U.S. patent number 3,783,864 [Application Number 04/864,592] was granted by the patent office on 1974-01-08 for ear plug.
Invention is credited to Frederik Christian Moller.
United States Patent |
3,783,864 |
Moller |
January 8, 1974 |
EAR PLUG
Abstract
The invention relates to an ear plug to be inserted into the
auditory meatus of an ear, having an exterior member of a soft
flexible material and an interior tubular member which extends
through the exterior member from one end thereof, and having
manually operable means, operatively connected with the exterior as
well as the interior member, operable to cause an expansion of the
exterior member and thereby engage the exterior member firmly
against the wall of the auditory canal.
Inventors: |
Moller; Frederik Christian
(Arhus N, DK) |
Family
ID: |
8137642 |
Appl.
No.: |
04/864,592 |
Filed: |
October 8, 1969 |
Foreign Application Priority Data
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|
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Oct 11, 1968 [DK] |
|
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4897/68 |
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Current U.S.
Class: |
128/864 |
Current CPC
Class: |
H04R
25/656 (20130101) |
Current International
Class: |
A61F
11/00 (20060101); A61f 011/02 () |
Field of
Search: |
;128/151,152 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Charles; Lawrence
Attorney, Agent or Firm: Flynn and Frishauf
Claims
I claim:
1. An ear plug to be inserted into the auditory canal of a human
ear comprising:
a tubular member (16) of a relatively stiff material and having
along at least a part of its length a screw-threaded portion
(24);
a substantially pear-shaped hollow member (10) of a relatively soft
resilient material surrounding said tubular member (16) and
extending from adjacent said screw-threaded portion of said tubular
member (16) to the end thereof, said pear-shaped hollow member
having an outwardly extending flange (20) in the portion thereof
adjacent said screw-threaded portion (24) of said tubular member
(16);
a screw-threaded nut member (26) mounted on said screw-threaded
portion of said tubular member (16) and engaging an internal
portion of said outwardly extending flange (20) for preventing
displacement of said pear-shaped hollow member (10) beyond the end
of said tubular member, such that when said nut member (26) is
threaded onto said tubular member (16), said pear-shaped hollow
member (10) is caused to deform.
2. An ear plug according to claim 1 including a washer (28)
interposed between said nut member (16) and said flange (20), said
washer (28) bearing against said internal portion of said flange
(20) in use.
3. An ear plug according to claim 1 wherein said tubular member
(16) has a flange (18) at the end thereof and said pear-shaped
hollow member (10) has an opening at the end thereof through which
said tubular member (16) extends with the flange (18) of said
tubular member bearing against the outer surface of said
pear-shaped hollow member (10).
Description
DESCRIPTION OF THE INVENTION
The present invention relates to an ear plug or ear insert adapted
to be inserted into the auditory meatus of an ear and of the type
comprising an exterior member of a soft flexible material and an
interior tubular member of relatively stiff material which is
connected with the exterior member at that end thereof which
extends into the auditory canal when the ear plug is inserted
therein.
Ear plugs of this type have been developed to avoid the necessity
of making individual ear moulds which are relatively expensive and
ear plugs of the type referred to are manufactured in a plurality
of standard sizes. It is, however, desirable that an ear plug
should fit tightly in the auditory canal and even with a plurality
of standard sizes of ear plugs of the type herein before referred
to, the individual variations of the shape and size of the auditory
canal are so numerous that only in a few cases, a perfect fit can
be obtained.
It is therefore a purpose of the invention to provide an ear plug
of increased versatility with respect to the possibilities of
obtaining a desired fit and which at the same time is a low cost
equipment.
With this and other objects in mind which will appear from the
following specification the invention will be described with
reference to the accompanying drawing which is an enlarged cross
section through an embodiment of an ear plug according to the
invention.
The ear plug illustrated has an exterior member generally referred
to by 10 with a body portion 12. The exterior portion 10 is
manufactured of a soft flexible material such as a soft synthetic
rubber-like material and the body portion 12 is in the form of a
flexible bulb having generally pear shaped configuration with an
exterior diameter which enables the member to be introduced into
the auditory canal of a human ear without any substantial
obstruction.
At the end which is introduced into the auditory canal the body
portion 12 has an aperture 14 of an interior diameter which
substantially corresponds to the exterior diameter of a tubular
member 16 of a relatively stiff material which extends through the
exterior member and terminates at the exterior end thereof remote
from the aperture 14.
At the end of the tubular member 16 which passes through the
aperture 14 the tubular member is provided with a radially
extending flange 18 which as shown in the drawing may be imbedded
in a correspondingly shaped recess at the end of the body member 12
and which serves as an abutment to prevent the end of the tubular
member 16 to be pressed through the end of the exterior member 10,
even when the exterior member is subjected to pressure in direction
of the tubular member 16.
The base or outer end 20 of the member 10 consists of a slab or
flange 20 and the entrance to the interior of the member 10 is
defined by an aperture 22 through which the tubular member 16
extends and relatively to which it can move axially.
In the embodiment illustrated, a sleeve 24 is secured on the
tubular member 16 outside the base or outer end of the exterior
member 10. The sleeve is screw-threaded at its periphery and on the
screw-threaded sleeve a screw-threaded nut 26 is provided.
Preferably, a washer 28 of a suitable material such as Teflon is
provided between the nut 26 and outer end of the exterior member
10.
The tubular member 16 extends through the screw-threaded portion
which may be secured on the tubular member by a suitable adhesive
and is in the embodiment illustrated connected with an exterior
tubular member 30 which may be adapted to connect the tubular
member 16 with an exterior source such as the outlet from a hearing
aid.
Alternatively, it will be possible to provide the exterior end of
the tubular member 16 with a stopper in the event that it is
desired to use the device according to the invention as a
protective device for preventing excessive noise to enter the
auditory canal.
In practical use, the ear plug is with the nut 26 loosened inserted
in the auditory canal and the nut is tigthened whereby the exterior
member 10 expands and enters into firm engagement with the wall of
the auditory canal.
Obviously, sound transmitted through the tubular member 16 such as
from a hearing aid will be transmitted to the auditory canal
without interference from any disturbing sound and in the event
that the entrance to the tubular member 16 is sealed, the device
serves as a protective device against excessive noise.
It will also be appreciated that compared with the individual ear
moulds the structure is inexpensive and can be produced in
individual parts according to mass production methods and be
assembled without difficulty.
Basically, the structure comprises the interior tubular member 16
of a predetermined length.
The screw-threaded portion may be integral with the interior
tubular member 16 or in the form of a separate portion secured
thereto by a suitable adhesive.
In addition thereto, the device consists of the exterior member 10
which is a prefabricated member of soft resilient material and the
only extra member is the nut 26.
This entire structure can be made available with exterior member 10
in different diameters and dimensions which are not critical and
with a few standard sizes of the exterior member 10 it will be
possible in the case of a person needing a ear plug for a hearing
aid to determine which standard size of the exterior member is most
suitable and then mount the exterior member on the rest of the
structure to give a fit of a hearing aid which is nearly as perfect
as an individual ear mould, but at a much less price.
As shown in the drawing, the configuration of the interior member
16 is arcuated, but it will be appreciated that the relatively
stiff interior portion may have any shape which is convenient for
introducing the assembled device into the auditory canal of persons
in various parts of the world depending on their characteristic
shape of the auditory canal.
* * * * *