly 188 is sized to be supported on the ribs. The bellows in turn is exposed through the opening 190 in the top housing 174. A generally heart-shaped crown 192 also provided in the top housing 174 closes section 180, and a ball 194 is retained in but free to move about within it. In FIG. 16 a passage 196 is shown formed in the rib 178 so as to place the chamber sections 182 and 180 in communication with one another. When the bellows is compressed, pressure in the chamber section 182 causes air to flow through the passage 196 into the chamber section 180. The air flow through the small opening 196 causes the ball 194 to roll about in its chamber section and entertains the baby or toddler seated in the booster assuming, of course, that the top housing 174 is transparent or translucent.

[0039] The top housing 174 is provided with a clip 198 designed to engage the lower edges 201 of the flanges 200 on the side of the tray to releasably retain the top housing in place. The flexibility of the material of the top housing enables the clip to slide over the flanges and engage their lower edges. Alternatively, the clip may be hinged to the upper portion of the top housing body and latch onto the bottom of the flanges 200 or the bottom edge 201.

[0040] The toy shown in FIG. 18 differs from that shown in FIG. 16 simply by the fact that the ball 194 is replaced by a spinner 209. The spinner is mounted for rotation on the top of a post 210 in the well section 180 and carries ribs 212 on its bottom surface that are in the path of air discharged through opening 196. It should be understood that the material from which the heart shaped crown 192 is formed in the top housing is translucent or transparent so that the child or baby in the booster can see the motion of the ball or spinner. It should also be appreciated that the spinner and ball may be decorated with a variety of colors or other ornamental indicia that would appeal to and attract the attention of the child or baby.

[0041] In FIGS. 19, 20, and 21 the backrest 240 of the seat and back assembly 14 is shown to be foldable so as to reduce the overall size of the booster, particularly for purposes of packaging, travel or storage. The backrest is shown in FIG. 17 to be in the erect position, while in FIG. 19 the top portion 242 of the backrest is folded back so as to hang downwardly from the hinges 244 connecting the top portion with the lower portion 246 of the backrest 240. The hinges 244 on each side of the backrest enable the top portion 242 to fold backward in the manner shown in FIG. 19. However, a lock is provided so as to maintain the upper portion 242 of the backrest in the operative position of FIG. 17. In FIG. 20 the lower edge 248 of the upper portion 242 is shown to carry a locking tab 250 with a lip 252. The tab 250 when the backrest is in the operative position of FIG. 17 extends through a slot 254 in the top edge 256 of the lower portion 246 of the backrest to retain the upper portion in the operative position. To release the locking tab 250 one must engage the tab 250 from the back of the booster and pull the tab rearwardly to unhook the lip 252 from the edge of the slot 254.

[0042] As shown in FIGS. 20 and 21, the hinges 244 include mating hubs 260 and 262 connected to the lower and upper portions 244 and 242 of the backrest 240. The hubs 260 on the sides of the backrest each carry a pin 264 that extends into a vertical track (not shown) in the hub 262. The pins 264 and tracks allow the upper portion of the backrest to be vertically raised to remove the locking tabs 250 from the slot 254 and the box-shaped feet 270 on the lower edge 248 of the upper portion from the recesses 272 on the top side 256 of the lower portion 246 of the backrest. Once they are disengaged, the upper portion 242 can be pivoted on the hinges 244 to the folded position of FIG. 19. While in the embodiment shown the hinges 244 are disposed on the side edges of the bottom and top portions 242 and 246 of the backrest, in other embodiments the hinges may be provided intermediate the side edges, and different types of latches may also be utilized to hold the backrest in its operative configuration, such as snap-type flanges utilized to hold the restraint bar on the arms of the seat.

[0043] From the foregoing description it will be appreciated that numerous other modifications may be made of the illustrated embodiment without departing from the spirit and scope of the invention. Therefore, it is not intended that the scope of the invention be limited to the embodiments illustrated and described. Rather, its scope is to be determined by the claims and their equivalents.

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