Patent ID: 7975873

Claim:
A bracket type biogas storage cover for a biogas digester, comprising: a cover having an air vent provided at a top end of said cover, and at least two brackets spacedly provided at a lower opening edge of said cover for coupling with an opening of said biogas digester, wherein said brackets are spacedly provided at said opening edge of said cover, wherein each of said brackets comprises a supporting frame having a triangular shape, and a locking sleeve provided at the vertex of said supporting frame for a pin locker passing through said locking sleeve, wherein said supporting frame has a curved base, wherein said locking sleeve is pivotally coupled at the vertex of said supporting frame, wherein two hypotenuse edge frames of said supporting frame are pivotally coupled with said curved base thereof, wherein said locking sleeve has a horseshoe structure and has two fringes extended from an opening of said locking sleeve, wherein a screw hole is provided at each of said fringes for pivotally connecting to said supporting frame, wherein each of said hypotenuse edge frames has a S-shaped structure and has two screw holes provided at two ends of said hypotenuse edge frame, wherein two connectors are spacedly provided at said curved base, wherein each of said connectors also has a screw hole formed thereon, wherein each of said hypotenuse edge frames is pivotally coupled between said locking sleeve and said curved base by coupling said two ends of said hypotenuse edge frame with said fringe and said respective connector to align said screw holes with each other for screws connecting thereto respectively; and a reinforce ring mounted at said opening edge of said cover, wherein said brackets are mounted at said reinforcing ring, wherein a curvature of said curved base matches with a curvature of a reinforcing ring mounted at said opening edge of said cover.