Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Panel hangers – travelers and/or tracks – Wheel mounts
Reexamination Certificate
2000-04-07
2001-11-27
Mah, Chuck Y. (Department: 3626)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Panel hangers, travelers and/or tracks
Wheel mounts
C016S099000, C049S420000
Reexamination Certificate
active
06321413
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a running carriage for a sliding door, including a pair of carrying rollers arranged on a shaft or a pair of sliding shoes intended for engagement in a running rail arranged above the sliding door and having internal running surfaces, a roller carrier by which the shaft or the pair of sliding shoes is carried, a support piece for connecting the running carriage with the sliding door, and a device for adjusting the height of the sliding door relative to the running rail. The roller carrier and the support piece are connected together by a joint, and their mutual angular position can be adjusted and displaced by an adjusting and displacing screw.
Running carriages for sliding doors are known in many different designs. They function for the purpose of hanging the sliding door on a running rail and making it laterally slideable with as little resistance as possible. The running carriages can be provided with rollers which roll along in a running rail on a cabinet, on a ceiling or as grating in a window opening, or they can be provided with sliding shoes, which slide in the running rail. Modem running carriages must be able to be attached to the sliding door and introduced into the running rail with a small time expenditure. In addition, height adjustability should be available, in order to compensate for dimensional tolerances on the sliding door and/or on the cabinet.
From U.S. Pat. No. 3,619,947 a single-piece running carriage for a grating is known, which can be installed in the corner region of the frame of the grating. The running carriage carries the weight of the grating or a sliding door on a rail lying below. For assembly of the sliding door, measures must be taken which allow the sliding door to be lifted up within the door opening, in order to be able to introduce the rollers on the lower part of the frame into the corresponding rails.
When a sliding door made in this way is improperly operated, the door can jump out of the rail by the momentum which occurs at the end during impact. An assembly of the known running carriage in a closed rail is not possible, i.e. in a rail that receives the rollers of the running carriage internally and thus prevents the rollers from jumping out of the rails.
A similar embodiment is disclosed with the running carriage in U.S. Pat. No. 3,526,995, in which the running roller can be pivoted in for inserting the sliding door into the rails lying below the sliding door. Here also, there is always the danger that the door jumps out of the rail when improperly handled. Introducing the known running carriage into a closed rail system is not possible.
BRIEF SUMMARY OF THE INVENTION
An object of the present invention is to create a running carriage of the above-described type, which allows the sliding door to be guided on a closed rail arranged above the sliding door.
This object is achieved by a running carriage for a sliding door, which includes a pair of carrying rollers arranged on a shaft or a pair of sliding shoes adapted for engagement in a running rail arranged above the sliding door and having internal running surfaces, a roller carrier by which the shaft or the pair of sliding shoes is carried, a support piece for connecting the running carriage with the sliding door, and devices for adjusting the height of the sliding door relative to the running rail, wherein the roller carrier and the support piece are connected together by a joint and their mutual angular position can be adjusted and displaced by an adjusting and displacing screw, wherein the support piece includes a cutout above its base, the cutout having a height which is the same as the thickness of a stay on the horizontal frame piece, and wherein means are constructed on the support piece for tool-free locking of the running carriage on the vertical frame piece.
The running carriage according to the invention has a very simple design. The height adjustment can be done at any time after installation. In other words, it can even be done after installation of the doors in the cabinet or a wall opening whose height can be adjusted relative to the running rail. The running carriage—in contrast to the two known running carriages of the prior art—is first of all introduced into the running rail and held there on all sides. The connection to the sliding door occurs only after the latter has been inserted into the provided opening, in which the running carriage or the two running carriages, which are necessary for a sliding door, are pushed into the end face of the frame of the sliding door. Even improper operation of the sliding door or an object disposed within the driving region of the sliding door, which exerts a force on the sliding door, cannot lift the latter out of the rail, since the rollers of the running carriage are guided within the closed rail and cannot lift out of it. The rollers and the rail cannot be contaminated.
REFERENCES:
patent: 3040391 (1962-06-01), Saunders
patent: 3283444 (1966-11-01), Andres
patent: 3526995 (1970-09-01), Saunders
patent: 3619947 (1971-11-01), Burum
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patent: 4104829 (1978-08-01), Agcaoili
patent: 4189870 (1980-02-01), Helmick
patent: 4262451 (1981-04-01), Dallaire
patent: 4805262 (1989-02-01), Marshik
patent: 4850078 (1989-07-01), Libby et al.
patent: 5161330 (1992-11-01), Auriemma
patent: 5845363 (1998-12-01), Brempell et al.
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patent: 197 09 808 A1 (1998-09-01), None
patent: 0 679 787 A1 (1995-11-01), None
patent: 2751367-A1 (1998-01-01), None
Akin Gump Strauss Hauer & Feld L.L.P.
Eku AG
Mah Chuck Y.
LandOfFree
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