Patent ID: 7188550
Filing Date: 2007-03-13
Classification: B25B

Abstract:
1. An open end adjustable spanner comprising: a spanner body having a handle and a head provided at one end of said handle, said head having an accommodation trough having an upper deck and a lower deck, an outer edge of said head being formed with an arc raised channel, said lower deck being positioned between said upper deck and said arc raised channel; an open-end ratchet fitted in said head and having two opening sections at different widths, a bottom of said open-end ratchet having a recessed slot adapted to engage with said arc raised channel; a first latch arranged in said lower deck and having a serrated portion; a second latch arranged in said lower deck and having a serrated portion; a return spring forcing said serrated portion of said first latch and second said serrated portion of said second latch to engage with said ratchet; a spacer having a contour adapted to said accommodation trough to cover and keep said first and second latches in said upper deck; a control member disposed on said spacer, said control member having a bottom formed with a recess in which are fitted a serrated bit and a first hairpin spring forcing said serrated bit to engage with said ratchet; a second hairpin spring forcing said control member to one side of said accommodation trough; and an upper lid fastened on a top of said head.