Patent ID: 8016300
Filing Date: 2011-09-13
Classification: B62B,B65G,F17C,Y10T

Abstract:
1. A mobile cart for carrying a plurality of fluid canisters, the cart being adjustable between a standing mode and a rolling mode and comprising: a platform configured to support the fluid canisters during operation of the cart; a base connected adjacent the platform including a right base system and a left base system on which the mobile cart stands and rolls during operation of the cart, each of said base systems including: wherein each cartridge may be selectively moved up with respect to the respective base body to a retracted position, wherein none of the wheels of the cartridge extend below the bottoms of the inner and outer walls, and may be held in that position by the first and second pins being positioned in the respective first and second pin openings of the respective outer wall, cartridge body, and inner wall; wherein each cartridge may be moved down with respect to the respective base body to an extended position, wherein all of the wheels of the cartridge extend below the bottoms of the inner and outer walls, and may be held in that position by the first and second pins being positioned in the respective first and second pin openings of the respective outer wall and inner wall; and wherein the mobile cart is in the rolling mode when the cartridge of each base system is in the extended position and the mobile cart is in the standing mode when the cartridge of each base system is in the retracted position.