Browse Prior Art Database

Linear Actuator

IP.com Disclosure Number: IPCOM000073668D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Leary, TG: AUTHOR

Abstract

This linear actuator provides a simple, low cost and reliable means for positioning or moving a load in a linear fashion. Sprockets 1 and 2 support and drive a link chain 3. Sprocket 1 is the drive sprocket and sprocket 2 is an idler. One pin in the link chain 3 has been elongated and a roller 4 is attached to the upper end of the elongated pin. In the bottom of the load member 5 is a circular slot 6. The inside diameter of the slot 6 is the same as the diameter of the chain path around sprockets 1 and 2. The outside diameter of the slot 6 is large enough to admit and permit free rotation of the roller 4 on the elongated link chain pin. Two guide rails 7 and 8 are employed to support and guide the load 5 in its linear path.

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Linear Actuator

This linear actuator provides a simple, low cost and reliable means for positioning or moving a load in a linear fashion. Sprockets 1 and 2 support and drive a link chain 3. Sprocket 1 is the drive sprocket and sprocket 2 is an idler. One pin in the link chain 3 has been elongated and a roller 4 is attached to the upper end of the elongated pin. In the bottom of the load member 5 is a circular slot 6. The inside diameter of the slot 6 is the same as the diameter of the chain path around sprockets 1 and 2. The outside diameter of the slot 6 is large enough to admit and permit free rotation of the roller 4 on the elongated link chain pin. Two guide rails 7 and 8 are employed to support and guide the load 5 in its linear path.

When drive sprocket i is powered, the roller 4 imparts a force on the circular slot 6. This force is applied to the 360 degrees or 180 degrees point of slot 6 during full speed rightward or leftward motion. When the roller 4 arrives at a sprocket 1 or 2, its force point in the circular slot 6 changes and causes a deceleration of the lateral motion as the force point advances from 360 degrees toward 90 degrees or from 180 degrees toward 270 degrees. When a force point is either 90 degrees or 270 degrees, all lateral motion is stopped. When the force point advances from 90 degrees toward 180 degrees or from 270 degrees toward 360 degrees, direction of lateral motion is reversed or accelerated. Full speed motion of load 5 occurs w...