Rotary actuator
Patent 4373426 Issued on February 15, 1983. Estimated Expiration Date: 
November 3, 2000. 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.
November 3, 2000. 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 2688951 2959064 3175725 3786728 Torque applicator Patent #: 4152972 InventorApplicationNo. 06/203156 filed on 11/03/1980US Classes:91/396, Part forms throttle member92/169.2, With reinforcing member92/33, Element extends through working member portion92/85BFluid springExaminersPrimary: Maslousky, Paul E.Attorney, Agent or FirmInternational ClassesF15B 15/00 (20060101)F15B 15/08 (20060101) AbstractA helical rotary actuator has a torque transmitting section that can be a sealing section or a clearance section but which is welded to a ring gear so that torque forces imposed on the ring gear can be carried through the torque transmitting section to the base of the actuator. In the method of fabrication, the splines on the ring gear are cut after a weldment is made between the ring gear and the torque transmitting section of the cylinder. The pistons within the cylinder are hydraulically cushioned. | |
