Actuator for pivot chuck
Patent 6397727 Issued on June 4, 2002. Estimated Expiration Date: 
January 18, 2021. 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.
January 18, 2021. 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 ReferencesChuck with two oppositely disposed clamping jaws Rotary-linear unit Patent #: 5367943 InventorAssigneeApplicationNo. 766828 filed on 01/18/2001US Classes:92/2, ONE WORKING MEMBER RECIPROCATES AND ANOTHER ROTATES COMMON OUTPUT MEMBER91/61ROTARY AND RECIPROCATING WORKING MEMBERSExaminersPrimary: Look, Edward K.Assistant: Lazo, Thomas E. Attorney, Agent or FirmForeign Patent References
International ClassF01B 021/00Foreign Application Priority Data2000-01-19 DEAbstractA pivot-chuck actuator has a housing extending along an axis, a piston chamber centered on the axis, and a vane chamber offset and separate from the piston chamber. A piston is axially displaceable in the piston chamber and axially fixed to a shaft extending from the housing on the axis. A vane element on the shaft angularly subdivides the vane chamber into a pair of angularly offset compartments and formations rotationally couple the vane element to the shaft for joint rotation therewith while permitting relatively axial movement of the vane element and shaft. The compartments can be alternately pressurized to rotate the vane element and shaft about the axis. A pair of counterweights angularly fixed on the shaft axially flank the vane element to allow the actuator to operate at very high speeds.Field of SearchONE WORKING MEMBER RECIPROCATES AND ANOTHER ROTATES COMMON OUTPUT MEMBERRECTILINEARLY MOVING WORKING MEMBER AND COAXIAL OR PARALLEL ELEMENT SLIDABLY INTERENGAGED FOR RELATIVE ROTARY MOVEMENT Element extends through working member portion Rigid stem on first working member portion extends through second working member Moving cylinders Interconnected with common rotatable shaft WITH MOVEMENT DAMPING MEANS (E.G., FLUID FLOW RESTRICTOR) ROTARY AND RECIPROCATING WORKING MEMBERS WITH FLUID-PRESSURE ACTUATOR | |
