U.S. patent number 3,913,518 [Application Number 05/473,816] was granted by the patent office on 1975-10-21 for traffic marker with resilient column.
Invention is credited to Nathan W. Kaplan.
United States Patent |
3,913,518 |
Kaplan |
October 21, 1975 |
Traffic marker with resilient column
Abstract
A traffic marker in which an upright column carrying reflectors
is supported in a molded rubber base. The traffic marker is
comprised of a secure assembly of three resilient parts, each one
of which is easily replaceable in case of damage. The upright
column is a resilient tubing having a flared lower end. The molded
rubber base has a slightly conical opening, with an annular recess
on its under surface. A resilient rubber bellows is snugly received
through the base opening, and snugly receives the flared lower end
of the tubular column in its upper opening. The bellows functions
as a hinge member, and also as a secure assembly member. The lower
portion of the bellows is shaped as a frustum of a cone closely
received in the base opening, said cone being provided with an
external annular shoulder mating with the annular recess on the
underside of the base, and providing positive location for the
bellows. The upper portion of the bellows has an interior conical
surface mating with the flared lower end of the tubular column, and
an internal annular shoulder for seating the flared lower end of
the column.
Inventors: |
Kaplan; Nathan W. (Los Angeles,
CA) |
Family
ID: |
23881106 |
Appl.
No.: |
05/473,816 |
Filed: |
May 28, 1974 |
Current U.S.
Class: |
116/63C; 116/63P;
40/612; 248/160 |
Current CPC
Class: |
E01F
9/629 (20160201); E01F 9/688 (20160201) |
Current International
Class: |
E01F
9/017 (20060101); E01F 9/012 (20060101); E01F
9/011 (20060101); E01F 009/10 () |
Field of
Search: |
;40/145AR,125H ;248/160
;116/63R,63P,63PC ;404/1R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
|
|
|
|
|
626,097 |
|
Oct 1961 |
|
IT |
|
1,926,703 |
|
Nov 1970 |
|
DT |
|
Primary Examiner: Rothberg; Samuel B.
Assistant Examiner: Shepperd; John W.
Attorney, Agent or Firm: Shanahan; Edmond F.
Claims
I claim:
1. A traffic marker which includes:
a tubular column having sufficient vertical extent, diameter, and
reflectance, to be conspicuous to motorists, said column having an
outwardly flared lower end;
a normally vertical holder for said column, said holder
comprising:
a sleeve at the upper end of said holder for closely receiving said
flared lower end of said column;
a bellows comprising a series of bellows folds below said upper
sleeve, said bellows having a resilience permitting the deflection
of said sleeve from the vertical axis of said holder; and
a lower end of said holder having greater horizontal extent than
the diameter of said bellows, said lower end having walls diverging
outwardly and downwardly, and said lower end including a peripheral
shoulder at its lowermost edge; and
a base having sufficient horizontal extent and weight relative to
said holder and said column to support them in a normally upright
vertical position with stability, and said base being provided with
an opening for receiving said lower end of said holder, said
opening having upward converging interior walls to mate with the
downwardly diverging walls of said lower end, and said base opening
having an internal peripheral recess to accommodate said lower
peripheral shoulder on said holder.
2. A traffic marker as described in claim 1 in which said holder is
formed substantially as an upwardly converging cone, said lower end
of said holder being an annular shoulder of substantially larger
diameter than said bellows and said sleeve, said bellows
diminishing in diameter at each successive fold in an ascending
direction, and said sleeve having an internal conical surface
accommodating the flared lower end of said column and said sleeve
being provided, near its lower end, with an internal annular
shoulder for supporting and locating said flared lower end of said
column.
Description
Traffic markers have come into widespread use for directing
automobile traffic on city streets. However, it will be understood
that the traffic marker of the invention, like most previously
known traffic markers, can, with or without some modification in
size or materials, be used for directing traffic flow of airplanes
on air fields, or of pedestrians in large public buildings, and the
like.
Traffic markers are made conspicuous by means well known to those
familiar with modern construction of traffic markers, and also to
most motorists. They are made of highly reflective material,
frequently material which is fluorescent plastic, or is painted
with fluorescent paint. They should be capable of structurally
supporting suitable reflectors, which reflect lights from the
approaching headlights of approaching vehicles, to alert motorists
at night.
Most importantly, traffic markers must be extremely rugged, and
capable of being run over by vehicles without sustaining damage in
some cases, or being readily repairable in others. At the same
time, the marker may not be constructed of metal or other heavy
materials which might damage an oncoming vehicle, or injure persons
in the vicinity.
In the past, traffic markers have generally not been repairable.
They have been made of resilient rubber-like materials, tough
plastics, and the like, and have been capable of continued use even
after repeated blows from passing vehicles. Most traffic marker
designs, however, have been such that once substantial damage has
been incurred in any part of the marker, the entire marker must be
discarded.
It is a major object of the present invention to provide a traffic
marker having a new type of construction comprising a hinged
vertical column capable of yielding, when struck by a vehicle,
without sustaining damage in most cases.
It is a second important object of the present invention to provide
a traffic marker which is a simple assembly of three parts, each of
which is made of tough, but resilient material, so that component
parts may be salvaged from damaged marker assemblies, and useful
markers can be assembled in the field in the field from salvaged
parts.
The foregoing and other objects of the invention will best be
understood from the following description which should be read with
reference to the accompanying drawings, in which:
FIG. 1 is a perspective view of one preferred form of traffic
marker constructed according to the present invention;
FIG. 2 is a vertical sectional view of the lower part of the
traffic marker of FIG. 1, as seen at a vertical plane through the
axis of the marker as indicated by the numerals 2--2 in FIG. 1;
non-essential parts have been broken away, and the dimensions
enlarged for purposes of illustration; and
FIGS. 3a and 3b are fragmentary perspective views of sectional
parts of the base and column holder component parts of the marker,
together with a part of the column in FIG. 3b, showing the manner
in which the three components mate with one another in the
preferred form of the invention.
In FIG. 1, the marker indicated generally by the numeral 10 is seen
to be comprised of a relatively massive base 11, which is typically
made of molded rubber, tough and resilient, but much more resistant
to yielding than other parts of the marker; a holder 12, preferably
molded of rubber or a rubber-like plastic; and a tubular column 13,
preferably molded of a rugged and resilient plastic material such
as polyvinyl chloride. Usually, it is desirable to mount reflectors
14 on column 13 to make the marker 10 easily visible to motorists
by virtue of light reflected from the sun or the vehicle
headlights.
Base 11, holder 12, and column 13 are formed to be assembled in a
close-fitting assembly as illustrated in the sectional view of FIG.
2.
FIG. 2 also serves to illustrate the bellows construction of holder
12, which functions as a hinge to permit column 13 to be deflected
from its normally vertical position, without damage to marker 10,
or any part thereof, when the marker is struck by a passing
vehicle.
Base 11 is thick and massive and flat on its underside, in order to
provide stability for the marker 10. Base 11 is provided with a
hole 21, somewhere in its middle portion, although not necessarily
central. The hole 21 is enlarged at its lower end by a peripheral
recess 22 opening downwardly as illustrated in FIGS. 2 and 3a.
Above peripheral recess 22, the sidewalls 23 of hole 21 converge
slightly in an upward direction. It is often practical although not
required, that hole 21 be circular, and that sidewalls 23 define
the surface of a cone with a vertical axis.
Holder 12 is seen to be a unitary molded piece having three
differently constructed sections; a bottom step portion 25, which
has an upwardly converging external surface mating with the
upwardly converging surface 23, and a peripheral shoulder 26 which
closely mates with peripheral recess 22; a bellows 31 including a
series of bellows folds 32 and 33; and a sleeve 35 for closely
receiving the lower end of column 13.
Preferably, column 13 is provided with a flared lower end as
indicated at 36, and the interior of sleeve 35 is shaped with a
conical surface 37 to mate with the flared end 36; and also with an
internal annular shoulder 38 for seating and locating the lower end
of column 13.
It is a preferred construction for holder 13, that it be generally
conical. Thus, the step portion 25 converges slightly upwards, but
is larger in diameter than the bellows 31. Also, the folds 32 and
33 of bellows 31 may be of successive smaller diameter as they
increase in elevation.
Obviously, hole 21 and step 25 may be round as illustrated or may
depart from being perfectly circular, to some other shape if it is
desirable to prevent rotation of holder 12 within base 11.
It is desirable to make the column 13 out of polyvinyl pipe with an
incandescent outer surface, or some equivalent visibility, so that
the marker may be readily observed by motorists.
Also, the nature of the rubbery materials from which each of the
three components is fabricated is such that their assembly is held
together by frictional engagement, and their dimensions are such
that they are retained in assembly by a slight degree of
interference fit, and pressure between the parts at point of
contact.
Also, it will be understood that the parts are sufficiently
resilient to permit assembly of past interfering shoulders. For
example, in FIG. 3a, a sectional part of the flared end 36 is
shown, and the direction of assembly is indicated by the arrow 40,
which shows that column 13 is assembled by pushing flared end 36
upwardly past the annular shoulder 38. The resilient
characteristics of both the material of column 13 and the material
of holder 12 will permit this assembly. Conversely, in the event of
damage to any part, the application of manual force will be
sufficient to disassemble the three components of the marker 10
from one another.
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