Land vehicles – Convertible – Wheel to or from runner
Reexamination Certificate
2001-02-21
2002-05-14
Butler, Douglas C. (Department: 3613)
Land vehicles
Convertible
Wheel to or from runner
C280S841000, C280S011270, C280S011204, C280S011190, C036S115000
Reexamination Certificate
active
06386555
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention is related to an improved roller skate structure which has less components so that the manufacturing cost is relatively low. The time for assembling the components is shortened. When turning or pressing the components, the less transmission components will not distribute the transmission force so that the transmission can be truly achieved.
FIG. 1
shows a conventional roller skate including a boot
10
, two press caps
16
, two thrust bolts
17
, two locating seat assemblies
20
and two roller seats
31
. The front and rear portions of bottom side of the boot
10
are respectively formed with two cavities
11
. A reinforcing plate
12
is embedded in the top face of each cavity
11
. Each reinforcing plate
12
is formed with four locking holes
13
. The front and rear ends of the bottom face of the boot
10
are provided with brake blocks
14
. A lateral side of the boot
10
is formed with two two-step through holes
15
communicating with the cavities
11
. The press cap
16
is circular, having a diameter slightly smaller than the large diameter of the two-step through hole
15
. The press cap
16
has a certain elasticity and flexibility. The outer diameter of the thread section of the thrust bolt
17
is slightly smaller than the small diameter of the two-step through hole
15
. The locating seat assembly
20
is composed of a locating seat
21
, a pivot shaft
22
, a torque spring
23
, a C-shaped retainer ring
24
, a restoring spring
25
, a restricting pin
26
, a compression spring
27
, a locking member
28
, a driving plate
29
and a biased block
30
. Each of four corners of a locating board of the locating seat
21
is formed with a locking hole
211
. Two pivot plates
212
downward extend from bottom face of the locating seat
21
opposite to each other. The two pivot plates
212
define therebetween a space. The middle of each pivot plate
212
is formed with a pivot hole
213
. One side of one pivot plate
212
is provided with an outward extending fitting post
214
and a locking boss
215
. The locking boss
215
is formed with a thread hole
216
passing through the pivot plate
212
. The pivot shaft
22
is a two-step cylindrical member. The circumference of the large diameter section of the pivot shaft
22
is formed with a spring hooking hole
221
. The circumference of the small diameter section thereof is cut with a plane linking face
222
. The inner end is formed with an annular retainer groove
223
. The restricting pin
26
is a two-step member. The large diameter section thereof is formed as a stop head
261
. The end of the small diameter section thereof is formed with an outer thread
262
with a certain length. The locking member
28
is a two-step member. The small diameter section thereof is formed with an outer thread
281
. The end face is formed with a two-step hole
282
. One end of the driving plate
29
is formed with a driving restricting hole
291
. The other end thereof is formed with a linking hole
292
. The biased member
30
is also a two-step member. The large diameter section thereof is formed as a biased head
301
. The end of the small diameter section thereof is formed with a thread hole
302
with a certain depth. The roller seat
31
is composed of a pivot seat
311
and two rollers
312
pivotally connected with two sides of rear end of the pivot seat
311
. The front end of the pivot seat
311
is formed with a central transmission hole
313
. One side of the circumference of the transmission hole
313
is formed with a plane section. A certain portion of the circumference of the front end of the pivot seat
311
is formed with an insertion notch
314
.
When assembled, as shown in
FIG. 2
, the pivot seat
311
of the roller seat
31
is first fitted between the two pivot plates
212
of the locating seat
21
. The pivot shaft
22
is passed through the torque spring
23
and then passed through the pivot holes
213
of the locating seat
21
and the transmission hole
313
of the roller seat
31
to extend out of the inner pivot plate
212
of the locating seat
21
by a certain length. At this time, the C-shaped retainer ring
24
is fitted into the retainer groove
223
of the pivot shaft
22
. One end of the torque spring
23
is hooked into the hooking hole
221
of the pivot shaft
22
, while the other end thereof is leant against the locating board of the locating seat
21
, whereby the pivot shaft
22
is pivotally connected on the locating seat
21
. The roller seat
31
is also connected with the pivot shaft
22
. When the roller seat
31
is rotated, via the transmission hole
313
of the roller seat
31
and the transmission face
222
of the pivot shaft
22
, the pivot shaft
22
is rotated along with the roller seat
31
. Two ends of the torque spring
23
are tensioned and compressed. Then, the compression spring
27
is fitted onto the small diameter section of the restricting pin
26
with one end leant against the end face of the stop head
261
. Then, the small diameter section of the restricting pin
26
is fitted into the two-step hole
282
of the locking member
28
. The outer thread
262
extends out of the end face of the large diameter section of the locking member
28
and the linking hole
292
of the driving plate
29
. The other end of the compression spring
27
is leant against the end face of the large diameter section of the two-step hole
282
. The stop head
261
extends out of the end face of small diameter section of the locking member
28
. When subject to a pressing force, the stop head
261
can be moved retracted into the two-step hole
282
of the locking member
28
. Then, the outer thread
262
is screwed into the thread hole
302
of the biased member
30
. Accordingly, the restricting pin
26
passes through the driving plate
29
and the driving plate
29
is clamped between the locking member
28
and the biased member
30
. Then, the restoring spring
25
is fitted on the fitting post
214
of the locating seat
21
. The outer thread
281
of the locking member
28
is screwed into the thread hole
216
of the locating seat
21
. At this time, the stop head
261
fitted in the locking member
28
is pressed by the pivot seat
311
of the roller seat
31
and slided into the two-step hole
282
of the locking member
28
. Also, the compression spring
27
is compressed by the stop head
261
and the two-step hole
282
. Moreover, two ends of the restoring spring
25
are respectively leant against the face of the driving plate
29
and the pivot plate
212
of the locating seat
21
. Then, the thrust bolt
17
and the press cap
16
are sequentially fitted into the two-step through hole
15
of the boot
10
. The thread section of the thrust bolt
17
extends into the cavity
11
by a certain length and screwed into a washer and a nut. Thereafter, the thrust bolt
17
extends out of the end face of the nut by a certain length. At this time, the locating seat
21
is fitted into the cavity
11
of the boot
10
and the thrust bolt
17
is fitted into the driving restricting hole
291
of the driving plate
29
. One end of the nut is attached to the face of the driving plate
29
. Finally, a bolt is passed through the locking hole
13
of the boot
10
to be locked in the locking hole
211
of the locating seat
21
. Under such circumstance, the locating seat
21
together with the roller seat
31
is located in the cavity
11
and the assembly is completed..
When it is desired to turn the roller seat
31
to convert the boot
10
into a roller skate as shown in
FIG. 3
, a user needs to extend his/her hand into the cavity
11
of the boot
10
and downward turn the roller seat
31
. When turning the roller seat
31
, by means of the transmission hole
313
, the pivot shaft
22
will be rotated along with the roller seat
31
. When the pivot shaft
22
is driven, the torque spring
23
is compressed. When the insertion notch
314
of the roller seat
31
is aligned with the thread hole
216
of the locating seat
21
, t
Butler Douglas C.
Phoebe & George Enterprise Co., Ltd.
Troxell Law Office PLLC
LandOfFree
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