School bus safety gate

Claim 1

IN A SCHOOL BUS AND THE LIKE: A HORIZONTAL BUMPER AT THE FRONT OF SAID BUS, SAID BUMPER BEING MADE FROM A GENERALLY UNIFORM THICKNESS OF METAL INTO A GENERALLY CHANNEL SHAPED CONFIGURATION HAVING TOP AND BOTTOM REARWARDLY EXTENDING FLANGES CONNECTED TOGETHER BY A FRONT WEB, SAID WEB HAVING TOP AND BOTTOM GENERALLY VERTICAL SECTIONS ADJACENT THE TOP AND BOTTOM FLANGES RESPECTIVELY AND A REARWARDLY DEFORMED CENTER WEB SECTION HAVING A REAR GENERALLY VERTICAL CENTER PORTION AND TOP AND BOTTOM FORWARDLY DIVERGING SIDEWALL PORTION WHICH CONNECT TO SAID TOP AND BOTTOM VERTICAL SECTIONS OF SAID WEB RESPECTIVELY TO THEREBY FORM A HORIZONTAL DEPRESSION IN THE FRONT SURFACE OF SAID BUMPER HAVING A FLAT BOTTOM AND DIVERGING SIDES, A GATE STRUCTURE FITTING INTO SAID HORIZONTAL DEPRESSION AND ADAPTED TO BEAR AGAINST SAID CENTER PORTION, MEANS HINGING SAID GATE STRUCTURE TO ONE SIDE OF SAID BUMPER FOR HORIZONTAL SWINGING MOVEMENT TOWARD AND AWAY FROM SAID BUMPER, EXPANSIBLE AND RETRACTABLE MEANS POSITIONED HORIZONTALLY IN THE SPACE BEHIND ONE OF SAID TOP AND BOTTOM VERTICAL WEB SECTIONS AND BETWEEN THE ADJACENT FLANGE AND SAID REARWARDLY DEFORMED CENTER SECTION, SAID EXPANSIBLE AND RETRACTABLE MEANS EXTENDING BETWEEN SAID GATE AND SAID BUMPER FOR MOVING SAID GATE FROM A POSITION FITTING INTO SAID HORIZONTAL DEPRESSION TO A POSITION GENERALLY AT RIGHT ANGLES TO SAID BUMPER AND INCLUDING A LOST MOTION CONNECTION, A LATCH FOR HOLDING SAID GATE STRUCTURE IN A LATCHED POSITION AGAINST SAID CENTER WEB PORTION OF SAID REARWARDLY DEFORMED SECTION, A RETAINER WHICH MUST BE REMOVED FROM SAID LATCH TO PERMIT SAID GATE STRUCTURE TO SWING AWAY FROM SAID LATCHED POSITION, SAID LOST MOTION CONNECTION BEING IN A FIRST CONDITION WHEN SAID EXPANSIBLE AND RETRACTABLE MEANS MOVES SAID GATE STRUCTURE TOWARD ITS LATCHED POSITION AND BEING IN A SECOND CONDITION WHEN SAID EXPANSIBLE AND RETRACTABLE MEANS MOVES SAID GATE STRUCTURE AWAY FROM ITS LATCHED POSITION, MEANS USING THE MOVEMENT OF SAID EXPANSIBLE AND RETRACTABLE MEANS IN MOVING SAID LOST MOTION CONNECTION FROM SAID FIRST CONDITION TO SAID SECOND CONDITION FOR REMOVING SAID RETAINER FROM SAID LATCH, A WARNING ARM PIVOTED TO THE SIDE OF SAID GATE STRUCTURE WHICH FACES SAID BUMPER, SAID ARM BEING HORIZONTAL AND PARALLEL TO SAID GATE STRUCTURE WHEN SAID GATE STRUCTURE FITS INTO SAID HORIZONTAL DEPRESSION, MEANS FOR MOVING SAID ARM TO A VERTICAL POSITION WHEN SAID GATE STRUCTURE IS MOVED TO ITS OPEN POSITION, AND A GUARD STRUCTURE CARRIED BY SAID GATE STRUCTURE AND SEALING OFF SAID HORIZONTAL DEPRESSION WHEN SAID GATE STRUCTURE IS LATCHED INTO SAID HORIZONTAL DEPRESSION.