One-way valve on diving mask

Details One-way valve on diving mask One-way valve on diving mask

2004-04-13

2004-12-28

Bennett, Henry (Department: 3743)

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

C128S201280, C002S428000

Reexamination Certificate

active

06834649

ABSTRACT:

BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to an improved one-way valve incorporating on a diving mask, which prevents water from coming inside and can be blown open to drain water out of the diving mask.
(b) Description of the Prior Art
Referring to
FIGS. 1 and 2
. To drain water leaking inside a diving mask, due to water pressure and an individual's face shape not completely matching the diving mask, a conventional diving mask
10
may be fitted on the nose position with a one-way valve
100
comprising a soft valve plate
102
on a hard plastic valve seat
101
, wherein an astro-fixture
1011
formed on top. Fitting the one-way valve
100
on the diving mask
10
, water drained from the diving mask
10
will be blocked mostly by the astro-fixture
1011
and the valve seat
101
, thereby forming a retro-flow, which creates additional efforts in blowing water out of the diving mask
10
.
SUMMARY OF THE INVENTION
The invention relates to a one-way valve incorporated under a nose cover of a diving mask. The one-way valve thereof can be blown open to drain water, without being blocked, out of the diving mask.
To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.


REFERENCES:
patent: 4856120 (1989-08-01), Hart
patent: 5329643 (1994-07-01), Sato
patent: 5608920 (1997-03-01), Oliver et al.
patent: 5687712 (1997-11-01), Semeia
patent: 5724961 (1998-03-01), Tistrand
patent: 6598239 (2003-07-01), Hsieh

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