Universal joint with dual rollers

A universal joint comprising:

• a first body for connecting to a first rotating member;
• a second body for connecting to a second rotating member;
• a link;
• a first coupling mechanism for connecting said first body to said link and including a first pair of rollers with conical surfaces and rotatably attached to one of said first body and said link, and a first aperture in the other one of said first body and said link, wherein the first pair of rollers is received in the first aperture;
• and
• a second coupling mechanism for connecting said second body to said link and including a second pair of rollers with conical surfaces and rotatably attached to one of said second body and said link, and a second aperture in the other one of said second body and said link, wherein said second pair of rollers is received in the second aperture.

A universal joint comprising:

• a link having a first aperture therethrough;
• a first body for connecting to a first rotating member;
• a first pin attached to said first body;
• and
• a first pair of rollers rotationally mounted adjacent each other on said first pin, with said first pin and said first pair of rollers extending into the first aperture of said link, wherein each roller of said first pair of rollers has a conical surface which is engaged by said link wherein the first pair of rollers rotate simultaneously in opposite directions as said first body rotates.

A universal joint comprising:

• a link having a first aperture and a second aperture therethrough;
• a first body for connecting to a first rotating member;
• a first pin attached to said first body;
• and
• a first pair of rollers rotationally mounted adjacent each other on said first pin, with said first pin and said first pair of rollers extending into the first aperture of said link;
• a second body for connecting to a second rotating member;
• a second pin attached to said second body;
• and
• a second pair of rollers rotationally mounted adjacent each other on said second pin, with said second pin and said second pair of rollers extending into the second aperture of said link, wherein each roller of said first pair of rollers and said second pair of rollers has a conical surface which is engaged by said link, wherein, as said first body rotates, said rollers in said first pair of rollers rotate simultaneously in opposite directions and said rollers in said second pair of rollers rotate simultaneously in opposite directions.

A universal joint comprising:

• a link having a first aperture therethrough;
• a first body for connecting to a first rotating member;
• a first pin attached to said first body;
• and
• a first pair of rollers rotationally mounted adjacent each other on said first pin, with said first pin and said first pair of rollers extending into the first aperture of said link, wherein the first aperture tapers so that a cross sectional area of the first aperture decreases with increasing distance from a surface of said link.

A universal joint comprising:

• a link having a first aperture and a second aperture therethrough;
• a first body for connecting to a first rotating member;
• a first pin attached to said first body;
• and
• a first pair of rollers rotationally mounted adjacent each other on said first pin, with said first pin and said first pair of rollers extending into the first aperture of said link, wherein the first aperture tapers so that a cross sectional area of the first aperture decreases with increasing distance from a surface of said link, and the second aperture tapers so that a cross sectional area of the second aperture decreases with increasing distance from a surface of said link.