Patent ID: 6764261
Filing Date: 2004-07-20
Classification: E02D

Abstract:
A locking device for a cover overlying a space defined in part by a sidewall, said cover recessed within a perimeter frame extending around said opening and having a through opening adjacent a side thereof, said device comprising:an upper elongated member having a flange at a top end configured to suspend said upper member on said cover extending into said opening; a recess extending into said flange and terminated by a bottom wall; and a hole extending into said bottom wall and through a lower end of said upper member; a threaded bolt slidably received into said hole and protruding out said bottom end of said upper member, said bolt having a head received into said recess; a lower elongate member having spaced walls defining a space having said lower end of said upper member fit therein, said threaded bolt threadably received into a threaded hole in a trunnion rotatably supported in said lower member and extending across said space; at least one spring connected at one end to said upper member and at another end to said lower member, said at least one spring located to urge said members together in an end to end direction and also to urge relative rotation of said members about said trunnion to articulate the same; a detent mechanism comprising a first detent feature on the bottom end of said upper member and a second detent feature on said lower member engaging said first detent feature with said members in end to end abutment so as to prevent relative rotation about said trunnion; said bolt able to push said lower member away from said upper member against said spring force to cause disengagement of said detent features allowing said members to articulate by relative rotation other about said trunnion.