U.S. patent application number 10/408843 was filed with the patent office on 2004-02-19 for in-line roller skates having quick-release axle system.
Invention is credited to Szendel, Adrian James.
Application Number | 20040032099 10/408843 |
Document ID | / |
Family ID | 25440999 |
Filed Date | 2004-02-19 |
United States Patent
Application |
20040032099 |
Kind Code |
A1 |
Szendel, Adrian James |
February 19, 2004 |
In-line roller skates having quick-release axle system
Abstract
A quick-release type axle system for in-line skates is
disclosed. A pair of axle shafts cooperate with each other to
support a wheel between a pair of frames. A release pin is inserted
into a central bore formed through the axle shafts to lock the axle
shafts relative to each other. In one embodiment, the release pin
is pulled outwardly to release the axle shafts from the locked
configuration, whereas in another embodiment, the release pin is
pushed inwardly to achieve unlocking of the axle shafts. In some
embodiments, a pair of release pins are used to achieve the
quick-release mechanism of the present invention.
Inventors: |
Szendel, Adrian James;
(Strongsville, OH) |
Correspondence
Address: |
Thomas J. Perkowski, Esq., P.C.
Soundview Plaza
1266 East Main Street
Stamford
CT
06902
US
|
Family ID: |
25440999 |
Appl. No.: |
10/408843 |
Filed: |
April 4, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10408843 |
Apr 4, 2003 |
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09935295 |
Aug 22, 2001 |
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6607198 |
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09935295 |
Aug 22, 2001 |
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08918808 |
Aug 26, 1997 |
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Current U.S.
Class: |
280/11.27 |
Current CPC
Class: |
A63C 17/226 20130101;
A63C 17/22 20130101 |
Class at
Publication: |
280/11.27 |
International
Class: |
A63C 017/06 |
Claims
What is claimed is:
1. An axle system for use in an in-line skate having a plurality of
wheels rotatably supported by a pair of wheel bearings disposed
between a pair of spaced apart frame rails, said axle system having
a locked configuration and an unlocked configuration and
comprising: a pair of axle shafts for passage through said frame
rails and one of said wheels for rotatable supporting said wheel
between said frame rails along a rotational axis, and at least one
of said pair of axle shafts having a bore formed therethrough along
said rotational axis; and a release pin for insertion into said
bore and releasably locking said axles shafts relative to each
other when arranged in said locked configuration to prevent said
axle shafts from disengaging from said wheel during skating, and
for releasing said axle shafts from said wheel when arranged in
said unlocked configuration.
2. The axle system of claim 1, wherein said release pin is spring
biased within said bore to a predetermined locking position which
locks said axle shafts relative to each other when arranged in said
locking configuration.
3. The axle system of claim 2, which further comprises a plurality
of balls arranged within at least one said axle shaft for
engagement with said release pin so as to interlock said axle
shafts in said locked configuration.
4. The axle system of claim 1, wherein at least one said axle shaft
has a cap portion with a hole formed therethrough in communication
with said bore, and said release pin has a notch formed in said
release pin so that when a retaining pin is inserted through said
hole, said retaining pin is engaged within said notch and delimits
the amount that said release pin is permitted to slid within said
bore.
5. The axle system of claim 4, which further comprises a bearing
spacer disposed between said wheel bearings and said axle shafts
engage said bearing spacer by way of said locking balls.
6. The axle system of claim 1, wherein each said axle shaft has a
bore formed along said rotational axis and a plurality of balls
arranged within said axle shaft, and one said release pin is
inserted through each said bore in order to engage said locking
balls and lock said axle shaft within said wheel.
7. The axle system of claim 1, wherein said release pin is pulled
out of said bore by a predetermined amount in order to unlock said
axle shafts in said unlocked configuration.
8. The axle system of claim 1, which further comprises a curved
spring washer to produce equalizing forces upon said frame
rails.
9. The axle system of claim 2, wherein at least one said axle shaft
has a cap portion with a hole formed therethrough in communication
with said bore, and said release pin has a notch formed in said
release pin so that when a retaining pin is inserted through said
hole, said retaining pin is engaged within said notch and delimits
the amount that said release pin is permitted to slid within said
bore.
10. A quick-release type axle system for use in an in-line skate,
comprising: a bearing spacer for spacing a pair of wheel bearings
within a skate wheel in said in-line skate; a pair of axle shafts
for rotatably supporting said skate wheel on said wheel bearings
about a rotational axis, and each said axle shaft having a central
bore and engaging with said bearing spacer along said rotational
axis; and a pair of axle release pins for insertion into said
central bores of said pair of axle shafts, respectively, and
causing said axle shafts to automatically lock with said bearing
spacer when said release pins are pushed into said central bores of
said axle shafts to a first predetermined position within said
central bore, and automatically unlock from said bearing spacer
when said release pins are pulled outwardly from said central bores
of said axle shafts to a second predetermined position.
11. A quick-release type axle system for use in an in-line skate,
comprising: a bearing spacer for spacing a pair of wheel bearings
within a skate wheel in said in-line skate; a pair of axle shafts
for rotatably supporting said skate wheel on said wheel bearings
about a rotational axis, and each said axle shaft having a central
bore and engaging with said bearing spacer along said rotational
axis; and a pair of axle release pins for insertion into said
central bores of said pair of axle shafts, respectively, and
causing said axle shafts to automatically lock with said bearing
spacer when said release pins are pushed into said central bores of
said axle shafts to a first predetermined position within said
central bore, and automatically unlock from said bearing spacer
when said release pins are pushed inwardly into said central bores
of said axle shafts to a second predetermined position.
12. A quick-release type axle system for use in an in-line skate,
comprising: a pair of axle shafts for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and each
said axle shaft having a central bore; and a pair of axle release
pins for insertion into said central bores of said pair of axle
shafts, respectively, and causing said axle shafts to automatically
lock relative to each other when said release pins are pushed into
said central bores of said axle shafts to a first predetermined
position within said central bore, and automatically unlock when
said release pins are pulled outwardly from said central bores of
said axle shafts to a second predetermined position.
13. A quick-release type axle system for use in an in-line skate,
comprising: a pair of axle shafts for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and each
said axle shaft having a central bore; and a pair of axle release
pins for insertion into said central bores of said pair of axle
shafts, respectively, and causing said axle shafts to automatically
lock relative to each other when said release pins are pushed into
said central bores of said axle shafts to a first predetermined
position within said central bore, and automatically unlock when
said release pins are pushed inwardly into said central bores of
said axle shafts to a second predetermined position.
14. A quick-release type axle system for use in an in-line skate,
comprising: a primary axle shaft for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and said
primary axle shaft having a first central bore formed through at
least a portion thereof; a secondary axle shaft for insertion into
said primary central bore along said rotational axis, and having a
second central bore extending along said rotational axis; and an
axle release pin for insertion into said second central bore of
said secondary axle shaft, and causing said primary and secondary
axle shafts to automatically lock with each other when said release
pin is pushed into said second central bore of said secondary axle
shaft to a first predetermined position within said second central
bore, and automatically unlock said primary and secondary axle
shafts from each other when said release pin is pulled outwardly
from said second central bore of said secondary axle shaft to a
second predetermined position.
15. A quick-release type axle system for use in an in-line skate,
comprising: a primary axle shaft for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and said
primary axle shaft having a first central bore formed through at
least a portion thereof; a secondary axle shaft for insertion into
said primary central bore along said rotational axis, and having a
second central bore extending along said rotational axis; and an
axle release pin for insertion into said second central bore of
said secondary axle shaft, and causing said primary and secondary
axle shafts to automatically lock with each other when said release
pin is pushed into said second central bore of said secondary axle
shaft to a first predetermined position within said second central
bore, and automatically unlock said primary and secondary axle
shafts from each other when said release pin is pushed inwardly
into said second central bore of said secondary axle shaft to a
second predetermined position.
16. An in-line skate having a quick-release type axle system,
comprising: a bearing spacer for spacing a pair of wheel bearings
within a skate wheel in said in-line skate; a pair of axle shafts
for rotatably supporting said skate wheel on said wheel bearings
about a rotational axis, and each said axle shaft having a central
bore and engaging with said bearing spacer along said rotational
axis; and a pair of axle release pins for insertion into said
central bores of said pair of axle shafts, respectively, and
causing said axle shafts to automatically lock with said bearing
spacer when said release pins are pushed into said central bores of
said axle shafts to a first predetermined position within said
central bore, and automatically unlock from said bearing spacer
when said release pins are pulled outwardly from said central bores
of said axle shafts to a second predetermined position.
17. An in-line skate having a quick-release type axle system,
comprising: a bearing spacer for spacing a pair of wheel bearings
within a skate wheel in said in-line skate; a pair of axle shafts
for rotatably supporting said skate wheel on said wheel bearings
about a rotational axis, and each said axle shaft having a central
bore and engaging with said bearing spacer along said rotational
axis; and a pair of axle release pins for insertion into said
central bores of said pair of axle shafts, respectively, and
causing said axle shafts to automatically lock with said bearing
spacer when said release pins are pushed into said central bores of
said axle shafts to a first predetermined position within said
central bore, and automatically unlock from said bearing spacer
when said release pins are pushed inwardly into said central bores
of said axle shafts to a second predetermined position.
18. An in-line skate having a quick-release type axle system,
comprising: a pair of axle shafts for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and each
said axle shaft having a central bore; and a pair of axle release
pins for insertion into said central bores of said pair of axle
shafts, respectively, and causing said axle shafts to automatically
lock relative to each other when said release pins are pushed into
said central bores of said axle shafts to a first predetermined
position within said central bore, and automatically unlock when
said release pins are pulled outwardly from said central bores of
said axle shafts to a second predetermined position.
19. An in-line skate having a quick-release type axle system,
comprising: a pair of axle shafts for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and each
said axle shaft having a central bore; and a pair of axle release
pins for insertion into said central bores of said pair of axle
shafts, respectively, and causing said axle shafts to automatically
lock relative to each other when said release pins are pushed into
said central bores of said axle shafts to a first predetermined
position within said central bore, and automatically unlock when
said release pins are pushed inwardly into said central bores of
said axle shafts to a second predetermined position.
20. An in-line skate having a quick-release type axle system
comprising: a primary axle shaft for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and said
primary axle shaft having a first central bore formed through at
least a portion thereof; a secondary axle shaft for insertion into
said primary central bore along said rotational axis, and having a
second central bore extending along said rotational axis; and an
axle release pin for insertion into said second central bore of
said secondary axle shaft, and causing said primary and secondary
axle shafts to automatically lock with each other when said release
pin is pushed into said second central bore of said secondary axle
shaft to a first predetermined position within said second central
bore, and. automatically unlock said primary and secondary axle
shafts from each other when said release pin is pulled outwardly
from said second central bore of said secondary axle shaft to a
second predetermined position.
21. An in-line skate having a quick-release type axle system,
comprising: a primary axle shaft for rotatably supporting a skate
wheel on a pair of wheel bearings about a rotational axis, and said
primary axle shaft having a first central bore formed through at
least a portion thereof; a secondary axle shaft for insertion into
said primary central bore along said rotational axis, and having a
second central bore extending along said rotational axis; and an
axle release pin for insertion into said second central bore of
said secondary axle shaft, and causing said primary and secondary
axle shafts to automatically lock with each other when said release
pin is pushed into said second central bore of said secondary axle
shaft to a first predetermined position within said second central
bore, and automatically unlock said primary and secondary axle
shafts from each other when said release pin is pushed inwardly
into said second central bore of said secondary axle shaft to a
second predetermined position.
Description
BACKGROUND OF INVENTION
[0001] 1. Field of Invention
[0002] The present invention relates generally to in-line roller
skates, and more particularly to a quick-release axle system for
use in the same.
[0003] 2. Brief Description of Prior Art
[0004] There are currently a wide variety of prior art axle systems
in use for mounting the wheels on in-line roller skates. Each skate
manufacturing company has it's own unique design and there are
several after-market companies which also manufacture axle kits.
Although each one differs somewhat in design, the general
configuration invariably involves a threaded portion which is
fastened with a nut.
[0005] In the common nut and bolt type axle system, the bolt
(acting as the axle shaft) passes through the axle aperture in the
skate frame, then through the bearings and bearing spacer, and is
held in place with a nut which is threaded onto the bolt from the
opposite side and tightened against the skate frame.
[0006] Other systems have the threaded portion on the inside of the
axle shaft. A screw is threaded into the axle from the opposite
side and tightened to hold it in place. A third popular method
involves threading the inside of the bearing spacer itself. A screw
is then inserted from each side of the frame and threaded into the
bearing spacer forming an axle to support the wheel.
[0007] All of these methods involve a tightening sequence using
allen wrenches, screw drivers, or wrenches of some type making
installation or removal of the wheels a tedious and time-consuming
process.
[0008] In addition, it is a common problem to have the keyed slot,
whether it be for an allen key or screwdriver, strip out making it
extremely difficult, if not impossible, to remove the axle with the
standard designated tools. Usually these can only be removed by
drilling or cutting the axle and replacing it with a new-one.
[0009] It is also possible for cross-threading to occur during
assembly which makes removal extremely difficult as well.
[0010] Thus, there is a great need in the art for an improved axle
system for use in connection with in-line roller skates, while
avoiding the shortcomings and drawbacks of prior art axle systems
and wheel mounting methodologies.
OBJECTS AND SUMMARY OF THE PRESENT INVENTION
[0011] Accordingly, it is a primary object of the present invention
to provide an improved axle system for use in connection with
in-line roller skates, while avoiding the shortcomings and
drawbacks of prior art axle systems and wheel mounting
methodologies.
[0012] A further object, of the present invention is to provide
such an axle system, in which a quick release, snap-lock apparatus
is used to secure the wheels to the frame on an in-line skate.
[0013] A further object of the present invention is to provide such
an axle system, which can accommodate the different axle aperture
diameters and bearing spacers most commonly used in in-line roller
skates.
[0014] A further object of the present invention is to provide a
quick-release type;axle system, in which a pair of axle shafts
automatically engage and lock with a bearing spacer within a skate
wheel-when a pair of axle release pins are inserted into a central
bore formed through each such axle shafts, and the axle shafts
automatically disengage from the bearing spacer when the release
pins are pulled out slightly from the axle shafts
[0015] A further object of the present invention is to provide a
quick-release type axle system, in which a pair of axle shafts
automatically engage and lock with each other when an axle release
pin is inserted into a central bore formed through one of such axle
shaft and the axle shafts automatically disengage with each other
when the release pin are pulled out slightly from the axle
shaft.
[0016] A further object of the present invention is to provide a
quick-release type axle system, in which a pair of axle shafts
automatically engage and lock with a bearing spacer within a skate
wheel when a pair of axle release pins are inserted into a central
bore formed through each such axle shaft, and the axle shafts
automatically disengage from the bearing spacer when the release
pins are pushed inwardly into the bore formed in the axle
shaft.
[0017] A further object of the present invention is to provide a
quick-release type axle system, in which a pair of axle shafts
automatically engage and lock with each other when an axle release
pin is inserted into a central bore formed through one of such axle
shafts and the axle shafts automatically disengage with each other
when the release pin is pushed inwardly into the bore formed in the
axle shaft.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] For a more complete understanding of the Objects of the
Present Invention, the following Detailed Description of the
Illustrative Embodiments of the Present Invention should be read in
conjunction with the accompanying Drawings, wherein:
[0019] FIG. 1 is a perspective view of an in-line roller skate,
incorporating the quick-release axle system of the first
illustrative embodiment of the present invention;
[0020] FIG. 2 is an exploded diagram of the quick-release axle
system of first illustrative embodiment of the present invention,
showing the major subcomponents thereof;
[0021] FIG. 2A is a perspective view of the bearing spacer used i
in conjunction with the quick-release axle system of the first
embodiment;
[0022] FIG. 2B is a perspective view of another type of bearing
spacer used in conjunction with the quick-release axle system of
the second embodiment;
[0023] FIG. 3 is a cross-sectional diagram of the quick-release
axle system of the present invention showing both axle shafts of
the system the axle haft on the left is in its locked and ready
position, while the axle shaft on the right is in the release
position as it would appear being either withdrawn or inserted
through the axle aperture;
[0024] FIG. 4 is an elevated side view of the bearing spacer used
in the first illustrative embodiment of the axle system of the
present invention;
[0025] FIG. 4A is a cross-sectional view of the bearing spacer of
the illustrative embodiment, taken along line 4A-4A of FIG. 4;
[0026] FIG. 5 is an elevated cross-sectional diagram of one of the
axle shafts removed from the quick-release axle system of the first
illustrative embodiment;
[0027] FIG. 6 is an elevated side view of the spring-like lock
washer used in conjunction each axle shaft of the quick-release
axle system of the first illustrative embodiment;
[0028] FIG. 7 is an elevated side view of the release pin, spring
and C-clip subassembly that slides along the central bore of each
axle shaft of the quick-release axle system of the first
illustrative embodiment;
[0029] FIG. 8 is an elevated, cross-sectional schematic diagram of
the second illustrative embodiment of the quick-release axle system
of the present invention, showing a pair of axle portions
releasably engaged with a bearing spacer supported within a wheel
of an in-line skate;
[0030] FIG. 8A is an elevated side view of the release pin as used
in conjunction with the quick-release axle system of the second
embodiment of FIG. 8 which utilizes the "pull" method for axle
release;
[0031] FIG. 9 is an elevated, cross-sectional schematic diagram of
the third illustrative embodiment of the quick-release axle system
of the present invention, showing a pair of axle portions
releasably engaged with each other while passing through a wheel of
an in-line skate;
[0032] FIG. 10 is an elevated, cross-sectional schematic diagram of
the fourth illustrative embodiment of the quick-release axle system
of the present invention, showing a pair of axle portions; and
[0033] FIG. 10A is an elevated side view of the release pin as used
in conjunction with the quick-release axle system of the second
embodiment of FIG. 10 which utilizes the "push" method for axle
release;
[0034] FIG. 11 is a exploded diagram of the fifth illustrative
embodiment of the quick-release axle system of the present
invention; and
[0035] FIG. 11A is an elevated cross-sectional schematic diagram of
the fifth illustrative embodiment of the quick-release axle system
of FIG. 11, which utilizes the "push" method for axle release.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS OF THE PRESENT
INVENTION
[0036] Referring to the figures in the Drawings, the illustrative
embodiments of the in-line roller skate of the present invention,
and the quick-release axle systems incorporated therein, will be
described in great detail. In connection with this detailed
description, like structures being indexed with like reference
numbers.
Overview of the In-Line Skate of the Present Invention
[0037] As shown in FIG. 1, a generalized embodiment of an in-line
skate of the present invention, comprises a number of components,
namely: a frame 1 having a pair of spaced apart frame rails 2A and
2B; a set of wheels 3, rotatable supported by way of the
quick-release axle system of the present invention, between the
frame rails; a brake structure 4 typically made of rubber or hard
plastic and mounted on the rear of the skate frame, for use in
braking operations; and a boot portion 5 mounted to the frame and
adapted for comfortably receiving the foot of its user. Details
regarding the general design of prior art in-line skates are
disclosed in Applicant's U.S. Pat. No. 5,362,075, incorporated
herein by reference. It is understood that the design of the boot
and the frame structure of the in-line skate hereof may differ from
embodiment to embodiment thereof without departing from the scope
or spirit of the present invention. Any of the illustrative
embodiments of the quick-release axle system of the present
invention described below can be incorporated in such in-line skate
designs.
In-Line Skate Embodying The Quick-Release Axle System of the First
Illustrative Embodiment of the Present Invention
[0038] In FIG. 2, an exploded perspective view of the quick-release
axle system of the first illustrative embodiment is shown. As
illustrated, the system comprises three subcomponents, namely: a
bearing spacer 6 installed between the bearing assemblies 7A and
7B; first and second axle shafts 8A and 8B; and first and second
axle-shaft release pins 9A and 9B. Notably as axle shafts 8A and 8B
are identical, the description of the structure will be made with
reference to axle shaft 8B for purposes of explication. Each wheel
on the in-line skate consists of a tire portion 10 surrounding an
inner core 10A which has been formed with an inner bore so as to
receive bearings 7A and 7B with bearing spacer 6 disposed
therebetween.
[0039] As shown in FIGS. 3 and 4, the bearing spacer 6 has a
central portion 6A and hollow end portions 6B and 6C extending
therefrom. The ends of the bearing spacer 6 are machined with an
outer diameter that permits the bearing spacer to fit into the
inner bore of the inner race of the bearings 7A and 7B. The center
portion of the spacer 6A has a larger diameter than the end
portions thereof 6B and 6C in order to create a shoulder that
contacts the inner races of the bearings. The bearing spacers are
provided with an inner bore 6D through which each wheel axle shaft
8A and 8B is passed enabling the wheel to be attached to the skate
frame. In the illustrative embodiment, four equally-spaced indents
11 (e.g., holes of 0.0940 inch diameter) are formed at a
predetermined distance from the end of the bearing spacer. The
function of these holes is to receive an axle-locking ball (i.e.,
spherical element) 12 (e.g., 0.09385 inch diameter). This
arrangement forms a mechanism for locking the axle shaft relative
to the bearing spacer. The steel material of the axle shaft around
these ball bearings is crimped in order to keep them from falling
back out of the detents.
[0040] As shown in FIGS. 3 and 5, each axle shaft 8A and 8B has a
hollow bore 13 (of about 0.130 inch diameter) formed centrally
therethrough, and an end cap portion 14. In the illustrative
embodiment, the cap portion is about 0.1875 inches at its thickest
point. A recess, FIG. 2, 18 is machined into one half of the cap
portion 14 in order to allow for an access point for the release
pin. The outer diameter of the axle shaft has an outer diameter of
about a 0.25 inch and is adapted for insertion through an aperture
15 formed in the frame rail and the hollow bore 6D of the end
portion of the bearing spacer. The bore at once end of the axle
shaft is enlarged to a diameter of 0.1875 for a length of about
0.215 inches in order to accommodate a return spring 16 and
retaining clip 17 slipped over the end of the release i pin 9A
(9B)
[0041] As shown in FIG. 7, each axle-shaft release pin 9A and 9b
has a first cylindrical body portion 19 of a first length, and a
second cylindrical body portion 20 of a second (i.e., shorter)
length separated by a tapered portion 21 of narrower diameter than
the first and second cylindrical portions of the release pin. A
hole 22 having a 0.0625 inch diameter is drilled through the
release pin shaft 19 at about 0.093 inches from one end of the
shaft, as shown in FIG. 3. The function of hole 22 is to allow a
tool or pin to be used to pull the release pin 9A, (9B) out of the
axle shaft during axle release operations. When the release pin is
retained within the axle shaft, during the axle locked
configuration, the hole 22 in the release pin is recessed within
the end of the axle shaft (as shown in the left side of FIG. 3) and
thus, cannot be inadvertently pulled out during roller skating
activity.
[0042] In the illustrative embodiment, a recess or slot 23 (e.g.,
having dimensions of 0.0312 inch deep.times.0.145 inches long) is
machined into the shaft at about 0.100 inches from the end of the
axle shaft where the hole 22 has been drilled. The function of this
slot 23 is to allow for the insertion of a retaining pin or screw
24 through a hole drilled laterally through the side of the cap
portion extending therefrom into the inner bore of the axle shaft
so that the release pin can be retained within the bore of the axle
shaft.
[0043] As shown in FIGS. 3 and 7, a small return spring 16 is
installed over the end of the release pin shaft 20 and c-clip
retainer 17 is pushed onto a machined groove 25 in the axle shaft
in order to retain the return spring on the end portion thereof.
The function of the return spring 16 is to hold the release pin in
the locked position within the axle shaft during the vibration
encountered while skating. With this arrangement, the return spring
16 is then trapped between the c-clip 17 and the inner flange 26
machined within the bore of the axle shaft, while the retaining
screw 24 is inserted into the slot 23 formed in the end of the
release pin. As shown in FIG. 3, the release pin 22 is retained
within the bore of the respective axle shaft and is permitted to
slide therewithin a distance equal to the length of slot 23 formed
in the end of the release pin.
[0044] As shown in FIG.3, a curved spring steel washer 27 (of 0.017
inches thickness and 0.500 inch outer diameter and inner diameter
of about 0.251 inches) is positioned over the axle shaft. The
spring washer 27 is pressed against the inner surface of the end
cap 14 in order to provide tightness when the axle shafts are
installed and locked to the bearing spacer. Also, a nylon plastic
cover may be fashioned to snap-fit over the cap end 14 of the main
axle.
Assembly And Disassembly of the Quick-Release Axle System Of The
First Illustrative Embodiment of the Present Invention
[0045] Each bearing 7A and 7B is installed into the wheel from
opposite sides, separated by bearing spacer 6A. As the axle shaft
is inserted into the bore of the bearing spacer, the locking balls
12 held within the shaft by crimpings automatically fall into place
into the corresponding holes 11 in the bearing spacer. The release
pin is then allowed to retract within the inner bore of the axle
shaft due to the pressure of the return spring 16 which
automatically forces the release pin inward toward the bearing
spacer so that the central portion 21 thereof is positioned
directly beneath detent holes 11 and contacts the surface of the
steel locking balls 12 forcing them to remain locked within the
holes 11 (detents) formed in the bearing spacer. In this locked
configuration, shown in the left side of FIG. 3, the cylindrical
portion 19 of the release pin 9A renders it impossible for the ball
bearings 12 to move downward, or out of their corresponding
detents, and thus provides an extremely strong and efficient
locking mechanism.
[0046] When the release pin 9A is pulled outwardly from the axle
shaft 6A by an amount limited by the length of slot 23, (i.e.,
against the outwardly directed biasing forces produced by return
spring 16), the ball bearings 12 are permitted to fall within the
narrow circumferential groove 21 formed in the portions of the
release pin, as shown in the right side of the figure of FIG. 3. In
this unlocked configuration, the axle shaft is released from the
bearing spacer and can be withdrawn from the bearing spacer, wheel
assembly and skate frame. When both release pins on a particular
wheel have been "released" or arranged into their unlocked
configuration, then the associated axle shafts can be withdrawn
from the bearing spacer and the wheel assembly easily removed from
the frame of the in-line skate.
[0047] Pulling the spring-biased release pin 9A out from its
corresponding axle shaft can be carried out using a small tool,
(e.g., a paper clip or an accessory device). The tool is slid
through the hole 22 formed in the end of the release pin and allows
the release pin to be pulled out slightly (against the force of the
return spring) so that the balls 12 retaining the axle shaft within
the bearing spacer can be allowed to fall out of their
corresponding holes, as described hereinabove.
[0048] In the locked configuration, curved spring steel washer 27
applies pressure to the outside of the skate frame in order to take
up any slack and provide a tight fit. The fit can be adjusted
further, if desired, by using washers of different thicknesses as
shims installed over the axle shaft to be positioned between the
spring steel washer and the skate frame.
In-Line Skate Embodying The Quick-Release Axle System of the Second
Illustrative Embodiment of the Present Invention
[0049] A second illustrative embodiment of the quick-release axle
system of the present invention is shown in FIGS. 8 and 8A. While
this embodiment is quite similar to the embodiment of FIG. 3, there
are a number of minor differences. In particular, the bearing
spacer 30 in FIG. 8 does not have an outer bore surface that slides
into the inner bore of the inner race of the bearing, as in the
first embodiment shown in FIG. 3. Instead, the bearing spacer 30 is
shaped like a bushing whose inner and outer diameters are exactly
the same as the inner and outer diameters of the inner race of the
bearing itself. Therefore, the axle shaft diameter is larger in
order to correspond with the diameter of the inner bore of the
inner bearing race.
[0050] Circumferential grooves 31A and 31B are cut into the inner
surface of the inner bore of the bearing spacer 30 (about 0.030
inches deep) in lieu of the equally spaced holes in the bearing
spacer of the first illustrative embodiment described above. When
the axle shaft is pushed into place, the locking balls lock into
place within the recess provided by the groove. The groove is
positioned so as to create a tight fit between the flange and the
skate frame upon installation. Other minor differences will be
described below.
Assembly And Disassembly of The Quick-Release Axle System of The
Second Illustrative Embodiment of the Present Invention
[0051] As in the case of the first illustrative embodiment, each
bearing is installed into the wheel from opposite sides and
separated by bearing spacer 30. As the axle shafts 6A and 6B are
inserted into the bore of the bearing spacer, the locking balls 12
held within the shaft by crimpings automatically fall into place
into corresponding grooves 31A and 31B. Releasing the release pin
allows pressure from the return spring 16, which is compressed
within the bore of shaft 6A (6B) between interior flange 34 and
circumferential flange 33, to cause the release pin to slide inward
toward the center of the spacer, so that the outer surface of
circumferential flange 33 is disposed directly beneath and contacts
the surface of the axle-locking balls 12, forcing them to remain
locked within the circumferential groove 31A (31B) formed in the
inner bore of the bearing spacer. In this configuration, the end of
the release pin will remain recessed within the bore of the axle
shaft, while the axle shaft and bearing spacer are securely locked
together and the release pin is prevented from being inadvertently
pulled out of its locked configuration. In this locked
configuration, shown in the right side of the figure of FIG. 8, the
release pin 9A (9B) renders it impossible for the ball bearings 12
to move downward, or out of their corresponding grooves 31A (31B),
and thus provides an extremely strong and efficient locking
mechanism.
[0052] When the release pin 9A (9B) is pulled outwardly by an
amount limited by the length of slot 23, (i.e., against the
outwardly directed biasing forces produced by return spring), the
locking balls 12 are permitted to fall within the narrow
circumferential recess 35 formed between the outer surface of the
end portions of the release pin, as shown in the left side of the
figure of FIG. 8. In this unlocked configuration, the axle shaft is
released from the bearing spacer and can be withdrawn from the
bearing spacer 30, wheel assembly and skate frame. When both
release pins on a particular wheel have been "released" or arranged
into their unlocked configuration, then the associated axle shafts
can be withdrawn from the bearing spacer 30 and the wheel assembly
can be easily removed from the frame of the in-line skate.
[0053] Pulling the spring-biased release pin 9A (9B) out from its
corresponding axle shaft can be carried out using a small tool,
(e.g., a paper clip or accessory device) that slides through the
hole 22 formed in the end of the release pin and allows the release
pin to be pulled out slightly (against the a force of the return
spring) so that the locking balls 12 retaining the axle shaft
within the bearing spacer 30 can be allowed to fall out of their
corresponding holes, as described hereinabove.
In-Line Skate Embodying The Quick-Release Axle System of the Third
Illustrative Embodiment Of The Present Invention
[0054] In FIG. 9, a third alternative embodiment of the present
invention is shown. In this embodiment, the bearing spacer is not
used as part of the axle-shaft locking mechanism. Instead, the axle
system comprises: a main axle shaft 40 insertable through the first
skate frame wall 2A, the first bearing 7A, the bearing spacer 41,
the second bearing 7B, and the second skate frame wall; and a
secondary axle shaft 42 for insertion within a central bore 43
formed within the main axle shaft 40. As shown in FIG. 8, the main
shaft axle has head portion 44 formed on one end of its cylindrical
body portion, and central bore 43 formed through the end of its
body portion opposite head portion 44. The length of the bore 43
extends about half way across the length of the axle shaft. A
release pin 45, similar in design as the release pin 9A (9B) shown
in FIG. 8, is provided for insertion through a central bore 46
formed in the secondary axle shaft 42, to engage with ball bearing
12. As shown in FIG. 9, a circumferential groove 47 is cut into the
inner surface of the inner bore of the main axle shaft 42. The
locking portion works exactly the same as in the second embodiment,
but the dimensions of the components are smaller. The main and
secondary axle shafts 40 and 42 inserted from opposite sides of the
skate frame, pass push the frame, bearings and bearing spacer, and
lock together forming the axle.
[0055] In the illustrative embodiment, the main axle shaft 40 has
an outer diameter of about 0.3125 inches and is adapted for
insertion through apertures 2A and 2B formed in the frame rail 2A
and 2B. Rounded cap portion 44 is about 0.1875 inches at its
thickest point. A recess 48, 0.0625 inches deep and 0.089 inches
long is machined into one half of the cap in order to allow for an
access point for the release pin 45.
[0056] A hole 49 having a 0.0625 inch diameter is drilled through
the release pin shaft at about 0.093 inches from one end thereof,
as shown in FIG. 9. The function of hole 49 is to allow a tool or
pin to be used to pull the release pin 45 out of the axle shaft
during axle release operations. When the secondary axle shaft 42 is
retained within the main axle shaft, during the axle locked
configuration, the hole in the release pin is recessed within the
end of the axle shaft and thus cannot be inadvertently pulled out
during roller skating activity.
[0057] As shown in FIG. 9, a small return spring 16 is installed
over the central body portion of the release pin shaft and
restrained by an enlarged annular-shaped flange 50, which is
designed to engage balls 12 in the system's locked configuration.
The function of the return spring is to hold the release pin in the
locked position within the axle shaft during the vibration
encountered while skating. Within this arrangement, the return
spring is then trapped between the annular 50 and the inner flange
51 of the machined groove bore 52 formed in the axle shaft, while
the retaining pin 24 is inserted into the slot 53 formed in the end
of the release pin, as shown in FIG. 9. As such, the release pin 45
is retained within the bore of the secondary axle shaft and is
permitted to slide therewithin a distance equal to the length of
slot 53 formed in the end of the release pin. As shown in FIG. 9, a
curved spring steel washer 27 is positioned over the secondary axle
shaft 42 which tightens the axle system in the locked
configuration. Also, a nylon plastic cover can be snapped over the
cap end of the second axle shaft.
Assembly And Disassembly of the Quick-Release Axle System of The
Third Illustrative Embodiment of the Present Invention
[0058] Each bearing 7A, 7B is installed into the wheel from
opposite sides. Then, the main axle shaft is inserted into the bore
of the wheel and thereafter the secondary axle shaft is slid into
the bore within the main axle shaft. When the release pin 45 is
slid into the bore of the second axle shaft, the two steel locking
balls are automatically forced into place into the circumferential
groove 54 formed within the control portion of the bore 52 within
the main axle shaft. In this configuration, the end of the release
pin will remain recessed within the bore of the primary axle shaft,
while the primary axle shaft and second axle shaft are securely
locked together and the release pin prevented from being
inadvertently pulled out of its locked configuration. In this
locked configuration, shown in FIG. 9, the release pin 45 renders
it impossible for the axle-locking balls 12 to move downward, or
out of their corresponding detents, and thus provides an extremely
strong and efficient locking mechanism.
[0059] When the release pin 45 is pulled outwardly by an amount
limited by the length of slot 53, (i.e. against the outwardly
directed biasing forces produced by the return spring), the ball
bearings 12 are permitted to fall within the narrow circumferential
groove 54. In this unlocked configuration, the secondary axle shaft
42 is released from the primary axle shaft 40 and can be withdrawn
therefrom, as well as the wheel assembly and the skate frame. When
the release pin on a particular wheel has been "released" or
arranged into its unlocked configuration, then the secondary axle
shaft can be withdrawn from the primary axle shaft and the wheel
assembly easily removed from the frame of the in-line skate.
[0060] Pulling the spring-biased release pin 45 out from the main
axle shaft can be carried out using a small tool, (e.g. a paper
clip or accessory device) that slides through the hole 48 formed in
the end of the release pin.
In-Line Skate Embodying The Quick-Release Axle System of the Fourth
Illustrative Embodiment of the Present Invention
[0061] FIGS. 10 and 10A, a fourth illustrative embodiment of the
quick release axle system is shown. In this embodiment, wherein the
release pins are released by a "pushing" operation rather than by a
pulling operation. As in the case of the second illustrative
embodiment, each bearing 7A, 7B is installed into the wheel 10 from
opposite sides and separated by bearing spacer 60. As the axle
shafts 61A (61B) are inserted into the bore of the bearing spacer,
the locking balls 12 held within the shaft by crimpings,
automatically fall into place within corresponding grooves 62A
(62B). Then as the release pin 68A (68B) is slid within the inner
bore of the axle shaft and the retaining pin 24 inserted within the
slot 64 formed therein, the return spring 16, retained between
circumferential flange 65 and c-clip 66 (in circumferential groove
70) will automatically force the release pin outwards (away from
the center of the bearing spacer) so that circumferential flange 67
is disposed directly beneath and contacts the surface of the
axle-locking balls 12, forcing them to remain locked within the
circumferential groove 62(A), 62(B) formed in the bearing spacer.
In this configuration, the end of the release pin will remain
recessed within the bore of the axle shaft, while the axle shaft
and bearing spacer are securely locked together and the release pin
prevented from being inadvertently pulled out of its locked
configuration. In this locked configuration, shown in the right
side of the figure of FIG. 10, the release pin 68A 68(B) renders it
impossible for the axle-locking balls 12 to move downward, or out
of their corresponding grooves 62A 62(B), and thus provides an
extremely strong and efficient locking mechanism.
[0062] When the release pin 9A (9B) is pushed inwardly by an amount
limited by the length of slot 64, (i.e., against the outwardly
directed biasing forces produced by return spring), the
axle-locking balls 12 are permitted to fall within the narrow
circumferential recess 69 formed between the outer surface and end
portions of the release pin, as shown in the right side of the
figure of FIG. 10. In this unlocked configuration, the axle shaft
is released from the bearing spacer and can be withdrawn from the
bearing spacer 30, wheel assembly and skate frame. When both
release pins on a particular wheel have been "released" or arranged
into their unlocked configuration, then the associated axle shafts
can be withdrawn from the bearing spacer 30 and the wheel assembly
easily removed from the frame of he in-line skate.
[0063] Pushing the spring-biased release pin 68A (68B) into its
corresponding axle shaft can be carried out using a small tool
(e.g., a screw driver or accessory device) that is slid into the
open end of the bore in the axle shaft, and pushed against release
pin (against the force of the return spring) so that the
axle-locking balls 12 retaining the axle shaft within the bearing
spacer 60 can be allowed to fall out of their corresponding holes,
as described above.
In-Line Skate Embodying The Quick-Release Axle System of the Fifth
Illustrative Embodiment of the Present Invention
[0064] FIGS. 11 and 11A, a fifth illustrative embodiment of the
quick release axle system is shown. The fifth embodiment of the
present invention is constructed in the same manner as the second
embodiment except that only a single axle shaft 8B" is used instead
of two separate axle shafts to support each wheel. In this
configuration, the axle shaft 6B" does not interlock with the
bearing spacer 6. Instead, the axle shaft 8B" is made long enough
to pass through the skate frame 2B from one side, through the frame
spacer, wheel and bearing assemblies 7A, 7B and the axle aperture
in the frame portion on the opposite side. The interlocking balls
12 then use the outer surface of the other side of the skate frame
2A itself to lock the axle shaft in place when the release pin 9B"
is allowed to slide into position, beneath the locking balls,
within the main axle bore 70 formed therein.
[0065] As in the case of the second illustrative embodiment, each
bearing 7A, 7B is installed into the wheel 10 from opposite sides
and separated by bearing spacer 6. As the axle shaft 8B" is
inserted through the bore of the bearing spacer, and bearings 7A,
7B and frame rails 2A, 2B as shown in FIG. 11A, the locking balls
12 held within the shaft by crimpings, automatically fall into
place outside the outer surface of skate frame 2A, creating a
locking mechanism. Then as the release pin 9B" is slid within the
inner bore of the axle shaft (or the side of frame rail 2A) and the
retaining pin 24 inserted within the slot 64 formed therein, the
return spring 16, retained between circumferential flanges 65' and
67' will automatically force the release pin outwards (away from
the center of the bearing spacer) so that circumferential flange
67' is disposed directly beneath and contacts the surface of the
axle-locking balls 12, forcing them to remain locked outside frame
rail 2A. In this configuration, the end of the release pin will
remain recessed within the bore of the axle shaft, while the axle
shaft is securely locked between the frame rails 2A and 2B while
the release pin 9B" is prevented from being inadvertently pulled
out of its locked configuration. In this locked configuration,
shown in the right side of the figure of FIG. 11A, the release pin
9B" renders it impossible for the axle-locking balls 12 to move
downward, or away from the outer surface of frame unit 2A, and thus
provides an extremely strong and efficient locking mechanism.
[0066] When the release pin 9B" is pulled automatically outwardly
by an amount limited by the length of slot 64, (i.e., against the
outwardly directed biasing forces produced by return spring), the
axle-locking balls 12 are permitted to fall within the central bore
of the axle shaft. In this unlocked configuration, the axle shaft
is released from the frame rails 2A and can be withdrawn from the
bearing spacer 6, wheel assembly and skate frame. When the release
pin on a particular wheel has been "released" or arranged into its
unlocked configuration, then the associated axle shaft can be
withdrawn from the bearing spacer and the wheel assembly easily
removed from the frame of he in-line skate.
[0067] In the alternative embodiment of the axle system shown in
FIGS. 11 and 11A, a cap can be used to engage with locking balls
12, outside of the rail frame 2A. In such an embodiment, the cap
will have an inner bore with a diameter which is slightly larger
than the diameter of the axle shaft 8B". A circumferential groove
is then machined at a predetermined distance from one end of the
cap within the inner bore. The cap is then pressed onto the
protruding portion of the axle shaft 8B" from the opposite side of
the frame 2A. The locking balls 12 then interlock within the
circumferential groove in the cap when the release pin is allowed
to slide into position within the bore formed through the axle
shaft 8B".
[0068] As in the previous examples, the axles may be designed so
that releasing the axle from the skate is accomplished by pulling
the release pin outward slightly, or they may be designed so that
the release procedure involves pushing the release pin inward
slightly.
[0069] While the present invention has been exemplified by the
illustrative embodiment thereof described above, it is understood
that such embodiments can be readily modified without departing
from the shape and spirit of the present invention set forth by the
appended claims to invention.
* * * * *