U.S. patent number 3,899,044 [Application Number 05/455,402] was granted by the patent office on 1975-08-12 for music stethoscope.
This patent grant is currently assigned to Michaud, Inc.. Invention is credited to Allan D. Mockabee, Elmer J. Stumpf.
United States Patent |
3,899,044 |
Stumpf , et al. |
August 12, 1975 |
Music stethoscope
Abstract
A stethoscope composed of a one-piece frame or body of molded
plastic adapted to support a pair of flexible sound tubes, the
frame including a pair of spaced flexible legs V-shaped in cross
section to receive the sound tubes therein with retaining lugs
integral with the body and overlying portions of the sound tube to
removably secure the latter, the V-shaped legs being provided with
longitudinal stiffening ribs at their external apical portions to
lessen the likelihood of leg breakage when they are flexed.
Inventors: |
Stumpf; Elmer J. (Los Angeles,
CA), Mockabee; Allan D. (Palmdale, CA) |
Assignee: |
Michaud, Inc. (Los Angeles,
CA)
|
Family
ID: |
23808658 |
Appl.
No.: |
05/455,402 |
Filed: |
March 27, 1974 |
Current U.S.
Class: |
181/135;
181/131 |
Current CPC
Class: |
A61B
7/02 (20130101) |
Current International
Class: |
A61B
7/02 (20060101); A61B 7/00 (20060101); A61B
007/02 () |
Field of
Search: |
;181/135,131,137,129
;179/1ST,182A,156 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Tomsky; Stephen J.
Claims
I claim:
1. A stethoscope comprising a generally U-shaped body having spaced
legs and a connecting bridge, each leg comprising a resilient
element V-shaped in cross section to provide a sound tube trough,
each leg being composed of two acutely angled wall elements joined
at their inner side edges and having free outer side edges, a
series of lugs disposed at spaced points along the outer side edges
and extending laterally inwardly therefrom so as to extend
partially over the V-shaped trough, said bridge being flat in plane
substantially the same as the plane defined by the longitudinal
axis of said legs, the bridge constituting a stiffening element
between the flexible legs, and sound tubes lying in the V-shaped
trough and partially beneath said lugs.
2. The structure in claim 1, and an integral flexible reinforcing
rib along the external apical portion of said V-shaped trough.
3. The structure in claim 1, and said lugs being disposed
alternately on opposite sides of said V-shaped trough
longitudinally thereof.
4. The structure in claim 1, one of said wall elements being wider
than the other, said lugs being staggered from one wall element to
the other and spaced lengthwise of the legs, and the lugs on the
wider of said wall elements being disposed a greater distance than
those on the other of said wall elements from the apex of the angle
defined by said wall elements.
5. The structure in claim 4, and an integral flexible reinforcing
rib along the external apical portion of said V-shaped trough.
Description
This invention relates to stethoscopes and more particularly of
inexpensive light weight and comfortable music stethoscopes such as
are used on aircraft and which are inexpensive enough to be
disposed of after a single use.
One of the objects of the invention is to provide a generally
U-shaped molded body of somewhat resilient plastic material wherein
the legs of the U-shaped body which carry portions of the flexible
sound tubes, are V-shaped in cross section, thereby defining a
sound tube trough with a minimum of material, the sound tube being
held in the trough by lugs spaced apart longitudinally of the legs
and alternating from one side of the trough to the other in
staggered relationship. Another object is to provide a stethoscope
whose V-shaped legs comprise a pair of walls joined along adjacent
edges and lying at an acute angle with one wall wider than the
other and with sound tube retaining lugs along the edges of both
walls in such arrangement as to efficiently yet removably hold the
sound tube in place.
Other objects and advantages of the invention will more fully
appear from the following description in connection with the
accompanying drawing.
FIG. 1 is an elevational view of an embodiment of the
invention;
FIG. 2 is an enlarged view of one of the legs of the plastic body
illustrated in FIG. 1;
FIG. 3 is a section on the line 3--3 of FIG. 2;
FIG. 4 is a fragmentary view of the lower portion of one of the
legs on the side opposite to that shown in FIGS. 1 and 2.
FIG. 5 is an enlarged fragmentary sectional view taken on the line
5--5 of FIG. 2.
The device includes a U-shaped body 6 comprising a pair of spaced
legs 8 and a bottom connector or bridge 10. The body 6 is
preferably made of a somewhat resilient plastic material so that
the upper ends of the legs can be moved apart for placement of the
body partially about the head of the wearer, the resilient
characteristics of the plastic causing the body to create a light
gripping action at opposite sides of the head of the wearer.
As best seen in FIG. 2, the legs 8 are V-shaped in cross section,
the angle of the side walls 12 of each leg being less than
90.degree. as illustrated. Along the apical edge of the angled legs
8, is a rib 14 which comprises a strengthening rib. With light
plastic material shaped at an angle, such as illustrated, flexing
of the legs 8 could cause cracking and fracturing of the legs. The
reinforcing rib 14 is provided to prevent such cracking and
fracturing in normal use of the stethoscope.
At spaced points along each side wall 12 of each leg 8 are sound
tube retaining lugs 16 and 18. The lugs 16 are formed in the inner
of the walls 12 which is somewhat wider than the outer wall. The
principal reason for this is the facilitation of removal of the
article from its mold. To further facilitate the molding operation
and removal of the mold, we provide openings 20 through each wall
in back of the lugs 16. Openings 20 accommodate molded pins which
assist in forming the underside of the lugs 16 and 18.
At the lower end of each leg 8 is a cutout 22 to provide for
convenient entry of a sound tube 24 into the bottom of the V-shaped
groove defined by the side walls of the legs 8. The sound tube 24
is flexible and can be snapped into the V-shaped groove past the
lugs 16 and 18 to be removably retained in the groove by the
lugs.
The upper end of each leg 8 is curved inwardly generally toward the
other and at said upper end, are lugs 16 and 18 which are directly
opposite each other in the two walls 12 to firmly anchor the upper
end of the sound tube 24 which is adapted to be protruded somewhat
beyond the end of the leg in order to removably receive a soft ear
pad 26 as is well known in the music stethoscope field.
The bridge 10 which connects the lower ends of legs 8 is relatively
wide and flat and lies in a plane coincident with a plane through
the longitudinal axis of the arms 8. The bridge 10 not only forms a
spacing connector for said legs 8 but because of the manner in
which it is positioned, renders the bridging portion inflexible
when the arms 8 are moved away from and toward each other. Thus,
the flexible arms 8 have sufficient resilience to permit them to be
opened and to cause them to close toward each other on the ears of
the user but the bridge 10 provides a sufficiently rigid
intermediate structure to give the arms sufficient strength to
remain in position on the ears.
The two flexible sound tubes 24, as is usual in music stethoscopes,
can be joined below the body 6. As is customary, they are provided
with integral molded jacks 28 for insertion into receptacles built
into the aircraft seat.
From the foregoing it will be seen that we have provided a music
stethoscope which can be made economically enough to permit it to
be disposed of after a single use. The two walls of the body set at
an acute angle, with the aid of the retaining lugs, provide
effective means for holding the sound tubes with a minimum of
material. Yet, by reason of the reinforcing rib, the resilient legs
of the U-shaped body are strong enough to withstand ordinary usage
without damage.
It will of course be understood that various changes can be made in
the form, details, arrangement and proportions of the various parts
without departing from the spirit of the invention.
* * * * *