Caster

Abstract

A moveable body includes at least one caster. The caster has a yoke, a wheel supported on the yoke, and an interface member for attaching the caster to the moveable body. Additionally, the caster is configured so that a noise level of the moveable body as the moveable body travels over a surface is approximately 85 decibels or less.

1 .- 6 . (canceled)  
   
   
       7 . A moveable body, comprising: 
 at least one caster having: 
 a yoke;  
 a wheel supported on the yoke; and  
 an interface member for attaching the caster to the moveable body,  
   wherein the caster is configured so that a noise level of the moveable body as the moveable body travels over a surface is approximately 85 decibels or less.    
   
   
       8 . A caster, comprising: 
 a yoke including a support member and first and second legs extending from an underside of the support member;    a wheel rotatably supported between the first and second legs of the yoke by an axle; and    an interface member for attaching the yoke to a moveable body, the interface member including a first portion provided on the support member of the yoke and a second portion facing the first portion and being configured such that the yoke can swivel about a vertical axis relative to the second portion;    wherein a total vertical clearance between the first and second portions of the interface member is approximately 0.02 inches or less.    
   
   
       9 . The caster of  claim 8 , wherein a combined total clearance between an outermost side portion of the wheel adjacent the first leg and the first leg and an outermost side portion of the wheel adjacent the second leg and the second leg is approximately 0.032 inches or less.  
   
   
       10 . The caster of  claim 9 , wherein the outermost side portions of the wheel comprise end portions of a wheel hub.  
   
   
       11 . The caster of  claim 8 , wherein the interface member includes a ball bearing and a raceway, and wherein a total side clearance between the ball bearing and the raceway is approximately 0.050 inches or less.  
   
   
       12 . The caster of  claim 8 , wherein a clearance between an inner diameter of the wheel and an outer diameter of the axle is approximately 0.008 inches or less.  
   
   
       13 . The caster of  claim 12 , wherein the inner diameter of the wheel is an inner diameter of a wheel hub.