| US 7,552,661 B2 | ||
| Zero backlash positioning device | ||
| Carl C. Diana, Round Lake, Ill. (US); John A. Bostic, Plainfield, Ill. (US); Daniel A. Cloud, Glenview, Ill. (US); and Rodney S. Harris, Oak Park, Ill. (US) | ||
| Assigned to Quickset International, Inc., Northbrook, Ill. (US) | ||
| Filed on May 02, 2006, as Appl. No. 11/415,954. | ||
| Application 11/415954 is a continuation of application No. 10/437634, filed on May 14, 2003, granted, now 7,036,777. | ||
| Prior Publication US 2006/0278776 A1, Dec. 14, 2006 | ||
| Int. Cl. F16H 55/18 (2006.01) | ||
| U.S. Cl. 74—440 [74/425; 74/409] | 7 Claims |
| 1. A method for eliminating backlash in a pan and tilt device having a table, the method comprising:
associating a first worm gear and a second worm gear with a drive gear;
connecting a primary motor to the first worm gear and a slave motor to the second worm gear;
moving the drive gear in a desired direction of motion with the primary motor and the slave motor to pan or tilt the table
of the pan and tilt device to a desired position;
stopping the drive gear in the desired position; and
moving the slave motor in a reverse motion relative to the desired direction of motion to lock the pan and tilt device.
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