Horizontally supported planar surfaces – Folding – Legs fold axially parallel to surface edges
Reexamination Certificate
2001-11-13
2003-10-21
Mai, Lanna (Department: 3636)
Horizontally supported planar surfaces
Folding
Legs fold axially parallel to surface edges
C108S115000, C248S188600
Reexamination Certificate
active
06634304
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a collapsible table, particularly to one capable to spread and collapse with convenience, and quite stable for use in case of spreading out.
A known convention collapsible table shown in
FIG. 8
includes a feet unit
21
collapsible and having four feet
22
of the same length, an upper base
23
combined respectively with an upper end of each foot
22
, a bottom cover
24
fitted around the bottom of each foot
22
to contact the ground. A slidable sleeve
25
is fitted movably around each foot
22
, two pairs of spreading members
26
consist of a spreading rod
261
respectively and pivotally connected between one slidable sleeve
25
and upper ends of two opposite feet
22
and a connect rod
262
connected between the two opposite slidable sleeve
25
. Further, two horizontal upper rods
27
are provided respectively between the upper ends of two pars of feet
22
, and a hook
231
is fixed on the upper base
23
. Further, a table board
28
consisting of a plurality of narrow boards
281
is provided to be placed on the two upper rods
27
with holes
282
provided on an outermost narrow board
281
engaging the hooks
231
to stabilize the table board on the feet unit
21
.
In case that the conventional collapsible table is to be used, the slidable sleeves
25
on the feet
22
are moved with the spreading members
26
spreading from a collapsed condition to a spread condition, with the horizontal rods
27
becoming horizontal between the two upper bases
23
, with the table board
28
placed stably on the feet unit
21
by means of the hooks
231
engaging the holes
282
. Then the collapsible table is spread completely for use. If the spread table is to be collapsed, first the table board is removed from the feet unit
21
, and then pull up one end of the horizontal rods
27
to force it vertically located beside one of the feet
22
, and then the connect rods
262
is rotated with the spreading rods
261
as a fulcrum, so the slidable sleeves
25
gradually moving down along the feet
22
until the slidable sleeves
25
reach the bottom cover
24
in the collapsed condition.
Although the conventional collapsible table can be collapsed to become a small capacity for a user to easily carry out for use, it has the following disadvantages.
1. Spreading width of the feet unit have to be slowly adjusted for engaging the holes and the holes for placing the table board on the feet unit, extremely inconvenient for handling for too many points for engaging and for lack of stopping means of the slidable sleeves.
2. The feet unit is liable to sway, swing or be collided by something before it is spread stably for placing the table board for lack of stopping means of the slidable sleeves.
3. The dimensions of the table board is limited, impossible to supply a larger space for use, because the feet are spread and collapsed by means of the spreading members having their length restricted and moving height of the slidable sleeves also restricted.
4. Its structure is limited by the height of the feet, so its spread dimensions are not large. Subsequently, when any edge of the table board receives too large shock, its center of gravity may be unstable, and if worse, the table may fall down.
SUMMARY OF THE INVENTION
The main objective of the invention is to offer a collapsible table mainly including a feet unit consisting of two horizontal rods and four feet respectively having an upper end pivotally connected to one of the two ends of each horizontal rod, spreading members respectively pivotally provided between two feet, each spreading member having plural connect strips pivotally connected with each other. Each foot is possible to be swing up to become parallel to the horizontal rod, having a slidable sleeve fitted movably around and a position limit ring fixed around between the slidable sleeve and the upper end. Further, a guide rod is pivotally connected between each slidable sleeve and the horizontal rod. The spreading members move the slidable sleeves upward along each foot, which is then spread down to become vertical to the horizontal rod, with the slidable sleeves stopped by the position limit rings. Then the collapsible table in the invention is spread out fully for use, with a table board placed on the feet unit, needing no more adjustment.
Another objective of the invention is to offer a collapsible table, in which each position limit ring has a projecting member, and each slidable sleeve has an engage member to engage the projecting member in case of spreading the feet unit, keeping stably the feet unit by means of engagement of the projecting member and the engage member, without possibility of collapsing randomly or falling down.
REFERENCES:
patent: 960281 (1910-06-01), De Moss
patent: 1132061 (1915-03-01), Backer
patent: 1369943 (1921-03-01), Springer
patent: 1854248 (1932-04-01), Cairney
patent: 2077541 (1937-04-01), Wieslander
patent: 2412395 (1946-12-01), Goosmann
patent: 4341164 (1982-07-01), Johnson
patent: 4579229 (1986-04-01), Porcaro et al.
patent: 5794546 (1998-08-01), Carter
patent: 5865127 (1999-02-01), Carter
patent: 6073894 (2000-06-01), Chen
patent: 6158361 (2000-12-01), Zheng et al.
patent: 2120539 (1983-12-01), None
patent: 06237823 (1994-08-01), None
Mai Lanna
Rosenberg , Klein & Lee
Tran Hanh V.
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