U.S. patent number 3,686,691 [Application Number 05/066,927] was granted by the patent office on 1972-08-29 for ear-protecting device.
This patent grant is currently assigned to Sellstrom Manufacturing company. Invention is credited to Marshall N. Anderson.
United States Patent |
3,686,691 |
Anderson |
August 29, 1972 |
EAR-PROTECTING DEVICE
Abstract
An ear-protecting device is provided which is mounted so as to
be substantially self-adjusting and thus, conform substantially to
the portion of the head of the wearer which is circumjacent the
accommodated ear. The device includes a supporting arm and an
ear-acommodating unit which is connected thereto and is adjustable
about a plurality of angularly disposed axes.
Inventors: |
Anderson; Marshall N.
(Grayslake, IL) |
Assignee: |
Sellstrom Manufacturing company
(Palatine, IL)
|
Family
ID: |
22072623 |
Appl.
No.: |
05/066,927 |
Filed: |
August 26, 1970 |
Current U.S.
Class: |
2/209 |
Current CPC
Class: |
A61F
11/14 (20130101) |
Current International
Class: |
A61F
11/00 (20060101); A61F 11/14 (20060101); A41d
021/00 () |
Field of
Search: |
;2/209,3,174
;179/114,156,182R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Franklin; Jordan
Assistant Examiner: Krizmanich; George H.
Claims
I claim:
1. An ear-protecting device comprising an elongated supporting arm
having one end thereof adapted to be disposed in proximity to an
ear of the wearer of said device, and a substantially
self-adjusting ear-accommodating unit; said unit including an outer
casing having an open side through which the ear of the wearer
passes when said device is worn and a first complemental connector
means disposed on the exterior of said casing opposite said open
side, a second complemental connector means engaging said first
connector means and mounted for rotation only with respect thereto
about a fixed first axis disposed substantially perpendicular to
the open side of said casing, said second complemental connector
means being mounted on said supporting arm for limited pivotal
movement about a fixed second axis; said first and second axes
being transversely disposed relative to one another.
2. The ear-protecting device of claim 1 wherein said elongated
supporting arm comprises an inner section and an outer section;
said sections being interconnected for relative pivotal movement
about a third axis; said outer section being connected to said
second complemental connector means; said third axis being
angularly disposed relative to said first and second axes and in
non-intersecting relation with respect to at least said second
axis.
3. The ear-protecting device of claim 2 wherein the outer section
of said supporting arm terminates in a fork having tines with the
ends thereof pivotally connected to the second complemental
connector means of said ear-accommodating unit, said pivotal
connection defining said second axis.
4. The ear-protecting device of claim 3 wherein the outer section
of said supporting arm is provided with stop means engageable with
said second complemental connector means for limiting pivotal
movement thereof about said second axis to a predetermined sector;
said stop means comprising a lug projecting from the juncture of
the tines of said fork and movable within a slot formed in said
second complemental connector means.
5. The ear-protecting device of claim 1 wherein said supporting arm
carries stop means cooperating with said unit for restricting
pivotal movement of the latter about said second axis to a
predetermined sector.
6. The ear-protecting device of claim 1 wherein an elongated
supporting arm is provided at each end of a head-engaging band and
a substantially self-adjusting ear-accommodating unit of like
construction is connected to each supporting arm.
7. The ear-protecting device of claim 1 wherein said first
complemental connector means includes a protuberance formed on the
exterior of said casing opposite the open side of said casing, said
protuberance having an annular periphery and an axially disposed
opening formed therein; said second complemental connector means
includes a socketlike element encompassing said protuberance, said
socketlike element being provided with an opening coincident to
said protuberance opening, and fastener means disposed within said
coincident openings for retaining said complemental connector means
in assembled relation; said fastener means defining said first
axis.
Description
BACKGROUND OF THE INVENTION
Various ear-protecting devices for use in protecting the ears of
the wearer against excessive noises, extreme temperature variations
and the like have heretofore been provided, but due to certain
design characteristics are beset with one or more of the following
shortcomings (a) the device is not self-adjusting and thus, is
uncomfortable to wear and reduces the effectiveness of the
protection afforded the ear, (b) the device is of complex and
costly construction, and (c) the device is of bulky construction
and is awkward to wear with a cap, helmet or the like.
SUMMARY OF THE INVENTION
Thus, it is an object of this invention to provide an
ear-protecting device which is self-adjusting, is of simple, yet
sturdy construction, and is comfortable to wear whether worn with
or without a cap, helmet or the like.
It is a further object of this invention to provide an
ear-protecting device which is easy to apply to or remove from the
ear of the wearer and yet, when in an ear-accommodating position,
will remain in place notwithstanding that the wearer engages in
vigorous physical activity.
Further and additional objects will appear from the description,
accompanying drawings, and appended claims.
In accordance with one embodiment of the invention, an
ear-protecting device is provided which includes an elongated
supporting arm having the outer end thereof terminating in
proximity to the ear of the wearer and a substantially
self-adjusting ear-accommodating unit connected to the outer end of
the arm. The unit comprises an outer casing provided with first and
second complemental connector means, which are mounted together so
that one complemental connector means may rotate relative to the
other about a first axis. The second complemental connector means
is mounted on the outer end of the supporting arm for limited
pivotal movement about a second axis which is angularly disposed
with respect to the first axis. The supporting arm is formed of
sections which are connected to one another for limited pivotal
movement about a third axis which is angularly disposed to the
first and second axes.
DESCRIPTION
For more complete understanding of the invention reference should
be made to the drawings wherein:
FIG. 1 is a perspective view of one form of the improved
ear-protecting device.
FIG. 2 is a fragmentary perspective top view of the device shown in
FIG. 1.
FIG. 3 is an enlarged fragmentary end view of one of the
ear-accommodating units shown in FIG. 1 with the supporting arm
therefor shown in broken lines in various positions of rotational
adjustments about the first axis.
FIG. 4 is a side elevational view of the unit of FIG. 3 and with
the unit shown in broken lines in a position of pivotal adjustment
about the second axis.
FIG. 5 is an enlarged fragmentary top view of the supporting arm
sections, and with the sections shown in broken lines in a position
of pivotal adjustment about the third axis.
FIG. 6 is a fragmentary side elevational view partially in section
of one of the supporting arm sections.
FIG. 7 is an enlarged fragmentary sectional view taken along line
7--7 of FIG. 3.
Referring now to the drawings and more particularly to FIG. 1, one
form of the improved ear-protecting device 10 is shown which
includes a pair of ear-accommodating devices 11 and 12 connected to
elongated supporting arms 13 and 14 respectively; the latter
forming a part of a head-engaging band 15. The central portion 16
of the band 15 is curved and adjustable longitudinally so as to fit
the head of the wearer. The mechanism for effecting longitudinal
adjustment is of conventional design and encased in a soft
rubberlike sleeve 17. The central portion 16 and supporting arms 13
and 14 are preferably formed from a strap of spring metal or
plastic.
Each supporting arm 13 or 14 comprises an inner section 13a or 14a
and an outer section 13b or 14b. The inner section is preferably
made integral with the end of the central portion 16 and extends
laterally outwardly and slightly downwardly therefrom, see FIG. 4.
The outer or distal end of the inner section is pivotally connected
to the adjacent end of the outer section 13b or 14b by a pin or
rivet 18. The axis of rivet 18 defines an axis X--X, see FIG. 4.
The inner section 13a or 14a in each case is provided with a pair
of laterally spaced protuberances 20a and b which are adapted to
engage the end of the outer section and limit the relative pivotal
movement thereof to a predetermined sector I, see FIG. 5.
The outer or distal end of each outer arm section 13b or 14b is
shaped like a fork F with the tines or legs F.sub.1 thereof
spreading divergently and arcuately outwardly and having the outer
ends F.sub.2 thereof offset inwardly towards each other so as to
define a second axis Y--Y, see FIG. 3. The offset ends F.sub.2 are
adapted to be disposed in suitable sockets S formed in each unit 11
and 12.
Each unit 11 and 12 is preferably of like construction and
comprises an outer casing 21 of substantially cup-shaped
configuration. The interior of the casing 21 may be provided with a
suitable liner 22 of sound absorbing and/or insulating material.
The open side of the casing is preferably delimited by a soft,
spongelike ring 23 which is adapted to engage the side of the head
of the wearer circumjacent the wearer's ear which is accommodated
by the unit. The ring 23 is carried by the casing. The opening of
the ring 23 is sized so as to permit the ear to readily pass
therethrough when the unit 11 or 12 is applied to or removed from
the ear. The liner 22 and the interior of the casing 21 are shaped
so as to form a suitable pocket in which the wearer's ear is
disposed when the unit is in place.
The outer casing 21 is preferably of molded plastic (e.g. ABS
polymer) which is hard, shock-resistant, and is possessed of a high
sound resistance characteristic. At approximately the center of the
exterior of casing 21 is formed an annular protuberance 24, see
FIG. 7, which functions as a first complemental connector means.
The outer face 24a of the protuberance is flat and is provided with
an opening 25, the inner end of which terminates at a recessed
annular flat surface 24b, see FIG. 7. The surface 24b is adapted to
accommodate a washer W, see FIG. 7, the function of which will be
described more fully hereinafter.
Overlying and accommodating the protuberance 24 is a socket piece
26. The piece 26, as shown in FIG. 7, is provided with an inner
section 26a and an outer section 26b. Section 26a is provided with
a recessed pocket 26c which is adapted to receive the exterior of
protuberance 24. The fit between pocket 26c and the exterior of
protuberance 24 is such that the protuberance is free to rotate
relative to piece 26 about an axis Z--Z. Section 26a is provided
with a skirt 26d which slidably overlies the exterior of the casing
surrounding the protuberance 24.
The socket piece sections are provided with an opening 27 which is
disposed in registered relation with the opening 25 formed in
protuberance 24. Openings 25 and 27 are adapted to receive a
bushing 28 and a screw pin 30. The exposed central surface of
section 26b is provided with a recess 31 which is adapted to
accommodate a lock nut 32 threaded onto the outer end of screw pin
30. The head 33 of the screw pin 30 is adapted to engage washer
W.
A rubber or felt disc 34 may be positioned over the recessed
surface 24b between the liner 22 and the interior of the casing
21.
The portion of the exterior of socket piece 26 adjacent the
juncture of the fork tines F.sub.1 is provided with a slot 35 into
which extends a tongue or lug 36 carried by the arm outer section
13b or 14b. The tongue 36 projects downwardly from the juncture of
the fork tines F.sub.1, see FIG. 3. The tongue 36 cooperates with
slot 35 to limit the pivotal movement of the unit 11 or 12 about
the axis Y--Y, see FIGS. 3 and 4.
The sockets S, aforementioned, are formed in the exterior of socket
piece 26, see FIGS. 1, 3, and 4 and are adapted to receive the
offset ends F.sub.2 of the fork tines F.sub.1. In lieu of the
sockets S and offset ends F.sub.2, the exterior of piece 26 may be
provided with laterally extending nubs or posts, not shown, which
would be embraced by loops formed at the ends of the fork
tines.
The socket piece 26, while shown as formed of two section, may be
of unitary construction, if desired. Furthermore, the shape and
size of the outer casing 21 may be varied from that shown. The
supporting arm 13 and 14 may also be attached to a helmet, not
shown, or other head-protecting member without departing from the
scope of the invention.
Thus, with the improved device, the wearer is not required to
pre-set each ear-accommodating device with respect to the
supporting arm before applying the device. In prior structures of
this general type, pre-setting of the ear-accommodating device to
either top or bottom, left or right, front or back, or in or out
positions was required and thus, was undesirable and awkward. The
improved device is self-adjusting and thus, more comfortable to
wear and provides better protection.
* * * * *