U.S. patent number 3,873,155 [Application Number 05/363,716] was granted by the patent office on 1975-03-25 for transit seat with contoured plastic shell.
This patent grant is currently assigned to American Seating Company. Invention is credited to Chester J. Barecki.
United States Patent |
3,873,155 |
Barecki |
March 25, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Transit seat with contoured plastic shell
Abstract
A passenger seat for public transportation vehicles includes a
frame with a recessed seat area for receiving a one-piece molded
plastic shell which is provided with a contoured seat and back area
for a single passenger or each of two or more side-by-side
passengers. Separate replaceable seat and back insert panels are
received in the seat and back contoured portions which act to
retain passengers in place during turns while providing versatility
and modification possibilities in seat and back aesthetics. Means
are provided for adjusting the positions of the insert panels
during attachment to match their configurations to the contoured
portions of the shell.
Inventors: |
Barecki; Chester J. (Grand
Rapids, MI) |
Assignee: |
American Seating Company (Grand
Rapids, MI)
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Family
ID: |
26925981 |
Appl.
No.: |
05/363,716 |
Filed: |
May 24, 1973 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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232430 |
Mar 7, 1972 |
3747978 |
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Current U.S.
Class: |
297/451.4;
297/440.22; 297/452.38; 297/440.2 |
Current CPC
Class: |
A47C
5/043 (20130101); B60N 2/242 (20130101); A47C
4/02 (20130101); A47C 4/028 (20130101) |
Current International
Class: |
A47C
5/00 (20060101); A47C 5/04 (20060101); A47C
4/02 (20060101); A47C 4/00 (20060101); B60N
2/24 (20060101); A47c 007/02 () |
Field of
Search: |
;297/445,232,257,258,259,260,DIG.2 ;312/296,257A ;5/353.2
;108/158,159 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gilliam; Paul R.
Assistant Examiner: Pietruszka; Carl F.
Attorney, Agent or Firm: Price, Heneveld, Huizenga &
Cooper
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation-in-part application of copending, coassigned
application Ser. No. 232,430, filed Mar. 7, 1972, and entitled
TRANSIT SEAT WITH CONTOURED PLASTIC SHELL, now U.S. Pat. No.
3,474,978 issued July 24, 1973.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed are defined as follows:
1. In a transit seat comprising a plastic shell having at least one
contoured seat recess for receipt of a seat insert panel, said
recess having a peripheral wall of a predetermined height and a
bottom portion adjoining and adjacent at least said peripheral
wall, the improvement comprising: a seat insert panel having a
peripheral side wall defining a peripheral outline substantially
corresponding to the peripheral outline of said seat recess;
spacing means having a predetermined height and extending below the
bottom of said insert panel, adjacent said peripheral side wall,
and between said panel bottom and recess bottom portion for
positioning portions of said insert panel in spaced relationship to
said seat recess; said spacing means providing an air gap between
the bottom of said insert panel and said seat recess; at least one
of said peripheral recess wall and panel peripheral side wall being
tapered downwardly and inwardly toward the center of said recess at
a predetermined angle; attachment means for securing said insert
panel in said recess including a plurality of fasteners spaced
inwardly of said peripheral spacing means and extending between
said insert panel and recess bottom portion; said attachment means
providing an attachment of said insert panel to said shell within
said recess by drawing said panel into said recess such that as
said spacing means contacts said recess bottom portion said air
gap, provided by said spacing means, and the said predetermined
angle of said one tapered wall cooperate to accommodate any
deviations or undulations in the insert panel or seat shell recess
and yield a tight uniform fit of the periphery of said insert panel
with the periphery of said recess and space the top of said insert
panel above said bottom portion of said recess such that said panel
top is substantially flush with the top edge of said recess
peripheral wall.
2. The transit seat according to claim 1 wherein said spacing means
comprises a peripheral, depending bead formed on the underside of
said insert panel from the same material as said insert panel.
3. A transit seat according to claim 2 including a plurality of
nuts for cooperating with said threaded fasteners, one of each of
said cooperating nuts and threaded fasteners being embedded in
depending bosses on the underside of said insert panel inwardly of
said bead, the height of said depending bosses being less than the
height of said bead, and the other of each of said cooperating nuts
and threaded fasteners engaging said one of each of said nut and
threaded fasteners through apertures in the contoured seat recess
portion of said transist seat so that the cooperating nuts and
threaded fasteners can be selectively adjusted.
4. A transit seat according to claim 3 wherein said plastic shell
has raised portions at least adjacent the rear sides of said seat
recess which blend with and continue the contour of said recess
above the top periphery of said recess.
5. A transit seat according to claim 1 wherein said peripheral
spacing means comprises a strip of resilient material separate from
said insert panel and recess between the underside of the periphery
of said insert panel and the periphery of said recess.
6. In a transit seat comprising a plastic shell having at least one
contoured seat recess for receipt of a seat insert panel, said
recess having a peripheral wall of a predetermined height and a
bottom portion adjoining and adjacent at least said peripheral
wall, the improvement comprising:
a seat insert panel having a peripheral side wall, a contour
substantially corresponding to the contour of said seat recess, and
a peripheral, integral, depending bead formed from the same
material as said seat insert panel and extending below the bottom
of said seat insert panel a predetermined distance, said depending
bead being adjacent said seat insert panel peripheral wall and
between said panel bottom and recess bottom portion for positioning
portions of said seat insert panel in spaced relationship to said
seat recess providing an air gap between the bottom of said insert
panel and said seat recess; said peripheral side wall of said
insert panel extending along the edges of both said panel and said
depending bead and being tapered downwardly and inwardly toward the
center of said recess at a predetermined angle; said peripheral
wall of said recess also being tapered downwardly and inwardly
toward the center of said recess at a predetermined angle; and
attachment means for securing said insert panel in said recess
including a plurality of threaded fasteners spaced inwardly of said
depending bead and extending between the bottom of said insert
panel and said recess bottom portion whereby when said insert panel
is attached to said shell within said recess by drawing said panel
into said recess with said threaded fasteners such that depending
bead contacts said recess bottom portion, said air gap is reduced,
and said extending distance of said depending bead and said
predetermined angles of said tapered insert side wall and said
tapered, recess peripheral wall cooperate to both yield a tight
uniform fit of the periphery of said insert panel with the
periphery of said recess to substantially eliminate spaces
therebetween and to space the top of said insert panel above said
bottom portion of said recess such that said panel top is
substantially flush with the top of said recess peripheral
wall.
7. In a transit seat comprising a plastic shell having at least one
contoured seat recess for receipt of a seat insert panel, said
recess having a peripheral wall of a predetermined height and a
bottom portion adjoining and adjacent at least said peripheral
wall, said recess peripheral wall tapering inwardly and downwardly
toward the center of said recess, the improvement comprising:
a seat insert panel having a peripheral side wall and a contour
substantially corresponding to the contour of said seat recess;
a separate strip of resilient material having a predetermined
thickness and positioned adjacent said insert panel side wall below
the bottom of said insert panel and between the bottom of said
panel and said recess bottom portion for positioning portions of
said insert panel in spaced relationship to said seat recess
providing an air gap between the bottom of said insert panel and
said seat recess inwardly of said separate strip; and
attachment means for securing said insert panel in said recess
including a plurality of threaded fasteners spaced inwardly of said
panel side wall and separate strip toward the center of said panel
and extending between said insert panel and recessed bottom portion
whereby when said insert panel is attached to said shell within
said recess by drawing said panel into said recess with said
threaded fasteners such that said seperate strip contacts said
recessed bottom portion, said air gap is reduced and said
predetermined thickness of said separate strip and said
predetermined angle of said tapered recessed peripheral wall
cooperate to both yield a tight uniform fit of the periphery of
said insert panel with the periphery of said recess to
substantially eliminate spaces therebetween and to space the top of
said insert panel above said bottom portion of said recess such
that said panel top is substantially flush with the top of said
recess peripheral wall.
8. In a transit seat comprising a rigid plastic shell having at
least one contoured seat surface with a recess provided for receipt
of a seat insert panel having a contoured seat surface merging with
said contoured seat surface of said shell, said recess having a
peripheral wall of a predetermined height and a contoured bottom
portion adjoining and adjacent at least said peripheral wall, the
improvement comprising: a seat insert panel having a peripheral
side wall defining a peripheral outline substantially corresponding
to the peripheral outline of said seat recess; peripheral spacing
means having a predetermined height and extending below the bottom
of said insert panel, adjacent said peripheral side wall, and
between said panel bottom and recess bottom portion for positioning
the remaining inwardly located major portions of the bottom of said
insert panel in spaced relationship to said seat recess; said
spacing means providing an air gap between the said major portions
of the bottom of said insert panel and said seat recess; attachment
means for securing said insert panel in said recess including a
plurality of fasteners spaced inwardly of said peripheral spacing
means and extending between said major portions of said insert
panel and said recess bottom portion, said attachment means
providing an attachment of said insert panel to said shell within
said recess by drawing said panel into said recess such that as
said spacing means contacts said recess bottom portion, the air gap
provided by said spacing means functions to accommodate any
deviations or undulations in the said major portions of the bottom
of such insert panel or in the contoured bottom portion of said
seat shell recess and to space the contoured seat surface of said
insert panel above said bottom portion of said recess such that
said panel seat surface is substantially flush in the area where it
merges with the contoured seat surface of said shell.
Description
BACKGROUND OF THE INVENTION
The present invention relates to passenger seats; and more
particularly, it relates to a passenger seat designed for use in
public transportation vehicles, such as buses, rapid transit
trains, etc.
It is desirable to provide such a seat that is not only economical
to manufacture, rugged and durable in use, safe in the event of a
crash, and easy to maintain but it is also important to provide
versatility in the seating and to have a pleasant aesthetic
appearance.
In connection with safety, the primary objective to prevent injury
is to retain the occupant in his seat under conditions where the
vehicle generates forces due to deceleration or component lateral
forces due to a change of direction, as in sharp turns.
A properly designed seat contour, with sufficient inclined area
will retain the occupant up to one acceleration of gravity, 1 g,
whereas a poorly developed contour will not prevent the occupant
from sliding off the seat at forces below one-half g.
The seat must also absorb energy and moderate the magnitude of
energy transmitted to an occupant. The seat must act as a
compartment to restrain the occupant and prevent his becoming a
projectile in the event of a crash. The seat must serve as a
protective shield to ward off blows from projections of collapsing
structures. Above all, the seat must be structurally crashworthy to
provide desirable deformation characteristics and still
sufficiently strong to prevent disintegration.
The rear surface of seat should not only be aesthetically pleasing,
but it should be devoid of hazardous members that could become
lethal objects in the event of crash.
Finally, it is desirable that the seat be as free as possible from
dirt-collecting and clothing-snagging crevices.
SUMMARY OF THE INVENTION
The transit seat of the present invention provides a frame having a
recessed seat area for receiving a one-piece molded plastic shell
which is provided with contoured seat and back areas for each
passenger held by the seat. A single pedestal having a rectangular
cross section elongated in the fore-and-aft direction is located
beneath the seat spaced inwardly of the aisle end of the seat for
supporting it. The other end of the seat is preferably connected to
a wall of the vehicle.
Separate replaceable seat and back insert panels are received in
the contoured positions of the seat and back; and the contours are
such that even though seat and back insert panels are attached to
the seat and back, there is still sufficient contour to retain
passengers in place during turns of the vehicle. This has been
found to be of significant advantage, particularly in buses and
other public transportation vehicles wherein the seats are located
relatively closely behind a forward seat. In other words, an aisle
rail need not be provided with each seat, and this facilitates
ingress and egress, while at the same time, a passenger has a
feeling of stability during the various conditions of riding.
Any number of different types of seat and back insert panels may be
secured to the plastic shell, and this adds versatility in the use
of the basic seat. For example, in areas where vandalism to public
vehicles may be high, plastic insert panels may be used. On the
other hand, where wear is of primary concern, vinyl-clad steel
insert panels may be preferred. A note of luxury may be added by
padding the insert panels. This feature further adds to the
versatility in the aesthetic appearance of the seat without
significantly adding to cost and still permits the proper contour
for all inserts for lateral retention of occupants. The color
scheme can be varied from vehicle to vehicle or within a given
vehicle, and the entire color scheme of the seating may be changed
with minimal cost. Further, the invention provides a novel design
for the seat and back insert panels which ensures a tight, uniform
fit in the shell recesses which virtually eliminates
dirt-collecting and clothing-snagging crevices and which makes
prying the insert panels out by vandals nearly impossible.
A grab rail of round tubular steel grabs is inserted into open ends
of square side frame tubes beneath a top flange in the shell, and
this softens the lines of the seat and enhances its appearance by
hiding from view this connection. Thus, square or rectangular
tubing may be used for the frame with its greater strength per unit
across sectional area, and round tubing may be used for the grab
rail since it is more comfortable.
Another feature of the invention is that it permits the
construction of a seat employing a plastic shell which is securely
supported by its frame, so that the seat will not disintegrate in
the event of a crash. To this end, the shell is secured at the top
of the back and along the leg support bar.
The pedestal is secured to a transverse frame member spaced
inwardly from the aisle, as mentioned, and this eliminates
under-seat obstructions to persons moving up and down the aisle,
which has been a disadvantage in certain prior seats. Further, the
pedestal is provided with a smoothly curved foot pad to facilitate
cleaning around the aisle, and to eliminate any dirtcatching
projections or recesses. To further facilitate cleaning, the
one-piece plastic shell when fitted with properly contoured insert
panels also does not have any dirt-catching pockets as explained
above.
Certain aspects of the present invention are disclosed in but not
claimed in copending, coassigned applications in which I am
co-inventor, namely, the applications of Barecki and Karrip for
"RAPID TRANSIT SEATING", Ser. No. 157,345, filed June 28, 1971, and
for "SEAT FOR URBAN MASS TRANSIT VEHICLES," Ser. No. 280,793, filed
Aug. 15, 1972, which are directed to a cantilever transit seat.
Other features and advantages of the present invention will be
apparent to persons skilled in the art from the following detailed
description of the preferred embodiments accompanied by the
attached drawings wherein identical reference numerals will refer
to like parts in the various figures.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front perspective view of a transit seat, taken from
the aisle, constructed according to the present invention;
FIG. 2 is a rear perspective view of the transit seat of FIG. 1,
also taken from the aisle;
FIG. 3 is a view similar to that of FIG. 2 of a modification of the
seat, excluding a rear cover panel;
FIGS. 4, 5, and 6 are, respectively, plan, front, and aisle side
views of the seat of FIG. 1;
FIG. 7 is an exploded perspective view of an entire seat
constructed according to the present invention;
FIG. 8 is a side cross-sectional view taken along the plane
VIII--VIII of FIG. 5;
FIG. 9 is a front cross-sectional view taken along the plane IX--IX
of FIG. 4;
FIG. 10 is a bottom cross-sectional view taken along the plane X--X
of FIG. 5;
FIG. 11 is a bottom view of one seat insert panel;
FIGS. 12-17 are similar cross-sectional views taken through the
plane XII--XII of FIG. 4 to show different insert panels and
methods of attaching the insert panels, depending upon the
construction of the panel; and
FIG. 18 is a schematic sectional view similar to FIG. 11 showing a
preferred insert panel.
DETAILED DESCRIPTION OF THE INVENTION
Referring now to FIGS. 1-7, a transit seat generally designated 20
includes a square tubular frame 21 supported by a column or
pedestal 22 atop an oval flared foot 23 preferably having two
mounting holes 24 and 25. The column has a rectangular cross
section which is elongated in the fore-and-aft direction of the
seat. The frame 21 is attached to the wall of the vehicle by two
L-shaped wall mounting brackets 26 and 27; and the seat of this
embodiment is provided with a round tubular grab rail 28 inserted
into open upper ends 29 and 30 of a pair of side L-shaped square
tubes 31, 32 as best seen in FIG. 7. The frame 21 supports a
single-piece, plastic (preferably fiberglass) shell 33 is
preferably decoratively covered by seat insert panels 34, 35 as
well as back insert panels 36, 37 for side-by-side passenger
accommodation. The insert panels are received in appropriately
provided recesses 38, 39, 40, and 41. A suitably shaped back cover
panel 42 is also provided, but may be eliminated as in the
embodiment of FIG. 3, which is otherwise similar.
The contouring of the recesses 38-41, even when the associated
insert panels 34-37 have been secured to the shell, is maintained
and is smoothly blended into the periphery of shell 33 by providing
raised portions 33a around the side periphery of the recesses. This
is considered an important feature of the present invention in that
it provides for retention of the seated passengers even during
sharp turns. The raised portions 33a enhance the passenger
retention since they create, in effect, a deeper contour at both
sides of the base of the seats at at both sides of the back and
shoulder areas where most needed. Consequently, the passenger has a
sense of stability in riding, so much so that the need for a side
arm rail is obviated. This is important in the case of transit
seating because of the close spacing between one seat and the seat
in front of it. If a side rail were included, ingress and egress to
the seat would be partially obstructed. Thus, the insert panels
34-37 are characterized in that they conform to the contour of
their associated recesses; and, secondly, they are relatively thin
and of substantially uniform thickness so as to maintain their
respective contours and retain the body of a seated passenger.
The plastic shell 33 rests on a raised transverse front rail 43 of
square tubing and a similar upper rear rail 44 and is attached to
the square tubular frame by means of several tubular rivets 45
inserted through the side flanges 46 of the shell and the L-shaped
end tubes 31 and 32. The holes 47 for the tubular rivets are
drilled at the time of assembly so that there does not have to be
any matching of holes in the two joining pieces. Tubular rivets are
purposely omitted from the front edge flange 48 to avoid any
snagging of clothing.
A lower rear cross tube 50 is purposely depressed in its center
portion in order to provide clearance for the bucket-type recesses
38 and 39 of the shell. This can be seen best in FIG. 3. This cross
tube 50 is connected to the front cross tube 43 by a forwardly
extending tube 51. The tube 51 adds rigidity to the frame structure
and also serves to strengthen the location at which the supporting
column 22 is secured to the frame. The back cover panel 42 is
attached to the frame 21 with thread-cutting screws 52; and it is
also preferably molded from a single sheet of plastic, such as
fiberglass.
Turning more specifically to the design of insert panels 34-37, it
is more important that the insert panels have a very tight and
uniform fit within the respective recesses 38-41 to eliminate
undesirable gaps or crevices between the peripheries of the insert
panels and the peripheries of the recesses. Such gaps or crevices
not only provide dirt-collecting pockets and clothessnagging
hazards, they also make it more easy for the inserts to be pryed
free from the recesses by vandals. Further, an improper fit of the
insert panels in the recesses also results in a certain amount of
discomfort to the passenger. The insert panel design of the present
invention eliminates these problems by providing a tight, uniform
fit of the insert panels in their respective recesses.
It has been found that no matter what material the insert panels
are made of, e.g., plastic such as fiberglass or vinyl-clad steel,
it is difficult with current commercial production methods to mass
produce the seat shells and insert panels with the degree of
dimensional accuracy to ensure a tight and uniform fit of the
insert panels in the recesses in every assembled seat. Even the
most minor undulations or deviations in the insert panels or
seating shell recesses are accentuated because of the complex
contour of the panels and recesses for maximum seating comfort and
safety. Thus, to overcome the effect of these minor manufacturing
deviations of the fit of the inserts in the recesses, the insert
panels of the present invention are designed so that when the
panels are assembled in the recesses, there is an air gap between
the underside of the panels and the top surface of the recesses.
This air gap permits enough selective adjustment latitude in
securing the insert panels to the recesses to overcome any
deviations or undulations in the insert panels or seat shell
recesses.
The insert panels of the present invention may be of several
different designs. The preferred insert panel design is shown in
FIGS. 8-12 and 18. As best seen in FIGS. 11 and 12, the insert
panel 34, which is preferably made of fiberglass, is provided with
a peripheral integral depending bead 53 of a sufficient height so
that when the insert panel is secured in said recess, the top
peripheries of insert panel 34 and recess 38 will be substantially
flush. A plurality of anchoring bosses 58, preferably four, are
provided inwardly of bead 53 on the underside of the insert panel
which have a cross-sectional height less than the cross-sectional
height of bead 53 and in which are embedded or otherwise affixed
anchoring means such as nut members 59.
Further, it is preferred that depending bead 53 be angled
downwardly inwardly from the peripheral edge of the insert panel
and that the side wall 38a of recess 38 have a corresponding
downward, inward angle for ensuring a minimum gap between the
periphery of the insert panel and the periphery of the recess. The
cooperation and function of the bead 53 and recess wall 38a angles
are best shown in schematic FIG. 18. As shown, when insert panel 34
is placed in recess 38, there is an initial gap Y between the
peripheries of the insert panel and the recess. However, when
insert panel 34 is drawn toward recess 38 by screw means 60 to the
position shown in phantom, the gap Y is decreased to Z because of
the angles of bead 53 and wall 38a. Thus, as the plurality of
screws 60 are selectively adjusted, the gap between the peripheries
of wall 38a and panel 34 can be virtually eliminated. Further, the
insert and recess can be designed to achieve any predetermined
final gap Z by specifying the angle X of bead 53 and wall 38a, and
the initial clearance C between the bottom of bead 53 and recess 38
since:
z = y - c tan x
For example, with an initial gap Y of 0.040 inch, if angle X is
35.degree. and clearance C is 0.030 inch, the final gap Z will be
equal to 0.040 - 0.030(0.7002) or 0.019 inch, less than half of the
initial gap.
Thus, during assembly, the insert panel is placed in the recess and
appropriate attachment means such as screws 60 are engaged with nut
means 59 through apertures in the recesses in shell 53. Because of
air gap 57 between the insert panel and the surface of the recess,
screws 60 can be selectively tightened drawing the respective
portions of the insert panel toward the recess until a uniform fit
of the insert panel in the recess is achieved, while minimizing gap
Z. Thus, the selective adjustment permitted by air gap 57 and the
plurality of attachment means 59 and 60 permits compensation to be
made for any minor deviations or undulations in the insert panels
or in the recesses of the seat shell. Further, depending peripheral
bead 53 and angled wall 38a not only ensures a minimum gap between
the panel and recess peripheries, it also provides peripheral
support for the panel to eliminate depression of the insert panel
below the top periphery of the recesses. Also the bead 57 produces
a tension on the attachment screws which results in a locking
action.
A second type of insert panel is shown in FIGS. 13 and 14. As seen
therein, a vinyl-clad steel panel 61 has a backing strip of rubber
62 to raise the panel to the level of the shell 33 while acting as
a shock-absorbing cushion. It is attached to the shell by the use
of tee nuts 63 and washers 64 used as spacers. As with the
preferred insert panel discussed above, the air gap 57 between the
insert panel and the recess surface permits the selective
tightening of the tee nuts to achieve a uniform tight fit of the
panel in the recess.
Another variation of a fiberglass insert panel 65, which may be
used as a decorative panel, is shown in FIGS. 15-17. The panel need
not be very thick, so there is a peripheral strip of rubber 66
under the edge which functions as bead 53 above to raise the panel
up to the level of the shell surface. The tee nuts 67 are set into
the fiberglass panel when the panel is formed and, once again, the
air gap 57 is provided for the selective compensating
adjustments.
FIG. 17 shows the use of studs 68 and acorn nuts 69 in place of tee
nuts and screws. Thus substitution may be used on any of the
disclosed variations:
As will be obvious to those skilled in the art, a number of
variations can be made in the transit seat of the present invention
without departing from the spirit thereof. For example, while three
different novel insert panels have been described and illustrated,
various means of attachment may be employed as well as various
means for achieving the air gap between the insert panels and the
seat shell to permit the selective compensating adjustment during
the attachment of the insert panel to the seat recess. Therefore,
the scope of the present invention is deemed to be limited only by
the following appended claims.
* * * * *