Anti-backlash nut for lead screw
Patent 6311576 Issued on November 6, 2001. Estimated Expiration Date: 
October 4, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 4, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3004445 3170337 3611818 Electrically adjustable vehicle accessory Anti-backlash nut Apparatus for converting rotary motion to linear motion Anti-backlash nut having a free floating insert for applying an axial force to a lead screw Spring bias wedge in reinforcing rail Patent #: 5937702 InventorAssigneeApplicationNo. 411875 filed on 10/04/1999US Classes:74/441, Screw and nut74/89.42BacklashExaminersPrimary: Bucci, David A.Assistant: Joyce, William C Attorney, Agent or FirmForeign Patent References
International ClassesF16H 025/24F16H 057/12 AbstractAn anti-backlash nut includes a body having an axially-extending bore and internal threads for engaging a lead screw inserted into the bore. The internal threads are divided circumferentially into three inner segments each movable in a radial direction. The anti-backlash nut also includes springs for independently biasing the inner segments radially inward to contact the lead screw. The anti-backlash nut provides wear compensation as well as anti-backlash to improve positioning repeatability when used with an open loop positioner. | |
