Face mask for diving

Details Face mask for diving Face mask for diving

2001-02-16

2002-05-07

Calvert, John J. (Department: 3765)

Apparel

Guard or protector

For wearer's head

Reexamination Certificate

active

06381761

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to a face mask for diving.
FIG. 4
is a perspective view showing a face mask
101
for diving of prior art and
FIG. 5
is a sectional view taken along line V—V in FIG.
4
. In
FIG. 5
, chain lines indicate contours H of a diver wearing the mask
101
. The mask
101
comprises a pair of front lenses
102
, a lens frame
103
having the lenses
102
held therein, a skirt
104
extending rearward from peripheries of the lenses
102
and a head band
105
extending rearward from laterally opposite ends of the lens frame
103
. The skirt
104
is made of flexible elastic material and defines between the pair of lenses
102
a nose cover
106
projecting forward. The nose cover
106
has a pair of side walls
107
lying on both sides of a mask wearer's nose and a bottom wall
108
underlying the wearer's nares. The side walls
107
are dimensioned to be sufficiently high so that proximal ends
109
thereof come in contact with the mask wearer's face. A portion
111
of the skirt
104
contiguous to the proximal ends
109
is curved in V-shape and extends to the lenses
102
. To some degree, the nose cover
106
configured in this manner solves a problem such that the nose cover
106
is collapsed or remarkably deformed under a water pressure in the midst of diving.
However, the higher the side walls
107
the lower the rigidity of the nose cover
106
so far as the nose cover
106
also is made of flexible elastic material. In consequence, the nose cover in the face mask for diving as has been described above is still apt to be deformed under a water pressure.
SUMMARY OF THE INVENTION
It is an object of this invention to provide a face mask for diving designed so that its nose cover is effectively protected from being readily deformed.
According to this invention, there is provided a face mask for diving comprising a pair of front lenses, a lens frame adapted to hold the lenses and a head band extending rearward from laterally opposite ends of the lens frame so as to form a loop, wherein the lenses are surrounded by a pair of annular portions defined by the lens frame, respectively, the annular portions intersecting each other along upper edges thereof and extending downward from this intersecting point so as to describe a substantially inverted V-shape between the lenses and wherein the skirt defines, in this V-shaped region defined by the lens frame, a nose cover projecting forwardly of the mask.
The face mask further comprises the nose cover having a pair of side walls lying on both sides of the mask wearer's nose and a bottom wall underlying the nares of the mask wearer, the lens frame having inner and outer peripheral surfaces at least inside and outside the annular portions and inner surface and an inner surface extending between the inner and outer peripheral surfaces and confronting the face of the mask wearer and a portion of the skirt which is contiguous to respective proximal ends of the side walls being curved along the annular portions of the lens frame closely in contact with the inner peripheral surface and the inner surface.


REFERENCES:
patent: 5329643 (1994-07-01), Sato
patent: 5479917 (1996-01-01), Hsieh

Affiliated with

Also associated with

Rating

Face mask for diving does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Face mask for diving, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Face mask for diving will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2914553