Pivotal bearing for door frames

Details Pivotal bearing for door frames Pivotal bearing for door frames

1999-07-02

2001-03-27

Mah, Chuck Y. (Department: 3682)

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Hinge

Retractable pintle

Reexamination Certificate

active

06205616

ABSTRACT:

FIELD OF THE INVENTION
This present invention relates to a pivotal bearing for door frames; especially to a pivotal bearing suitable for use in self-assembly shelves and cabinets, which should facilitate the ease and efficiency of such assembly by users.
DESCRIPTION OF THE PRIOR ART
In the current furniture market, many shelves and cabinets require the purchasing users to perform the assembly, this is the so-called “DIY” (Do It Yourself).
For the suppliers, the DIY design tends to reduce the storage space, facilitate easy transportation, and lower the cost for assembly. In the DIY design, whether the manner of assembly, namely, the procedural steps involved in the assembly, can be easily followed by the purchasing users is an important consideration. Therefore, any improvement in making the assembly easier to accomplish not only is a high priority in the DIY design, but also can increase the efficiency of preliminary assembly at the production lines.
FIG. 1
shows a side view of the conventional pivotal bearing for door frames. The fixing portion
11
of the conventional pivotal bearing
1
is used for fixing to the door; and a protruding pivotal portion
12
, installed on top of the fixing portion
11
, acts as a pivot for the door.
FIG. 2
shows the conventional procedural steps for assembling shelves and cabinets: the top board
52
, side board
51
, and the bottom board
53
are usually jointed together via the use of tenons
511
,
512
, and the mortice
521
,
522
, and
523
. However, in assembling the cabinet door
50
installed with a pivotal bearing having a protruding pivot
12
on top, the door
50
, side board
51
, and the bottom board
53
must be jointed together before the top board
52
is to be installed in place. In installing the top board
52
, the user must aim the protruding pivot
12
of the pivotal bearing
1
, and the two tenons
511
,
512
of the side board accurately with respect to the mortice of
522
,
521
, and
523
of the top board
52
respectively to effect proper jointing, an task not easy for most users. Especially in assembling a shelve or cabinet, an user is faced with the task of jointing the two symmetrical doors with the top board by pivotal bearings, and jointing of the side boards with the top board by tenons and mortice simultaneously. The fact that the two doors are free to swing via the bearings on top of the bottom board
53
makes the insertion of the protruding pivotal portion
12
of the pivotal bearing
1
into the mortise
523
of the bottom board
52
less easy to accomplish. Furthermore, subsequent to the assembly of the shelves and cabinets, the door
50
becomes difficult to remove, because the top board
52
must be removed first, making it inconvenient for the user.
Use of the conventional pivotal bearing
1
entails the cumbersome manner of board jointings, as described above, in the assembly process. Therefore, the present invention devises an improved pivotal bearing for door frames with elastic pivot, furthering the industrial utility and practicality.
The object of the present invention is to provide a pivotal bearing for door frames with a elastic pivot.
An alternative object is to provide a pivotal bearing for door frames which facilitates the assembly of shelves and cabinets.
SUMMARY OF THE INVENTION
In view of the fact that the installation of the conventional pivotal bearings for door frames makes the assembly of shelves and cabinets cumbersome, less efficient, and the removal of door frames, once installed, difficult to accomplish, the present invention seeks to improve upon the conventional pivotal bearings, such that the fixing portion is equipped with a spring inside, so as to render elasticity to the protruding pivotal portion and facilitate ease to the assembling process. The respective boards may be jointed with one another first, then the door frames equipped with the pivotal bearings of the present invention may be installed into positions, so that the ease of assembly is increased, and the purpose and function of the DIY design fulfilled.


REFERENCES:
patent: 665603 (1901-01-01), Henry
patent: 1328874 (1920-01-01), Henault
patent: 2186789 (1940-01-01), Rosengerg
patent: 2249329 (1941-07-01), Rosengerg
patent: 2369148 (1945-02-01), Langhorst
patent: 2379528 (1945-07-01), Kelliher
patent: 4620392 (1986-11-01), Kerpers et al.
patent: 5490305 (1996-02-01), Domingo Ribot

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