Static structures (e.g. – buildings) – Specified wear or friction-type traffic-carrying surface – Tread-nosing; e.g. – shaped stair pad
Reexamination Certificate
1997-02-19
2002-05-14
Callo, Laura A. (Department: 3635)
Static structures (e.g., buildings)
Specified wear or friction-type traffic-carrying surface
Tread-nosing; e.g., shaped stair pad
C052S177000, C052S716100, C052S717050
Reexamination Certificate
active
06385923
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to supporting flooring at the juncture of materials of different heights, at the transition at the juncture between the materials, where the transition is generally unnoticeable to people walking on flooring over the juncture or where wheeled vehicles will not be jostled or upset when crossing transition at the juncture.
2. Description of the Prior Art
There is often a juncture in floors made of made of different materials, since the floor often has areas of different heights. In may institutions, factories exhibitions halls, shopping malls and transportation facilities and the like, floors of hard materials such as tile, marble, granite, brick, guarry stone or ceramic are frequently adjacent to floors of concrete or wood. The adjacent floors usually meet at a juncture, and there is an interface between the floor area of the relatively high height and the floor area of a relatively low height. Transition flooring is often put over the floor areas to make it easier and safer to walk across the floor areas and the juncture, and to make it easier for wheeled vehicles to traverse the juncture of the floor areas. It is common to ramp up to the higher floor area made of hard materials.
However, the transition flooring, which can be flexible vinyl or rubber based sheet or tiles, or a carpet material, or a hardened resilient material such as vinyl composition or hard rubber tiles must cross the juncture. If no transition support is provided, there could be a sharp incline in the flooring at the juncture. People could trip or at least be surprised when they step on tile flooring at the juncture, especially if they are unaware that the difference in heights exists. In addition, wheeled vehicles could be jostled, tipped or possibly overturned if they reach an unexpected abrupt change in the heights of the flooring. Moveover, the transition flooring could become frayed, cracked or torn over time, especially if the juncture is in an area of high traffic.
In most instances in commercial buildings where the sharp transition between floor materials of different heights is made more gradual, a worker uses a trowel to lay by hand cementious material such as a latex underlayment at the juncture between the high and low flooring levels. This is time consuming and expensive, and the time to lay the material depends on the ability and skill of the troweler. Once the troweler has laid the cementious material, he or she uses adhesive to connect the flooring material to the cementious material. In other cases, workers stack old tile to reduce the steepness of the juncture between the adjacent flooring areas.
The difference in height between the two areas of the floor as discussed above are often not great, often around ¼ inch, so the problem has not been previously and seriously addressed. Architects have no standard for addressing the problem. Compensating for the difference in heights between adjacent flooring areas is a real problem.
There are various patents which have been issued relating to the support of carpets near walls, including U.S. Pat. Nos. 530,096 (Eckman 1894), U.S. Pat. No. 1,070,273 (MacLean 1913), U.S. Pat. No. 1,401,490 (Ratlijens 1921), U.S. Pat. No. 1,483,941 (Kasson 1924) 1,833,732 (Barrows 1931), 1,988,603 (Mciaren et al. 1935), 2,677,145 (Adams 1954), 3,086,262 (Krantz 1963) and 4,187,656 (Lutz 1980).
However, the foregoing patents are not directed to the support of flooring at the juncture between adjacent floor areas of different heights, U.S. Pat. No. 1,128,061 (Schroeter 1915) is directed to metal edge binding in linoleum, which is also not a problem to which the present invention relates. U.S. Pat. No. 5,475,953 relates to an edge molding strip for protecting the floor covering between first and second floors of different heights, but it relates to the objects of the present invention in only a very general way. U.S. Pat. No. 5, 243,798 provides a wedge shaped finishing member for draining water away from a bathtub, and it too is not directed to the problems to which the invention is directed.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a support for flooring covering floor areas of different heights.
Another object of the invention is to provide a support for flooring, such as those having vinyl or rubber components or those made of carpeting, which cover the juncture of flooring areas made of different materials and have different heights.
An additional object is, to provide a support for hard flooring, such as hard resilient flooring like vinyl composition or hard rubber tiles, for covering the juncture of flooring areas made of materials having different heights.
A further object of the present invention is to provide a transition support for flexible sheet flooring at the juncture of floors made of ceramic or tile, and floors made of concrete or wood, where there is a difference in heights between the two sections of the floor.
Yet another object of the invention is to provide a transition support for flooring as described above, which is generally unnoticeable to person walking across the support or which does not jostle wheeled vehicles crossing the support.
An object is to provide a transition support for, flooring areas of different heights which can be installed by workers who need not be highly skilled in laying transition supports.
A still further object of the invention is to provide a transition support as described above which can be made in large economical quantities, and which can be installed quickly, economically and effectively in large institutional buildings such as schools and hospitals, office buildings, factories, shopping malls and other stores, exhibitions halls transportation facilities and the like.
According to the preferred embodiment of the invention, a transition support (which is also called a patch board or leveler strip) has a wedge shaped construction. It is made of a flexible plastic such as vinyl and has a thick end portion, a parallel thin end portion, and a tapering section which extends from the upper portion of the thick end to the thin end. Alternatively, it can be a hard material such as vinyl composition or hard rubber tiles. (The sections will be described as if the transition support is in place, with an upper section and a lower section). The contour of the tapering section is very slight, so that walkers crossing the transition support, especially when it is covered with a flooring, will not be aware of its presence, Likewise, carts, motor driven carriers, dollies, wheeled stretchers, wheeled carrying cases, and other wheeled vehicles will not be jostled or upset when they cross the transition support for the flooring supported thereby.
These and other objects will become apparent from the following description of a preferred embodiment taken together with the accompanying drawings and the appended claims.
REFERENCES:
patent: 530096 (1894-12-01), Eckman
patent: 1070273 (1913-08-01), MacLean
patent: 1128061 (1915-02-01), Schroeter
patent: 1401490 (1921-12-01), Rathjens
patent: 1483941 (1924-02-01), Kasson
patent: 1833732 (1931-11-01), Barrows
patent: 1988603 (1935-01-01), McLaren et al.
patent: 2142832 (1939-01-01), Bell
patent: 2677145 (1954-05-01), Adams
patent: 3086262 (1963-04-01), Krantz
patent: 4187656 (1980-02-01), Lutz
patent: 4557475 (1985-12-01), Donovan
patent: 5212923 (1993-05-01), Pelosi et al.
patent: 5243798 (1993-09-01), Elliott
patent: 5475953 (1995-12-01), Greenfield
patent: 5657598 (1997-08-01), Wilbs et al.
Callo Laura A.
Duramax, Inc.
Hochberg D. Peter
Holt William H.
Vierya Katherine R.
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