Anti-fouling caster

Claim 1

A CASTER COMPRISING: A FRAME HAVING A PAIR OF SIDE MEMBERS; A WHEEL HAVING A PORTION DISPOSED BETWEEN SAID SIDE MEMBERS; PROJECTIONS ON SAID FRAME SIDE MEMBERS AND AFFIXED THERETO AND FORMING A PAIR OF YOKES IN HORIZONTALLY SPACED RELATION, SAID YOKES OPENING GENERALLY DOWNWARDLY; AN AXLE MOUNTED TO SAID WHEEL AND HAVING SLOTTED PORTIONS RECEIVED BY SAID YOKES WHER EBY SAID YOKES PREVENT ROTATION OF SAID AXLE; SPACER MEANS MOUNTED ON SAID AXLE AND COAXIAL THEREWITH AND COMPLETELY ENCIRCLING SAID AXLE AND HAVING FACES ABUTTINGLY ENGAGEABLE WITH SAID PROJECTIONS, SAID WHEEL BEING ROTATABLE INDEPENDENT OF SAID SPACER MEANS, AND EACH OF SAID PROJECTIONS HAVING FRONT AND REAR PORTIONS AND HAVING PROTRUDING BOSSES THEREON WITH THE BOSSES THEREBY BEING DISPOSED TO PHYSICALLY INTERFERE WITH SAID SPACER MEANS AND RESIST REMOVAL OF SAID SPACER MEANS AND RESIST REMOVAL OF SIAD SPACER MEANS AND THEREBY RETAIN SAID AXLE IN SAID YOKE.