U.S. patent application number 14/611664 was filed with the patent office on 2016-08-04 for caster yoke for manufacture of a set of wheeled caster assemblies.
The applicant listed for this patent is Darcor Limited. Invention is credited to Adrian Steenson.
Application Number | 20160221392 14/611664 |
Document ID | / |
Family ID | 56553776 |
Filed Date | 2016-08-04 |
United States Patent
Application |
20160221392 |
Kind Code |
A1 |
Steenson; Adrian |
August 4, 2016 |
CASTER YOKE FOR MANUFACTURE OF A SET OF WHEELED CASTER
ASSEMBLIES
Abstract
A caster yoke for use in the manufacture of a set of wheeled
caster assemblies. Each wheeled caster assembly of the set of
wheeled caster assemblies has unique functional capabilities
relative to each other wheeled caster assembly of the set, which
unique functional capabilities arise from a respective combination
of one or more caster components mounted on the caster yoke. The
caster yoke has all of the mounting features necessary to
selectively mount all of the respective caster components of the
set of wheeled caster assemblies on the caster yoke. In this
manner, the same caster yoke may be used without modification of
its structure as a key structural component common to the entire
set of wheeled caster assemblies thereby significantly reducing
production and inventory costs for the set of caster
assemblies.
Inventors: |
Steenson; Adrian;
(Mississauga, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Darcor Limited |
Toronto |
|
CA |
|
|
Family ID: |
56553776 |
Appl. No.: |
14/611664 |
Filed: |
February 2, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B60B 33/0086 20130101;
B60B 33/0057 20130101; B60B 33/0042 20130101; B60B 33/0002
20130101; B60B 2900/112 20130101; B60B 33/0028 20130101; B60B
33/0068 20130101; B60B 33/02 20130101; B60B 2900/116 20130101 |
International
Class: |
B60B 33/00 20060101
B60B033/00 |
Claims
1. A caster yoke for use in the manufacture of a set of wheeled
caster assemblies, with each wheeled caster assembly of the set of
wheeled caster assemblies having unique functional capabilities
relative to each other wheeled caster assembly of the set, such
unique functional capabilities arising from a respective
configuration of one or more caster components mounted on the
caster yoke, the caster yoke having all of the mounting features
necessary to selectively mount all of the caster components of the
set of wheeled caster assemblies on the caster yoke.
2. A caster yoke for use in the manufacture of a set of wheeled
caster assemblies having a first wheeled caster assembly including
a first caster component, a second wheeled caster assembly
including a second caster component, and a third wheeled caster
assembly including a third caster component, the first wheeled
caster assembly, the second wheeled caster assembly, and the third
wheeled caster assembly each having a unique functional
capabilities relative to each other, the caster yoke comprising: a
first mounting feature configured to selectively mount the first
caster component of the first wheeled caster assembly; a second
mounting feature spaced apart from the first mounting feature, with
the second mounting feature being configured to selectively mount
the second caster component of the second wheeled caster assembly;
and a third mounting feature spaced apart from the first mounting
feature and from the second mounting feature, with the third
mounting feature configured to selectively mount the third caster
component of the third wheeled caster assembly.
3. The caster yoke of claim 2, wherein the caster yoke forms a
unitary body.
4. The caster yoke of claim 2, wherein the caster yoke is a common
element for each member of a set of wheeled assemblies having the
first wheeled caster assembly, the second wheeled caster assembly,
and the third wheeled caster assembly.
5. The caster yoke of claim 2, wherein each mounting feature of the
caster yoke is configured to selectively mount a selected component
of any one of the first wheeled caster assembly, the second wheeled
caster assembly, and the third wheeled caster assembly.
6. The caster yoke of claim 2, wherein the caster yoke includes
mounting features spaced apart from each other, with the mounting
features including: the first mounting feature; the second mounting
feature; the third mounting feature; a fourth mounting feature; a
fifth mounting feature; a sixth mounting feature; a seventh
mounting feature; an eighth mounting feature; a ninth mounting
feature; a tenth mounting feature; and an eleventh mounting
feature.
7. The caster yoke of claim 2, wherein the first mounting feature
includes a post extending from the caster yoke, and the first
mounting feature extending across opposite sidewalls of the caster
yoke.
8. The caster yoke of claim 2, wherein the second mounting feature
includes a hole defined on opposite lateral sidewalls of the caster
yoke at a lower section of the caster yoke, and the second mounting
feature is configured to receive a pin provided by a component of
any one of the first wheeled caster assembly, the second wheeled
caster assembly, and the third wheeled caster assembly.
9. The caster yoke of claim 2, wherein the third mounting feature
includes a slot defined by the caster yoke at a front portion of
the caster yoke, and the third mounting feature being positioned at
a frontal section of the caster yoke.
10. The caster yoke of claim 2, wherein the caster yoke includes a
fourth mounting feature including a hole defined by the caster
yoke, the fourth mounting feature is formed on opposite sidewalls
of the caster yoke in a middle zone of the caster yoke, the fourth
mounting feature extends across opposite lateral sidewalls of the
caster yoke, and the fourth mounting feature is configured to
receive a pin.
11. The caster yoke of claim 2, wherein the caster yoke includes a
fifth mounting feature including a hole defined by the caster yoke
at a middle zone of the caster yoke, the fifth mounting feature
extends between opposite lateral sides of the caster yoke, and the
fifth mounting feature is configured to receive a pin.
12. The caster yoke of claim 2, wherein the caster yoke includes a
sixth mounting feature having a post extending from opposite
lateral sidewalls of the caster yoke at a frontal portion of the
caster yoke.
13. The caster yoke of claim 2, wherein the caster yoke includes a
seventh mounting feature having an elongated slot defined by the
caster yoke, the seventh mounting feature is defined along an
arched portion along a top section of the caster yoke, and the
seventh mounting feature is configured to receive a pin.
14. The caster yoke of claim 2, wherein the caster yoke includes an
eighth mounting feature having a hole defined by the caster yoke,
the eighth mounting feature being located along a bottom rear
section of the caster yoke on opposite sidewalls thereof, and the
eighth mounting feature being configured to receive a pin.
15. The caster yoke of claim 2, wherein the caster yoke includes a
ninth mounting feature having a slot defined by the caster yoke,
and the ninth mounting feature being located between a pair of
posts extending from a lower rear section of the caster yoke.
16. The caster yoke of claim 2, wherein the caster yoke includes a
tenth mounting feature having a notch defined by the caster yoke,
the tenth mounting feature being provided at a lower frontal
section of the caster yoke.
17. The caster yoke of claim 2, wherein the caster yoke includes an
eleventh mounting feature having a cavity defined by the caster
yoke, and the eleventh mounting feature being defined at a rear
lower section of the caster yoke.
18. A set of wheeled caster assemblies, comprising: a caster yoke
including a first mounting feature, a second mounting feature
spaced apart from the first mounting feature, and a third mounting
feature spaced apart from the first mounting feature and from the
second mounting feature; a first wheeled caster assembly including
a first caster component configured to selectively mount the first
mounting feature of the caster yoke; a second wheeled caster
assembly including a second caster component configured to
selectively mount the second mounting feature of the caster yoke;
and a third wheeled caster assembly including a third caster
component configured to selectively mount the third mounting
feature of the caster yoke; and the first wheeled caster assembly,
the second wheeled caster assembly, and the third wheeled caster
assembly each have a unique functional capability relative to each
other.
Description
TECHNICAL FIELD
[0001] The present invention relates to the field of wheeled caster
assemblies and more particularly, according to one aspect of the
invention, to a caster yoke that can be used to manufacture a set
of wheeled caster assemblies with each member of the set having
unique functional capabilities, all without the need to modify the
caster yoke.
BACKGROUND OF THE INVENTION
[0002] Wheeled caster assemblies are generally well known in the
art. Such wheeled casters are attached to a base or to the bottom
of an object such as a bed, a stretcher, a gurney, a chair, a large
piece of medical diagnostic equipment, a palette, a wagon, a cart,
and the like. Wheeled caster assemblies are configured to provide
translation (rolling movement) of the object along a surface or the
ground (once attached to the object just so). In some
configurations, the wheel(s) of the caster assembly may be fixed in
a single orientation relative to the attached object to provide
motion in a single forward and backward direction. In other
configurations, the caster assembly includes a swivel that allows
the caster assembly to rotate about a vertical axis. If all caster
assemblies attached to the object are of this configuration, the
object to which the caster assembly is attached is able to move in
a lateral as well as a forward and backward motion. Different
configurations are also well known with combinations of fixed and
swivel-enabled caster assemblies attached to a single object.
[0003] Wheel brake and swivel brake assemblies for casters are also
well known and have been provided in a variety of forms for many
years. A wheel brake assembly is typically used to stop the motion
of the wheel, such that the wheel is no longer able to rotate about
a respective wheel axis. Wheel brake assemblies are often engaged
when a user wishes the object to remain in a fixed position. If the
caster assembly has a swivel function, the object may still be able
to rotate about the wheel-braked caster assembly eventhough the
wheel itself is not able to rotate.
[0004] Similarly, swivel brake assemblies have been designed to
lock a swivel-enabled caster assembly in a fixed orientation such
that the caster assembly is unable to swivel about the vertical
axis. Swivel brake assemblies are commonly used when a user wishes
to translate the object in a fixed direction, such as forward or
backwards relative to the object, without having to exert the
additional effort to steer. As only the swivel has been affected,
the wheel of the caster assembly is still free to rotate about the
wheel axis. Furthermore, objects having fixed caster assemblies
oriented in the same direction will generally travel in a straight
line.
[0005] Finally, a combination of a wheel brake and swivel brake
assemblies in a caster assembly are known to simultaneously engage
a wheel brake and a swivel brake using a single stopping actuator.
With such a single actuator, the user is able with a single motion
able to stop both the rotation of the caster assembly's wheel about
the wheel axis and to stop the rotation of the swivel about the
vertical axis.
[0006] While various combinations of these wheel and swivel brake
assemblies and their associated functionalities are required in the
art, each combination typically presents a challenge to combine
together into a caster assembly that meets the space, actuation and
service requirements of modern equipment manufacturers who
incorporate caster assemblies into their products. As a result, it
is required, in many cases, to custom design the various components
of a caster assembly to meet the unique functional requirements of
such manufacturers. That is, for example, a wheeled caster assembly
required to have both a wheel brake lock assembly and a
fixed-direction swivel lock assembly will, in the prior art, be
constructed from caster components that may be significantly
different than the caster components used to construct a unique
caster assembly configuration having all three of a wheel brake
lock assembly, a fixed-direction swivel lock assembly and a
full-directional swivel lock assembly.
[0007] One prior art wheeled caster assembly having caster
components used to construct a unique caster configuration having a
wheel brake lock assembly, a fixed-direction swivel lock assembly,
and a full-directional swivel lock assembly is disclosed in U.S.
Pat. No. 8,424,158 (Steenson), which patent is hereby incorporated
by reference. The wheeled caster assembly disclosed in U.S. Pat.
No. 8,424,158 includes a caster yoke and a cam assembly operable in
at least three operational (functional) states (modes). The cam
assembly may include an actuating mechanism for operating the cam
assembly, a swivel lever mechanism and a brake lever mechanism in
communication with a cam. When in a first operational (functional)
state (mode), the wheel rotates freely and the caster yoke swivels
freely. When in a second operational (functional) state (mode), a
first swivel brake is engaged by the swivel lever mechanism to lock
the caster yoke in a predetermined orientation while the wheel is
allowed to rotate freely. When in a third operational (functional)
state (mode), a wheel brake is engaged by the brake lever mechanism
to stop the wheel from rotating freely, and a second swivel brake
is simultaneously engaged to stop the caster yoke from swivelling.
While operatively effective in its various operational (functional)
states (modes), it will be appreciated by those skilled in the art
that the Steenson prior art caster assembly is both complex and
expensive to manufacture. Most importantly, such high levels of
complexity and expense cannot be justified for many applications
where less operational (functional) states (modes) are required.
Moreover, the Steenson prior art caster assembly is not readily
adaptable to the production of caster assemblies having less
operational (functional) states (modes) without extensive redesign
of the various caster components utilized therein and of the
associated tooling, facilities and other resources necessary to
produce assemble and inventory such components. As a consequence,
in order for a caster manufacturer to be able to offer its
customers a full model line (set) of casters capable of offering
all of the three different operational (functional) capabilities
described above in their various combinations and permutations, it
would be necessary for such manufacturer to construct and inventory
as many as 9 different unique caster models, each having a
plurality of parts unique to each model of the line (set).
[0008] Reducing the cost of manufacturing wheeled caster assemblies
having different functionalities and inventorying the numerous
different castor components used in their production represents an
ongoing challenge for manufacturing efficiencies in response to
continuing customer demands for reduced costs. Accordingly, there
remains a need in the art for an improved and more economical
wheeled caster assembly that may be produced from common caster
components and that may be assembled in selected combinations to
form a set of wheeled caster assemblies each having unique
operational (functional) capabilities.
SUMMARY OF THE INVENTION
[0009] It will be appreciated that there exists a need to mitigate
(at least in part) at least one problem associated with existing
wheeled caster assemblies. After much study of the known systems
and methods with experimentation, and an understanding of the
problem, its solution has been identified and is articulated
hereinbelow.
[0010] To mitigate, at least in part, one or more problems
associated with prior art wheeled caster assemblies, there is
provided in accordance with an aspect of the present invention a
novel and unobvious form of caster yoke, which caster yoke may be
used to manufacture a complete set of wheeled caster assemblies,
with each wheeled caster assembly of the set having unique
functional capabilities, either alone or in combination with other
unique functional capabilities, relative to each other wheeled
caster assembly of the set. Each of these functional capabilities
arises, in turn, from respective configurations of castor
components being mountable on the caster yoke, with the caster yoke
having all of the mounting features necessary to selectively mount
all of the caster components of the set of wheeled caster
assemblies on the caster yoke.
[0011] To mitigate, at least in part, at least one problem
associated with existing wheeled caster assemblies, there is
provided in accordance with another aspect of the present invention
a caster yoke. The caster yoke is for constructing a set of wheeled
caster assemblies. Each wheeled caster assembly of the set of
wheeled caster assemblies has a unique functional capabilities
relative to each other. The caster yoke includes (and is not
limited to) mounting features. The mounting features are each (each
mounting feature is) configured to selectively mount respective
caster components of wheeled caster assemblies of the set of
wheeled caster assemblies.
[0012] To mitigate, at least in part, at least one problem
associated with existing wheeled caster assemblies, there is
provided (in accordance with another aspect of the present
invention a caster yoke for constructing a set of wheeled caster
assemblies. For instance, the set of wheeled caster assemblies has
(and is not limited to): (A) a first wheeled caster assembly
including (and not limited to) a first caster component; (B) a
second wheeled caster assembly including (and not limited to) a
second caster component; and, (C) a third wheeled caster assembly
including (and not limited to) a third caster component. The first
wheeled caster assembly, the second wheeled caster assembly, and
the third wheeled caster assembly each have unique functional
capabilities relative to each other (once the caster yoke is
deployed therein). The caster yoke includes (and is not limited
to): a first mounting feature, a second mounting feature, and a
third mounting feature. The first mounting feature is configured to
selectively mount the first caster component of the first wheeled
caster assembly. The second mounting feature is spaced apart from
the first mounting feature. The second mounting feature is
configured to selectively mount the second caster component of the
second wheeled caster assembly. The third mounting feature is
spaced apart from the first mounting feature and also from the
second mounting feature. The third mounting feature is configured
to selectively mount the third caster component of the third
wheeled caster assembly. The set of wheeled caster assemblies
includes (and is not limited to) a caster yoke, a first wheeled
caster assembly, a second wheeled caster assembly, and a third
wheeled caster assembly. The caster yoke includes (and is not
limited to) a first mounting feature, a second mounting feature,
and a third mounting feature. The second mounting feature is spaced
apart from the first mounting feature. The third mounting feature
is spaced apart from the first mounting feature and also from the
second mounting feature. The first wheeled caster assembly includes
(and is not limited to) a first caster component configured to
selectively mount the first mounting feature of the caster yoke.
The second wheeled caster assembly includes (and is not limited to)
a second caster component configured to selectively mount the
second mounting feature of the caster yoke. The third wheeled
caster assembly includes (and is not limited to) a third caster
component configured to selectively mount the third mounting
feature of the caster yoke. The first wheeled caster assembly, the
second wheeled caster assembly, and the third wheeled caster
assembly each having unique functional capabilities relative to
each other.
[0013] Other aspects of the invention are identified in the
claims.
[0014] Other aspects and features of the non-limiting embodiments
may now become apparent to those skilled in the art upon review of
the following detailed description of the non-limiting embodiments
with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The non-limiting embodiments may be more fully appreciated
by reference to the following detailed description of the
non-limiting embodiments when taken in conjunction with the
accompanying drawings, in which:
[0016] FIGS. 1A, 1B and 1C (SHEETS 1 TO 3 OF 16 SHEETS) depict
perspective views of embodiments of a set of wheeled caster
assemblies having a first wheeled caster assembly (depicted in FIG.
1A), a second wheeled caster assembly (depicted in FIG. 1B), and a
third wheeled caster assembly (depicted in FIG. 1C);
[0017] FIGS. 2A, 2B, 2C, 2D and 2E (SHEETS 4 TO 8 OF 16 SHEETS)
depict different views of a caster yoke commonly deployed with
(used in the construction of) any one of the first wheeled caster
assembly, the second wheeled caster assembly and the third wheeled
caster assembly of FIGS. 1A, 1B and 1C. FIG. 2A depicts a front
perspective view. FIG. 2B depicts a side view. FIG. 2C depicts a
rear perspective view. FIG. 2D depicts a bottom perspective view.
FIG. 2E depicts a top view.
[0018] FIGS. 3A to 3D (SHEETS 9 TO 12 OF 16 SHEETS) depict views of
the first wheeled caster assembly of FIG. 1A which includes the
caster yoke of FIGS. 2A, 2B, 2C, 2D and 2E;
[0019] FIGS. 4A and 4B (SHEETS 13 AND 14 OF 16 SHEETS) depict views
of the second wheeled caster assembly of FIG. 1B, and the second
wheeled caster assembly includes the caster yoke of FIGS. 2A, 2B,
2C, 2D and 2E. FIG. 4A depicts an exploded view. FIG. 4B depicts a
side view;
[0020] FIGS. 5A and 5B (SHEETS 15 AND 16 OF 16 SHEETS) depict views
of embodiments of the third wheeled caster assembly of FIG. 1C, and
the third wheeled caster assembly includes the caster yoke of FIGS.
2A, 2B, 2C, 2D and 2E. FIG. 5A depicts an exploded view. FIG. 5B
depicts a side view.
[0021] The drawings are not necessarily to scale and may be
illustrated by phantom lines, diagrammatic representations and
fragmentary views. In certain instances, details unnecessary for an
understanding of the embodiments (and/or details that render other
details difficult to perceive) may have been omitted.
[0022] Corresponding reference characters indicate corresponding
components throughout the several figures of the drawings. Elements
in the several figures are illustrated for simplicity and clarity
and have not been drawn to scale. The dimensions of some of the
elements in the figures may be emphasized relative to other
elements for facilitating an understanding of the various disclosed
embodiments. In addition, common, but well-understood, elements
that are useful or necessary in commercially feasible embodiments
are often not depicted to provide a less obstructed view of the
embodiments of the present disclosure.
[0023] LISTING OF REFERENCE NUMERALS USED IN THE DRAWINGS
[0024] 101 first mounting feature
[0025] 102 second mounting feature
[0026] 103 third mounting feature
[0027] 104 fourth mounting feature
[0028] 105 fifth mounting feature
[0029] 106 sixth mounting feature
[0030] 107 seventh mounting feature
[0031] 108 eighth mounting feature
[0032] 109 ninth mounting feature
[0033] 110 tenth mounting feature
[0034] 111 eleventh mounting feature
[0035] 112 caster yoke
[0036] 300 first wheeled caster assembly
[0037] 301 first caster component
[0038] 302 second caster component
[0039] 303 third caster component
[0040] 304 fourth caster component
[0041] 305 fifth caster component
[0042] 306 sixth caster component
[0043] 307 seventh caster component
[0044] 308 eighth caster component
[0045] 309 ninth caster component
[0046] 310 tenth caster component
[0047] 311 eleventh caster component
[0048] 312 twelfth caster component
[0049] 313 thirteenth caster component
[0050] 314 fourteenth caster component
[0051] 315 fifteenth caster component
[0052] 316 sixteenth caster component
[0053] 317 seventeenth caster component
[0054] 318 eighteenth caster component
[0055] 319 nineteenth caster component
[0056] 320 twentieth caster component
[0057] 321 twenty-first caster component
[0058] 322 twenty-second caster component
[0059] 323 twenty-third caster component
[0060] 324 twenty-fourth caster component
[0061] 325 twenty-fifth caster component
[0062] 326 twenty-sixth caster component
[0063] 327 twenty-seventh caster component
[0064] 328 twenty-eighth caster component
[0065] 400 second wheeled caster assembly
[0066] 401 first caster component
[0067] 402 second caster component
[0068] 403 third caster component
[0069] 404 fourth caster component
[0070] 405 fifth caster component
[0071] 406 sixth caster component
[0072] 407 seventh caster component
[0073] 408 eighth caster component
[0074] 409 ninth caster component
[0075] 410 tenth caster component
[0076] 411 eleventh caster component
[0077] 412 twelfth caster component
[0078] 413 thirteenth caster component
[0079] 500 third wheeled caster assembly
[0080] 501 first caster component
[0081] 502 second caster component
[0082] 503 third caster component
[0083] 504 fourth caster component
[0084] 505 fifth caster component
[0085] 506 sixth caster component
[0086] 507 seventh caster component
[0087] 508 eighth caster component
[0088] 509 ninth caster component
[0089] 510 tenth caster component
[0090] 511 eleventh caster component
DETAILED DESCRIPTION OF THE NON-LIMITING EMBODIMENT(S)
[0091] The following detailed description is merely exemplary and
is not intended to limit the described embodiments or the
application and uses of the described embodiments. As used, the
word "exemplary" or "illustrative" means "serving as an example,
instance, or illustration." Any implementation described as
"exemplary" or "illustrative" is not necessarily to be construed as
preferred or advantageous over other implementations. All of the
implementations described below are exemplary implementations
provided to enable persons skilled in the art to make or use the
embodiments of the disclosure and are not intended to limit the
scope of the disclosure. The scope of the invention is defined by
the claims. For the description, the terms "upper," "lower,"
"left," "rear," "right," "front," "vertical," "horizontal," and
derivatives thereof shall relate to the examples as oriented in the
drawings. There is no intention to be bound by any expressed or
implied theory in the preceding Technical Field, Background,
Summary or the following detailed description. It is also to be
understood that the devices and processes illustrated in the
attached drawings, and described in the following specification,
are exemplary embodiments (examples), aspects and/or concepts
defined in the appended claims. Hence, dimensions and other
physical characteristics relating to the embodiments disclosed are
not to be considered as limiting, unless the claims expressly state
otherwise. It is understood that the phrase "at least one" is
equivalent to "a". The aspects (examples, alterations,
modifications, options, variations, embodiments and any equivalent
thereof) are described regarding the drawings. It should be
understood that the invention is limited to the subject matter
provided by the claims, and that the invention is not limited to
the particular aspects depicted and described.
[0092] FIGS. 1A, 1B and 1C depict views of embodiments of a set of
wheeled caster assemblies having a first wheeled caster assembly
300 (depicted in FIG. 1A), a second wheeled caster assembly 400
(depicted in FIG. 1B), and a third wheeled caster assembly 500
(depicted in FIG. 1C). FIG. 1A depicts a perspective view. FIG. 1B
depicts a perspective view. FIG. 1C depicts a perspective view.
[0093] The first wheeled caster assembly 300, the second wheeled
caster assembly 400, and the third wheeled caster assembly 500 are
members of the set of wheeled caster assemblies. Each of the first
wheeled caster assembly 300, the second wheeled caster assembly
400, and the third wheeled caster assembly 500 includes a caster
yoke 112, which is depicted in any one of FIGS. 2A to 2E. The
caster yoke is preferably formed (from a metal alloy, for instance)
as a unitary body. The caster yoke 112 is a common element of
(deployed in) each member of the set of wheeled assemblies. A
technical effect (result or benefit) of using the same caster yoke
112 to form a set of wheeled caster assemblies is a reduction, at
least in part, in the cost of manufacturing any one of the first
wheeled caster assembly 300, the second wheeled caster assembly
400, and the third wheeled caster assembly 500 using different
caster yokes, as is the custom in the prior art.
[0094] It will be appreciated that by allowing selected
wheeled-caster components to be selectively mounted on the same
caster yoke structure 112, various types of wheeled-caster
structures having corresponding wheeled-caster functions may be
constructed. Such functions may include, without limitation, wheel
braking to stop the rotation of the wheel(s) of the caster assembly
about its rotational axis, and swivel braking to allow the caster
assembly to selectively rotate about a vertical axis.
[0095] Thus, by using utilizing the same caster yoke 112 for
different types of wheeled caster assemblies, the cost of
manufacturing these different types of wheeled caster assemblies
(such as, the first wheeled caster assembly 300 depicted in FIG.
3A, the second wheeled caster assembly 400 depicted in FIG. 4A, and
the third wheeled caster assembly 500 depicted in FIG. 5A) may be
reduced (at least in part), since these wheeled caster assemblies
share the same form of caster yoke 112. By deploying the same form
of caster yoke 112 in each of the different wheeled caster
assemblies, each of the wheeled caster assemblies does not need a
separately designed and constructed (and stocked) caster yoke,
which caster yoke is a key component in the construction of wheeled
caster assemblies and potentially the largest, heaviest and most
expensive component of each such caster assembly. Accordingly, the
caster yoke 112 permits unique functional capabilities for
different sorts of wheeled caster assemblies (depending on the
functionality desired for a particular wheeled caster assembly). In
this manner, the caster yoke 112 may be deployed to construct a set
of wheeled caster assemblies that has a relatively large number of
possible wheeled-caster functions. It will be appreciated that by
changing the structure (using selected wheeled-caster components)
to be attached (fixed) to (mounted on) the caster yoke 112, various
types of wheeled-caster structures having corresponding wheeled
caster functions can be selectively constructed (manufactured).
Alternatively, the caster yoke 112 may be deployed in a wheeled
caster assembly that has a relatively few number of wheeled-caster
functions (such as a single wheeled-caster function), if so
desired.
[0096] The first wheeled caster assembly 300, the second wheeled
caster assembly 400 and the third wheeled caster assembly 500 are
configured to be selectively attached (coupled, fixedly attached
either directly or indirectly) to an object (known and not
depicted) once selectively connected to the underside of the
object. In this manner, the first wheeled caster assembly 300, the
second wheeled caster assembly 400 and the third wheeled caster
assembly 500 are configured to enable the object to be moved (along
a working surface). Embodiments of the object include (and are not
limited to) a bed, a stretcher, a gurney, an office chair, a large
piece of medical diagnostic equipment, a palette, a wagon, a cart,
and the like.
[0097] The first wheeled caster assembly 300, the second wheeled
caster assembly 400, and the third wheeled caster assembly 500
preferably each have unique functional capabilities relative to
each other.
[0098] In accordance with a first major aspect (as depicted in
FIGS. 2A to 2E), the caster yoke 112 is for construction of a set
of wheeled caster assemblies (as depicted in, for example, FIGS.
1A, 1B and 1C). The set of wheeled caster assemblies includes (and
is not limited to) the first wheeled caster assembly 300 of FIG.
1A, the second wheeled caster assembly 400 of FIG. 1B, and the
third wheeled caster assembly 500 of FIG. 1C. Each wheeled caster
assembly shares the caster yoke 112 and each member of the set of
wheeled caster assemblies has a unique functional capability
relative to each other member of the set. The caster yoke 112
includes mounting features (such as, a first mounting feature 101,
a second mounting feature 102 and a third mounting feature 103,
etc.). The mounting features of the caster yoke 112 are each
configured to fit (selectively connect, selectively interface,
couple, etc.), and any equivalent thereof, with respective caster
components of the wheeled caster assemblies 300, 400, 500 as
depicted in FIGS. 1A, 1B, and 1C, respectively, which belong to the
set of wheeled caster assemblies.
[0099] Referring to the embodiment depicted in FIG. 3B, a first
mounting feature 101 of the caster yoke 112 is configured to
selectively mount a first caster component 301 of the first wheeled
caster assembly 300.
[0100] Referring to the embodiment depicted in FIG. 4B, a second
mounting feature 102 of the caster yoke 112 is spaced apart from
the first mounting feature 101. The second mounting feature 102 is
configured to selectively mount a second caster component 402 of
the second wheeled caster assembly 400.
[0101] Referring to the embodiment depicted in FIG. 5B, a third
mounting feature 103 of the caster yoke 112 is spaced apart from
the first mounting feature 101 and is also spaced apart from the
second mounting feature 102. The third mounting feature 103 is
configured to selectively mount a third caster component 503 of the
third wheeled caster assembly 500.
[0102] Referring to the embodiments depicted in FIGS. 2A to 2E (in
general terms), each of the mounting features 101 to 111 of the
caster yoke 112 is configured to selectively fit (interface,
receive, interact) with a selected component of any one of the
wheeled caster assemblies 300, 400, 500 (depicted in FIGS. 1A, 1B,
and 1C, respectively).
[0103] Specifically, the caster yoke 112 includes (provides)
mounting features that are spaced apart from each other. The
mounting features of caster yoke 112 include (and are not limited
to): a first mounting feature 101, a second mounting feature 102, a
third mounting feature 103, a fourth mounting feature 104, a fifth
mounting feature 105, a sixth mounting feature 106, a seventh
mounting feature 107, an eighth mounting feature 108, a ninth
mounting feature 109, a tenth mounting feature 110, and an eleventh
mounting feature 111.
[0104] It will be appreciated that the first mounting feature 101
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The first mounting feature 101 is
configured to selectively mount a component of the first wheeled
caster assembly 300 (as depicted in FIG. 3B). For instance, the
first mounting feature 101 includes a post (also called a pin
extension, a protuberance, etc.), and any equivalent thereof,
extending from the caster yoke 112. The first mounting feature 101
extends across opposite sidewalls of the caster yoke 112.
[0105] It will be appreciated that the second mounting feature 102
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The second mounting feature 102
is configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3B). The second mounting feature 102 is
configured to selectively mount a component of the second wheeled
caster assembly 400 (FIG. 4B). For instance, the second mounting
feature 102 includes a hole (a shaped void), and any equivalent
thereof, defined on (formed in) opposite lateral sidewalls of the
caster yoke 112 at a lower section of the caster yoke 112. The
second mounting feature 102 is configured to receive a pin (a rod,
a pin extension, etc.), and any equivalent thereof, provided by the
component of any one of the first wheeled caster assembly 300 (FIG.
3A) or the second wheeled caster assembly 400 (FIG. 4A).
[0106] It will be appreciated that the third mounting feature 103
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The third mounting feature 103 is
configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3C). The third mounting feature 103 is
configured to selectively mount a component of the second wheeled
caster assembly 400 (FIG. 4B). The third mounting feature 103 is
configured to selectively mount a component of the third wheeled
caster assembly 500 (FIG. 5B). For instance, the third mounting
feature 103 includes a slot, and any equivalent thereof, defined by
(formed in) the caster yoke 112 (at a front portion of the caster
yoke 112). The third mounting feature 103 is positioned at a
frontal section of the caster yoke 112.
[0107] It will be appreciated that the fourth mounting feature 104
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The fourth mounting feature 104
is configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3B). For instance, the fourth mounting
feature 104 includes a hole, and any equivalent thereof, defined by
(formed in) the caster yoke 112. The fourth mounting feature 104 is
formed on opposite sidewalls of the caster yoke 112 in a middle
zone of the caster yoke 112. The fourth mounting feature 104
extends across opposite lateral sidewalls of the caster yoke 112.
The fourth mounting feature 104 is configured to receive a pin
(rod, pin extension), and any equivalent thereof.
[0108] It will be appreciated that the fifth mounting feature 105
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The fifth mounting feature 105 is
configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3B). For instance, the fifth mounting
feature 105 includes a hole, and any equivalent thereof, defined by
(formed in) the caster yoke 112 (at a middle zone of the caster
yoke 112). The fifth mounting feature 105 extends between opposite
lateral sides (the opposite lateral sidewalls) of the caster yoke
112. The fifth mounting feature 105 is configured to receive a pin
(a rod), and any equivalent thereof.
[0109] It will be appreciated that the sixth mounting feature 106
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The sixth mounting feature 106 is
configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3C). For instance, the sixth mounting
feature 106 includes a post, and any equivalent thereof, extending
from the opposite lateral sidewalls of the caster yoke 112 at a
frontal portion of the caster yoke 112.
[0110] It will be appreciated that the seventh mounting feature 107
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The seventh mounting feature 107
is configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3C). For instance, the seventh mounting
feature 107 includes an elongated slot, and any equivalent thereof,
defined by (formed in) the caster yoke 112. The seventh mounting
feature 107 is defined along an arched portion along a top section
of the caster yoke 112. The seventh mounting feature 107 is
configured to receive a pin (a rod, a pin extension), and any
equivalent thereof. The seventh mounting feature 107 is located
above the sixth mounting feature 106.
[0111] It will be appreciated that the eighth mounting feature 108
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The eighth mounting feature 108
is configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3C). For instance, the eighth mounting
feature 108 includes a hole, and any equivalent thereof, defined by
(formed in) the caster yoke 112. The eighth mounting feature 108 is
located along a bottom rear section of the caster yoke 112 on the
opposite sidewalls thereof. The eighth mounting feature 108 is
configured to receive a pin (a rod, a pin extension), and any
equivalent thereof. The eighth mounting feature 108 is located
rearward of the fourth mounting feature 104 along a lower rear zone
of the caster yoke 112.
[0112] It will be appreciated that the ninth mounting feature 109
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The ninth mounting feature 109 is
configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3C). The ninth mounting feature 109 is
configured to selectively mount a component of the second wheeled
caster assembly 400 (FIG. 4B). For instance, the ninth mounting
feature 109 includes a slot, and any equivalent thereof, defined by
(formed in) the caster yoke 112. The ninth mounting feature 109 is
located between a pair of posts extending from a lower rear section
of the caster yoke 112. The ninth mounting feature 109 is located
behind the fourth mounting feature 104 along a lower rear zone of
the caster yoke 112.
[0113] It will be appreciated that the tenth mounting feature 110
may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The tenth mounting feature 110 is
configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3D). For instance, the tenth mounting
feature 110 includes a notch, and any equivalent thereof, defined
by (formed in) the caster yoke 112. The tenth mounting feature 110
is provided at a lower frontal section of the caster yoke 112. The
tenth mounting feature 110 is located below the sixth mounting
feature 106 along a lower edge of the caster yoke 112.
[0114] It will be appreciated that the eleventh mounting feature
111 may be utilized by any one of the wheeled caster assemblies (as
depicted in FIGS. 1A, 1B and 1C). The eleventh mounting feature 111
is configured to selectively mount a component of the first wheeled
caster assembly 300 (FIG. 3D). The eleventh mounting feature 111 is
configured to selectively mount a component of the second wheeled
caster assembly 400 (FIG. 4B). The eleventh mounting feature 111 is
configured to selectively mount a component of the third wheeled
caster assembly 500 (FIG. 5B). For instance, the eleventh mounting
feature 111 includes a cavity, and any equivalent thereof, defined
by (formed in) the caster yoke 112. The eleventh mounting feature
111 is defined at a rear lower section of the caster yoke 112. The
eleventh mounting feature 111 is located above the ninth mounting
feature 109.
[0115] FIGS. 3A to 3D depict views of embodiments of the first
wheeled caster assembly 300 of FIG. 1A. The first wheeled caster
assembly 300 includes the caster yoke 112 of any one of FIGS. 2A,
2B, 2C, 2D and 2E. FIG. 3A depicts an exploded view. FIG. 3B
depicts a side view. FIG. 3C depicts a frontal perspective view.
FIG. 3D depicts a rear perspective view.
[0116] The first wheeled caster assembly 300 includes a first
caster component 301 (as depicted in FIGS. 3A and 3B). The caster
yoke 112 includes the first mounting feature 101 (as depicted in
FIGS. 2A, 2B, 2C, 2D, and 3B) configured to selectively mount the
first caster component 301 of the first wheeled caster assembly
300.
[0117] In accordance with an embodiment, the components of the
first wheeled caster assembly 300 further include the first caster
component 301, a second caster component 302, a third caster
component 303 (such as, a wheel or a pair of wheels), a fourth
caster component 304, a fifth caster component 305, a sixth caster
component 306, a seventh caster component 307, an eighth caster
component 308, a ninth caster component 309, a tenth caster
component 310, an eleventh caster component 311, a twelfth caster
component 312, a thirteenth caster component 313, a fourteenth
caster component 314, a fifteenth caster component 315, a sixteenth
caster component 316, a seventeenth caster component 317, an
eighteenth caster component 318, a nineteenth caster component 319,
a twentieth caster component 320, a twenty-first caster component
321, a twenty-second caster component 322, a twenty-third caster
component 323, a twenty-fourth caster component 324, a twenty-fifth
caster component 325, a twenty-sixth caster component 326, a
twenty-seventh caster component 327, and a twenty-eighth caster
component 328.
[0118] For instance, the first caster component 301 may include a
main-cam pin. The first caster component 301 is configured to
selectively mount the first mounting feature 101 of the caster yoke
112. For instance, the second caster component 302 may include a
top plate assembly. For instance, the third caster component 303
may include a wheel assembly. The fourth caster component 304 may
include a trim cover assembly. The fourth caster component 304 is
configured to selectively mount the eleventh mounting feature 111
of the caster yoke 112. For instance, the fifth caster component
305 may include a bushing assembly. For instance, the sixth caster
component 306 may include a flanged-bushing assembly (for the
eighth caster component 308). For instance, the seventh caster
component 307 may include a brake-arm pin. For instance, the eighth
caster component 308 may include a brake-arm assembly. The eighth
caster component 308 is configured to selectively mount the tenth
mounting feature 110 of the caster yoke 112. The ninth caster
component 309 may include a pin assembly. The ninth caster
component 309 is configured to selectively mount the fifth mounting
feature 105 of the caster yoke 112. The tenth caster component 310
includes a flanged bushing. The eleventh caster component 311
includes a main cam. The eleventh caster component 311 is
configured to selectively mount the fifth mounting feature 105 of
the caster yoke 112. The twelfth caster component 312 may include a
center-locking cam. The thirteenth caster component 313 includes a
brake cam. The fourteenth caster component 314 may include a
center-lock bushing. The fifteenth caster component 315 includes a
center-locking pin. The fifteenth caster component 315 is
configured to selectively mount the eighth mounting feature 108 of
the caster yoke 112. The sixteenth caster component 316 may include
a center-locking spring. The seventeenth caster component 317
includes a torsion spring. The eighteenth caster component 318 may
include a brake-system frame. The eighteenth caster component 318
is configured to selectively mount the fourth mounting feature 104
of the caster yoke 112. The nineteenth caster component 319 may
include a push cam. The twentieth caster component 320 includes a
push-cam spring. The twenty-first caster component 321 may include
a push-cam pin. The twenty-second caster component 322 may include
a brake pedal. The twenty-second caster component 322 is configured
to selectively mount the seventh mounting feature 107 of the caster
yoke 112. The twenty-third caster component 323 includes a
connector (a bolt). The twenty-fourth caster component 324 includes
a washer. The twenty-fifth caster component 325 may include a
locating washer. The twenty-sixth caster component 326 my include a
bearing assembly. The twenty-seventh caster component 327 may
include a retainer (retaining ring). The twenty-eighth caster
component 328 may include a center-lock bracket.
[0119] FIGS. 4A and 4B depict views of embodiments of the second
wheeled caster assembly 400 of FIG. 1B. The second wheeled caster
assembly 400 also includes the caster yoke 112 of any one of FIGS.
2A, 2B, 2C, 2D and 2E. FIG. 4A depicts an exploded view. FIG. 4B
depicts a side view.
[0120] The second wheeled caster assembly 400 includes a second
caster component 402 (as depicted in FIGS. 4A and 4B). The caster
yoke 112 includes the second mounting feature 102 (as depicted in
FIGS. 2A, 2B, 2C, 2D and 4B) spaced apart from the first mounting
feature 101. The second mounting feature 102 is configured to
selectively mount the second caster component 402 of the second
wheeled caster assembly 400.
[0121] The components of the second wheeled caster assembly 400
further include a first caster component 401, a second caster
component 402, a third caster component 403, a fourth caster
component 404, a fifth caster component 405, a sixth caster
component 406, a seventh caster component 407, an eighth caster
component 408, a ninth caster component 409, a tenth caster
component 410, an eleventh caster component 411, a twelfth caster
component 412, and a thirteenth caster component 413.
[0122] The first caster component 401 may include a stem assembly.
The second caster component 402 may include a spring pin assembly.
The second caster component 402 is configured to selectively mount
the second mounting feature 102 of the caster yoke 112. The second
caster component 402 is configured to selectively mount the ninth
mounting feature 109 of the caster yoke 112. The third caster
component 403 may include a cover assembly. The third caster
component 403 is configured to selectively mount the eleventh
mounting feature 111 of the caster yoke 112. The fourth caster
component 404 may include a bearing assembly. The fifth caster
component 405 includes a wheel assembly. The sixth caster component
406 may include a lever assembly. The seventh caster component 407
includes a bushing assembly. The eighth caster component 408 may
include a retaining ring. The ninth caster component 409 may
include a brake arm. The tenth caster component 410 includes a nut.
The eleventh caster component 411 may include a washer. The twelfth
caster component 412 includes a set screw. The thirteenth caster
component 413 may include a spring assembly.
[0123] FIGS. 5A and 5B depict views of embodiments of the third
wheeled caster assembly 500 of FIG. 1C. The third wheeled caster
assembly 500 includes the caster yoke 112 of any one of FIGS. 2A,
2B, 2C, 2D and 2E. FIG. 5A depicts an exploded view. FIG. 5B
depicts a side view.
[0124] The third wheeled caster assembly 500 includes a third
caster component 503 (as depicted in FIGS. 5A and 5B). The caster
yoke 112 may include the third mounting feature 103 (as depicted in
FIGS. 2A, 2C, 2D and 5B) spaced apart from the first mounting
feature 101 and from the second mounting feature 102. The third
mounting feature 103 is configured to selectively mount the third
caster component 503 of the third wheeled caster assembly 500.
[0125] The components of the third wheeled caster assembly 500
further includes a first caster component 501, a second caster
component 502, a third caster component 503, a fourth caster
component 504, a fifth caster component 505, a sixth caster
component 506, a seventh caster component 507, an eighth caster
component 508, a ninth caster component 509, a tenth caster
component 510, and an eleventh caster component 511.
[0126] The first caster component 501 may include a post assembly.
The second caster component 502 may include a wheel assembly. The
third caster component 503 may include a cover assembly. The third
caster component 503 is configured to selectively mount the third
mounting feature 103 of the caster yoke 112. The third mounting
feature 103 is configured to selectively fit with and to
selectively mount a selected component of any one of the wheeled
caster assemblies 300, 400, 500. The fourth caster component 504
may include a set screw. The fifth caster component 505 may include
a washer. The sixth caster component 506 may include a nut. The
seventh caster component 507 may include a set screw. The eighth
caster component 508 may include a brake arm.
[0127] The ninth caster component 509 may include a bushing
assembly. The tenth caster component 510 may include a retaining
ring. The eleventh caster component 511 may include a set
screw.
[0128] This written description uses examples to disclose the
invention, including the best mode, and also to enable any person
skilled in the art to make and use the invention. The patentable
scope of the invention is defined by the claims, and may include
other examples that occur to those skilled in the art. Such other
examples are within the scope of the claims if they have structural
elements that do not differ from the literal language of the
claims, or if they include equivalent structural elements with
insubstantial differences from the literal language of the
claims.
[0129] It may be appreciated that the assemblies, components, and
modules described above may be connected with each other as
required to perform desired functions and tasks within the scope of
persons of skill in the art to make such combinations and
permutations without having to describe each and every one in
explicit terms. There is no particular assembly or component that
may be superior to any of the equivalents available to the person
skilled in art. There is no particular mode of practicing the
disclosed subject matter that is superior to others, so long as the
functions may be performed. It is believed that all the crucial
aspects of the disclosed subject matter have been provided in this
document. It is understood that the scope of the present invention
is limited to the scope provided by the independent claim(s), and
it is also understood that the scope of the present invention is
not limited to: (i) the dependent claims, (ii) the detailed
description of the non-limiting embodiments, (iii) the summary,
(iv) the abstract, and/or (v) the description provided outside of
this document (that is, outside of the instant application as
filed, as prosecuted, and/or as granted). It is understood, for
this document, that the phrase "includes" is equivalent to the word
"comprising." The foregoing has outlined the non-limiting
embodiments (examples). The description is made for particular
non-limiting embodiments (examples). It is understood that the
non-limiting embodiments are merely illustrative as examples.
* * * * *