Grating structure for roadway storm drain inlets and the like

Claim 1

A traffic-bearing grating and adjustable locking structure to be removably secured in a rectangular stationary frame to cover a roadway opening or the like at traffic-bearing surface level, the frame having downwardly facing surface portions, comprising a generally rectangular grating panel including plural parallel longitudinal straight bearing bars including first and second outermost side bearing bars respectively adjacent and confronting first and second opposite side frame members of said stationary frame, an anchoring shoulder formation fixed on said first side bearing bar having a rigid outwardly extending leg spaced at a location slightly below the lower edge of the first side bearing bar and projecting therefrom to interfit beneath a downwardly facing surface portion of said first frame member to prevent upward withdrawal of the adjacent grating portion therefrom when so interfitted, and an adjustable locking device carried by said second side bearing bar including an axially adjustable threaded stud extending through the second side bearing bar having threaded nut means for varying the axial position of the threaded stud and an angle shaped head on said stud defining a vertical contact face to confront and contact a vertical inside surface of the second frame member and shift the first end of the grating panel toward and away from said first frame member upon axial movement of the stud by the nut means, and said angle shaped head further defining a lower foot formation projecting outwardly from said contact face to extend beneath a downwardly facing surface portion of the second frame member upon axial outward adjustment of the stud by the nut means for locking the grating panel in the stationary frame.