U.S. patent number 3,775,926 [Application Number 05/179,277] was granted by the patent office on 1973-12-04 for shock absorbing chair rail assembly.
This patent grant is currently assigned to SAID Russell L. Brown, by said Lemuel G. Brown. Invention is credited to Lemuel G. Brown, Russell L. Brown.
United States Patent |
3,775,926 |
Brown , et al. |
December 4, 1973 |
SHOCK ABSORBING CHAIR RAIL ASSEMBLY
Abstract
A chair rail assembly which includes an elongated rigid
supporting member having formed on one side thereof, a pair of
bumper strip receiving channels. A pair of elongated flexible and
resilient bumper strips are carried by said channels. The chair
rail assembly may further include terminal caps secured to the
opposite ends of the rigid supporting member and a plurality of
fastener elements utilized for securing the assembly to a
supporting surface which it is to protect.
Inventors: |
Brown; Russell L. (Oklahoma
City, OK), Brown; Lemuel G. (Oklahoma City, OK) |
Assignee: |
SAID Russell L. Brown, by said
Lemuel G. Brown (N/A)
|
Family
ID: |
22655906 |
Appl.
No.: |
05/179,277 |
Filed: |
September 10, 1971 |
Current U.S.
Class: |
52/718.02;
52/312 |
Current CPC
Class: |
E04F
19/026 (20130101) |
Current International
Class: |
E04F
19/02 (20060101); E04f 019/02 () |
Field of
Search: |
;52/716-718,511,287,288,312 ;293/54D,62,71R
;49/490-491,494-495,467-469 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Abbott; Frank L.
Assistant Examiner: Friedman; Carl D.
Claims
What is claimed is:
1. A chair rail assembly comprising:
an elongated base strip constituting a web portion, and having
substantially monoplanar, parallel surfaces on opposite sides
thereof;
a pair of spaced, elongated, substantially parallel flanges
connected to opposite side edges of said base strip at the opposite
sides of the substantially monoplanar, parallel surfaces, said
flanges each projecting normal to the major plane of said base
strip and to said monoplanar, parallel surfaces for supporting said
base strip in spaced relation to a substantially monoplanar surface
upon which said chair rail assembly is mounted;
a pair of spaced, elongated, substantially parallel protuberances
projecting from a central portion of said base strip in a direction
opposite from the direction of projection of said flanges therefrom
and extending normal to said base strip and to the monoplanar,
substantially parallel surfaces thereof, said protuberances
defining between them, a central channel extending longitudinally
along said elongated base strip, and said protuberances each having
a toe projecting therefrom over said base strip and downwardly
toward said base strip to define an elongated slot extending
longitudinally along said elongated base strip parallel to said
central channel and on one side thereof, with the two elongated
slots defined by the toes of said pair of protuberances lying on
opposite sides of said central channel, each of said toes having a
beveled surface thereon which is inclined to the vertical in a
downward direction and in an inward direction toward said central
channel, said beveled surfaces each terminating in a sharp edge at
the entrance to the respective elongated slot to facilitate
longitudinal insertion of strips of elastomeric material in the
respective elongated slots;
a pair of spaced, undercut, elongated inturned additional toes
projecting from said base strip normal thereto adjacent the
opposite side edges thereof, and projecting from the opposite side
of said base strip from said parallel flanges and extending
parallel thereto and parallel to said protuberances, each of said
inturned toes being transversely spaced on said base strip from one
of said protuberances, and defining therewith an elongated outer
channel extending parallel to said central channel, each of said
in-turned additional toes carrying a tapered lip projecting toward
said base strip and tapering to a sharp elongated edge at its
nearest point of approach to said base strip, each of said
additional toes defining with said base strip, and elongated
additional slot disposed on the opposite side of the adjacent outer
channel from said central channel and extending parallel to said
outer channel and central channel, whereby elongated strips of
elastomeric material may be inserted under said tapered lip in said
additional slots by longitudinal sliding movement in the respective
outer channels;
fastener means in said central channel and spaced therealong for
fastening said elongated base strip to a substantially monoplanar
supporting surface;
a rigid cover plate covering the fastener means and closing said
central channel by interlocking, snap-in engagement with said
elongated protuberances, said cover plate extending substantially
parallel to said base strip;
bumper strip means carried in said outer channels and
including:
a first elongated strip of elastomeric material positioned in one
of said outer channels and having a central, relatively thick
protuberant bead portion which projects out of said channel in a
direction away from said base strip and which has an exposed
concave surface outside the respective outer channel in which it is
located, said first elongated strip of elastomeric material further
having a first relatively thin edge portion on one side of said
central bead portion projecting into the slot defined by the toe of
one of said protuberances with said base strip, said first edge
portion occupying a space less than the entire space defined within
said slot, said first strip of elastomeric material further having
a second relatively thin edge portion on the opposite side of said
central bead portion projecting into one of said additional slots
defined by one of said additional toes with said base strip, said
second relatively thin edge portion occupying less than the entire
space defined within said additional slot, said central protuberant
bead portion of said first strip of elastomeric material defining
with said base strip, a void air space therebetween, and the
thickness of said central protuberant bead portion being greater
than the thickness of the underlying void air space as measured
from the central protuberant bead portion to the base strip;
and
a second elongated strip of elastomeric material positioned in the
other of said outer channels and having a central, relatively thick
protuberant bead portion which projects out of said other outer
channel in a direction away from said base strip and which has an
exposed concave surface outside said other outer channel in which
it is located, said second elongated strip of elastomeric material
further having a first relatively thin edge portion on one side of
the central bead portion of said second elongated strip projecting
into the slot defined by the toe of one of said protuberances with
said base strip, said first relatively thin edge portion of said
second elongated strip of elastomeric material occupying less than
the entire space defined within said slot into which said first
relatively thin edge portion of said second elongated strip
projects, and said second elongated strip of elastomeric material
further having a second relatively thin edge portion on the
opposite side of the central bead portion of said second elongated
strip projecting into one of said additional slots defined by one
of said additional toes with said base strip, with said second
relatively thin edge portion of said second elongated strip of
elastomeric material occupying less than the entire space defined
within said additional slot into which said second relatively thin
edge portion projects, said central protuberant bead portion of
said second elongated strip defining with said base strip, a void
air space therebetween, and the thickness of said central
protuberant bead portion of said second elongated strip being
greater than the thickness of the underlying void air space as
measured from the bead portion to the base strip; and
a terminal cap secured to opposite ends of said base strip by said
covered fastener means whereby said terminal caps cannot be
disconnected from said base strip except by first removing said
cover plate.
2. A chair rail assembly as defined in claim 1 wherein each of said
terminal caps comprises:
a terminal portion; and
a slotted insert plate projecting from said terminal portion
between said flanges and along one of the surfaces of said base
strip.
3. A chair rail assembly as defined in claim 1 and further
characterized as including elongated supporting ribs extending
longitudinally along said base strip on the side thereon from which
said flanges project and positioned between said flanges.
4. A chair rail assembly as defined in claim 1 and further
characterized as including a shock absorbing panel positioned
between said flanges and adjacent, and in contact with, said web
portion of said supporting member.
5. A chair rail assembly as defined in claim 1 and further
characterized as including a terminal cap secured to opposite ends
of said elongated rigid supporting member, each of said terminal
caps comprising:
a terminal portion; and
a slotted insert plate projecting from said terminal portion
between said flanges and under said web portion, said insert plate
having a slot therein receiving said fastener means.
6. A chair rail assembly as defined in claim 1 wherein said base
strip is further characterized in including a plurality of fastener
receiving apertures opening through said base strip along the
length of said central channel and spaced from each other by a
distance not exceeding four inches.
7. A chair rail assembly as defined in claim 1 wherein said
protuberances and said cover plate having cooperating tapered
surfaces thereon whereby said cover plate can be snapped into
position between said protuberances to cover said central channel.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to protective bumper elements, and more
particularly, but not by way of limitation, to chair rails adapted
for securement to vertical walls to protect the walls from impact
by movable articles.
2. Brief Description of the Prior Art
Various types of chair rails and similar protective bumper elements
have been heretofore constructed for use in protecting walls and
other immovable objects from marring or physical damage by the
impact thereon of various types of movable articles, such as chairs
and the like. Several criteria have dictated the design and
construction of these chair rails and similar structures. Most
important is the ability of the chair rail to serve its primary
function of protecting the surface upon which it is mounted from
physical impact by an object moved into juxtaposition to that
surface. The aesthetic appearance of the chair rail has also been a
very important consideration since, in most instances, these
structures are conspicuously located in a room, hallway or space
where the overall decor is important. Finally, chair rails in
widespread usage in both new and old building construction should
be susceptible to rapid and economic installation.
A great many types of chair rail constructions have been previously
proposed, and in varying degree, successfully achieve one or more
of the objectives and design criteria described above. Normally,
for household installations, the protective characteristics of the
chair rail design are of diminished importance since usually a
chair or, at most, a table is the heaviest object which will impact
the protective chair rail, and a variety of designs are adequate to
protect the wall in such circumstances.
A problem has recently been encountered in the installation and use
of some chair rails or protective rails mounted on the walls of
hospital corridors, which problem has arisen from the inability of
the rails in use to withstand the impact forces of certain types of
equipment which are, from time to time, propelled into the
protective rail with considerable force. Thus, heavy diagnostic
equipment and various types of heavily laden carts are at times
maneuvered in relatively narrow or confined spaces, and under these
circumstances, bump against the chair rails with considerable
force. Moreover, this force is frequently concentrated or applied
to the rail through a pointed corner or a relatively sharp edge of
such carts so that the force applied through a small area crimps
the rail, and in some cases have even collapsed the rail against
the wall, resulting in damage to the wall. To our knowledge, a
chair rail or protective bumper rail which is aesthetic in
appearance, economically constructed and easily installed, and
which yet can withstand the high impact forces to which it may be
subjected in the hostile environments described has not been
devised or placed in use.
BRIEF DESCRIPTION OF THE PRESENT INVENTION
The present invention proposes an improved, high impact type chair
rail or protective bumper assembly which is made of relatively
inexpensive material by well understood processes, and which can be
quickly and easily installed in substantially any location on
essentially monoplanar surfaces. The chair rail of the invention is
constructed to absorb high impact forces without damage to the rail
or to the surface upon which it is mounted.
Broadly described, the chair rail structure of the invention
comprises an elongated, rigid supporting member which, in a
preferred embodiment of the invention, is made of metal, preferably
formed by extrusion. The elongated rigid supporting member is
provided along its length with a plurality of substantially
parallel extending channels which open to one side of the
supporting member and are configured to receive therein a plurality
of elongated, flexible and resilient bumper strips. The bumper
strips are also preferably formed by extrusion. A plurality of
suitable fasteners are used to secure the assembled supporting
member and bumper strips in a desired location on a supporting
surface, such as a wall or the like. At the opposite ends of the
rigid supporting member, a pair of aesthetically configured
terminal caps are detachably secured in position.
In each of several different embodiments of the invention, the
chair rail construction is such that, either the rigid supporting
member, or the flexible resilient bumper strips, or both of these
elements, can, through flexible yielding and, in the case of the
bumper strips, elastomeric deformation, absorb impact forces
without transmitting any significant portion of such forces to a
localized area of the wall or other surface upon which they are
mounted.
An important object of the invention is to provide a chair rail
construction capable of absorbing and dissipating within its
physical confines, all or a substantial portion of any impact force
transmitted to an exposed face of the chair rail structure.
Another object of the invention is to provide a chair rail
structure which effectively distributes to a wall or other surface
upon which it is mounted, a small fraction of the total impact
force which may be imparted thereto by an object moved against one
face of the chair rail structure.
A further object of the invention is to provide a chair rail
structure which will resiliently deflect objects impinging on the
rail.
An additional object of the invention is to provide a mechanically
sturdy, aesthetically attractive chair rail structure which can be
quickly fitted to spaces of varying size without the necessity for
drilling holes through the chair rail, and without the need to use
special sawing tools, or to possess special sawing skills.
Another object of the invention is to provide a chair rail
construction which can be easily made in several separate parts for
convenience of storage and shipment in large quantities, which
parts can be quickly and easily assembled to provide the final rail
structure for mounting on a wall or the like.
Additional objects and advantages of the invention will become
apparent as the following detailed description of the invention is
read in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an end portion of a chair rail structure constructed
in accordance with the invention. The opposite end portion of the
chair rail structure is identical to that depicted in FIG. 1.
FIG. 2 is a sectional view taken along line 2--2 of FIG. 1.
FIG. 3 is an elevation view of a terminal cap used in the chair
rail construction of the invention.
FIG. 4 is a sectional view taken along line 4--4 of FIG. 3.
FIG. 5 is a view in elevation of an end portion of a chair rail
construction constituting an alternate embodiment of the present
invention.
FIG. 6 is a sectional view taken along line 6--6 of FIG. 5.
FIG. 7 is a plan view of a terminal cap used with the structure
depicted in FIG. 6.
FIG. 8 is a sectional view similar to FIGS. 2 and 6 showing yet
another embodiment of the invention.
FIG. 9 is a plan view of a terminal cap used with the structure
depicted in FIG. 8.
FIG. 10 is a sectional view similar to FIGS. 2, 6 and 7 but showing
yet another embodiment of the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION
Referring to the drawings, an elongated, rigid supporting member
10, which is preferably constructed of metal and is preferably
formed by extrusion, is of the cross-sectional configuration shown
in FIG. 2. The supporting member 10 is thus of generally U-shaped
cross sectional configuration, having a pair of legs or flanges 12
at the outer side edges thereof, and having a central web portion,
designated generally by reference numeral 14 interconnecting these
legs or flanges. The web portion 14 carries a pair of in-turned
toes 16 relatively near to the outer side edges thereof, which toes
form with a wide base strip 18, a pair of undercut slots 20. At the
central portion of the base strip 18, a pair of T-shaped
protuberances 22 project upwardly from the base strip and carry a
pair of toes 24 defining a pair of undercut slots 26 with the base
strip. The toes 16 and 24 each carry a small downwardly projecting
lip 16a and 24a, respectively, and it may be preceived in referring
to FIG. 2 that the base strip 18 and the paired toes 16 and 24
define a pair of elongated, substantially parallel channels 28. A
central channel 30 is defined over the base strip 18 between the
protuberances 22.
It will be noted in referring to FIG. 2 that the flanges 12 at the
outer side edges of the chair rail assembly project through and
beyond the plane of the lower surface of the base strip 18 so that
when the chair rail is mounted on a wall or other surface,
represented by the dashed line 32, the base strip is supported in
spaced relation to this supporting surface by the flanges 12.
Spaced along the center line of the base strip 18 in the central
channel 30 are a plurality of fastener holes or apertures 34 shown
in dashed lines in the drawings. The fastener apertures 34 are
preferably spaced on 4 inch centers or less for a reason
hereinafter described. In mounting the chair rail assembly on a
supporting surface, screws 36 or other suitable fastening elements
are extended through the fastening apertures 34 and into the
supporting structure.
A pair of retainer flanges 38 project from the protuberances 22
into the central channel 30 and are in substantially coplanar
alignment with each other. The retainer flanges 38 have a tapered
surface on the free outer end thereof to facilitate the engagement
therewith of the notched retainer flanges 40 of a cover plate 42.
It will be perceived that the cover plate 42 by reason of this
interlocking engagement between the retainer flanges 38 and 40 can
be snapped in position between the protuberances 22 to cover the
heads of the screws 36 and provide an aesthetic unbroken appearance
to the exposed side of the chair rail assembly. The engagement also
permits the cover plate 42 to be removed without damaging the
structure.
Carried in the channels 28 along the length of the supporting
member 10 are a pair of elongated bumper strips designated
generally by reference numeral 44. The bumper strips 44 are made of
a flexible, resilient material which is of aesthetic appearance,
and is preferably susceptible to being pigmented to impart to the
strips the desired aesthetic characteristics. Polyvinyl chloride
synthetic resin constitutes a preferred material of construction,
and the bumper strips 44 are preferably made by a proces of
extrusion.
The bumper strips 44 have the cross sectional appearance depicted
in FIG. 2 of the drawings. Thus, each strip 44 has a concavo-convex
bead portion 46 which is of greater thickness at the central
portion thereof than at the two outer edges thereof. It will be
noted that beheath the thickened center of each bumper strip 44, a
space or void 50 is provided between the bumper strip and the upper
surface of the base strip 18. It will also be noted in referring to
FIG. 2 that each of the bumper strips 44 carries a pair of aligned,
parallel toe flanges 52 which project under the toes 16 and 24
defining the channels 28, but which terminate, in each case, short
of the base of the undercut slots 20 defined by these toes. In
other words, it will be perceived in referring to FIG. 2 that the
toe flanges 52 carried by each of the bumper strips 44 do not fill
the respective undercut slots into which they project, and a
substantial void space remains in this slot into which the toe
flange received therein may expand when the bumper strip which
carried it is impacted in a manner hereinafter described.
It will also be noted in referring to FIG. 2 of the drawings that
each of the toes 16 and 24 carries a downwardly and outwardly
inclined beveled or tapered surface thereon which faces the
adjacent bumper strip 44. The presence of this beveled surface on
the toes 16 and 24 permits the respective bumper strip to slide
past the toes as the bumper strip is compressed in one direction
and caused to expand transversely of the chair rail assembly.
At one or both ends of the rigid supporting member 10, a terminal
cap 56 may be provided, and this cap occupies the position relative
to the supporting member 10 which is shown in FIG. 1. Of course, a
number of the supporting members 10 may be abutted end-to-end in
longitudinal alignment along a wall without the location of a
temrinal cap at either end of any of these except those at the two
opposite ends. Each terminal cap 56 includes a quarter round
terminal portion 56 which is secured to, or preferably formed
integrally, with an insert plate 60. The insert plate 60 tapers to
a thinner section adjacent its free edge at the opposite side
thereof from the quarter round 58, and the tapered surface is
designated in the drawings by reference numeral 62. On its upper
and lower surfaces, the insert plate 60 carries a plurality of
serrations or sawtooth ridges 64 which perform a function
hereinafter described. The insert plate 60 is at least 4 inches in
length as measured from the quarter round 58 to its free edge. At
the center of the insert plate 60, an elongated, fastener receiving
slot 66 is provided. The transverse width of the insert plate 60 of
the terminal cap 56 corresponds to the distance which separates the
flanges 12 of the rigid supporting member 10 so that the insert
plate may be passed between these flanges when the terminal caps
are mounted in position. The quarter round portion 58 of each
terminal cap is equivalent in its transverse dimension to the
distance between the outside surfaces of the two flanges 12.
OPERATION AND USE
In the operation and use of the chair rail assembly depicted in
FIGS. 1-4 of the drawings, it will first be assumed that the chair
rail assembly is made up in varying lengths with the bumper strips
44 pressed into the channels 28 so as to occupy the positions shown
in FIGS. 1 and 2. With the bumper strips 44 thus mounted on the
supporting member 10, and assuming that a length of rigid
supporting member carrying the associated bumper strips is
available which will fit the space where it is to be mounted, and
will accommodate in such space, securement of two terminal caps 56
at opposite ends thereof, the supporting member 10 is first fitted
with a pair of terminal caps 56 by pressing the insert plates 60
thereof into the space defined between the flanges 12 of the
supporting member. It may be necessary in many instances to finally
entrap or secure the insert plate 60 of each terminal cap 56 in
position by placing the rigid supporting member 10 against the wall
or other supporting surface upon which the chair rail assembly is
to be mounted.
In any event, with the terminal caps 56 in position, the supporting
member 10 is placed against the wall or other supporting surface
along the line of securement desired, and screws or other fastening
members 36 are then extended through the apertures 34 formed
through the base strip 18 along the center line thereof. At this
time, of course, the central channel 30 is open and the cover plate
42 has not been snapped in place as shown in FIG. 2. In some
architectural specifications, it is required that fasteners be used
within 4 inches of the opposed ends of the chair rail in order to
assure that the rail will not easily be pulled away from the wall
or other supporting surface, and that it can be less easily pried
off at the ends by vandals. The placement of the apertures 34 on 4
inch centers or less assures that an aperture will be appropriately
positioned in relation to the end of the supporting member 10 to
meet such specifications without the necessity to drill additional
holes. Moreover, the location of an aperture within this distance
of the end of the supporting member 10, together with the dimension
which characterizes the insert plate 60 of each terminal cap 56,
permits the screw 36 or other fastening member in use to be
extended through an aperture 34 adjacent the respective end of the
supporting member 10 and through the slot 66 formed in the central
portion of the insert plate 60. The length of the slot 66 assures
that alignment may be had between some portion of this slot and the
overlying aperture 34, regardless of the distance which the
aperture 34 is located from the end of the supporting member
10.
As the fastening members 36 are screwed into the wall or other
supporting surface, the base strip 18 is formed firmly into contact
with the serrations or sawtooth ribs 64 on the upper surface of the
insert plate 60. Concurrently, the serrations carried on the lower
surface of this insert plate are caused to frictionally engage the
wall. Thus, the terminal caps 56 are prevented from sliding out of
the ends of the supporting member 10. When an adequate member of
screws or fastening members 36 have been extended through apertures
34 along the length of the supporting member 10, the cover plate 42
is snapped into position by pressing this plate into interlocking
engagement with the retainer flanges 38. The unsightly screw heads
or other portions of the fastening members 36 are thus
aesthetically covered.
When the chair rail assembly has been mounted on the wall in the
manner described, it affords excellent protection of the wall from
high impact forces resulting from heavy objects being inadvertently
propelled into the wall. Rather, such objects strike the chair rail
structure, and this structure absorbs the impact forces so as to
transmit only a small fraction of the total force to the wall, and
to distribute that force which is transmitted to the wall over a
relatively large surface area.
For the purpose of absorbing the impact forces, the bumper strips
44 are made protuberant with respect to the exposed surface of the
supporting member 10. Thus, in almost every instance, the bumper
strips 44 will, either singly or conjointly, be contacted by the
moving object, and upon such contact, the bumper strips will be
displaced toward and into the channels 28 in which they are
mounted. The voids 50 provided beneath the central portions of the
bumper strips 44 accommodate the thickened central portion of each
bumper strip which is the most protuberant part thereof. At the
time the central rotation 46 of each of the bumper strips 44 moves
inwardly, the toe flanges 52 of the strips are caused to move
divergently and further into the undercut slots 20 and 26 into
which the toes project. Concurrently, the exposed under side edges
of each bumper strip 44 can move down under the adjacent toe 16 or
24 formed on the supporting member 10 by reason of the tapered
surfaces provided on these toes.
At such time as the undercut slots 20 and 26 become completely
filled with the flexible resilient material of the bumper strips 44
when the bumper strips are elastically deformed by impact, there
remains a small amount of entrapped air in the diminished voids 50
positioned under the thickened central portion 46 of each of these
strips. This entrapped air, coupled with the relatively greater
thickness of the central bead portion 46 of each bumper strip
permits further absorption of impact forces due to the
compressibility of the entrapped air, and the resiliency and
compressibility of the material of which the bumper strips are
constructed.
It should be pointed out that in extreme cases where a very large
impact force is delivered to the exposed side of the chair rail
assembly, or where, in rare instances, the moving object impinging
upon the chair rail strikes the cover plate 42 disposed at the
central portion of the rail, the rail structure is constructed so
that absorption of the major portion of this force can still be
effected by the supporting member itself. Thus, the relatively
large span of the base strip 18 between the flanges 12 permits some
bending or distortion in elastic deformation of the base strip 18
from its monoplanar configuration. This can occur to absorb a large
distorting or bending force without forcing the base strip 18 all
the way into contact with the wall on which the chair rail assembly
is mounted. In undergoing bending in this fashion, the base strip
18 absorbs and dissipates most of the force of impact, and very
little of this force is transmitted to and through the flanges 12.
Thus, most of the impact force does not reach the wall. Such small
amount of force as is transmitted thereto is distributed over a
relatively large area due to the relatively thick character of the
flanges 12.
It should be pointed out that in addition to the described mode of
usage of the chair rail assembly of the invention, in some
instances, it may be preferable to manufacture and sell the rail
assembly in uniform lengths, which lengths will be selected to
accommodate the most common dimensions of the spaces in which the
rail assembly is to be used. In this situation, it will often be
desirable to provide the bumper strips 44 separately and apart from
the elongated rigid supporting member 10 -- that is, the packaging,
storage and shipment of these elements will be separate. The
terminal caps 56 will also be separately provided, as will the
cover plate 42. In such instances, the supporting member 10 can be
quickly and easily cut to a required length, and the 4 inch center
maximum spacing of the screw apertures 34 will assure that no
further drilling of apertures is required in order to meet the most
rigid architectural specifications. The bumper strips 44 are also,
of course, in such instances cut to length and are then positioned
in the channels 28 in either one of two ways. In the first method
of mounting the bumper strips 44 in the channels 28, they may be
pinched together so as to permit the toe flanges 52 to snap into
the undercut slots 20 and 26 as the bumper strips are mounted on
the supporting member. In another method of mounting the bumper
strips, the strips may be "threaded" or slid into the open ends of
the channels 28 at opposite ends of the supporting member 10.
The chair rail assembly is aesthetic in its appearance, and the
structure adequately protects the wall or other surface upon which
it is mounted from marring or damage by impact from moving
objects.
A modified embodiment of the invention is illustrated in FIGS. 5
and 6 of the drawings. In this instance, the elongated rigid
supporting member is designated by reference numeral 70 and is
again generally U-shaped in configuration. The supporting member 70
includes a pair of longitudinally extending legs or flanges 72,
generally similar in shape and function to the flanges 12 shown in
FIG. 2, and a base strip 73 which interconnects the flanges 72. In
the case of the embodiment shown in FIGS. 5 and 6, a single
elongated channel 74 is provided over the base strip 73 and is
defined between a pair of inturned toes 76 formed adjacent the side
edges of the supporting member 70. The channel 74 thus extends
transversely of the supporting member 70 almost from one side edge
thereof to the other. It will be noted that each of the toes 76 has
a downwardly and outwardly beveled lower surface which faces
generally toward the upper side of the base strip 73.
To facilitate the securement of the supporting member 70 to a wall
or other structure, a plurality of spaced openings 78 or apertures
for screws or other fastening members 36 are provided along the
longitudinal center line of the base strip 73. In this embodiment
of the invention, there are also provided a plurality of apertures
82 in spaced alignment along the length of the base strip 73 at a
location between the center line of the base strip and its line of
juncture with one of the flanges 72. In other words, there are two
lines of longitudinally spaced apertures 82 provided on opposite
sides of the center line of the base strip 73, and these
accommodate screws or other fastening members 36 in the manner
shown in FIG. 6.
In the embodiment of the invention depicted in FIGS. 5 and 6, the
plurality of bumper strips 44 utilized in the embodiment shown in
FIGS. 1 and 2 are replaced by a single bumper strip element 84
which is characterized in having a pair of spaced, substantially
parallel concavo-convex bead portions 86 interconnected by a
central web portion 88. At the longitudinal side edges of the
bumper strip 84, the concavo-convex bead portions 86 taper to
relatively thin edge portions which fit loosely under the toes 76
are shown in FIG. 6. It will thus be seen that the outer edge
portions of the bumper strip 84 do not completely fill the space
which exists between the toes 76 and the base strip 73 in that
there is room for expansion or flow of the bumper strip material
into the existent voids. It will be noted in referring to FIG. 6
that voids 90 remain beneath the central portions of the
concavo-convex beads 86 of the bumper strip 84, and that the web
portion 88 of the bumper strips bears flatly against the central
portion of the base strip 73. The bumper strip 84 map be secured in
position on the supporting member 70 by placing a snap-on channel
92 over the web portion 88, and extending screws or other fasteners
through apertures formed through the snap-on channel in
registration with the apertures 78 formed along the center line of
the base strip 73.
To complete the assembly, a cover plate 94 is snapped into
engagement with the snap-on channel 92 by any suitable interlocking
structure so that the screw heads are covered. The channel 92 is
preferably shaped so that the upper surface thereof extends to the
upper exposed surface of the concavo-convex bead portions 86 of the
bumper strip 84, and so that a space or void 96 exists under the
channel 92 for the accommodation of a portion of the bumper strip
material during impacting of the bumper strip as hereinafter
described.
The end caps 100 utilized with the elongated rigid supporting
member 70 of the embodiment of the invention shown in FIGS. 5 and 6
are modified from the terminal caps of the type shown in FIGS. 3
and 4, in that the insert plate portion of the terminal cap defines
three slots to permit the three transversely aligned screws 36 or
other fastening devices to pass through and secure the insert plate
in position. This construction is shown in FIG. 7. In other
respects, however, each terminal cap 100 is constructed
substantially identically to the construction of each terminal cap
56 hereinbefore described.
Another embodiment of the invention is depicted in FIGS. 8 and 9 of
the drawings. In this embodiment, the elongated, rigid supporting
member is designated generally by reference numeral 102. The
supporting member 102 includes a pair of legs or flanges 104
extending along the side edges thereof, and a base strip 106
extending transversely across the supporting member. Projecting
downwardly from the base strip at a central or medial portion
thereof are a pair of supporting ribs 108 and 110. The supporting
ribs extend parallel to each other and each leg defines a groove
for the reception of a bead 112 of elastomeric material. The
flanges 104 are also grooved or slotted to receive beads 114 of
elastomeric material. It will be perceived in referring to FIG. 8
that the beads 112 and 114 are in coplanar alignment so that when
the supporting member 102 is forced against a wall 116 or other
supporting surface, the beads 112 and 114 are compressed.
In other respects, the chair rail assembly depicted in FIG. 7 is
substantially identical to that shown in FIGS. 1 and 2, and the
same reference numerals have therefore been utilized to identify
the structurally terminal elements. and
A terminal cap which is provided for use with the chair rail
assembly depicted in FIG. 8 is shown in FIG. 9. It will be noted
that the terminal cap 118 includes a quarter rail terminal portion
120, and an insert plate 122. The insert plate 122 is constructed
similarly to the insert plate shown in FIG. 3 of the drawings,
except that the insert plate in the embodiment of the invention
depicted in FIGS. 8 and 9 is provided with a pair of slots 124 and
126 to permit this plate to pass the ribs 108 and 110 formed on, an
projecting downwardly from, the base strip 106. The central portion
of the insert plate 122 is provided with a slot 128 for the
accommodation of a screw 36 or other fastening element.
In FIG. 10 of the drawings, there is illustrated in cross section,
yet another embodiment of the invention. In this embodiment of the
invention, the elongated rigid supporting member is designated
generally by reference numeral 130. A pair of flanges 132 are
provided along the side edges of the supporting member, and in the
space between the flanges 132, a shock absorbing and force
distributing panel 134 is located. The panel 134 may be of a
relatively soft word, compressible synthetic resin or the like, and
in one embodiment of the invention, is a Masonite panel. The panel
134 is terminated short of the opposite ends of the elongated rigid
supporting member 130 so as to accommodate insertion in opposite
ends of the supporting member of terminal caps 56 of the type shown
in FIGS. 3 and 4 of the drawings.
Interconnecting the flanges 132 of the supporting member 130 is a
transverse web portion designated generally by reference numeral
136. The transverse web portion 136 is shaped to define a pair of
transversely spaced, longitudinally extending channels 138 which
extend over the length of the supporting member and receive a pair
of elastomeric, flexible bumper strips designated generally by
reference numeral 140. The bumper strips 140 have thickened central
bead portions as hereinbefore described, and are provided with edge
flanges 142 at the opposite side edges thereof. The edge flanges
142 of the bumper strips 140 project into undercut slots formed in
the web portion 136 of the elongated supporting member 130 to
retain the bumper strips 140 in the channels 138. It will be noted
that, as in the other embodiments of the invention, voids 144 are
provided beneath the thick central portion of each of the bumper
strips 140 and over the underlying web portion 136 of the rigid
supporting member 130.
Where the embodiment of the invention depicted in FIG. 10 is
employed, the force of impact imparted to the chair rail assembly
by a heavy object striking the assembly is dissipated by absorption
in the elastomeric material of the bumper strips 140, and the shock
absorbing capability of the panel 134. The large surface area of
the panel 134 which is in contact with the wall also functions to
distribute the impact forces over a large area.
It will be understood that splicing pieces (not shown) similar in
shape to the insert plate portions of the terminal caps may be used
for aligning sections of the chair rail assembly in end-to-end
relation and in interengaging them in this relationship.
Although certain preferred embodiments of the invention have been
herein described in order to illustrate the principles of the
invention, it will be understood that various modifications and
changes can be effected in the described and illustrated structures
without departure from these basic principles. Changes and
innovations of this type are therefore intended to be contemplated
within the spirit and scope of the invention except as the same may
be necessarily limited by the appended claims or reasonable
equivalents thereof.
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