Patent ID: 11859370
Assignee: CATERPILLAR INC.
Field: Civil engineering (Other fields)
Classification: CPC E  H | IPC E  H

Claim 7:
8. A head-end interface, comprising:
a first tier comprising a first planar surface extending substantially perpendicular to an axis extending substantially centrally through an inner space of the head-end interface from a first end of the head-end interface to a second end of the head-end interface, and a first substantially cylindrical outer surface extending from the first planar surface, the first substantially cylindrical outer surface defining:
a first diameter, and
a first height as measured from the first planar surface to a base of the head-end interface;

a second tier comprising a second planar surface extending substantially perpendicular to the axis, and a second substantially cylindrical outer surface extending from the second planar surface, the second substantially cylindrical outer surface defining:
a second diameter, and
a second height as measured from the second planar surface to the first planar surface; and

a third tier comprising a third planar surface extending substantially perpendicular to the axis, and a third substantially cylindrical outer surface extending from the third planar surface, the third substantially cylindrical outer surface defining:
a third diameter, and
a third height as measured from the third planar surface to the second planar surface.