Automatic retractable screen system for storm drain inlets

A retractable screen system for installation across a storm drain inlet, said system comprising:

• a frame comprising a first side and a second side opposite the first side, each of the first and second sides including a locking gear configured to rotate from a locked position to an unlocked position, each of the locking gears including a first recess and a second recess;
• a retractable screen rotatably coupled to the first and second frame sides, the screen being configured to rotate from a closed position to an open position, and the retractable screen comprising:
• a plurality of openings;
• and
• a plurality of projections extending therefrom, at least one of the screen projections being retained in the first recess of each of the locking gears when the screen is in the closed position and the locking gears are in the locked position;
• a trigger plate rotatably coupled to the screen, the trigger plate being configured to rotate from a first position to a second position, and the trigger plate having a plurality of projections extending therefrom, separate projections being retained in the second recess of each of the locking gears when the trigger plate is in the first position and the locking gears are in the locked position;
• wherein the trigger plate is configured so that when water flows against a portion of the trigger plate, the trigger plate rotates and the projections of the trigger plate move out of the second recess of each of the locking gears, allowing the locking gears to rotate from the locked position to the unlocked position to permit the projections of the screen to move out of the first recess of each of the locking gears and for the screen to rotate from the closed position to the open position.

A retractable screen system for installation across a storm drain inlet, said system comprising:

• a frame comprising a first side member and a second side member opposite the first side member;
• a retractable screen rotatably coupled to the first and second frame side members, the retractable screen being configured to rotate from a closed position to an open position, the retractable screen comprising a plurality of openings permitting water to flow therethrough;
• and
• a trigger plate coupled to the retractable screen, the trigger plate being configured to move from a first position to a second position, the retractable screen being prevented from rotating from the closed position to the open position when the trigger plate is in the first position;
• wherein the trigger plate is configured to move in a generally upward direction from the first position to the second position when water flows through the screen openings and against a portion of the trigger plate, the screen being permitted to rotate from the closed position to the open position when the trigger plate is in the second position.