Patent Application
20060117624
The present invention relates to portable sign stands which have a rolling base.
Signs and sign stands are used for a variety of different purposes today with virtually all types of businesses. For example, signs and sign stands of various types are used for point of purchase displays, either interior or exterior to the establishment. Signs and sign stands are also used by the traffic control and safety industry to provide notice and/or warnings to passing pedestrians and motorists.
Many of the sign stands in use today are spring-mounted wind-resistant sign stands. Some of these are shown, for example, in U.S. Pat. Nos. 3,646,696, 3,662,482, 4,288,053, and 4,548,379. There also are numerous sign stands in use today which use T-shaped legs or weighted bases in order to keep them in place. Where weighted bases are used, it is often difficult to provide appropriate size and weight base in order to provide the best wind-resistance and yet, at the same time, allow the sign stands to be portable.
Some wind-resistant sign stands with portable bases which can be easily moved from location to location are disclosed, for example, in U.S. Pat. Nos. 5,875,578 and 5,878,518 as well as EP 1,120,771 A1.
It is an object of the present invention to provide an improved sign stand which has a weighted base and is readily portable. It is also an object of the present invention to have a portable sign stand which is easier and less expensive to manufacture than known portable sign stands.
It is a further object of the present invention to provide a portable sign stand which has a base member which is easier and less expensive to manufacture. It is still another object of the present invention to provide a portable sign stand which has fewer components than know portable sign stands and which is as durable and similar in performance.
These and other objects, and purposes of the present invention will become apparent from the following summary and descriptions of the invention.
The present invention provides a portable sign stand which is an improvement over known portable sign stands. The inventive sign stand has fewer components and is less expensive to manufacture than known portable sign stands and is comparable in performance and durability. The portable sign stand includes a base member and a display sign, and also preferably a resilient or biasing mechanism which allows the display sign to move or flex relative to the base member. The base member has one or more hollow cavities which can be filled with a ballast material, such as sand, water, or the like in order to render it more stable. The resilient biasing mechanism can include one or more spring members which allows the upright display sign to flex or deflect in windy conditions or if inadvertently struck by a person or vehicle.
The base member preferably comprises a hollow molded plastic member. This provides a relatively light-weight easy to move base member to which sand, water, or other ballast material can be added to stabilize it when and where desired. The base member has one area where the wall structure is increased in thickness in order to provide a stronger and more durable location for placement and attachment of the biasing mechanism and/or display sign.
In one embodiment, the top and bottom walls of the hollow base member are joined together in one or more places in order to provide the increased thickness. In order to provide portability of the sign stands, one or more wheel members are preferably provided in the base member. In one embodiment of the present invention, the wheel members are positioned on axles and snap-fitted in mating recesses in the base member.
These and other features, benefits and advantages of the present invention will become apparent from the following description of the invention, when viewed in accordance with the attached drawings and appended claims.
FIGS. 5 AND 6 are cross-sectional views taken along lines 5-5 and 6-6 in
One embodiment of the present invention is referred to generally by the numeral 20 in
The sign stand device 20 includes a base member 22 and an upright sign display member 30. The sign display member 30 is connected to the base member 22 by a pair of coil spring members 32, 34. Although the invention is shown in the preferred embodiment utilizing a pair of coil spring members connecting the sign display member to the base member, it is also understood that the sign member can be connected to the base member in any conventional manner.
Preferably the sign display member is connected to the base member by a resilient mechanism in order to allow the sign display member to deflect or flex when subject to contact or wind forces. In this regard, the resilient mechanism could comprise one or more resilient members, such as flat spring members, torsion spring members, coil spring members, leaf spring members or the like. The resilient member could be made of a metal or composite material, or be made of a resilient plastic or elastomeric material.
The sign display member could also be attached or connected to the base member in a fixed manner which does not bend or flex. The sign display itself could be a rectangular upright member of the type shown in
Sign stands connected to base members with one or more spring members are disclosed, for example, in U.S. Pat. Nos. 3,646,696, 3,662,482, 4,288,053, 5875,578 and 5,878,518, the disclosures of which are hereby incorporated by reference. Sign stands of this type are sold under the trademark WINDMASTER™ by Marketing Displays, Inc., Farmington Hills, Mich.
The base member 22 is preferable molded from a plastic material, such as high density polyethylene, polypropylene, or the like, although other equivalent materials which could fulfill the purposes and objects of the present invention could be utilized. The inside of the base member has one or more compartments or hollow chambers 40, 42. One or more ports or openings 44 are utilized to communicate with the chambers so that they can be filled with a liquid or solid ballast material, such as water, sand, or the like.
The base member 22 is preferably molded in the size and configuration shown (in
Also, in accordance with the preferred embodiments of the invention, the base member has only one or more inlet/outlet ports 44 for filling/emptying of the internal cavity or cavities 40, 42 and these ports can be readily sealed with an appropriate plug and situated at a position where leakage is not a concern. For example, member 46 of any conventional type, preferably made of plastic or an elastomeric/rubber material, can be provided to removably seal each of the ports or openings.
When it is desired to fill the chambers in the base member with ballast, the sign stand 20 is preferably tipped or positioned at an angle. In this manner, liquid such as water from a hose can be introduced into the hollow chambers through opening 44. Plug member 46 plugs the opening after the base member is filled with ballast.
When it is desired to empty the base member 22, the sign stand 20 can be tipped over or positioned upside down. This allows the liquid or solid ballast in the base member to flow out of ports or openings.
The precise exterior appearance or configuration of the base member 22 is not critical and can be changed according to the designer or user, so long as the objects and purposes of the present invention are maintained. The base member can have a square or rectangular shape as shown in the drawings, or can have a circular, hexagonal, triangular, etc. shape. In this regard,
A recessed groove or channel 50 is provided on the upper surface 52 of the base member. The bottom of the sign display member 30 or spring members 32, 34 are positioned in the channel 50 which lowers the center of mass of the sign stand and provides increased stability. The recessed groove or channel also helps add structural stability and integrity to the base member. The channel 50 is preferably open or unobstructed at one or both ends for drainage of water, snow, or the like, and to prevent accumulation of leaves, trash and other debris. It is understood, of course, that a groove or channel is not critical or necessary to the present invention and that the sign display member and/or resilient mechanism can be simply connected or positioned to the top surface 52 of the base member.
The base member 22 has an upper wall member 26, a lower wall member 27, and at least two side wall members 28, 29. And, as indicated earlier, the base member is hollow having one or more internal hollow chambers or cavities 40, 42. When the base member 22 is formed, the upper wall member and lower wall member are merged together at one or more locations, forming an area of increased thickness 60. In this regard, in the embodiment shown in
The areas 60, 160 A-C provide increased strength for the base member where the sign display members and/or resilient mechanisms are positioned. In order to attach or connect the resilient members to the base members, holes or openings 70, 170 are formed in the areas 60, 160 A-C. The holes or openings can be formed in any manner, such as by drilling. If two spring members or mechanisms are utilized, the two holes 70 in base 22 in
The spring members 32, 34 can be connected to the base member 22 with any conventional fastening mechanism, such as bolt and nut fasteners 80, 82 (as shown in
With the present invention, it is not necessary to provide or place bracket members (not shown) on the upper or lower surfaces of the base member in order to connect the sign display members and/or resilient mechanism to the base member. The increased thickness of plastic material in the areas 60, 160A, B, C obviate the need for metal brackets or other additional structural members to prevent cracking, fatigue or failure of the base member at or adjacent the connection points of the spring mechanisms. It is also unnecessary to provide additional brackets or structural members in order to securely attach the wheel members to the base member, as pointed out below. The elimination of additional brackets or structural members reduces the total cost of the sign stand device and reduces the time to manufacture and assemble the final product.
A plurality of feet or pods 90 are provided on the bottom side of the base member 22. Preferably four feet 90 are provided for improved stability. The feet eliminate or minimize wobble or instability which might occur with a flat-bottom base member. The precise member, location, size and shape of the feet members or pods for any particular base member is within the skill of persons in the art and can be dependent on the shape and configuration of the base member itself. With the embodiment of the base members 22, 122 shown and described herein, however, four feet or pod members 90 are preferably provided.
For portability of the sign stand device, i.e. the ability to easily move it from location to location, wheel members 24, 26 are provided in recesses 100 and 102 respectively on the base member 22. Preferably two wheel members are provided although any number can be provided within the scope and purpose of the present invention. The wheel members are provided along one side or edge of the base member so the entire sign display device can be tipped and rolled to a new location. When the wheel members are positioned on the base member, a slight clearance “X” (
The wheel members 24, 26 can be provided on a single axle or on separate axle members 104, 106 as shown in
Also, the term “wheel member” is intended to include any type of roller member which can be used to assist in allowing a device to be moved relative to a surface.
As indicated, the wheels are positioned on one side of the base member and used to accommodate tipping of the sign stand device so it can be moved to other positions. The sign stand could be moved, for example, indoor for security or from one position to another merely for convenience. In order to allow the sign stand device to be moved, the sign stand device is tipped slightly so that the wheel members are fully engaged with the ground surface. In this position, the sign stand can be moved in any direction.
The corners of the base member can also be angled in order to provide additional clearance for the base member to be tipped for movement. It is only necessary in this regard to angle the two corner members adjacent the wheels, although for aesthetic reasons and uniformity it may be desired to also angle the other corners of the base member.
Preferably, accordance with the present invention, the hollow portions or chambers in the base member hold between five and ten gallons of liquid material or ballast. The weight of the material in containers or chambers of that size is believed to provide satisfactory stability in windy conditions for the sign stand.
A base member of the type shown in the drawings also has one or more large or flat surfaces which can be used for advertising members or messages. The advertisements could be decals, inserts, embossing, or the like.
An alternate embodiment of the present invention is shown in
The structure and purposes of the base member 122 are similar to those described above with respect to base member 22. The primary differences is that the base member 122 has three separate areas 160A, 160B and 160C where the upper and lower wall members are united. The areas 160A, B, C are separated by rib members 162, 164. This embodiment provides a base member which is slightly stiffer and stronger. The roller or wheel members are also positioned at a different location on the base member.
As shown in
A handle member (not shown) can be provided at one side of the base member, preferably opposite the wheel members. The handle member can be used to manually lift, tilt, or move the base member and sign stand device for adding ballast, removing or emptying the ballast, or simply transporting the sign stand from one position to another.
While the best modes for carrying out the invention have been described in detail, those familiar with the art to which this invention relates will recognize various alternative designs and embodiments for practicing the invention as defined by the following claims.
