Road structure – process – or apparatus – Traffic director – Vibration inducing member
Reexamination Certificate
2002-12-17
2004-07-20
Pezzuto, Robert E. (Department: 3671)
Road structure, process, or apparatus
Traffic director
Vibration inducing member
C116S06300T
Reexamination Certificate
active
06764249
ABSTRACT:
DESCRIPTION
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to an improved temporary pavement marker for use in providing short-term temporary road markers during road resurfacing, and more particularly relates to an improved temporary pavement marker having one or more clear, removable protective covers covering a reflective surface wherein each clear, removable protective cover has a unique pull-tab to facilitate quick and easy removal.
2. Background Information
Periodic road maintenance normally includes pavement resurfacing using either a chip, slurry, or road seal compound that is applied over the original surface in order to restore and protect it. When this is done, the existing painted traffic lines, be they centerlines, passing lines, no passing lines, turn lane lines, or any other traffic painted line will be covered and thereby obliterated and no longer visible.
In order to preserve the accurate location and type designation of these lines, temporary pavement markers are first installed on the road surface prior to any road coating operation. These temporary pavement markers are typically formed of a resilient plastic material having a base portion and an upwardly extending reflective portion that will extend up through each and every coating applied to the road surface during the pavement operation. Typically, the base portion has affixed to it an adhesive that holds the temporary pavement marker to the road. They are either manually set in position by someone walking along the road, or by use of some type of mechanical apparatus, which may be towed or driven along the road. The material from which temporary pavement markers are made is not intended to withstand permanent road traffic conditions, and will either be manually torn off, break off because of weather exposure, or will be pulverized by traffic on the resurfaced road. However, they are designed to last long enough for the entire resurfacing project to be completed, and up to and including the repainting of the various traffic lines upon the new surface.
For purposes of illustration in this specification, a chip sealing operation will be described, including the three stages thereof so as to fully understand the prior art and present invention.
FIG. 1
shows a prior art temporary road pavement marker that has a base portion to which an adhesive is applied, and an upwardly extending reflective portion having a pair of reflectors attached thereto. Covering the reflective portion of the prior art temporary mark are two layers of clear protective covers. The purpose of these two clear protective covers is to enable the maintenance crew to renew the reflective properties of the temporary road marker between the various coatings that are applied to the road during the chip sealing operation.
In practice, using the prior art, a crew of laborers would, prior to any chip sealing work, lay down the prior art temporary pavement markers over the top of the existing traffic lines. Typically, this is done in a coded fashion to indicate the existence of solid and broken traffic lines, turn lanes, and fog lines. Layers of clear protective covering are left in place. Since the layers of protective covers are clear, oncoming traffic can clearly see the reflective surfaces on the temporary pavement marker.
Next, in a typical chip seal operation, a coating of oil would be applied to the pavement which will coat the pavement and the reflective surfaces of the temporary road marker. This is followed by the deposit and compaction of a layer of chips or gravel, which would seal to the original surface through the base coat of oil. The dust and oil driven up through the chips during this application process will coat the temporary pavement markers and thereby obscure the reflective portion of each temporary pavement marker. If the road were open during construction, the reflective surface would not serve as a substitute for the now obscured and obliterated painted traffic lines. Therefore, in order to restore the reflective properties of the temporary pavement markers, laborers would walk along the road from one temporary pavement marker to the next, stopping at each to peel off the outermost protective cover in order to restore the reflective properties of the temporary pavement markers. This is a labor intensive, time consuming, and therefore an expensive operation. For example, if this were to be done during a typical highway resurfacing of a portion of highway approximately eight miles long, it would take a crew of two people, each working from opposite ends of the resurfacing project and walking inward, approximately eight hours to stoop down and peel off one protective coating from each of the temporary pavement markers along the entire eight miles.
Typically in the chip sealing process, a third coating is applied to the road surface that is a sealing coat of oil or other chemicals that will again obscure the reflective portions of the temporary pavement markers. If there is any time delay between the time that the third and final coat of the chip sealing process is applied and the time that the road lines are repainted, it is again necessary to remove the second and final protective coating from the temporary pavement markers in order to restore the reflectivity of the markers, both for the safety of motorist and to serve as a guide for the paint truck that is soon to follow.
The problem with the prior art is that the reflective paint covers are difficult to peel off. That is not to say that an inappropriate adhesive is used, since once they are peeled back to a point where a finger grip can be made, they can come off easily. But rather it is the fact that there is no easy way to start the peeling in order to obtain an adequate grip. This is especially true for men with large hands and short fingernails, or someone wearing gloves. It is further aggravated during periods of inclement weather when fingers become cold and dexterity is lost.
Accordingly, what is needed is a temporary pavement marker having one or more protective covers with pull-tabs incorporated therein that are easily graspable and thus easily removed with the single pull of one hand. This is an object of the present invention. Another object of the present invention is to utilize a pull-tab for the protective cover that is accessible to someone riding in a slow moving vehicle, low to the ground, where a laborer can reach out and pull off the cover while simultaneously driving or being driven alongside of a row of temporary pavement markers.
Additional objects, advantages and novel features of the invention will be set forth in part in the description which follows and in part will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
SUMMARY OF THE INVENTION
While the invention is susceptible of various modifications and alternative constructions, certain illustrated embodiments thereof have been shown in the drawings and will be described below in detail. It should be understood, however, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.
There are two preferred embodiments of the present invention. A first embodiment of the reflective road cover is formed of a body having a base portion and an upwardly extended reflective portion. An adhesive is applied to the base portion of material and designed and configured to adhere to an existing road surface in a position wherein a reflective portion extends upwardly and is visible throughout the resurfacing process.
Attached to the reflective portion are two strips of reflectors, one on each side that are desig
Dykas Frank J.
Dykas, Shaver & Nipper
Maughan Derek H.
Pechhold Alexandra K.
Pezzuto Robert E.
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