Patent ID: 7798466

Claim:
A blowout preventer comprising a main body, a ram apparatus movable within the main body to engage a tubular, hydraulic circuit apparatus for providing fluid under pressure to operate the ram apparatus, a bonnet movably connected to the main body for providing access to the ram apparatus, the bonnet movable by fluid under pressure supplied by the hydraulic circuit apparatus, bonnet movement apparatus, the bonnet movement apparatus in fluid communication with the hydraulic circuit apparatus, the hydraulic circuit apparatus including valve apparatus, the valve apparatus selectively controlling flow of fluid under pressure to the bonnet movement apparatus to move the bonnet with respect to the body, and valve activation apparatus for manually activating the valve apparatus to open or close the bonnet further comprising the hydraulic circuit apparatus providing fluid for disengaging the ram apparatus from a tubular, a portion of said fluid for said disengaging useful for moving the bonnet, and the valve apparatus including a first valve and a second valve, the valve activation apparatus comprising a fulcrum member on the bonnet, a rocker plate mounted for rocking movement on the fulcrum member, the rocker plate movable in a first direction to contact the first valve to open the bonnet, the rocker plate movable in a second direction to contact the second valve to close the bonnet.