Self-inflating mattress

Details Self-inflating mattress Self-inflating mattress

2000-06-14

2001-04-24

Trettel, Michael F. (Department: 3628)

Beds

Mattress

Having confined gas

C005S420000, C005S656000, C005S708000

Reexamination Certificate

active

06219868

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates in general to a self-inflating mattress to be inflated without using any additional tool.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional self-inflating mattress having a cover is shown. The inside of the cover is divided into two isolated chambers
11
,
12
, wherein the chamber
11
has a foam
13
provided inside while the chamber
12
is empty. When storing the mattress, the user squeezes air out of the foam
13
and rolls up the mattress. When using the mattress, the user spreads out the mattress roll so that the foam
13
automatically expands by absorbing outside air via the inflation valve
14
. Then, the user fills the chamber
12
with air through the inflation valve
15
by an air pump (not shown).
It is understood that the user needs to use a tool (air pump) to pump the chamber (pillow)
12
of the mattress. In other words, the user needs to always carry an air pump besides the mattress to places such as the beach, which is neither economical nor convenient for the user.
SUMMARY OF THE INVENTION
An object of the present invention is to modify the conventional self-inflating mattress so that inflating the mattress does not require any tool.
The self-inflating mattress of the present invention includes a first chamber, a second chamber, a first valve, a second valve, a foam, and a check valve. The foam is received inside the first chamber. The check valve is provided between the first chamber and the second chamber so that only air from the first chamber is allowed to flow to the second chamber. The first valve is attached to the first chamber for inflating and deflating the first chamber while the second valve is attached to the second chamber for deflating the second chamber.
To inflate the mattress, the user spreads out the mattress so that the foam inside the first chamber automatically expands by absorbing outside air via the first valve. Then, the user closes the first and the second valves and rolls up the first chamber, thereby pushing air in the foam into the second chamber via the check valve. Furthermore, the user spreads out the first chamber and re-opens the first valve so that the foam automatically expands again by absorbing outside air via the first valve. It is therefore understood that the inflation of the mattress according to the present invention does not require any tool.


REFERENCES:
patent: 5303435 (1994-04-01), Haar et al.
patent: 5564143 (1996-10-01), Pekar et al.
patent: 5630237 (1997-05-01), Ku
patent: 5632055 (1997-05-01), Graf
patent: 5898963 (1999-05-01), Larson
patent: 6038722 (2000-03-01), Giori et al.

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