Brakes – Operators – Electric
Reexamination Certificate
2001-10-12
2003-07-01
Schwartz, Christopher P. (Department: 3683)
Brakes
Operators
Electric
C188S079560
Reexamination Certificate
active
06585087
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an improved control mechanism for use in a magnetically operated wheel. It mainly is made up of an outer cover, an inner housing, a pair of compression springs, two small supporting wheels, two linkage pieces, an externally connected pull cord control mount, a sensor, a signal transmitter mount and an internal or external transmission set. In adjustment, only a motor is activated to make a main transmission device, a secondary transmission device, a driven gear, a restraint unit and a driving wheel rotate in synchronism. Besides, when the driving wheel rotates, a lower gear and the linkage rack of the two pivotal linkage pieces equipped with a plurality of magnets and housed in a flywheel are in mesh engagement with each other to vary the distance between the magnets and the flywheel so as to make the adjustment of braking resistance of the flywheel in a stageless manner.
People living in a modern society are busy with their work and seldom have time to engage in outdoor physical exercise, so many of them attend indoor health clubs to maintain their physical fitness by means of various types of exercise equipment. Taking an exercise bike for example, it is mainly equipped with a magnetically operated wheel which is made of magnetic material (such as iron) and has a set of magnets housed therein. By way of a closed magnetic field built up between of the magnets and the wheel of magnetic material, a braking resistance is formed to stop the magnetically operated wheel to rotate. Thereby, the variation of the distance between the magnets and the magnetically operated wheel can produce different brake resistance, resulting in generation of various physical exercise level for different people.
Referring to
FIG. 1
, a conventional control mechanism of the magnetically operated wheel is illustrated in explosion. It is comprised of a flywheel
10
, two inner wheel mounts
20
, two brake plates
21
, two wire guide rollers
22
, two compression springs
23
, two positioning seats
24
and a wheel shaft
30
. The flywheel
10
has an open-topped chamber
11
with a hollow axle hole
12
defined at the center thereof and four through holes
13
positioned around the central axle hole
12
. Each of the inner wheel mounts
20
has a raised platform
201
having a central shaft hole
202
at the center thereof with a pair of rectangular spring receiving chambers
203
and a wire receiving slot
204
on the outer peripheral edge thereof. Adjacent to each spring receiving chamber
203
and on the inner side of the inner wheel mount
20
is disposed a stop post
205
. Two symmetric locking posts
206
are located at opposite edges of the wheel mount
20
. On both sides of only one of the locking post
206
is disposed a pivot stem
207
each having a hole
208
. Next to the other locking post
206
is located a two staged insertion post
209
. Around the central shaft hole
202
are disposed four locking holes
2021
. Each braking plate
21
is in a curved form with a plurality of magnets
211
secured to the outer surface thereof and has a wire hole
212
at one end and an H-shaped extension unit
213
having a pivot edge
214
smaller than the inner diameter of the hole
208
at the other end. Each positioning seat
24
has a shaft hole
241
at the center with four locking holes
242
on its base board. The wheel shaft
30
has two threaded ends
301
.
The flywheel
10
and the inner wheel mounts
20
are integrally joined together with the brake plates
21
housed between the wheel mounts
20
. The positions of the brake plates
21
can be adjusted to vary the brake resistance of the conventional magnetically operated wheel as a result of the variation of the magnetic attraction of the magnets
211
on the flywheel
10
. The brake plates controlled by the wire A can be pivoted adjusted as the end of the wire A is pulled outwardly as shown in FIG.
2
. Such a prior art structure has a disadvantage in operation. The wire A must be pulled with effort to pivot both the brake plates
21
, resulting in easy breaking of the wire A or getting-stuck in operation.
SUMMARY OF THE INVENTION
Therefore, the primary object of the present invention is to provide an improved control mechanism for use in a magnetically operated wheel which drives in linkage the respective wheels by way of a motor so as to permit the magnetically operated wheel not only to be adjusted in a stageless manner without any restraint but also effectively increase the applied force and reduce the resistance by way of a torsion limiting security device and an effort saving level. Even the microcomputer control is out of order, the wheel will not be damaged whereby the magnetically operated wheel can be fully performed to its limit.
REFERENCES:
patent: 1729841 (1929-10-01), Noble
patent: 1757348 (1930-05-01), Van Buskirk
patent: 1758139 (1930-05-01), Blackmore
patent: 2002139 (1935-05-01), Rosiers
patent: 3613356 (1971-10-01), Woodward
patent: 4807828 (1989-02-01), Yamaguchi
patent: 5437353 (1995-08-01), Wu
patent: 5711404 (1998-01-01), Lee
patent: 5934433 (1999-08-01), Leimbach et al.
patent: 6360855 (2002-03-01), Szu-Yin
Bacon & Thomas PLLC
Nguyen Xuan Lan
Schwartz Christopher P.
Yuan Ho Chuen Co., Ltd.
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