Anti-backlash nut having a free floating insert for applying an axial force to a lead screw
Patent 5303606 Issued on April 19, 1994. Estimated Expiration Date: 
April 15, 2013. 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.
April 15, 2013. 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 Re32433 2586044 2615348 3760686 3831460 Anti-backlash nut having longitudinal flexural members with ramps thereon and means to apply an axial pre-load force to said ramps Carrier moving mechanism Locking nut Backlash-free drive for the infeed mechanism of a microtome Patent #: 5117706 InventorApplicationNo. 048354 filed on 04/15/1993US Classes:74/441, Screw and nut411/304, Disposed within an interruption of a threaded surface411/433Including movable threaded segmentsExaminersPrimary: Herrmann, Allan D.Attorney, Agent or FirmForeign Patent References
International ClassesF16H 057/12F16H 025/24 AbstractAn anti-backlash nut having a central bore therethrough, wherein a portion of the central bore is threaded to cooperatively engage a lead screw. A free floating insert is disposed in a radial aperture in the anti-backlash nut, such that a threaded inner surface of the insert contacts the lead screw. The threaded insert may be radially biased or offset such that the threads of the nut body and the threads of the insert engage opposing faces of the lead screw threads to provide accurate and reliable motion of the anti-backlash nut upon relative rotation of the lead screw.Other References
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