Coach seat locking mechanism

Claim 1

A coach seat construction of the type including a seat lower frame affixed to the floor of the coach, a seat upper frame rotatively secured to the seat lower frame, the upper frame having a first forward end and a second, rearward end, a seat rotation mechanism positioned intermediate the upper and lower frames, the seat rotation mechanism being spaced from the said first and second ends and being centrally located relative to the frames comprising a body secured to the seat lower frame, the body being positioned in transversely spaced relationship from the seat rotation mechanism and below the first end of the seat upper frame, the body being provided with a vertical bore; pedal arm means pivotally attached to the body to selectively lock the forward end of the seat lower frame to either the first end or the second end of the seat upper frame, the pedal arm means comprising a pedal arm, a pivot pivotally connecting the pedal arm to the body, and a pedal cam, the pedal arm being movable between a first, locked position and a second, unlocked position; locking rod means vertically reciprocable within the said vertical bore between a first, upper, locked position and a second, lower, unlocked position, the locking rod means comprising a locking rod and a lever connected to and extending outwardly from the locking rod, the locking rod extending upwardly and engaging a portion of the seat upper frame when the locking rod means is reciprocated to the first position, the locking rod preventing rotation of the seat upper frame relative to the seat lower frame when in the first position, spring means biasing between a portion of the body and the lever to continuously bias the locking rod to the first, locked position; operating finger means extending from the pedal arm to contact the lever, the operating finger means urging the locking rod from its first, upper, locked position to its second, lower locked position against the bias of the spring means when the pedal arm is moved from its first, locked position to its second, unlocked position; an extraction arm reciprocally movable relative to the body between a rearward position and a forward position, the extraction arm comprising a cam follower in contact with the pedal cam and an upper latch, the upper latch extending above the body and being of sufficient height to be contacted by a portion of the seat upper frame; and first and second spaced flanges depending respectively from the first end and the second end of the seat upper frame, the first and second flanges being positioned to serially overfit and engage the said upper latch; whereby depressing the pedal arm will cause the pedal cam to depress the locking rod simultaneously to move the extraction arm to its said forward position through forces imposed upon the said cam follower whereby the forward movement of the extraction arm will cause the engagement of the upper latch with a depending flange to simultaneously pull the seat upper frame forwardly.