Spring bias wedge in reinforcing rail
Patent 5937702 Issued on August 17, 1999. Estimated Expiration Date: 
October 16, 2018. 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 16, 2018. 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 ReferencesAnti-backlash nut assembly Tool carrier assembly Feed screw device Electric gearshift mechanism for change-speed gearboxes of motor vehicles Patent #: 5689997 InventorsAssigneeApplicationNo. 173939 filed on 10/16/1998US Classes:74/424.95Independent nut segmentsExaminersPrimary: Jeffery, John A.Assistant: Fenstermacher, David Attorney, Agent or FirmForeign Patent References
International ClassF16H 055/17Foreign Application Priority Data1998-04-14 WOAbstractThe reinforced lead screw has a hollow, elongated reinforcing rail surrounding a lead screw and a nut-bearing movable along the reinforcing rail. The nut-bearing has a portion projecting through a slot in the reinforcing rail and includes threads to engage the threads on the lead screw such that when the lead screw is rotated in either direction, the nut will translate along the rail. A wedge is slidably mounted on the nut-bearing and is biased towards a central axis. The wedge has a pair of bearing surfaces which engage surfaces of the reinforcing rail to restrict rotation of the nut-bearing. The rail may be provided with a sleeve-bearing which, in combination with the rail, serves not only as a guide for movement of the nut but lateral support for the lead screw. | |
