Protective mask
OwnerShih-Huang Hsuinventor
Life of this patent
Estimating the term…
Abstract
A protective mask includes a main frame body made of magnesium alloy and having an imaginary vertical central line. The main frame body has a plurality of first rods arranged along the central line, a plurality of second rods, and at least one first protrusion. Each of the first rods has spaced-apart first front and rear surfaces, and two opposite first connecting surfaces interconnecting the first front and rear surfaces. A thickness between the first front and rear surfaces is larger than a thickness between the first connecting surfaces. Each of the second rods is connected between two adjacent ones of the first rods. The first protrusion protrudes from the first front surface of one of the first rods.
Claims8
A protective mask comprising a main frame body that is made of magnesium alloy, that is molded as one piece, and that has an imaginary vertical central line, said main frame body having:
- a plurality of spaced-apart first rods arranged along the central line, each of said first rods having a first front surface,
- a first rear surface that is spaced apart from said first front surface in a front-rear direction, and two opposite first connecting surfaces that interconnect said first front surface and said first rear surface, a thickness between said first front surface and said first rear surface being larger than a thickness between said first connecting surfaces;
- a plurality of second rods, each of which is connected between two adjacent ones of said first rods;
- and
- at least one first protrusion protruding from said first front surface of one of said first rod;
- said first protrusion having:
- a first protruding portion proximate to the central line of said main frame body;
- and
- two opposite first inclined surfaces located respectively at two opposite sides of said first protruding portion, each of said first inclined surfaces extending slantingly from said first protruding portion toward said first front surface of a corresponding one of said first rods;
- said main frame body having a plurality of said first protrusions, each of which is disposed on a respective one of said first rods;
- and
- said first protruding portion of each of said first protrusions substantially positioned on the central line of said main frame body;
- said main frame body further having a plurality of second protrusions, each of which is positioned at a junction between a corresponding one of said first rods and two corresponding ones of said second rods;
- and
- each of said second protrusions having:
- a second protruding portion protruding forwardly;
- and
- a plurality of second inclined surfaces located respectively at two opposite sides of said second protruding portion, each of said second inclined surfaces extending to one of a corresponding one of said first rods and a corresponding one of said second rods.
Dependencies are inferred from the claim text.