U.S. patent number 3,661,225 [Application Number 05/066,926] was granted by the patent office on 1972-05-09 for ear-protecting device.
This patent grant is currently assigned to Sellstrom Manufacturing Company. Invention is credited to Marshall N. Anderson.
United States Patent |
3,661,225 |
Anderson |
May 9, 1972 |
EAR-PROTECTING DEVICE
Abstract
An ear-protecting device is provided which is adapted to protect
the wearer when disposed in an environment having a high and
disturbing noise level. The device is provided with a manually
controlled means whereby the wearer may with a simple manipulation
vary the sound resistant characteristics of the device, when
desired, to provide comfort for the wearer and/or in order to
permit the wearer to engage in conversation with another without
having to remove the device from its ear-protecting position.
Inventors: |
Anderson; Marshall N.
(Grayslake, IL) |
Assignee: |
Sellstrom Manufacturing Company
(Palatine, IL)
|
Family
ID: |
22072616 |
Appl.
No.: |
05/066,926 |
Filed: |
August 26, 1970 |
Current U.S.
Class: |
181/175; 128/866;
181/129; 128/867; 2/423 |
Current CPC
Class: |
A61F
11/14 (20130101) |
Current International
Class: |
A61F
11/00 (20060101); A61F 11/14 (20060101); G10k
011/04 (); A61f 011/02 () |
Field of
Search: |
;181/23,33 ;128/151,152
;2/209,6 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Tomsky; Stephen J.
Claims
I claim:
1. An ear-protecting device comprising an outer member of sound
resistant material; an inner member of sound resistant material,
said outer and inner members cooperating to encompass an ear of the
wearer; and adjustable means carried on the interior surface of
said outer member whereby, when in one position of adjustment, the
sound resistant characteristics of said outer member are
substantially unaffected and, when in a second position of
adjustment, the sound resistant characteristics of said outer
member are substantially diminished; said adjustable means being
biased to assume said one position of adjustment.
2. The ear-protecting device of claim 1 wherein said outer member
is provided with an opening, and said adjustable means comprises a
valve piece of sound resistant material adjustably mounted on said
outer member and, when in said one position of adjustment, closing
the outer member opening and, when manually actuated to a second
position of adjustment, uncovering said opening.
3. The ear-protecting device of claim 2 wherein said valve piece is
substantially concealed and disposed intermediate said outer and
inner members.
4. The ear-protecting device of claim 3 including a manual control
element protruding outwardly from the exterior of said outer member
and in engagement with said valve piece.
5. The ear-protecting device of claim 3 wherein said valve piece
includes a portion thereof hingedly connected to the interior
surface of said outer member and offset with respect to said outer
member opening.
6. The ear-protecting device of claim 1 wherein the outer member is
substantially cup-shaped and molded of substantially rigid plastic,
and the inner member is of soft, deformable sound absorbing
material and conforms substantially to the interior surface
configuration of said outer member; said inner member having a
portion thereof deformed by said adjustable means when the latter
is in said second position of adjustment.
7. The ear-protecting device of claim 4 including head-attaching
means adjustably connected to the exterior of said outer member,
and said manual control element is carried by said valve piece and
projects outwardly through the outer member opening.
8. The ear-protecting device of claim 4 wherein said manual control
element includes stop means engaging the exterior of said outer
member to prevent over-manipulation of said element when the latter
is manually moved to said second position of adjustment.
Description
BACKGROUND OF THE INVENTION
In many types of vocations (e.g. aircraft ground control) it is
often necessary for the personnel to be exposed to loud and
piercing noises for prolonged periods of time. Without suitable ear
protection, the person involved is subjected to substantial
discomfort and annoyance, or, in some instances, might even incur
serious and permanent damage to the ear-drum.
Various ear-protecting devices have heretofore been provided;
however, because of certain design characteristics they are beset
with one or more of the following shortcomings: (a) the devices are
uncomfortable to wear for a prolonged period of time, (b) the
devices must be removed when the wearer is conversing with another,
(c) the devices are of costly and complex construction and are
awkward to apply and remove from the ear, (d) the devices are
difficult to clean or maintain in a sanitary condition, and (e)
they are incapable of withstanding abusive handling.
SUMMARY OF THE INVENTION
Thus, it is an object of this invention to provide an
ear-protecting device which avoids all of the aforenoted
shortcomings of the prior devices.
It is a further object of this invention to provide an
ear-protecting device which is of simple, yet durable,
construction; is attractive in appearance; and is capable of
functioning under extreme climatic conditions while at the same
time insulating the ear from extreme temperature variations.
It is a still further object of this invention to provide an
ear-protecting device which is capable of readily accommodating a
wide variety of ear shapes and sizes.
Further and additional objects will appear from the description,
accompanying drawings and appended claims.
In accordance with one embodiment of this invention an
ear-protecting device is provided which comprises an outer member
substantially cup-shaped in configuration and formed of a sound
resistant material, and an inner member of sound resistant material
cooperating with the outer member so as to encompass the ear of the
wearer. The outer member is provided with a manually adjustable
means which, when in one position of adjustment, does not affect
the sound resistant characteristics of the outer member and, when
in a second position of adjustment, causes the sound resistant
characteristics of the outer member to be substantially diminished
thereby enabling sounds of certain intensity to pass to the
accommodated ear at a comfortable, audible level.
DESCRIPTION
For a more complete understanding of the invention, reference
should be made to the drawings wherein:
FIG. 1 is a perspective view of a set of ear-protecting devices,
wherein only one of the devices shown embodies the instant
invention.
FIG. 2 is a fragmentary top plan view of the device shown in FIG. 1
and embodying the instant invention.
FIG. 3 is a side elevational view of the exposed side of the device
shown in FIG. 2.
FIG. 4 is an enlarged, fragmentary sectional view taken along line
4--4 of FIG. 3.
FIGS. 5 and 6 are enlarged, fragmentary vertical sectional views of
the manual control means carried by the outer member and shown in
two positions of adjustment.
Referring now to the drawings and more particularly to FIG. 1, one
form of the improved ear-protecting device 10 is shown in
combination with a second ear-protecting device 11 which may or may
not be of like construction. The two devices 10 and 11 are
interconnected by an adjustable arcuate head band 12. Each end of
the band 12 is connected to an ear-protecting device 10 or 11. The
connections 13 between the ends of the band and the devices are
such that each device is substantially self-adjusting to the
contour of the portion of the head of the wearer circumjacent the
ear accommodated by the device. In addition, the connection permits
the band to be positioned in a normal over the top of the head
position, or around the back of the head, or under the chin of the
wearer without disturbing the positions of the devices with respect
to the ears. Various other types of connections from that shown may
be utilized without departing from the scope of the invention
herein described.
Device 10, as seen in FIG. 4, comprises a substantially cup-shaped
outer member 14 in whole or part molded of a suitable plastic (e.g.
ABS polymer) which is possessed of good sound resistant
characteristics, is durable and shock resistant, and yet, is light
weight and inexpensive. Suitable structure is provided on the
exterior of the central portion 14a of member 14 to facilitate the
connection between the end of the band 12 and exterior of the outer
member. The interior surface of the central portion 14a of member
14 is recessed from the open side 14b of the member by an amount
such that all parts of the accommodated ear will be spaced
therefrom.
The open side 14b of the member is delimited by a laterally
extending flange 15 which, in the illustrated embodiment, extends
inwardly. The flange 15 is multi-functional in that it reenforces
the edge of the member, provides a means for attaching a cushion or
pad 16 to the open side of member 14, and serves as a means for
retaining an inner member 17 in assembled relation with respect to
member 14.
The cushion 16 is preferably a soft ringlike piece which is
interposed the outer member 14 and the side of the head of the
wearer when the device is accommodating the wearer's ear. Because
of the softness, as well as the thickness of the cushion 16, the
latter is capable of conforming substantially to the contour of the
head of the wearer in contact therewith. In instances where the
wearer is required to wear eye glasses or goggles along with the
ear-protecting devices, the cushion will partially envelop a
portion of the temple which extends rearwardly from the lens frame.
Thus, cushion 16 seals against the sound waves passing between the
outer member and the head of the wearer. The composition of the
cushion 16 is such that in addition to providing a sound barrier,
it serves as an insulator against heat and cold.
The cushion is provided with a skirt 16a which overlies and
resiliently engages a portion of the exterior of member 14 and
thus, holds the cushion 16 in place on the open side 14b. The
center opening 16b of the cushion provides an entry for the ear
into a pocket P formed by the inner member 17. While the cushion 16
is shown as being removably mounted on the open side of the outer
member 14, it may, if desired, be adhesively affixed to the flange
15. It is preferred, however, that the cushion be removably mounted
so that it may be replaced when worn or when in need of
cleaning.
The inner member 17 is preferably formed from a sheet of soft,
pliable, yet resilient, sound absorbing material (e.g.
polyurethane) which is adapted to be inserted through the open side
14b into the interior of member 14. Because of the pliable,
resilient character of the member 17, it will readily conform to
the interior surface configuration of member 14 and define the
ear-accommodating pocket P.
The flange 15 serves to hold member 17 in assembled relation within
the member 14 without requiring the use of an adhesive. Thus, when
required, the inner member 17 may be readily removed from member 14
for cleaning or replacement.
As noted, in FIGS. 3-6, outer member 14 of device 10 is provided
with a first hold 18 and a smaller second hold 20. In lieu of two
holes, a single hole, not shown, may be provided. Closing or
uncovering of holes 18 and 20 is controlled by a valve piece 21
having an elongated tail-like portion 21a, which is secured by a
rivet 21b or the like to member 14. Piece 21 is formed of
relatively stiff, yet resilient material and has secured to the
side thereof adjacent member 14 a pad 29 of soft, sound absorptive
material (e.g. neoprene). Piece 21 is disposed on the interior
surface of member 14 and because of the resilient character of the
piece itself and that of the inner member 17, the piece is biased
so as to normally assume a closed position I, as seen in FIG. 5.
When piece 21 is in position I, the pad 29 closes off both holes 18
and 20 of member 14 so that the sound resistant characteristics of
member 14 are substantially unaffected. Thus, outer member 14 and
inner member 17 combine to provide an effective sound barrier,
thereby providing comfort to the wearer even when disposed in a
very noisy environment. When valve piece 21 is manually adjusted to
position II, wherein holes 18 and 20 are uncovered, the sound
resistant characteristics of member 14 are materially reduced
thereby enabling comfortable audible sounds to reach the
accommodated ear. Thus, by merely pressing inwardly the valve piece
21, the wearer can carry on a conversation without removing the
devices from his ears. Usually it is only necessary to have only
one device provided with a valve piece; however, if desired, both
devices 10 and 11 can be equipped therewith.
To facilitate depressing of valve piece 21, a substantially
T-shaped button 22 is provided. The leg 22a of the button extends
through opening 18 and is secured to valve piece 21. A suitable
opening is formed in pad 29 through which leg 22a extends. The head
22b of the button is enlarged and a portion thereof substantially
overlies hole 20 and a portion of hole 18. Thus, by reason of the
enlarged head configuration of the button 22, the latter, when
depressed, will engage the portion of member 14 intermediate holes
18 and 20 and prevent over-depressing of the valve piece. The
exterior of the button head is shaped and sized so that it may be
readily contacted by a finger F. As aforementioned, only a single
opening may be formed in member 14 in place of the pair of openings
shown without departing from the scope of the invention. Likewise,
in place of the hingedly mounted valve piece 21, the latter could
be pivotally mounted on the member 14 so that, upon pivoting piece
21 in one direction, the opening, or openings would be uncovered,
and when pivoted in the opposite direction, the piece 21 would
assume a closed position.
The shape, size, and location of the opening and complemental valve
piece, as well as the shape and size of the outer member 14 may
vary from that shown without departing from the scope of the
invention:
* * * * *