초록 ▼

A caster assembly is disclosed which includes a bearing block with sockets for interchangeably receiving means of attachment to a frame or other structure. A track member is mounted in the bearing block for rotation about an inclined axis extending downwardly at an angle from the vertical direction.

A caster assembly is disclosed which includes a bearing block with sockets for interchangeably receiving means of attachment to a frame or other structure. A track member is mounted in the bearing block for rotation about an inclined axis extending downwardly at an angle from the vertical direction. Means forming a variable pitch bearing interposed between the track member and bearing block are described, and its optimum configuration for converting multi-directional forces into radially directed forces distributed more or less evenly around the axis.

대표청구항 ▼

A caster assembly comprising the combination of a bearing block, a track member mounted for rotation on said bearing block about an inclined axis extending downwardly at an angle ‘a’in the range of 10°to 35°from a vertical direction, said track member including a cupped outer surface adapted for con

A caster assembly comprising the combination of a bearing block, a track member mounted for rotation on said bearing block about an inclined axis extending downwardly at an angle ‘a’in the range of 10°to 35°from a vertical direction, said track member including a cupped outer surface adapted for contacting the floor or other surface for movement thereon, means forming an annular cavity in said track member opening outwardly in the end opposite said cupped outer surface and disposed to lie in a plane perpendicular to said axis and concentrically therewith, means forming a corresponding circular cavity opening outwardly in one end of said bearing block, said two cavities being combined in a cooperating configuration to form two parts of an annular chamber, in which said circular cavity is a stationary element, and in which said annular cavity is a moveable element, said annular chamber containing a circular row of spherical balls in frictional contact with said elements.