Adjustable bracket assembly for supporting a shelf

Claim 1

A bracket assembly supporting a shelf, said assembly comprising a pair of main bracket members, each of said main bracket members comprising a pair of rigid elongated, substantially flat planar members, said flat planar members each having a first hook upstanding proximate one of its ends, said first hook receiving a shelf first portion therein, a slide member mounted on each said bracket member, each said slide member comprising a rigid, elongated flat member having a planar portion disposed adjacent and bearing against a flat surface of each said main bracket member, each said slide member having a second hook upstanding therefrom generally opposed to each said first hook, each said second hook receiving a shelf second portion therein, each said slide member being slidably moveably flat against each said main bracket member to selectively determine spacing between said first and second hooks, each said main bracket member having an elongated slot therein, each said slot having an enlarged portion therein, a first pin fixed at one end to each said slide member, a shank portion of said first pin extending through said slot in each said bracket member, a head at the free end of each said shank portion, each said head having a diameter larger than the width of said slot and the width of said slot enlarged portion retaining each said slide member slidably on each said flat main bracket member, and a second pin mounted in each assembly, each said second pin comprising a first enlarged flat head disposed on a side of said bracket member removed from said slide member, an enlarged shank portion extending normally from each said first enlarged flat head, each said enlarged shank portion having a diameter sightly smaller than the width of said slot enlarged portion and greater than the width of said elongated slot and extending transversely normal and through each said main bracket and slide, a smaller shank portion extending from each said enlaged shank portion and of lesser diameter than said enlarged shank portion and of a diameter slightly less than the width of said elongated slot in each said main bracket member, each said smaller shank portion extending at a right angle through said slot, and a second enlarged head fixed to the end of said second pin remote from said first enlarged head, a spring mounted on said smaller shank portion between said second enlarged head and said flat slide member, whereby said enlarged shank portion enters sais slot enlarged portion and is urged by said spring to remain in said slot enlarged portion to lock said flat slide member in a flat fixed position contiguous on said main flat bracket members, and said enlarged shank portions having thereon shoulders which are urged by said springs into forceful engagement with the margins of said slots to secure each said flat slide member on each said flat main bracket member in contiguous flat sliding contact at locations in which said second pin enlarged shank portion is disposed along each said slot not in aligment with each said slot enlarged portion, said second pin thereby comprising a lock menas interconnecting each said flat bracket member and each said flat slide member for securing each said flat slide member in a selected fixed position on each said flat planar member so that each said first and second hooks on each said flat bracket and each flat slide member retains said shelf in selective position.