Combination roller tooth set having roller teeth and concave surfaces disposed to engage each other

摘要

The disclosure is directed to a combination roller set comprising an inside body member having a first longitudinal body axis and an outside body member surrounding said inside body member and having a second longitudinal body axis substantially parallel to said first body axis. The first body axis and said second body axis are displaced from each other. The body axis of said body members is disposed to provide an orbital movement about the body axis of the other said body members. The inside and outside body members are respectively provided with a plurality of roller teeth disposed to mesh with each other and define a mesh relationship. One or both of the body members may be provided with concave surfaces. At least one of said concave surfaces and at least a roller tooth in the other of said body members is disposed to engage each other in said mesh relationship and provide a contact engagement therebetween.