Beds – Crib – Folding
Reexamination Certificate
1999-08-09
2001-11-20
Trettel, Michael F. (Department: 3628)
Beds
Crib
Folding
C005S093100, C005S098100
Reexamination Certificate
active
06317907
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to nursery apparatus and more particularly to a safety device for a collapsible playpen which can prevent the playpen from unintentional-collapse by a user.
For ease in transport, collapsible playpens are therefore available on the market. My previous disclosure of a Control Device for Folding and Expanding a Base Portion of a Playpen, U. S. Pat. No. 5,497,517 as shown in
FIG. 1
, includes four upper corners
11
, four lower corners
12
, a base portion
13
, four upper railings
14
, four drive posts
15
, having ends respectively pivoted at the lower corners
12
and the base portion
13
, four vertical stands
18
respectively secured to the upper and lower corners
11
and
12
, a pair of linking rods
16
pivoted to the four drive posts
15
, a pair of resilient strips
17
connected to the base portion
13
and the linking rods
17
and a casing
19
covering the peripheral portion of the playpen with its bottom placed over the top of the base portion
13
.
When the base portion
13
is pulled upward and the upper railings
14
are pushed downward, the four vertical stands
18
will move centripetally thereby folding the playpen into a small rectangular form.
However, if any of the upper railings
14
is inadvertently pushed downward (as shown in
FIG. 2
) by a user, the vertical stands
18
will move inward to collapse the playpen. This dangerous situation will occur because the playpen lacks a safety device.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide a safety device for a collapsible playpen which can prevent the vertical stands from collapsing inward in order to protect a child in the playpen.
Another object of the present invention is to provide a safety device for a collapsible playpen which controls the four vertical stands to move inward in a parallel fashion during collapse of the playpen.
A further object of the present invention is to provide a safety device for a collapsible playpen which allows the playpen to be collapsed quickly and easily.
Accordingly, the safety device of the present invention includes four additional reinforcement posts under the drive posts or under the upper railings or under both of the drive posts and the railings of the conventional playpen of FIG.
1
. The four additional reinforcement posts provide appropriate tension to prevent the upper portion of the vertical stands from falling inward in order to prevent the playpen from inadvertent collapse.
The present invention will be more fully understood by reference to the following detailed description thereof when read along with the attached drawings.
REFERENCES:
patent: 5485655 (1996-01-01), Wang
patent: 5611634 (1997-03-01), Wang
patent: 5867851 (1999-02-01), Mariol et al.
patent: 5911653 (1999-06-01), Cheng
patent: 6065163 (2000-05-01), Hung
patent: 6125483 (2000-10-01), Stroud et al.
Hewitt James M
Trettel Michael F.
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