Bumper means for scraper-loaders and the like

Claim 1

SHOCK ABSORBING APPARATUS FOR A SCRAPER LOADER OR THE LIKE COMPRISING, IN COMBINATION, A MOUNTING AND HEAD END PLATE MOUNTABLE ON A SCRAPER LOADER OR THE LIKE, MOUNTING MEANS PROJECTING FROM ONE FACE OF SAID PLATE, A BORE THROUGH SAID PLATE OPENING IN ONE END AT SAID MOUNTING MEANS OF SAID PLATE, A HYDRAULIC CYLINDER MOUNTED ON SAID PLATE, CONDUIT MEANS CONNECTING ONE END OF SAID HYDRAULIC CYLINDER TO SAID BORE IN SAID PLATE, PISTON MEANS POSITIONED WITHIN SAID CYLINDER, AN ELONGATED HOUSING MEMBER HAVING A HEAD END PORTION AND A ROD END PORTION, SAID HOUSING MEMBER ENGAGING SAID ONE FACE OF SAID PLATE AND RECEIVING IN SAID HEAD END PORTION SAID MOUNTING MEANS ON SAID PLATE, A COLLAR HAVING AN ABUTMENT ON ONE END FACE THEREOF, SAID ROD END PORTION OF SAID HOUSING MEMBER RECEIVING SAID ABUTMENT ON SAID COLLAR, MOUNTING MEANS CONNECTED TO SAID PLATE AND SAID COLLAR TO SECURE SAID PLATE, SAID COLLAR AND SAID HOUSING MEMBER IN ASSEMBLED RELATION, AN ELONGATED PISTON ROD SLIDABLY RECEIVED BY SAID COLLAR AND PROJECTING INTO SAID HOUSING MEMBER, A PISTON POSITIONED WITHIN SAID HOUSING MEMBER AND SECURED TO SAID PISTON ROD, SEALING MEANS POSITIONED ON SAID LAST-NAMED PISTON AND SEALINGLY ENGAGING SAID INNER SURFACE OF SAID HOUSING MEMBER, AND A BUMPER SECURED TO THE OTHER END OF SAID PISTON ROD, HYDRAULIC FLUID POSITIONED IN AND SUBSTANTIALLY FILLING SAID HOUSING MEMBER BETWEEN SAID LAST-NAMED PISTON AND SAID PLATE, SAID BORE IN SAID PLATE, SAID CONDUIT AND SAID HYDRAULIC CYLINDER BETWEEN SAID PISTON THEREIN AND SAID ONE END PORTION THEREOF, AND SAID HYDRAULIC CYLINDER BETWEEN SAID PISTON THEREIN AND THE OTHER END THEREOF BEING FILLED WITH A GAS SO THAT WHEN SAID BUMPER IS ENGAGED SAID LASTNAMED PISTON IS RETRACTED IN SAID HOUSING MEMBER CAUSING DISPLACEMENT OF SAID HYDRAULIC FLUID FROM SAID HOUSING MEMBER THROUGH SAID BORE, SAID CONDUIT AND INTO SAID HYDRAULIC CYLINDER TO COMPRESS SAID GAS IN SAID CYLINDER AND THEREBY ABSORB SHOCK.