B - Operations – Transporting – 62 – B
Patent
B - Operations, Transporting
62
B
280/92
B62B 5/00 (2006.01) A47B 31/00 (2006.01) A47B 57/26 (2006.01) F16B 7/02 (2006.01) F16B 7/04 (2006.01) F16B 7/10 (2006.01)
Patent
CA 1308760
MODULAR UTILITY CART INCLUDING IMPROVED STRUCTURES FOR SECURING INTERMEDIATE AND TOP SHELVES TO CORNER POSTS ABSTRACT OF THE DISCLOSURE A modular utility cart includes four corner posts, at least one intermediate shelf and a top shelf. The cart incorporates improved structures for securing the intermediate and top shelves to the posts. Specifically, each intermediate shelf is formed with four open collars each for embracing one post. Each collar has a cross-section substantially congruent to the cross-section of the associated post, and has an upper right tubular portion embracing the post, a lower tubular portion having a downwardly outwardly inclined inner surface, and a transition portion between the upper and lower portions. The top shelf, which is mountable in the region of the tops of the posts, is formed with four blind tubular collars, each having a downwardly outwardly inclined inner surface and an inwardly projecting retaining flange at the bottom edge of the surface. Four sleeves are provided for each intermediate shelf and for the top shelf and each includes upper and lower edges, a right tubular inner surface for closely embracing a post, and a downwardly outwardly inclined outward surface matable with the inner surface of either the open collar or the blind collar. Thus, downward movement of each intermediate shelf causes each open collar to move downwardly over an associated sleeve so that the outer surface of the sleeve mates with the inner surface of the open collar to compress the sleeve toward the associated post. Downward movement of the open collar is limited by abutment of its transition. portion with the top edge of the sleeve. Similarly, downward movement of the top shelf causes the retaining flange of the blind collar to override the outer surface of a sleeve until the outer surface of the sleeve and the inner surface of the blind collar mate with the flange underlining the bottom edge of the sleeve. In this way, the sleeve is inwardly compressed against the post and upward movement of the top shelf is resisted by engagement of the retaining flange on the bottom edge of that sleeve. 2504Z/
573237
Cohn Robert J.
Rosania Jeffrey William
Rosania W. Stanley
Sudimak Michael J.
Bereskin & Parr
Intermetro Industries Corporation
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