Toilet seat system

A toilet seat system for locking a seat in a down position and for unlocking a seat when a user sits upon it and driving it up when a user stands up from it comprising, in combination:

• a universal public toilet with a toilet seat, the seat having an upper surface and a lower surface, the seat having a generally oval configuration with a front edge and a rear edge spaced by a maximum distance of about 18 inches with side edges between the front and rear edges spaced by a maximum distance of about 14 inches;
• two vertically oriented, laterally spaced bolts, each bolt having a lower end with threads attached to the toilet, each bolt having an upper end with an aperture, the apertures being horizontally oriented in axial alignment;
• a pivot block depending from the lower surface of the toilet seat adjacent to the rear edge with a horizontal bore extending through the pivot block;
• an axle having end sections received within the apertures of the bolts and a central section received within the bore of the pivot block, the spaced bolts and the pivot block and the axle forming a hinge assembly for pivoting the seat with respect to the toilet;
• a housing attached to the toilet between the pivot block and one bolt, a coil spring around the axle with a first end secured within the housing and a second end in contact with the toilet seat, the coil spring adapted to urge the toilet seat from a lowered position to a raised position, an oscillating gear secured to the seat for movement therewith about an axis or rotation coincident with the axis of the axle, a pinion gear mounted for rotation in the housing and with teeth in meshing contact with the oscillating gear, a guide roller mounted for rotation in the housing and with a periphery in rolling contact with the oscillating gear with the oscillating gear between the pinion gear and the guide roller to resist the force of the coil spring when the toilet seat is rising for limiting its speed;
• and
• a locking assembly including an upper finger extending downwardly from the lower surface of the toilet seat closer to the rear end than the front end, the finger having an intermediate shoulder and a lower ramp, a lower finger extending upwardly from within the housing, the lower finger having an intermediate shoulder and a lower ramp, the lower finger being movable between a forward locking orientation and a rearward unlocking orientation, the forward locking orientation featuring the intermediate shoulder of the upper finger in contact with the intermediate shoulder of the lower finger, the rearward unlocking orientation featuring the intermediate shoulder of the upper finger being spaced from the intermediate shoulder of the lower finger whereby the coil spring will drive the toilet seat upwardly, where after the toilet seat is adapted to be lowered so that the ramp of the upper finger contacts and shifts the ramp of the lower finger whereby the seat is locked in a down position, where after the fingers will be separated and unlocked when a user sits upon the seat.