U.S. patent number 3,658,326 [Application Number 04/712,170] was granted by the patent office on 1972-04-25 for two-bulb, fluid filled hand exercising device.
Invention is credited to Thomas L. Fawick.
United States Patent |
3,658,326 |
Fawick |
April 25, 1972 |
TWO-BULB, FLUID FILLED HAND EXERCISING DEVICE
Abstract
The present hand exercising device has a pair of air-filled
rubber bulbs, one for each hand, and an unobstructed small diameter
passageway connecting the bulbs. Preferably, this passageway is
provided by a rubber tube which may be longitudinally stretchable.
One bulb carries a normally-closed check valve which opens if the
air pressure in the device drops below atmospheric pressure.
Inventors: |
Fawick; Thomas L. (Shaker
Heights, OH) |
Family
ID: |
24861025 |
Appl.
No.: |
04/712,170 |
Filed: |
March 11, 1968 |
Current U.S.
Class: |
482/49;
482/112 |
Current CPC
Class: |
A63B
23/16 (20130101); A63B 21/0085 (20130101) |
Current International
Class: |
A63B
23/035 (20060101); A63B 23/16 (20060101); A63B
21/008 (20060101); A63b 021/30 () |
Field of
Search: |
;272/68,57 ;46/87-90
;9/342 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Oechsle; Anton O.
Assistant Examiner: Dror; Richard
Claims
I claim:
1. A hand exercising device comprising a pair of fluid-filled bulbs
of deformable material and each shaped to be gripped in a
respective hand of the user, means providing an unobstructed small
diameter passageway between said bulbs, and a normally closed check
valve on one bulb which opens if the internal fluid pressure in the
device drops significantly below atmospheric pressure.
2. A hand-exercising device comprising a pair of air-filled bulbs
and a connecting tube extending between them, each of said bulbs
being of flexible and resilient rubber-like material and being
shaped and dimensioned to fit in a respective hand of the user,
said connecting tube being sealed to each bulb and presenting an
obstructed small diameter air passageway connected at its opposite
ends to the interior of said bulbs, and a normally closed check
valve on one bulb which is constructed and arranged to open if the
air pressure in the device drops significantly below atmospheric
pressure.
3. A hand-exercising device according to claim 2, wherein said tube
is flexible and is longitudinally stretchable manually.
Description
This invention relates to a hand exercising device.
Briefly, the present invention comprises a pair of fluid-filled
deformable bulbs, one for each hand, and an unobstructed small
diameter passageway between them. Preferably, the fluid which fills
the bulbs in air. The user may squeeze either bulb with the
corresponding hand to increase to the desired extent the fluid
pressure in both bulbs because of the connecting passageway between
them. The bulbs may be squeezed simultaneously or alternately to
provide the desired exercising of either or both hands, either to
increase the strength of the hands or to exercise the joints, as in
the case of arthritis sufferers.
It is a principal object of this invention to provide a novel and
improved hand exercising device which enables the user to
selectively control the resistance to squeezing that the device
exerts against either hand.
Another object of this invention is to provide such a hand
exercising device that may also be used for exercising the arm and
shoulder muscles.
Another object of this invention is to provide a novel and improved
hand exercising device having a check valve arranged to prevent the
fluid pressure inside the device from dropping below atmospheric
pressure.
Further objects and advantages of this invention will be apparent
from the following detailed description of certain
presently-preferred embodiments thereof, which are illustrated in
the accompanying drawing.
In the drawing:
FIG. 1 is a longitudinal section through a first embodiment of the
present invention;
FIG. 2 is an enlarged longitudinal section through the check valve
on the FIG. 1 device; and
FIG. 3 is a longitudinal section through a second embodiment of the
present invention.
Referring first to FIG. 1, the first embodiment of the present
invention comprises a pair of hollow bulbs 10 and 10' and a hollow
connecting tube 11, all composed of flexible and resilient
rubber-like material. Each bulb 10 and 10' is shaped and
dimensioned to be grasped by a respective hand of the user.
At its inner end the hollow bulb 10 has an inwardly-tapered neck 12
which has a snug fit in a complementary tapered recess 13 formed in
the adjoining end of the connecting tube 11. The bulb neck 12 and
the connecting tube 11 are adhesively bonded to each other in
fluid-tight fashion at this location, such as by vulcanized
adhesion.
Similarly, the bulb 10' has at its inner end an inwardly-tapered
neck 12' which is received snugly in a complementary recess 13' in
the connecting tube and is secured adhesively in fluid-tight
fashion to the latter, such as by vulcanization.
The connecting tube 11 and the tapered inner ends of bulbs 10 and
10' present an elongated, small diameter, longitudinal passageway
14 which is unobstructed along its complete length between the
hollow interiors of the bulbs 10 and 10'. This small diameter
passageway provides fluid communication between the interiors of
the respective bulbs.
In the preferred embodiment of this invention the fluid which fills
the two bulbs 10, 10' and the passageway 14 between them is air,
which is at substantially atmospheric pressure when both bulbs are
in their normal expanded conditions, as shown in the drawing.
Preferably, also, the bulb 10 carries a check valve in its outer
end wall which is normally closed. This check valve is adapted to
open in case the air pressure inside the device drops below
atmospheric pressure.
Referring to FIG. 2, the check valve V may comprise a housing 15
having an inlet passage 16 which is open at the outside of the bulb
10 and which presents a valve seat 17 for engagement by a ball 18.
A passage 20 in back of the ball 18 leads into the interior of the
bulb 10. The valve housing presents a plurality of
circumferentially-spaced ribs 19 at the front of passage 20. These
ribs are spaced a short distance behind ball 18 when the latter
engages valve seat 17. These ribs define between them a plurality
of passages around the ball 18 when the latter abuts against the
ribs.
When the pressure inside bulb 10 drops significantly below
atmospheric pressure, the pressure differential on opposite sides
of the ball 18 will cause it to move inwardly, away from the seat
17 and against the inner ends of the ribs 19. When the ball 18
unseats in this manner the inlet passage 16 is connected via the
passages between the ribs 19 to the passage 20 leading into the
interior of the bulb, so as to bring the internal pressure in the
device up to substantially atmospheric pressure.
It is to be understood that the check valve of FIG. 2 is disclosed
merely for purposes of illustration, and that any suitable check
valve may be used on the present hand exercising device.
FIG. 3 illustrates a second embodiment of the present invention
having two identical bulbs 30 and 30' with tapered inner ends 32
and 32', respectively, which terminate in annular flanges 31 and
31', respectively. These flanges are held in fluid-tight, abutting
engagement with each other by a metal ring 33 which is crimped
tightly around them. The inner ends of the bulbs provide the
unobstructed, small diameter passageway 34 connecting the interiors
of the bulbs 30 and 30'. Both bulbs preferably are of deformable
and resilient soft rubber or the like. Bulb 30 carries a check
valve V in its outer end wall for the purpose already
explained.
In the use of this exercising device, the user grasps one bulb in
each hand and he may squeeze either or both bulbs to increase the
air pressure in them to the desired extent. For example, if the
user wishes to exercise one hand he can first squeeze the other
bulb with his opposite hand to increase the air pressure in the
bulb grasped by the hand he wishes to exercise. It will be
understood that the bulb which is squeezed first offers relatively
slight resistance initially to being compressed, but the bulb held
by the other hand will be at the increased pressure before it is
squeezed and therefore it presents a relatively high resistance
initially, which initial resistance can be controlled by the
squeezing force exerted by the opposite hand. Therefore, the
present invention provides a hand exercising device whose
resistance to squeezing can be selectively regulated by the
user.
Obviously, both bulbs can be squeezed simultaneously, to match the
strength of one hand against the other, or the bulbs can be
squeezed and relaxed in alternate sequence to alternately exercise
the hands individually.
The connecting passageway between the bulbs, though unobstructed,
is of sufficiently small diameter to provide a brief time delay
between the squeezing of one bulb and the resulting pressure
increase in the other bulb. This enables the user to time the
squeezing of the latter bulb so that this hand will encounter a
progressively increasing resistance which is due both to the
delayed pressure increase originating from the first bulb and the
pressure increase due to the squeezing of the latter bulb
itself.
In the embodiment of FIG. 1, the connecting tube 14 preferably is
longitudinally stretchable, such as by being composed of soft
rubber or the like, and it may have a length between the bulbs
which is appropriate for the user to exercise his arm and shoulder
muscles by pulling the bulbs apart, stretching the connecting tube
in the process of doing so.
While certain presently preferred embodiments of the present
exercising device have been described in detail with reference to
the accompanying drawing, it is to be understood that various
modifications, omissions and adaptations which depart from the
disclosed embodiment may be adopted without departing from the
scope of the present invention. For example, the normal fluid
pressure in the bulbs may be above atmospheric, and the fluid
itself may be a gaseous or liquid medium other than air, if
desired.
* * * * *