Back to results
US 7,201,533 B2Granted
Sewer grate locking mechanism and method of installing same
AssigneeGrate Sewer Lock Co., LLC
InventorRichard DeGreef
Life of this patent
Estimating the term…
Abstract
A conventional sewer grate has a locking mechanism for preventing removal of the grate from its mounting frame by unauthorized persons. The locking mechanism includes a grate hold-down device, a threaded nut attached to the mounting frame below the hold-down device, and a bolt extending downwardly through the hold-down device into threaded engagement with the nut. The head of the bolt is specially constructed so that a specially-formed wrench is required to unscrew the bolt from the nut.
Claims9
A locking mechanism for removably securing a sewer grate having a plurality of spaced grate bars to an associated frame comprising:
- a mounting member having a first portion and a second portion, said first portion connected to said frame;
- a grate hold down member, said hold down member completely encircling at least one of said grate bars of said sewer grate, said hold down member once associated with said grate being permanently coupled thereto;
- and
- at least one fastener extending through a portion of said hold down member and into engagement with said second portion of said mounting member, whereby said grate is connected to said frame via connection of said hold down member to said mounting member.
1 more element
Dependencies are inferred from the claim text.