Luggage case having a detachable roller assembly

A luggage case is disclosed that includes a roller assembly that is detachably secured to a section of the luggage case, wherein a roller engages a surface to enable the luggage case to be conveniently rolled thereover. The roller assembly is mounted such that it cannot be accidentally dislodged, even when the roller abruptly contacts an obstruction such as a rut, rock or curb.

BACKGROUND OF THE INVENTION 
Recently it has been the practice in construction of hand luggage to mount 
a caster or roller thereon to assist the user in the transporting thereof. 
Heretofore hand luggage cases which incorporated a caster thereon had been 
constructed such that the caster assembly was formed as a permanent part 
of the luggage case. Usually in such construction the caster extended 
outwardly of the luggage case and oftentimes resulted in inconveniences in 
the carrying or in the storing thereof. Thus it has been found as a 
practical matter that casters are not always desirable in many instances 
of use of the luggage. 
Prior to the instant invention, some efforts have been made to provide 
detachable caster assemblies for hand luggage cases, and one such 
construction is illustrated in the patent to FEINBERG, U.S. Pat. No. 
4,026,570. The caster assembly as illustrated in U.S. Pat. No. 4,026,570, 
does provide for detachably connecting a mounting plate assembly to a 
corner of a luggage case, but the mounting plate assembly as illustrated 
in the aforesaid patent is secured to the exterior wall of the luggage 
case, and thus permanently protrudes outwardly therefrom. Since the 
mounting plate assembly as illustrated in U.S. Pat. No. 4,026,570 does 
extend externally of the luggage wall, it is clearly visible and tends to 
detract from the ornamental appearance of the luggage case. Further, the 
mounting plate assembly as illustrated in the aforesaid patent includes 
apertures for receiving mounting tabs of the wheel assembly, and when the 
wheel assembly is removed from the mounted position thereof, the apertures 
therein are exposed to enable debris to filter into the apertures for 
collection between the case wall and the mounting plate assembly. The 
prior known construction also includes additional openings in the mounting 
plate assembly for receiving a spring element, and the additional openings 
as formed in the mounting plate assembly also enable dirt, debris or water 
to infiltrate therethrough for collection interiorly of the mounting plate 
assembly. Since the mounting plate assembly as utilized in the prior known 
construction illustrated in U.S. Pat. No. 4,026,570, is mounted in place 
by externally visible rivets, the entire assembly including the rivets are 
formed as a permanent part of the luggage exterior and hence detracts from 
the ornamental appearance thereof. The construction as illustrated in the 
aforesaid patent is also objectionable since the mounting plate is subject 
to be dislodged from its mounted position when the roller or caster 
thereof accidentally strikes an abutment or rut. 
It is the purpose of the present invention to overcome the objectionable 
features of the detachable caster shown in U.S. Pat. No. 4,026,570 and to 
further provide a unique detachable roller assembly that can be 
conveniently mounted in place and disassembled therefrom as required. 
The above-referred to patent to FEINBERG, U.S. Pat. No. 4,026,570 
represents the best prior art known to applicants to which the subject 
invention pertains. 
SUMMARY OF THE INVENTION 
The present invention is directed to a luggage case that includes a pair of 
hinged shell sections, at least one of the shell sections including means 
for receiving a roller assembly thereon in detachable relation. Spaced 
openings are formed in the one section adjacent to a corner thereof, and a 
roller assembly is secured in the opening and projects outwardly of the 
exterior surface of the case section. The roller assembly includes a pair 
of pivotal roller brackets through which the roller axle extends, a roller 
being mounted for rotation on the axle. A mounting tab is secured to each 
of the roller brackets at an outer end thereof and resilient means are 
provided for normally urging the roller brackets on which said mounting 
tabs are mounted away from each other. The roller brackets are movable 
inwardly against the action of the resilient means for locating the tabs 
in the openings in the case section for releasably mounting the roller 
assembly on the luggage case section. The roller thus projects outwardly 
of the luggage case section for engagement with a surface to provide for 
the convenient travel of the luggage case thereon. The openings in the 
case section are also formed of different size which provides for easy 
insertion of the tabs therein but prevents accidental dislodging of the 
tabs therefrom should the roller abruptly contact an obstruction or rut. 
Accordingly it is an object of the present invention to provide a luggage 
case to which a roller assembly is conveniently attached or detached as 
required. 
Other objects, features and advantages of the invention shall become 
apparent as the description thereof proceeds when considered in connection 
with the accompanying illustrative drawings.

DESCRIPTION OF THE INVENTION 
Referring now to the drawings and particularly to FIGS. 1 and 2, one form 
of the luggage case as embodied in the present invention is illustrated 
and is generally indicated at 10. The luggage case 10 as shown includes a 
bottom shell or section 12 and a top shell or section 14, the sections 12 
and 14 being hingedly connected together by hinge assemblies 16 in the 
conventional manner. The sections 12 and 14 are formed of any suitable 
material but are preferably formed of a metal or plastic material. The 
sections which have a shell-like configuration also include a lock 18, 
handle or hand grip 20 and foot pads 22, all of which are conventional in 
construction and therefore do not form any part of the present invention. 
The purpose of the subject invention is to enable a user, who is indicated 
at 24 in FIG. 1, to tilt the luggage case 10 on end and roll the case over 
a surface without having to physically lift it. For this purpose, the 
bottom shell or section 12 which is formed with a bottom wall 28 and a 
side wall 30 has spaced openings 27 and 29 formed therein for receiving a 
roller assembly, which is best shown in FIGS. 4, 5 and 6 and is generally 
indicated at 26. The openings 27 and 29 as formed in the bottom section 12 
as will be described are disposed at right angles to each other in the 
bottom wall 28 and side wall 30, the walls 28 and 30 converging at a 
corner 32 of the section 12. Located interiorly of the bottom section 12 
and positioned adjacent to the corner 32 is a mounting plate 34, the 
construction of which includes angled end portions 36 and 38. The end 
portion 36 of the mounting plate is located in contact with the interior 
surface of the bottom wall 28, while the end portion 38 is located in 
contact with the interior surface of the side wall 30, both end portions 
36 and 38 being formed with openings 39 and 41, respectively, that are 
located in alignment with the openings 27 and 29 that are formed in the 
bottom and side walls, respectively. Secured in the openings 27, 29 and 
39, 41, respectively, are grommets 40 and 42, the flanges of the grommets 
overlying the outer surfaces of the bottom and side walls 28 and 30 and 
the end portions 36 and 38 of the mounting plate 34 to secure the mounting 
plate in place. As shown in FIGS. 4 and 5, the size of the opening in the 
grommet 40 is less than the size of the opening in the grommet 42, and as 
will be described, this enables the roller assembly 26 to be easily 
inserted in place; and since the smaller grommet is located on the forward 
side of the case during the travel thereof, accidental dislodgement of the 
roller assembly will also be prevented. As will be further described, a 
cover plate 44 also located interiorly of the bottom section 12 overlies 
the mounting plate 34 at the corner 32 for concealing the mounting plate 
therein. A space 45 is thus formed between the cover plate 44 and the 
corner 32 of the bottom section 12 and only the openings as defined by the 
grommets 40 and 42 are externally visible. 
Referring now to FIGS. 6, 7 and 8, the roller assembly 26 is illustrated in 
detail and as shown includes brackets generally indicated at 46 and 48. 
The bracket 46 is formed with triangularly shaped side walls 50 and a 
bottom wall 52 between which a trough or recess 54 is defined. The bracket 
48 is similarly formed and includes triangularly shaped side walls 56 and 
a bottom wall 58 between which a recess 60 is defined. The bottom walls 52 
and 58 of the brackets 46 and 48 are foreshortened adjacent to the base of 
the side walls thereof and define a central opening therebetween that 
receives a roller therein as will be described. Joined to the side walls 
50 and bottom wall 52 of the bracket 46 is a projection 62 that has an 
outwardly extending tab 64 formed thereon. Similarly, a projection 66 is 
joined to the bottom wall 58 of the bracket 84 and has an outwardly 
extending tab 68 joined thereto. 
Formed in the base portions of the side walls 50 and 56 of the brackets 46 
and 48, respectively, are axial openings through which an axle 70 extends. 
A roller 72 is mounted on the axle and projects upwardly through the 
suitably formed openings in the bottom walls 52 and 58 of the brackets 46 
and 48. Also formed as part of the roller assembly 26 is a spring 
generally indicated at 74, which as shown in FIGS. 7 and 8 includes a 
central bowed portion 76 and arms or end portions 78 and 80, the arms or 
end portions being joined to the bowed portion 76 in angular relation with 
respect thereto. As shown more clearly in FIGS. 6, 7 and 8, the arms 78 
and 80 of the spring 74 are received in the recesses 54 and 60 of the 
brackets 46 and 48, respectively, the bowed portion 76 overlying the 
roller 72. It is seen that the spring 74 urges the brackets 46 and 48 away 
from each other so as to locate the tabs 64 and 68 in their furthermost 
apart position as shown in FIG. 7. As will be described, when the roller 
assembly 26 is to be mounted in place on the bottom section 12 of the 
luggage case, the brackets 46 and 48 are moved inwardly toward each other 
as shown in FIG. 8 and against the action of the spring 74, the roller 
assembly then being tilted as shown in FIG. 5 and the tab 64 guided into 
the smaller grommet 40. Thereafter, the tab 68 is inserted into the larger 
grommet 42 and the brackets are released. The spring 74 then urges the 
brackets to their fully extended position for locking the roller assembly 
in place. 
As shown in FIG. 2, two of the roller assemblies 26 are provided for the 
luggage case, and similarly, the section 12 is formed with appropriately 
formed grommeted openings in spaced location on the bottom wall 28 at the 
corner 32 thereof. In the normal use of the luggage 10, the roller 
assemblies 26 are removed from the mounted position on the bottom section 
12 of the luggage case and may be either stored in the luggage case or 
carried by the user as desired. 
When the luggage case 10 is fully loaded and it is necessary to transport 
the case for some distance, the roller assemblies 26 are conveniently 
mounted in place as shown in FIGS. 4 and 5. In this connection, the user 
merely moves the brackets 46 and 48 of a roller assembly toward each other 
as shown in FIG. 8 and first locates the tab 64 within the smaller grommet 
40 and then inserts the tab 68 in the larger grommet 42, after which the 
brackets are released. The spring 74 then urges the brackets 46 and 48 
outwardly, the tabs 64 and 68 projecting below the grommets and into the 
space 45 as defined between the cover plate 44 and the grommets as 
illustrated in FIG. 4. In the mounted position of the roller assemblies, 
the interior cover plate 44 conceals the grommets 40, 42 and inserted 
mounting tabs 64, 68 and a cover cloth may also be secured interiorly of 
the luggage case sections in the conventional manner for concealing the 
interior cover plate 44. With the roller assemblies 26 mounted in place as 
shown in FIG. 2, the user 24 may then grasp a special carry handle 
indicated at 82 in FIG. 1 for elevating the luggage case to the up-ended 
and inclined position for transport over a surface on the rollers 72. 
Should either of the rollers 72 in the transport of the case over a surface 
accidentally strike an abutment, hole or rut, the location of the smaller 
grommet in the forward or leading side of the case will act to prevent 
dislodgement of the roller assembly from its mounted position, the tab 64 
of the roller assembly as located in the smaller grommet 40, being 
prevented from removal therefrom except after withdrawal of the tab 68 
from the larger grommet 42. 
It is also seen that the roller assemblies 26 are easily removed from the 
mounted position thereof by squeezing the brackets 46 and 48 inwardly so 
that the tabs 64 and 68 clear the grommets, whereupon the roller assembly 
brackets are lifted outwardly of the grommeted openings for removal 
therefrom. Thereafter, plugs indicated at 84 in FIG. 10 may be inserted 
into the grommets 40 and 42 for sealing the interior space 45 as defined 
between the corner of the bottom section 12 and the cover plate 44. 
Referring now to FIGS. 11-16, a modified form of the invention is 
illustrated; and as shown, a luggage case generally indicated at 86 is 
provided that includes a bottom section 88 and a top section 90, the top 
and bottom sections 88 and 90 being hingedly connected together in the 
conventional manner. A luggage handle 92 is secured to the bottom section 
92 and feet 94 are located on the top and bottom sections to provide for 
resting of the luggage case on a surface as is well known in the art. 
As shown in FIG. 12 the bottom section 88 and the top section 90 of the 
luggage case 86 are each formed with a recessed or cut-out portion 96 in a 
corner as formed on one side thereof. For purposes of the description 
herein, the cut-out section 96 as formed in the bottom section 88 will be 
described as receiving a roller assembly 26 therein, it being understood 
that a similar roller assembly 26 is mounted in the cut-out portion 96 of 
the top section 90. 
Referring now to FIGS. 13, 14 and 15, the recess 96 as formed in the corner 
of the bottom section 88 defines shoulder 98 and 100 that are disposed at 
right angles with respect to each other. Formed in the shoulder 100 are 
spaced openings that receive grommets 102 and 104 therein. An interior 
mounting plate 106 that abuts the interior surface of the shoulder 100 is 
also formed with the openings that are aligned with the openings as formed 
in the shoulder 100, the grommets 102 and 104 extending through the 
openings in the mounting plate for securement therein as illustrated in 
FIGS. 14 and 15. The flanges of the grommets 102 and 104 are turned over 
the surfaces of the shoulder 100 and mounting plate 106 to firmly locate 
the grommets in place and to provide openings for receiving the tabs of a 
roller assembly 26 as will be described. An interior cover plate 108 is 
also secured to the interior surface of the shoulder 100 and is formed in 
a semi-circular configuration as illustrated in FIG. 16, the cover plate 
108 having a construction that spaces it outwardly of the shoulder 100 to 
provide a space for receiving the shoulders of the grommets 102 and 104 
and the tabs 64 and 68 of a roller assembly 26 as will be described. 
The roller assemblies as utilized in the modified form of the invention are 
substantially the same as that described above in FIGS. 6, 7 and 8 and as 
noted are also indicated at 26. Thus, the roller assemblies 26 are mounted 
in place on the bottom and top sections 88 and 90, respectively, by 
inserting the tabs 64 and 68 of the mounting tabs 62 and 66 within the 
grommeted openings 102 and 104, the spring 74 urging the brackets 46 and 
48 to the outer positions thereof for positively locking the roller 
assemblies in place. As shown in FIG. 13, the roller assembly 26 is 
located in the locked position thereof by inserting one of the tabs within 
a grommet opening and then inserting the other tab in the other grommet 
opening while the brackets 46 and 48 are in a depressed position relative 
to each other. When the brackets 46 and 48 are released, the spring 74 
urges the brackets to the fully extended position for locking the roller 
assembly in the grommet openings in the recess 96. It is also seen that 
the use of the recessed corners 96 as formed in the top and bottom 
sections of the case substantially conceals the roller assemblies even 
after they have been mounted in place. 
In the modified form of the luggage case 86 a special handle 110 is also 
provided that is grasped by the user 24 when the roller assemblies 26 are 
mounted in place. When the roller assemblies 26 are removed from the 
mounted position, plugs, such as plugs 84 shown in FIG. 10, may also be 
inserted into the grommets 102 and 104 for sealing the interior space as 
formed between the shoulder 100 and the mounting place 108. 
While there is shown and described herein certain specific structure 
embodying the invention, it will be manifest to those skilled in the art 
that various modifications and rearrangements of the parts may be made 
without departing from the spirit and scope of the underlying inventive 
concept and that the same is not limited to the particular forms herein 
shown and described except insofar as indicated by the scope of the 
appended claims.