Source: http://www.google.com/patents/US8016300?ie=ISO-8859-1
Timestamp: 2014-11-26 16:53:36
Document Index: 594743500

Matched Legal Cases: ['Application No. 60', 'art 10', 'art 10', 'art 10', 'art 10', 'art 10']

Patent US8016300 - Mobile cart having a retractable-wheel base system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA mobile cart for carrying a plurality of fluid canisters. The cart includes a platform configured to support the fluid canisters. The cart also includes a base having a base body and a plurality of wheels movably connected to the base body so that the wheels can be selectively moved with respect to...http://www.google.com/patents/US8016300?utm_source=gb-gplus-sharePatent US8016300 - Mobile cart having a retractable-wheel base systemAdvanced Patent SearchPublication numberUS8016300 B2Publication typeGrantApplication numberUS 12/243,744Publication dateSep 13, 2011Filing dateOct 1, 2008Priority dateOct 1, 2007Also published asUS20090097957Publication number12243744, 243744, US 8016300 B2, US 8016300B2, US-B2-8016300, US8016300 B2, US8016300B2InventorsPaul Cramer, Steven CoffmanOriginal AssigneeCramer Decker IndustriesExport CitationBiBTeX, EndNote, RefManPatent Citations (21), Non-Patent Citations (1), Classifications (12), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetMobile cart having a retractable-wheel base systemUS 8016300 B2Abstract A mobile cart for carrying a plurality of fluid canisters. The cart includes a platform configured to support the fluid canisters. The cart also includes a base having a base body and a plurality of wheels movably connected to the base body so that the wheels can be selectively moved with respect to the base body between an extended position and a retracted position. In the extended position, the plurality of wheels extends from the base body so the cart can roll, on the plurality of wheels, over the support surface supporting the cart. In the retracted position, the plurality of wheels is retracted relative to the base body so that the cart cannot roll, on the plurality of wheels, over the support surface.
CROSS-REFERENCE TO RELATED APPLICATION This application is a Non-Provisional application of U.S. Provisional Application No. 60/976,612, filed Oct. 1, 2007, which is incorporated herein by reference, together with any and all attachments and exhibits thereto. The full benefit and priority is claimed.
FIELD OF THE INVENTION Various embodiments of the present invention relate to carrying carts and, more specifically, to carts for carrying heavy items having a retractable-wheel system for selectively changing the cart between a stationary mode and a mobile mode.
BACKGROUND OF THE DISCLOSURE Heavy items and machinery often need to be moved in commercial and industrial environments. For example, packagers, distributors, and end users of canisters holding compressed fluids (e.g., oxygen, carbon dioxide, argon gas, propane, cryogenic fluids, and other liquids or gases) often need to move many canisters, which can weigh up to a total of 3,000 to 5,000 lbs when full. The common need to transport such heavy canisters led to development of conventional carting systems designed to carry multiple canisters, such as six or twelve canisters. These conventional carts include a heavy-duty platform on which the canisters are placed and some form of securing elements, such as straps wrapped around the canisters or an internal frame having internal welds, for holding the canisters together.
BRIEF SUMMARY OF THE DISCLOSURE The present invention includes embodiments of a mobile cart for carrying a plurality of fluid canisters. The cart includes a platform configured to support the fluid canisters. The cart also includes a base having a base body and a plurality of wheels movably connected to the base body so that the wheels can be selectively moved with respect to the base body between an extended position and a retracted position. In the extended position, the plurality of wheels extends from the base body so the cart can roll, on the plurality of wheels, over the support surface supporting the cart. In the retracted position, the plurality of wheels is retracted relative to the base body so that the cart cannot roll, on the plurality of wheels, over the support surface.
DETAILED DESCRIPTION OF THE VARIOUS EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying figures, in which some, but not all embodiments of the invention are shown. Indeed, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.
Operation of Various Embodiments of the Invention As described above, the cart 10 according to the present invention may be used for holding and transporting various types of items 12. For example, FIG. 1 shows the cart 10 holding a plurality of cylindrical fluid canisters 12. As also described above, the cart 10 is configured to be transitioned between a standing mode in which the multiple wheels 22 of the cart 10 are retracted above bottoms 32, 48 of walls 30, 44 of the base 18 of the cart 10 and a rolling mode in which at least some of the wheels 22 are extended at least partially below the bottoms 32, 48 of the walls 30, 44 of the base 18.
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