Abstract:
A warning system construction for slowing traffic by alerting a driver of impending danger, said construction including a supporting base structure such as a mounting frame having longitudinal spaced apart main frame members and a plurality of cross members fixed to said longitudinal members in longitudinal spaced apart relationship with raised segments mounted on selected cross members to engage the tires of a vehicle to notify the driver of impending danger.

Description:
This application is a CIP of application Ser. No. 7/458,494, filed Dec. 28, 1989, now abandoned, which in turn is a CIP of applicant&#39;s original application Ser. No. 07/420,317 filed Oct. 12, 1989, now abandoned. 
    
    
     Applicants are claiming priority of common subject matter based upon parent applications 07/420,317, filed Oct. 12, 1989 and CIP application 07/458,494, filed Dec. 28, 1989, which is a CIP of original application Ser. No. 07/420,317 filed Oct. 12, 1989 both applications having been filed in the names of Charles E. Fanslow and Mark A. Hollander as the joint inventors of the subject matter of the various claims of both applications which was commonly owned at the time the inventions covered therein or made. 
     BACKGROUND OF THE INVENTION 
     In the past, various speed bump safety devices have been invented for the purpose of slowing traffic to prevent killing or injuring highway maintenance and construction workers by alerting a driver to an impending caution situation on the highway. The following is a list of the only prior art patents familiar to the inventor: 
     
         ______________________________________PATENT NO.     ISSUED       PATENTEE______________________________________4,362,424 12/7/82      Gerald L. Barber4,342,525  8/3/82      Carl T. Mastronuzzi, Jr.4,203,685  5/20/80     Richard E. Sanchez3,065,680 11/27/62     G. P. Wiedman, Sr.______________________________________ 
    
     The first three references disclose various speed bump constructions all of which are relatively complicated and do not disclose a prefabricated multiple bump unit as embodied in this invention. The Wiedman patent shows a stop bumper or barrier which is not designed to permit the vehicle wheel to roll over it as it would be on a highway speed bump construction. 
     SUMMARY OF THE INVENTION 
     This invention constitutes a warning system for temporary installation on a highway for warning a motorist of an impending dangerous situation such as a construction zone. The concept includes a supporting base structure adapted to be located in the path of a vehicle on a highway so that the vehicle wheels will engage cross members mounted on the base structure and produce a multiple speed bump unit to notify the operator of danger ahead. The base and cross member assembly may be hinged to fold into a compact unit for easy storage and transportation to the site. The base structure may be made in the form of a frame having cross members with raised ridges made in short slightly spaced apart end to end segments to permit bending of the cross members to accommodate irregularities in the highway surface and lie flat on said surface. It is also contemplated that a &#34;rumble&#34; strip configuration may be provided which includes only a half width base frame structure for engagement with the tires on only one side (usually the right side) of the vehicle to provide an initial warning which is more moderate than the higher speed bump elements which are particularly intended to cover the full width of a traffic lane and engage the wheels on both sides of the vehicle. 
    
    
     DETAILED DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a top plan view embodying one form of this invention; 
     FIG. 2 is a front elevational view of one form of this invention; 
     FIGS. 3 through 6 show longitudinal sectional views taken substantially along the line 3--3 of FIG. 2; 
     FIG. 7 is a front elevational view of another modification of the invention; 
     FIG. 8 is a top plan view of the form of the invention shown in FIG. 7; 
     FIG. 9 is a top plan view of still another modification of the invention; 
     FIG. 10 is a sectional view taken along the line 10--10 of FIG. 9; 
     FIG. 11 is a top plan view of a modified form of the invention; 
     FIG. 12 is a side elevational view thereof; 
     FIG. 13 is a top plan view showing the connection between the cross members and the outer frame members; 
     FIG. 14 is a sectional view of a typical connecting joint between adjacent frame sections taken along lines 14--14 of FIG. 11; 
     FIG. 15 is a top plan view of a connecting bracket assembly; 
     FIG. 16 is a side elevational view thereof; 
     FIG. 17 is a end elevational view thereof; 
     FIG. 18 is a side elevational view of an inner connecting ride segment; and 
     FIG. 19 is an end elevational view thereof. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As shown in FIGS. 1-6, one form of the invention embodies a base structure in the form of an frame section 10 having longitudinal members 10a and 10b with cross-members 10c extending therebetween as shown. Selected cross-members 10c are provided with raised ridges. Two sections 10 may be hingedly connected to extend across substantially one complete highway lane when in open position. Suitable hinges 11 may be provided for this purpose. The ridges are approximately 1&#34; to 11/2&#34; high and are illustrated in a number of different configurations respectively designated by 12a, 12b, 12c and 12d in FIGS. 3, 4, 5, and 6 and are securely welded to the selected cross-members 10c as illustrated. It has been found that the frame members 10a, b, and c can be satisfactorily manufactured from ferrous metal such as steel straps, members 10a and 10c may be approximately 6&#34; wide and 1/4&#34; thick and members 10b may be 3&#34;  wide and 1/4&#34; thick. The cross-members 10c may either be welded or bolted to the longitudinal frame members 10a and 10b and the hinges 11 may either be welded or bolted to the center frame members 10b. The double width hinged units may be approximately 12 feet wide by 20 feet long when laid out on the highway surface. For temporary installation the unit may be merely laid on the surface of the roadway. For long-term installation, suitable anchor bolts 10d may be provided to anchor the sections to the highway pavement, as best shown in FIG. 1 and 2. 
     A continuous ridge and cross-member construction would produce a highly rigid unit which would tend to bridge high spots on the highway surface and produce a &#34;slapping&#34; contact when engaged by a vehicle tire. In order to minimize this problem, the ridges 12a-d, 13a and 15 are made in relatively short segments of approximately 6 to 9 inches to permit each cross-member to flex and conform to high and low spots on the highway surface and thus permit substantially flat uniform contact with the highway surface across the width of each pair of sections 10 to warn drivers of construction and other danger areas. 
     FIGS. 7 and 8 illustrate a portable model which is small enough and light enough to be carried in the trunk of a highway patrol car and which is adapted to be connected to other similar sections in order to provide a quick and easy to assemble warning unit in case of an accident or some other temporary dangerous condition. In this form, the base structure is a platform 13 which may be an integral unit as shown. A raised cross-member 13a is secured to the top of each platform 13. One end of each platform is provided with a bent tongue member 13b and the other is provided with a tongue receiving slot 13c to permit end to end connection of two or more base platforms 13. 
     In addition to the speed bump construction shown in FIGS. 1-8, a &#34;rumble strip&#34; can be provided to produce an early warning zone for high speed highway conditions. This &#34;rumble strip&#34; has a low profile and is designed to engage the tires on only one side of the vehicle to produce a early warning &#34;vibration&#34; without effecting the stability of a vehicle traveling at a high speed. A single frame unit 10 is provided having a width to cover slightly less than half the width of a highway lane. The rumble strip cross-members 10c are more closely spaced than the speed bump cross-members 10c usually approximately five feet apart and each may include three rounded ribs 15 between 1/4 inch and 1/2 inch in height (not more than 5/8&#34; high). The spacing between these cross-ribs 15 may be approximately 3 inches and the rib elements 15 may be made in short half round segments of between 6&#34;-9&#34; in length to permit flexing of the cross members 10c to conform to irregularities in the highway surface as in the speed bump segments 12a-d. 
     FIG. 11 shows a modification of the frame structure illustrated in FIGS. 1-8. In this form of the invention, two identical frame units each designated by the numeral 20 are provided. Each unit 20 has an outer longitudinal member 20a and an inner member 20b. In the form shown, the inner member is one-half the width of the outer member. These two members are rigidly connected by a plurality of cross frame members 20c and each member 20c has a plurality of ridge sections or segments 20d which may be similar to the ridges 12a illustrated in FIG. 3. These segments 20d are arranged in end-to-end slightly spaced apart relation to each other as described in connection with segments 12a and are welded to the top surface of the cross frame members 20c. The innermost segments welded to the inner member 20b are designated by the numeral 20e, as best shown in FIGS. 11 and 13. Each segment 20e is provided with a connecting cross web 20f welded across the opening of the exposed inner end thereof, as best shown in FIGS. 14 and 17. 
     A connecting unit 21 is provided for attaching the inner segments 20e to the adjacent portion of the longitudinal frame member 20b of the adjacent frame section 20. The connecting unit 21 has a top ridge panel 21a which conforms to the outer surface of the innermost segments 20e to form a continuation thereof. An anchoring hook 21b is secured across the underlying dihedral surfaces of the top ridge panel, as best shown in FIG. 17, as being welded thereto. The interlocking portion of anchoring hook 21b is provided with sloping surfaces to conform to the underlying dihedral surface of the adjacent ridge segment 20e to interlock with the connecting web 20f, as best shown in FIG. 14. An opening 21c is provided through the top of the ridge panel 21a to receive the head of an anchoring bolt 22 therethrough to recess the head below the top surface of the ridge panel, as best shown in FIG. 14. The threaded shank of the bolt extends down through an aligned aperture 21d formed through the mounting portion of the anchoring hook 21b. The underlying portion of the longitudinal frame member 20b is drilled and tapped to permit the connecting unit 21 and cross frame member 20c to be securely attached to said frame unit, as best shown in FIG. 14. A connecting unit 21 is provided at the inner end of each cross member 20c and forms an extension to the adjacent inner ridge segment 20e to overlie a portion of the inner longitudinal frame member 20b to provide a series of positive connection between the adjacent sections 20. As stated, the heads of the bolts 22 are recessed below the top of the ridge panels 21a of the connecting unit 21. 
     It is contemplated that the frame units 20 be constructed of 3/16&#34; to 1/4&#34; flat bar steel material capable of being welded by conventional welding procedures. This construction has been tested and proved to be satisfactory. The ridge sections 12a-12d and 20d and 20e are all securely welded to the underlying cross frame members 10c and 20c. It is contemplated that the ridges 20d and 20e will be approximately 1/2&#34; to 3/4&#34; high above the cross frame members 20b. The dimensions of each of the frame sections 10 and 20 are approximately 20 feet long by 6 feet wide so that two sections joined together along the longitudinal inner frame members will produce a unit approximately 12 feet wide which will extend across the entire width of a normal highway traffic lane. 
     As best shown in FIG. 11, the two joined together sections 20 are longitudinally staggered so that the left wheels of a vehicle will contact the cross ridges 20d in a slightly out-of-phase timing with the contact of the right wheels of a vehicle contacting cross ridges 20d of the adjacent off-set section unit 20. The weight of the steel units has proved to be sufficient to maintain the frame units in position on the highway surface; however, if necessary such as would be the case where lighter material is used such as nylon or other suitable light weight material, conventional lag screws may be provided for attachment to the highway material in which holes and anchors have been provided.