U.S. patent number 3,911,914 [Application Number 05/477,093] was granted by the patent office on 1975-10-14 for ventilated head cover and safety hood.
Invention is credited to Sven-Olof Gustav Johansson.
United States Patent |
3,911,914 |
Johansson |
October 14, 1975 |
Ventilated head cover and safety hood
Abstract
A ventilated head cover having a rigid shell with insulation
therein designed to retain cool air and to reduce noises from
outside of the shell and having removably mounted insulation
designed to reduce outside sounds and the sound from the air flow
inside of the shell; said head cover being provided with a
transparent, removably mounted eye shield and a removably mounted
flexible neck collar designed to prevent entrance of gases from the
outside, but permitting discharge of air from the inside of the
head cover. Means are provided for the entrance of a controlled
volume of clean air to keep the head of the user cool, and to
maintain the eye shield clean, as well as to furnish air for the
user to breathe, and to prevent entrance of gases from the outside,
and the structure of the head cover being further designed to
permit free movement of the head in the cover.
Inventors: |
Johansson; Sven-Olof Gustav
(Houston, TX) |
Family
ID: |
23894513 |
Appl.
No.: |
05/477,093 |
Filed: |
June 6, 1974 |
Current U.S.
Class: |
128/201.23;
2/2.5; 2/424 |
Current CPC
Class: |
A62B
18/04 (20130101) |
Current International
Class: |
A62B
18/04 (20060101); A62B 18/00 (20060101); A62B
018/04 () |
Field of
Search: |
;128/142.7,142.6,142.5,142,146.7,146,145R,142.3 ;2/2.5,3R,7,6
;62/259 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Recla; Henry J.
Attorney, Agent or Firm: Wyatt; Ranseler O.
Claims
What I claim is:
1. A ventilated hood having a rigid shell, said shell having a
shield opening, a transparent shield releasably mounted over said
shield opening, said shell having a user receiving opening, a
flexible collar mounted on said shell, adjacent said receiving
opening and an air conduit having a plurality of discharge ports
mounted in said shell, said conduit having an entry at one end and
extending from a point above the longitudinal center of the hood
and over the inside top of the hood terminating at a point
diametrically opposed to the entry point, an air connection in said
shell extending transversely through one wall, said connection
being movable into flow connection with the entry end of said
conduit and a source of supply of air under pressure, a pair of
flexible bands are stretched over and mounted on said shell, the
margins of said bands adjacent said shell positioned over a portion
of said shield adjacent the outer margins thereof to maintain said
shield tightly against said shell and in said sealed relation with
said shell.
2. A ventilated hood having a rigid shell, said shell having a
shield opening, a transparent shield releasably mounted over said
shield opening, said shell having a receiving opening, a flexible
collar mounted on said shell adjacent said receiving opening and an
air conduit having a plurality of discharge ports mounted in said
shell, said conduit having an entry at one end and extending from a
point above the longitudinal center of the shell and over the
inside top of the shell, terminating at a point diametrically
opposed to the entry point, an air connection in said shell
extending transversely through one wall, said connection being
movable into flow connection with the entry end of said conduit and
a source of supply of air under pressure said shell being
cylindrical, the top thereof being domed and closed and the bottom
thereof being open and said shell provided with a cork insulation
on its side walls and a cool air retaining insulation on the inside
top wall, said air conduit being mounted between said cork and cool
air retaining insulation, said insulation pads being loosely
mounted in said shell said collar including means for maintaining
said cork and air cooling insulation in said shell thereby forming
a sound barrier between said air conduit and the inside of said
shell.
3. A ventilated hood having a rigid shell, said shell having a
shield opening, a transparent shield releasably mounted over said
shield opening, said shell having a receiving opening, a flexible
collar mounted on said shell adjacent said receiving opening and an
air conduit having a plurality of discharge ports mounted in said
shell, said conduit having an entry at one end and extending from a
point above the longitudinal center of the shell and over the
inside top of the shell, terminating at a point diametrically
opposed to the entry point, an air connection in said shell
extending transversely through one wall, said connection being
movable into flow connection with the entry end of said conduit and
a source of supply of air under pressure, insulation pads are
loosely mounted in the shell, said collar including means for
maintaining said insulation pads in said shell, and a skirt is
mounted on the lower margin of said shell, and said collar, shield
and skirt are maintained detachably mounted on said shell by a pair
of flexible bands stretched over said shell having their respective
margins movable over and off of the margins of said collar, shield
and skirt, to move same into and out of holding position.
Description
BACKGROUND OF THE INVENTION
In sand blasting, painting and cleaning tanks, and the like, it is
necessary for the workers to wear head covers to protect the user
from flying objects, and to filter out any dust, sand or gas in the
area. In these close quarters, the temperatures sometimes reach
100.degree. F., and greater, and noxious gases are commonly
present. Head covers presently employed for this purpose are of
excessive weight and the structure limits movement of the head and
blocks peripherial vision, and, in many instances, are not of
sufficient rigidity to protect the user from the hazards
encountered in such work. It is an object of the invention to
provide a head cover that is a safety hood, guarding against flying
objects, and which is a comfortable, cooled head gear, protecting
the user against the debris incident to the work of sand blasting
and against the noxious gases invariably present in such areas.
It is another object of the invention to provide a head cover that
may be worn for long periods of time, with comfort, and that is
composed of parts that may be quickly and easily disassembled and
cleaned, or replaced.
SUMMARY OF THE INVENTION
A head cover and safety hood having a rigid shell insulated to
retain cool air and to block outside noises, having readily
removable insulation pads and a transparent eye-piece, an elastic
neck collar and a depending skirt, held in place on the cover by
means of yieldable bands, and having means for admitting a
controlled volume of clean air into the interior of the hood.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is an elevational view of a user, with the head cover in
place.
FIG. 2 is an exploded view of the component parts of the head
cover.
FIG. 3 is a side elevational view of the assembled head cover.
FIG. 4 is a cross sectional view of the head cover, illustrating
the composition of the head cover and the air conduit and discharge
openings.
FIG. 5 is an enlarged side elevational view, partially in cross
section, with all parts in assembled position.
FIG. 6 is a side elevational view, illustrating the method of
releasably mounting the eye-piece on the head cover, and
FIG. 7 is a front elevational view, illustrating the flexible neck
collar in position on the head cover.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In the drawings, the numeral 1 designates the shell forming the
helmet, which is prefereably formed of a suitable rigid lightweight
material, such as fiber glass, molded into a cylindrical shape with
an opening 2, in which the transparent shield 3 is mounted,
providing an eyepiece through which the user may see to do his
work. Side supports 4, 4 are secured to the shell on each side of
the shield opening 2, such as by means of the rivits 5, 5. The
shield 3 fits over the opening 2 and the side margins thereof fit
between the outer portion of the supports 4, 4 and the body of the
helmet shell 1. Flexible bands, as 6, 7, are anchored to the shell
1 and the margins of the bands 6, 7 adjacent the eye piece opening
2, are free, so that it may be rolled back, as illustrated in FIG.
6, to permit the upper and lower margins of the shield 3 to fit
against the shell 1 in position over the shield opening 2, and the
rolled portion of the flexible bands 6, 7 are then rolled back to
the position shown in FIG. 3, maintaining the shield in position
over the opening 2.
A lining of cork, as 8, is secured to the inside vertical walls of
the shell 1, and the domed top of the shell 1 has its inside wall
covered with a suitable insulation 9 of a nature that will maintain
the cool air in the manner a sponge maintains water, such as the
product sold under the name Armaflex, which is permanently mounted
in the shell, and an air conduit 10 extends from one side of the
shell, on the inside wall, over the cork and top insulation, and
follows the inside contour of the shell to a point on the opposite
side in horizontal alignment with the entrance connection 11, which
extends through the side wall of the shell 1.
A hanger ring 12 is mounted in the top of the shell 1, to provide
means for suspending the shell from a hook when not in use. A pad
of insulation material, such as urethane foam, 13, shaped to fit
the inside contours of the shell 1, are loosely mounted therein,
over the cork insulation 8, and over the air inlet conduit 10.
Discharge ports in the conduit 10, as 14, 14, are shown extending
from one end of the conduit to the other, in spaced relation,
positioned to discharge air outwardly from each side of the conduit
10. These openings will be formed in the conduit 10 from a point
just above the point of location of the left ear of the user, and
will terminate just above the right ear, so that no discharge will
be opposite either ear.
Mounted on the bottom of the shell 1, is the flexible neck collar
15, which is formed of suitable elastic material, the outside
margin of which is stretched tightly over the bottom margin of the
shell 1, and the lower portion of the band 7 is rolled up for this
installation, and when the skirt is in place, the band 7 is rolled
back down, extending over the collar and skirt, to aid in
maintaining the collar and skirt in place. The skirt 16 is formed
of a suitable fabric, which is shaped to extend over the shoulders
and the chest and back of the user, and the upper margin is
stretched over the lower margin of the shell 1 and collar 15.
An air hose 17 extends from the connection 11 to the belt of the
user 18, and an air conditioner, as 19, for separating hot and cold
air, of conventional structure, is mounted on the belt of the user
and receives the hose 17, and a hose 20 extends from the air
conditioner 19 to a source of supply (not shown) of air, under
pressure. A valve on the air conditioner 19 permits manual
adjustment of the air flow into the shell 1.
In use, the user places the shell over his head, and the top
thereof rests on the top of the user's head, and the entire shell
moves with the movement of the head, providing full vision at all
times, and the shield 3 is of sufficient width to permit an
extended peripheral field of vision. The air introduced into the
shell 1 through the hose 17 is a continuous flow, and will pass out
of the shell through the collar 15. The circulation of the air
through the cover keeps the shield 3 free of condensation, and the
collar 15 and movement of air through the collar 15, keeps outside
gases from entering the head cover. The insulation on the top of
the shell absorbs and retains cool air, keeping the head of the
user cool and comfortable. Thus, regardless of the gas and debris
in the ambient atmosphere, or the temperature therein, the head of
the user will remain cool, comfortable and free of contamination
from the outside, and the head of the user will be protected
against impact of flying objects incident to the nature of the work
of sandblasting, and the like, with the additional advantage of
insulation against the noise created by this type of work, and of a
head cover having means for securing the component parts in place
which will enable the user to readily remove the pads 13, collar
15, shield 3 and the skirt 16 for cleaning or replacement.
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