Chairs and seats – Collapsible chair; i.e. – relatively folding bottom – back,... – Collapsed to a compact bundle having all rigid elongated...
Reexamination Certificate
2000-01-12
2001-05-29
Brown, Peter R. (Department: 3624)
Chairs and seats
Collapsible chair; i.e., relatively folding bottom, back,...
Collapsed to a compact bundle having all rigid elongated...
C297S045000
Reexamination Certificate
active
06237993
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates to a frame of a beach chair, and more particularly to a foldable beach chair frame with an inclined back frame which is facilitated to be folded into a compact unit for storage and carriage.
2. Description of Related Arts
The distinctive feature of a beach chair is its low height. Normally, a beach chair merely has half the height of a normal chair.
FIG. 1A
illustrates a conventional folding chair. If its height is reduced to a half, the angle between each of the inclined legs with the ground must be reduced to a half too, that will damage its supporting structure to largely decrease the supporting ability thereof while maintaining the same width of the folding chair. In other words, the cross tube structure of the conventional folding chair, as shown in
FIG. 1A
, limits the height of the chair.
Therefore, due to the low height requirement of the beach chair, as shown in
FIGS. 2A and 2B
, the common foldable beach chair comprises a chair seat A
2
which is made of durable fabric and a chair frame A
1
which is constructed by a set of metal tubes. The chair frame A
1
for supporting the chair seat A
2
comprises a seat frame section A
12
, a back frame section A
13
pivotally mounted to the seat frame section A
12
, a leg frame section A
14
for supporting the seat frame section A
12
pivotally mounted underneath the seat frame section A
12
, and a pair of pivotal arms A
15
each pivotally connecting between the seat frame section A
12
and the back frame section A
13
. In order to fold the conventional foldable beach chair, fold the back frame section A
13
toward the seat frame section A
12
by rotating the pivotal arms A
15
outwardly and fold the leg frame section A
14
underneath and into the seat frame section A
12
. The folded beach chair is bulky and difficult to carry because the size of the beach chair is limited by its seat frame section A
12
. Also, the beach chair is usually heavy since the chair frame A
1
must be constructed sturdily in order to support a user's weight.
SUMMARY OF THE INVENTION
A main object of the present invention is to provide a foldable frame for beach chair, which provides a low height strong frame structure that can well support the user's weight of the user.
Another object of the present invention is to provide a foldable frame for beach chair, which comprises an inclined back frame structure to enable the user's back to comfortably lie on the beach chair.
Another object of the present invention is to provide a foldable frame for beach chair, which has a simple construction that every individual is able to fold and unfold the beach chair in one single motion.
Another object of the present invention is to provide a foldable frame for beach chair, which is adapted for being folded into a compact unit for easily storage and carriage.
Accordingly, in order to accomplish the above objects, the present invention provides a foldable frame for beach chair, which comprises a seat frame and a back frame foldably coupled with the seat frame, wherein the seat frame comprises:
a pair of front frame legs pivotally connected with each other in cross manner to form a “X” structure;
a pair of back frame legs pivotally connected with each other in cross manner to form a “X” structure
two pairs of side frame legs, wherein each pair of side frame legs are pivotally connected with each other in cross manner to form a “X” structure;
a pair of front lower frame joints for pivotally connecting two lower ends of the two front frame legs with two lower front ends of the side frame legs respectively;
a pair of back lower frame joints for pivotally connecting two lower ends of the two back frame legs with two lower back ends of the side frame legs respectively;
a pair of front upper frame joints for pivotally connecting two upper ends of the two front frame legs with two upper front ends of the side frame legs respectively;
a pair of back upper frame joints for pivotally connecting two upper ends of the two back frame legs with two upper back ends of the side frame legs respectively; and
a pair of foldable supporting arms each having a pivot end pivotally connected with one of the two crossed side frame legs of the respective pair of side frame legs in such a manner that a supporting end of each of the supporting arms is extended to bias against the other side frame legs of the respective pair of side frame legs when the foldable frame is unfolded to stretch out.
REFERENCES:
patent: 467340 (1892-01-01), Chichester
patent: 2625207 (1953-01-01), Duke
patent: 2691410 (1954-10-01), Boucher
patent: 5499857 (1996-03-01), Lynch, Jr.
patent: 2532535 (1984-03-01), None
Brown Peter R.
Chan Raymond Y.
David and Raymond Patent Group
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