U.S. patent application number 11/567081 was filed with the patent office on 2007-05-03 for high chair.
This patent application is currently assigned to Graco Children's Products Inc.. Invention is credited to William B. Bellows, Myles Christensen, Robert E. Haut, James Murray Forbes Hutchinson, Michael L. Longenecker, Paul Nelson, Patrick Nolan.
Application Number | 20070096528 11/567081 |
Document ID | / |
Family ID | 33101284 |
Filed Date | 2007-05-03 |
United States Patent
Application |
20070096528 |
Kind Code |
A1 |
Nolan; Patrick ; et
al. |
May 3, 2007 |
High Chair
Abstract
A high chair features various modes of adjustability and
enhanced utility. The height of the chair can be adjusted using a
single hand that engages a rear handle. The height of a seat
platform of the chair can be adjusted separately relative to the
tray. The tray itself is ergonomically designed for the benefit of
the caregiver. A removable tray liner facilitates after-meal
clean-up. Wheels on the underside of the tray ease fore/aft
adjustment. A pivoting back rest of the chair minimizes rearward
shift of the center of gravity of the occupied chair, thus
requiring a smaller chair footprint. Further, an accessory bar
pivoted to a seat back portion of the chair provides readily
accessible entertainment.
Inventors: |
Nolan; Patrick; (Royersford,
PA) ; Hutchinson; James Murray Forbes; (Mohnton,
PA) ; Bellows; William B.; (Wyomissing, PA) ;
Longenecker; Michael L.; (Ephrata, PA) ; Haut; Robert
E.; (West Chester, PA) ; Christensen; Myles;
(Pueblo West, CO) ; Nelson; Paul; (Elverson,
PA) |
Correspondence
Address: |
LEMPIA FORMAN LLC
223 W. JACKSON BLVD.
SUITE 620
CHICAGO
IL
60606
US
|
Assignee: |
Graco Children's Products
Inc.
Exton
PA
|
Family ID: |
33101284 |
Appl. No.: |
11/567081 |
Filed: |
December 5, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
10803086 |
Mar 18, 2004 |
|
|
|
11567081 |
Dec 5, 2006 |
|
|
|
60457325 |
Mar 26, 2003 |
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Current U.S.
Class: |
297/363 ;
297/337 |
Current CPC
Class: |
A47D 1/002 20130101;
A47D 1/0081 20170501; A47D 1/0085 20170501; A47D 1/004 20130101;
A47D 1/00 20130101 |
Class at
Publication: |
297/363 ;
297/337 |
International
Class: |
A47D 1/00 20060101
A47D001/00 |
Claims
1. An adjustable child high chair seat comprising: a seat bottom
portion; a seat back portion pivotally mounted relative to the seat
bottom portion about a pivot axis to move between a first angular
position relative to the seat bottom portion and a second angular
position relative to the seat bottom portion, wherein the second
angular position is angularly offset with respect to the first
angular position, the seat back portion defining a lower edge
disposed proximal to the seat bottom portion; a first axis defined
by an intersection of the lower edge of the seat back portion and
the seat bottom portion when the seat back is in a first angular
position; and a second axis defined by an intersection of the lower
edge of the seat back portion and the seat bottom portion when the
seat back is in a second angular position angularly offset from the
first angular position, such that the second axis is spaced from
the first axis, wherein the pivot axis is located above and
forwardly of the first and second axes.
2. The adjustable child high chair seat, wherein the first angular
position is a fully upright seat back position and the second
angular position is a fully reclined seat back position, the seat
further comprising a seat bight region disposed between the first
axis and the second axis, and wherein the pivot axis is located
above and forwardly of the seat bight region.
3. The seat as recited in claim 1, further comprising armrest
portions, wherein the seat back portion comprises lateral
extensions that are pivotably connected to the armrest portions
about the pivot axis.
4. The seat as recited in claim 3, wherein the armrest portions are
integral with the seat bottom portion.
5. The seat as recited in claim 1, wherein the seat bottom portion
is curved upwardly at the rear thereof, and the seat back portion
is similarly curved at the bottom thereof to slide along the seat
bottom portion throughout a range of adjustment of the seat back
portion relative to the seat bottom portion.
6. The seat as recited in claim 1, comprising a releasable latch
mechanism for selectively immobilizing the seat back portion at a
desired position.
7. The seat as recited in claim 6, wherein the latch mechanism
comprises a plurality of notches supported by the seat bottom
portion, and a retractable bolt carried by the seat back portion
and engageable with a selected notch of the plurality of
notches.
8. The seat as recited in claim 6, wherein the seat back portion
further comprises a handle operatively connected to the latch
mechanism to actuate the latch mechanism between a latched
configuration and an unlatched configuration.
9. The seat as recited in claim 6, wherein the latch mechanism
comprises two laterally spaced rows of notches on the seat bottom
portion and two retractable bolts carried by the seat back portion,
wherein each bolt is configured to engage a selected notch of its
respective row of notches.
10. The seat as recited in claim 9, wherein the seat back portion
further comprises a handle operatively connected to the both bolts
for simultaneous actuation of the bolts between a latched
configuration whereby the bolts engage the selected notches and an
unlatched configuration whereby the bolts are free from the
notches.
11. A child high chair comprising: a reclinable seat, the seat
including: a seat bottom portion having a curved rear surface; a
seat back portion pivotally mounted relative to the seat bottom
portion such that the seat back portion is movable through a range
of angular positions relative to the seat bottom portion, the seat
back portion having a lower edge that translates vertically along
the curved rear surface as the seat back pivots relative to the
seat bottom.
12. The adjustable seat as recited in claim 11, further comprising
armrest portions, wherein the seat back portion comprises lateral
extensions that are pivotally connected to the armrest portions at
a pivot axis.
13. The adjustable seat as recited in claim 12, wherein the pivot
axis is disposed forwardly of the lower edge of the seat back
portion.
14. The adjustable seat as recited in claim 11, wherein the armrest
portions are integral with the seat bottom portion.
15. The adjustable seat as recited in claim 11, wherein the curved
rear surface is curved upwardly and the seat back portion is
similarly curved at the bottom thereof to slide closely past the
seat bottom portion throughout the range of positions.
16. The adjustable seat as recited in claim 11, comprising a
releasable latch mechanism for selectively immobilizing the seat
back portion in a desired position.
17. The adjustable seat as recited in claim 16, wherein the latch
mechanism comprises a plurality of notches carried by the seat
bottom portion, and a retractable bolt carried by the seat back
portion, wherein the retractable bolt is retractably engageable
with a selected notch.
18. The adjustable seat as recited in claim 16, wherein the latch
mechanism comprises two laterally spaced rows of notches carried by
the seat bottom portion, two retractable bolts carried by the seat
back portion, wherein each bolt can be actuated to retractably
engage a selected notch of its respective row of notches or to
disengage the selected notch, and a handle on the seat back portion
operatively connected to both bolts for actuation of the bolts.
19. The child high chair as recited in claim 11, wherein the seat
back portion pivots with respect to the seat bottom portion about a
pivot axis, wherein the pivot axis is located above and forwardly
of the lower edge of the seat back portion throughout at least a
portion of the range of angular positions.
20. The child high chair as recited in claim 11, wherein the seat
back portion pivots with respect to the seat bottom portion about a
pivot axis, wherein the pivot axis is located above and forwardly
of the lower edge of the seat back portion throughout an entirety
of the range of angular positions.
21. The child high chair as recited in claim 11, further comprising
a tray supported above the seat bottom portion.
Description
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS
[0001] This application is a division of U.S. patent application
Ser. No. 10/803,086, filed on Mar. 18, 2004, which claims the
benefit of U.S. provisional application No. 60/457,325, the
disclosure of each of which is incorporated herein by reference in
its entirety.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Disclosure
[0003] The present invention relates to seating for children and,
in particular, to high chairs.
[0004] 2. Description of Related Art
[0005] High chairs have been provided with a myriad of features
designed to enhance their comfort, safety and convenience. There is
room for improvement, however, as to several aspects of high chair
design. This invention addresses these needs.
[0006] During the course of attending to a child in a highchair, it
is common practice for the caregiver to sit in front of the
highchair and rest his or her arms on the high chair tray. High
chair trays typically are made of a relatively hard, unforgiving
material and do not provide a comfortable resting place for the
caregiver's arms.
[0007] The tray of a high chair can become extremely soiled by an
infant while eating. Often relatively large food chunks remain on
the surface of the tray. The effective and controlled removal of
this debris is not adequately addressed in the prior art.
[0008] The position of a high chair tray often requires adjustment.
Often the tray sticks, or does not slide easily on the surface of
the highchair on which it bears.
[0009] High chairs that allow the height of the chair to be
adjusted require the use of two hands to make the adjustment. Busy
caregivers often find that only one hand is free for making a
height adjustment. This requires the caregiver first to free up one
hand before the adjustment can be made.
[0010] Stringent stability (tipping) regulations have a direct
impact on the footprint geometry of a high chair. Generally
speaking, consumers prefer to have a high chair with a small
footprint so that it can be integrated into the kitchen or table
setting more conveniently. The footprint size, which is governed by
stability concerns, is necessarily larger in high chairs that have
a recline feature. Because a child's head comprises a significant
proportion of his or her body weight, in reclining high chairs the
center of gravity can move substantially to the rear as the child
is moved from a full upright to a reclining position. Thus it is
highly desirable to minimize the shift of the center of gravity
when the seat back is reclined, whereby the footprint of the high
chair can be minimized.
[0011] Recline mechanisms that allow the seat back to pivot at the
bight portion of the seat usually cause a change in the distance
between the seat back and the crotch support of the armbar as the
seat is moved through various recline positions. This distance is
regulated by industry standards, and it is highly desirable to be
able to vary the angle of the seat back without significantly
altering the distance between the seat back and the crotch
support.
[0012] Children typically utilize high chairs throughout a
relatively large age span. The wide range of physical development
that a child undergoes during this time presents a formidable
challenge to designing a high chair that ideally accommodates all
of the physical needs of the child. This situation is exacerbated
by high chairs that have recline features, enabling the unit to be
used for very young infants, and removable arm bars, which when
removed allow the chair to be pulled right up to a table for use by
an older child. One aspect of available high chairs that does not
adequately address this need is the seat height relative to the
tray. Most high chairs are designed to accommodate the older child,
which means that the tray is usually higher than optimal for an
infant or a toddler.
[0013] Finally, a consumer-preferred feature is to have
entertainment value readily available for a child in a high chair.
Often after a meal it is desirable to keep the child in the high
chair and quickly occupy the child with interesting objects that
cannot be thrown to the floor.
SUMMARY OF THE INVENTION
[0014] An adjustable child high chair seat is provided and includes
a seat bottom portion and a seat back portion that is pivotally
mounted relative to the seat bottom portion about a pivot axis. The
seat back portion can move between a first angular position
relative to the seat bottom portion and a second angular position
relative to the seat bottom portion, wherein the second angular
position is angularly offset from the first angular position. The
seat back portion defines a lower edge disposed proximal to the
seat bottom portion. A first axis is defined by an intersection of
the lower edge of the seat back portion and the seat bottom portion
when the seat back is in the first angular position. A second axis
is defined by an intersection of the lower edge of the seat back
portion and the seat bottom portion when the seat back is in the
second angular position. The second axis is offset from the first
axis, and the pivot axis is located above and forward with respect
to the first and second axes.
[0015] It should be appreciated that the foregoing and other
aspects of the invention will appear from the following
description. In the description, reference is made to the
accompanying drawings which form a part thereof, and in which there
is shown by way of illustration, and not limitation, preferred
embodiments of the invention. Such embodiments do not necessarily
represent the fill scope of the invention, and reference must
therefore be made to the claims herein for interpreting the full
scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and other features, aspects and advantages of the
invention will become apparent from the following detailed
description and the accompany exemplary embodiments shown in the
drawing figures, in which:
[0017] FIG. 1 is a top perspective view of a high chair according
to the invention;
[0018] FIG. 2 is a front perspective view of a tray according to
the invention;
[0019] FIG. 3 is a top perspective view of the tray of FIG. 2;
[0020] FIG. 4 is a front perspective view of a tray and a raised
tray insert according to the invention;
[0021] FIG. 5 is a front perspective view similar to FIG. 4,
showing the tray insert in position on the tray;
[0022] FIG. 6 is a bottom plan view of a tray according to the
invention;
[0023] FIG. 7 is a top plan view of a lower tray on which the tray
of FIG. 6 rests;
[0024] FIG. 8 is a cross-sectional view of the tray taken along
line 8-8 in FIG. 6;
[0025] FIG. 9 is a bottom perspective view of the chair of FIG. 1,
showing a portion of the height adjustment mechanism according to
the invention;
[0026] FIG. 10 is a detail perspective view similar to FIG. 9,
showing the height adjustment mechanism in the latched
condition;
[0027] FIG. 11 is a detail perspective view similar to FIG. 10,
showing the height adjustment mechanism in the unlatched
condition;
[0028] FIG. 12 is a bottom perspective view of the leg rest portion
of the chair of FIG. 1 and the support for the leg rest
portion;
[0029] FIG. 13 is a perspective view of portions of the seat of the
chair of FIG. 1;
[0030] FIG. 14 is a front elevational view of the backrest portion
of the seat;
[0031] FIG. 15 is a perspective view of an adjustable seat assembly
according to the invention;
[0032] FIG. 16 is an exploded view of the seat assembly of FIG.
15;
[0033] FIG. 17 is partial assembly/exploded view of the seat
assembly of FIG. 15;
[0034] FIG. 18 is a side elevational view of another form of
adjustable seat assembly according to the invention, shown in its
lowest (collapsed) configuration;
[0035] FIG. 19 is a view similar to FIG. 18, showing the seat
assembly of FIG. 18 in an elevated (expanded) configuration;
[0036] FIG. 20 is a bottom perspective view of the seat assembly of
FIG. 18;
[0037] FIG. 21 is a bottom perspective view of the seat assembly of
FIG. 18, with the base removed;
[0038] FIG. 22 is a perspective view of the accessory bar according
to the invention, shown in the forward position; and
[0039] FIG. 23 is a perspective view of the accessory bar of FIG.
22, shown in the raised position.
[0040] It is to be understood that the invention is not limited in
its application to the details of construction and the arrangement
of components described below and illustrated in the drawing
figures. Those skilled in the art will recognize that various
modifications can be made without departing from the scope of the
invention, which is defined by the appended claims.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0041] Reference will now be made in detail to presently preferred
embodiments of the invention, examples of which are illustrated in
the accompanying drawings. An effort has been made to use the same
reference numbers throughout the drawings to refer to the same or
like parts.
[0042] FIG. 1 generally shows a high chair 10 according to the
invention, which comprises a floor-standing frame 20 supporting a
seat 30. A removable arm bar 40 on the seat supports a removable
tray 50 (see FIGS. 2, 6, 8).
[0043] Frame 20 has an integrally molded plastic chassis 202 with
spaced side portions 204 interconnected by a front cross member
206. Chassis 202 also has fixed front leg sockets 208, which
receive tubular front legs 210, and pivoting rear leg sockets 212,
which receive tubular rear legs 214. Floor-engaging feet or casters
(not shown) are provided at the bottom ends of legs 210, 214. The
pivoting nature of rear leg sockets 212 enables the rear legs 214
to be folded for more compact storage when the high chair is not in
use.
[0044] Seat 30 comprises a molded plastic seat bottom portion 310
adjustably supported on chassis 20, and a molded plastic seat back
portion 320 pivoted to seat bottom portion 310. Seat bottom portion
310 has an integrally molded leg rest portion 312, and integrally
molded armrest portions 314. Seat 30 is depicted as a bare shell,
it being understood that a padded covering (not shown) would
normally be used to enhance the comfort of the seat.
[0045] Referring to FIG. 7, armrest portions 314 support the
removable arm bar 40. Arm bar 40 is molded of plastic, has various
recesses 42, and functions as a small tray. Arm bar 40 also has a
depending crotch bar 44, which functions as a restraint to prevent
the child occupant from sliding out of the chair. Removable tray 50
is movably supported on the upper side surfaces 46 and a central
recessed surface 48 of arm bar 40, as described below.
Tray Features
[0046] The tray 50 can include at least one wheel mounted to its
underside to rotate for movably supporting the tray 50 on a bearing
surface of the chair. For example, referring to FIGS. 6 and 8, the
underside of tray 50 can be provided with three wheels: two
laterally spaced wheels 502, which ride on side surfaces 46 of arm
bar 40, and a center wheel 504, which rides on recessed track 48 of
arm bar 40. Each of the wheels is supported on an axle 506, which
is carried by webs 508 that are integrally molded into the tray.
The wheels facilitate fore/aft adjustment of the tray. Tray 50 is
retained on arm bar 40 by tabs 510 that engage the bottom side
edges of arm bar 40. Each tab 510 is carried by a side release
handle 512, which is pivoted at 514 to the underside of the tray.
Side release handles 512 are connected to a central release button
516 at the front of the tray by a pair of flexible but rigid straps
518, which are guided between webs 520 and can transmit force along
their length. A spring (not shown) can be housed in release button
516 to bias the button outwardly and, through straps 518, to bias
the retaining tabs 510 inwardly to a locking position. To move the
tray, the caregiver need only press the release button 516 inwardly
(or squeeze handles 512 upwardly) to unlock retaining tabs 510,
whereupon the tray can be rolled fore or aft on wheels 502 to a new
position and locked there.
[0047] The front of the tray 50 is ergonomically contoured to
enhance comfort for the caregiver. Referring to FIGS. 2 and 3,
central portion 526 of tray 50 is surrounded by a raised rim 530,
and the front of the rim has an undulate height profile.
Specifically, the medial portion 532 of the rim is higher than the
two adjacent rest portions 534, and the rest portions 534 are
flanked by higher shoulder portions 536. The rest portions 534 have
gently curved upper surfaces and rounded upper edges. These
features cradle the caregiver's hands or arms quite comfortably, as
shown in FIG. 3.
[0048] Further, as can be seen in FIG. 2, the central portion 526
of the tray 50 gently slopes upward to the upper edge of rim 530.
That is, the inner surface 538 of rim 530 is angled, rather than
perpendicular, relative to central portion 526 and the upper edge
of rim 530 to make wiping away of food scraps from the central
portion 526 over rim 530 easier.
[0049] Referring to FIGS. 4 and 5, tray cleaning after meals or
other activities is facilitated by a removable flexible tray insert
or liner 60 that fits onto tray 50. Insert 60 is molded of a
flexible plastic or rubberized material that is shaped generally to
conform to and cover the central portion 526 of the tray. The
insert 60 also can be shaped generally to conform to and cover at
least the immediately adjacent portions of the rim 530 of the tray.
The insert 60 includes a central (major) portion 604 to cover the
central portion 526 of the tray 50 and a raised rim 606 surrounding
the central portion 604. The raised rim 606 can cover at least the
immediately adjacent portions of the rim 530. In one embodiment, as
shown in FIG. 5, the raised rim 606 extends over and completely
covers the rim 530 of the tray 50. A convenience tab 602
facilitates removal of the insert. Insert 60 thus can readily be
removed from tray 50, carried to a trash receptacle, and flexed and
tilted to channel food scraps or other debris to the center and one
edge of the insert (as is commonly done, for example, with table
place mats) for easy disposal of the debris. In addition, the
insert 60 is flexible enough to fit, when folded, into a
standard-sized homeowner's sink, which facilitates clean-up. The
central portion 604 of insert 60 is substantially flat, such that
the insert 60 can be stably supported on any flat surface, e.g., a
table, as a rimmed place mat when removed from the tray. The insert
60 is can be made of a material that has a relatively high
coefficient of friction so that it will not slip or slide easily on
a table or other surface. The insert 60 can include a recess 608 to
hold a beverage. The recess 608 can be received in a beverage
recess 528 of the tray 50. Additional recesses can be provided to
enhance the versatility of the insert 60.
Chair Height Adjustment
[0050] FIGS. 9-11 depict the features that enable one-handed
adjustment of the height of the seat 30 relative to the frame 20.
The inboard face of each chassis side portion 204 has an integrally
molded rack 220 with a series of vertically spaced teeth 222. Each
tooth 222 has a support shoulder or ledge 224 that is adapted to
bear one half the weight of the seat. A rear bearing surface 226
and a shoulder 228 on chassis side portion 204 serve to guide and
locate seat 30.
[0051] A transverse bar 350 is pivoted about its longitudinal axis
352 to the bottom rear of seat 30 in a U-shaped recess 354 at each
side of the seat. A retaining tab 356 at each side helps to keep
bar 350 in position in recesses 354, while allowing the bar 350 to
pivot. A tooth 360 at each end of bar 350 engages the shoulder 224
of a selected tooth 222 in its respective rack 220. A leaf spring
357 biases transverse bar 350 to the latched position, i.e., the
position in which teeth 360 engage teeth 222 (see FIG. 10). A
central handle 358 is integral with transverse bar 350. Handle 358
has a grip portion 358a adapted to be grasped by the fingers of a
hand, and a heel portion 358b adapted to be engaged by the heel of
the hand when the fingers engage grip portion 358a. A curved
extension 362 at each side of seat 30 wraps around the respective
chassis side portion 204. The extension 362 has a bearing surface
366 and a shoulder 368 that mate with bearing surface 226 and
shoulder 228, respectively.
[0052] To change the height of seat 30, central handle 358 is
grasped by a single hand, with the fingers wrapped around grip
portion 358a and the heel of the hand engaging heel portion 358b.
Heel portion 358b is then raised, which pivots transverse bar 350
in the direction of the arrows in FIGS. 10 and 11 to move teeth 360
out of engagement with teeth 222 (see FIG. 11). Substantially the
entire weight of the seat (and the seat occupant) can be borne by
the fingers that engage the grip portion 358a of handle 358,
whereby the seat can be raised or lowered by one hand to a new
position. When the new position is reached, handle 358 is released,
which allows bar 350 to pivot back to the latched position with
teeth 360 in engagement with new teeth 222. The mating bearing
surfaces 226, 366 help to resist downward tilting of seat 30.
Additional stability for seat 30 is provided by chassis front cross
member 206 (see FIG. 12), which has guiding support slots 207 that
slidably engage support flanges 313 on leg rest portion 312. The
dashed lines in FIG. 12 illustrate how the leg rest portion 312
moves relative to the front cross member 206.
Recline Features
[0053] FIGS. 13 and 14 depict the recline features of the high
chair. The seat back portion 320 is pivotally mounted to the seat
bottom portion 310 about a transverse pivot axis, for example, axis
322, to move between an upright position (as shown in FIG. 14) and
a reclined position. The seat back portion 320 and seat bottom
portion 310 together define a seat bight region, generally
indicated 316, along the seat bottom portion 320. The seat bight
region 316 is defined as the region between a first transverse axis
A1 of the seat bottom portion 310, where a lower edge 323 of the
seat back portion 320 intersects the seat bottom portion 310 when
the seat back is in the upright position, and a second transverse
axis A2 of the seat bottom portion 310, where the lower edge 323
intersects the seat bottom portion 310 when the seat back is the
reclined position. The pivot axis 322 is located above and
forwardly of this seat bight region, as can be seen in FIGS. 1 and
13. According to another aspect of the invention, the pivot axis
322 is located above and forwardly of the lower edge 323 of the
seat back portion 320 throughout the range of adjustment of the
seat back portion 320.
[0054] Seat back portion 320 has integrally molded lateral tabs or
extensions 321 that extend forwardly and are pivoted to armrest
portions 314 about the pivot axis 322. As compared to a
conventional arrangement in which the seat back is hinged to the
seat bottom in the seat bight region, the geometry of chair 10
substantially lessens the rearward excursion of the seat back
portion 320 when reclined. This minimizes the rearward shift of the
center of gravity of the occupied high chair, whereby the high
chair can meet stability requirements with a smaller footprint. The
rear portion of seat bottom portion 310 is curved upwardly, in the
seat bight region 316, and the bottom 324 of seat back portion 320
is similarly curved so as to slide closely past the seat bottom
portion 310 throughout the range of adjustment of the seat back
portion 320.
[0055] The seat back portion 320 can be selectively locked in
various positions. This is facilitated by a series of notches 318
near each side of the seat bight portion 316 of seat bottom portion
310. The notches 318 are engaged by retractable bolts 326a, 326b
carried by seat back portion 320. These bolts 326a, 326b are
essentially the ends of guided flexible, but rigid, straps 328a,
328b, similar to those used on the underside of tray 50 (see FIG.
6). The straps 328a, 328b are connected to a central release button
or handle 330 at the top of seat back portion 320 through a central
strap 329, which is bifurcated and laterally directed at its bottom
to engage straps 328a, 328b. As seen in FIG. 14, bolts 326a, 328b
are biased into engagement with notches 318 under the influence of
a coil spring 332, which acts on straps 328a, 328b indirectly
through central strap 329. Downward pressure on release button 330
moves central strap 329 downwardly against the action of spring
332. This downward movement is translated into a lateral pulling
movement of straps 328a, 328b as indicated by the arrows in FIG.
13, whereby the bolts 326a, 326b are retracted from the notches
318. A stop 334 associated with release button 330 engages a window
edge 336 in seat back portion 320 to limit upward movement of the
release button.
[0056] The seat bottom portion 310 has a seating surface 310S upon
which a child sits, and the seat back portion 320 has a back
support surface 320S against which a child can lean its back.
According to another further of the invention, the pivot axis 322
is located above the seating surface 310S and forwardly of the back
support surface 320S throughout the range of adjustment of the seat
back portion 320. The seating surface 310S can have a centerline
(not shown) that bisects the seat bottom portion 310 into left and
right halves and that extends from a front edge of the seat bottom
portion 310 to the front edge of the seat bight region 316.
Likewise, the back support portion 320 can have a centerline (not
shown) that bisects the back support portion 320 into left and
right halves. According to yet another aspect of the invention, the
pivot axis 322 is located above the portion of the seating surface
320S along its centerline and forwardly of the portion of the seat
back portion 310 along its centerline.
[0057] As can be seen from FIG. 13, the angle of the seat back
portion 320 relative to the seat bottom portion 310 varies, as the
seat back portion 320 moves between the upright position and the
reclined position, throughout its range of adjustment. Yet the
distance between the seat back portion and the crotch support is
not significantly altered.
Seat-to-Tray Height Adjustment
[0058] FIGS. 15-17 depict a first embodiment 70 of an adjustable
seat assembly that is adapted to support the chair occupant at a
selected height relative to the tray. As best seen in FIG. 16, seat
assembly 70 comprises three main components: a base 710 adapted to
rest on seat bottom portion 310; a seat platform 730 adapted to
overlie base 710 and support the occupant; and an intermediate
elevating mechanism 740 for adjusting the height of the seat
platform relative to the base. These components can be made of
injection molded plastic material. Base 710 is upwardly dished and
has a central opening 712 that accommodates crotch bar 44 (see
FIGS. 1 and 7) and a webbed crotch restraint, if so equipped. Seat
platform 730 also has a crotch bar hole 732 that serves the same
purpose. Side studs 714 on base 710 extend through side holes 734
in seat platform 730 to keep the parts from separating, and the
studs 714 can be used to secure the seat assembly to the seat
bottom portion 310 by suitable means (not shown). A front notch 718
is aligned with a central recess 720, and both of these structures
cooperate with a portion of the elevating mechanism 740, as
described below. A plurality of wedges 722 have ramped surfaces 724
over which a portion of the elevating mechanism rides. The
elevating mechanism is guided in two parallel notches 716 in base
710.
[0059] Elevating mechanism 740 comprises a frame 742 surrounding a
large central aperture 744 (through which crotch bar 44 can pass).
At the front of frame 742 is a threaded hole 746 flanked by guide
feet 747. A shaft 748 has a threaded portion 750 that engages
threaded hole 746, with the rear end 752 of shaft 748 captured in
recess 720. The shaft 748 also has a groove 754 captured in the
front notch 718 of base 710. A knob 756 at the front end of shaft
748 facilitates rotation of shaft 748, which moves frame 742 fore
or aft. At the rear of frame 742 is a bar 760 with lower surfaces
762, which ride on ramps 724, and upper surfaces 764, which support
seat platform 730. Thus, as knob 756 is turned, frame 742 and bar
760 move fore or aft over wedges 722 to change the height of seat
platform 730.
[0060] A second adjustable seat assembly embodiment 80 is shown in
FIGS. 18-21. The embodiment 80 also comprises a base 810, a seat
platform 830, and an adjusting mechanism 840. In this embodiment,
the element that moves fore and aft to adjust seat platform height
is a U-shaped slide 844 (see FIG. 21) that has wedges 845. Crotch
bar holes 812, 842 are provided, as in the first embodiment. Slide
844 has a front cross member 846 with a slot 848. A wheel 850 is
centrally pivoted to the underside of seat platform 830, and has an
eccentric pin 852 that resides in slot 848. Rotation of wheel 850
moves pin 852, which moves slide 844 with its wedges fore or aft,
thus causing the height of seat platform 830 to change.
Accessory Bar
[0061] FIGS. 22 and 23 depict a U-shaped accessory bar 90 and its
use. Accessory bar 90 can be made of plastic or other suitable
stiff and lightweight material. Accessory bar 90 is shown covered
by a soft sleeve 902 and supporting a number of toys 904. The ends
906 of bar 90 are pivoted to the seat, for example, to the seat
back portion 320 as shown, about a transverse axis. Any suitable
pivots may be used. Each pivot can have two stops that limit
movement of the bar 90. The first stop keeps the bar from dropping
onto the tray 50 when the bar is in the forward (use) position
(FIG. 22). The second stop keeps the bar from dropping rearwardly
below the upright (inactive) position (FIG. 23). Thus, the
accessory bar with its toys or other appendages can be quickly
swung down in front of the seat occupant, or quickly moved out of
the way to the upright position. In addition, the pivot connection
of the bar 90 to the seat back portion 320 can be a break-away
connection so that, if the bar 90 inadvertently is pivoted
rearwardly past the second pivot, a predetermined force on the bar
90 (for example, a force applied by a curious child attempting to
hang on, or step on, the bar 90) allows the bar 90 to break-away
from the seat back portion 320. In this manner, the high chair 10
will not be pulled over, rearwardly, if such force is applied to
the bar 90.
[0062] The preferred embodiments have been set forth herein for the
purpose of illustration. This description, however, should not be
deemed to be a limitation on the scope of the invention. Various
modifications, adaptations, and alternatives may occur to one
skilled in the art without departing from the claimed inventive
concept. The true scope and spirit of the invention are indicated
by the following claims.
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