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The invention relates to rollable personal container transport devices such as luggage, tool boxes and the like. The art has recognized that travelers who use rollable luggage often need to carry additional items of luggage or personal effects and the need for rollable luggage designs that can accommodate such additional items while pulling the luggage thorough airports to surface transport and to rooms at hotels and the like. Workers bringing wheelable tool boxes to worksites often have additional items that must be transported and that can require multiple trips between a vehicle and the worksite.
Prior patent documents describing the problem and offering other solutions include:
U.S. Pat. No. 5,291,976 “Wheeled suitcase of luggage support with collapsible towing handle” uses a strap to attach a second suitcase.
U.S. Pat. No. 8,955,656 “Luggage table” uses a table mountable on a suitcase to hold personal items while in airport.
US 20110247910 “Luggage with Deployable Undercarriage” describes, according to the Abstract,
Quoting further from the background of US 20110247910:
Travelers are always looking for efficient and easy ways for carrying their baggage. Many times people in airports are trying to pull at least two suitcases at a time, as well as a small carry-on bag, briefcase, laptop, purse, cameras, etc. In addition, parents have to manage their children who also may have their own luggage and toys.
Wheeled suitcases with telescopic handles are now the norm. This allows the traveler to tilt the suitcase onto its rear wheels and pull the suitcase by the handle so that the traveler does not have to lift the suitcase. This may be acceptable for the light traveler; however, for travelers going on extended vacations with multiple baggages, the simple suitcase with wheels and a telescopic handle just is not enough.
Travelers may try to stack additional baggage on top of the rolling suitcase. Some suitcases even come with support members that extend from the front to increase the surface area for stacking. However, the support members are weak and are limited in the amount of baggage that can be placed on them. In addition, the stacked baggage is often times unsteady, and when the traveler comes to a stop and needs to rest, resetting the baggage into the vertical position causes all the stacked baggage to fall off.
In some instances, the traveler may rent a cart at an airport, if available. However, when the traveler is finished using the cart, the cart must be returned. Therefore, the rental of a cart can be costly, and is definitely inconvenient.
“[0007] For the foregoing reasons there is a need for a luggage that allows the traveler to carry multiple baggage easily and effectively.”
While the problem to which the invention is directed has been recognized, the solutions provided in the prior art are not fully satisfactory.
Retractable platforms that allow a person to ride a piece of luggage are disclosed in U.S. Pat. No. 3,314,494 Collapsible luggage scooter; U.S. Pat. No. 8,282,113 Rideable luggage; U.S. Pat. No. 9,033,350 (EP 2540604) Luggage scooter device. These platforms likewise are not satisfactory if they were to be repurposed as platforms for carrying additional luggage.
The inventor discloses herein rollable personal container transport devices such as rollable luggage with a platform that is rotatably movable through an angle (or instance of about 270°), from a closed position adjacent a back side of the device to an open position extending generally along the ground beyond the front of the luggage to provide a surface for carrying additional items of luggage or personal effects. The platform includes a pair of caster wheels at the upper side in the closed position that project downward in the open position to contact the ground. The platform is coaxially mounted with a pair of rear wheels of the transport device. The platform includes a pair of caster wheels at the upper side in the closed position that project downward in the open position to contact the ground.
In preferred embodiments, a back-parallel plane B running through the rear wheel axis and parallel to the back side is coplanar with a plumb plane P running through rear wheel axis and at right angle to the ground or floor plane F and both planes B and P are coplanar with a platform-parallel plane D running through the rear wheel axis and parallel to the platform outer edge when the platform is the closed position, but when the platform is rotated to the open position the back-parallel plane B deviates several degrees off parallel to said plumb plane P in the direction of rotation of the platform. This deviation allows the device to more easily be pushed and pulled when the platform is loaded.
In some embodiments, the back of the platform suitably has a deviation angle of from about 5°-10° from the plumb plane running through the real wheel axials. The spacing distance E between the platform-parallel plane D of the and the outer tangent of the caster wheels sets an angle of inclination C from level ground when the platform is in the open position. The angle of inclination C, suitably equal to the angle G of deviation, helps keep the additional articles from sliding of the platform even if unsecured.
All published documents cited herein are incorporated herein by reference in their entirety.
In the several figures the same numerals are used to show the same parts in multiple views. The embodiment illustrated in the figures is a preferred embodiment of rollable luggage case designated by the numeral 10. The case 10 includes a generally box-like container for the possessions being transported having front side 12, backside 14, top side 16, bottom side 18, and two depth-sides 20, only one of which is shown. Two wheels 22, 23 at the bottom rear make the luggage case rollable. The luggage case shown is suitably dimensioned for checked luggage (62″ total L+W+H), although it may also be dimensioned for carry-on luggage, or over-sized luggage without departing from the invention. In alternate embodiments configured for tool chests and the like likewise, the dimensions are adapted to the ordinary practical constraints imposed on the particular use of the device.
The bottom rear wheels 22, 23 are mounted on a common axis with a platform 30. The platform 30 is rotatable about said axis from a closed position adjacent the backside 14 of the luggage case about a rotation angle A of 270° to an open position adjacent the bottom side 18 of the luggage case. The 270° rotation angle is set assuming right angles between the bottom and back sides of the container. These can of be modified to some extent, so the 270° rotation angle should be taken as approximate. The platform 30 has an outer surface 31 onto which additional articles such as second items of luggage, personal items such as purses and computers, and the like, may be loaded when the platform 30 is in open position. The platform 30 also has an inner surface 31 adjacent the back side 14 when the platform is in closed position, and an upper edge 33.
To stabilize the luggage when standing with platform 30 in the closed position, the front bottom is provided with a pair of lugs 24, 25. The lugs can be permanently mounted or molded in place, or replaced by caster wheels or rollers, not shown. In the embodiment depicted, the lugs 24, 25 can be pivoted against bottom side to increase clearance under the bottom when the platform 30 is in its open position. Higher bottom clearance facilitates moving on uneven surfaces and crossings of transitions between different flooring surfaces such as occur between carpeting and marble flooring.
The platform 30 includes a top edge side edges and a pair of caster wheels 40, 41 mounted near the top edge along the side. The platform can be generally T-shaped to minimize weight and accommodate pivoting around its axis of rotation as described later. The platform 30 includes caster wheels 40, 41 are mounted to the cross of the T. In the embodiment shown the caster wheels 40, 41 project inward from the platform alongside the depth sides of the case. In alternate embodiments, not shown, the case may be provided with indents in the back side into which the caster wheels project in the closed position. When the platform is in the open position the caster wheels project downward from the platform and are free to swivel about respective axes as shown in
In some embodiments, the caster wheels 40, 41 are parallel to the side 20 when the platform is in the open position, in a manner similar to that described in U.S. Pat. No. 4,054,965 incorporated herein by reference, or in the similar manner shown in
The case 30 includes an integral push-pull handle 50 by means of which the case can be pulled when the case is in the closed position or both pushed and pulled when the platform is in the open position. The handle 50 can of course replaced with a retractable handle as is common with many rollable cases.
To hold the platform in its closed and open positions the platform is provided with a. latch mechanism which engages locking structures on the back and bottom of the case, respectively. In the embodiment shown, the latch mechanism has a spring loaded male portion 54 that engages female member 56 in the closed position and female member 58 when in the open position. The male member is attached to a latch handle 60 that is accessible from side 31 of the platform. The latch handle 60 when pulled in a direction toward top edge 33 causes the male member move upward sufficient to clear the female member and thereby allow rotation about the platform axis.
When the platform reaches the open position, the latch handle 60 is still accessible from the outer side 31 of the platform. To latch platform 30 in the open position the latch handle is again pulled in the direction of platform upper edge 33 to clear the bottom female member 58 and then released so that the spring-bias of the male member causes it to engage the bottom female member. In the embodiment shown, the latch handle 60 is accessible from both outer side 31 and inner side 32. This allows the latch to be engaged or released from the female member 58 as is found convenient by the user.
To rotate the platform between the open and closed positions, the case is suitably tilted to put one of the depth sides 20 on the floor. The latch can be released and the platform can be rotated freely from that position.
Referring to
The angle of rotation of the plane D is shown as angle A in
Referring to
In further embodiments, the platform 30 may have projectable segments connected by drawer slide mechanism analogous to the bottom platform slides utilized in US 2011/0247910.
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Number | Date | Country |
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2540604 | Jan 2013 | EP |
Number | Date | Country | |
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20180360183 A1 | Dec 2018 | US |