Unit for grasping and clamping circular objects
Patent 5201501 Issued on April 13, 1993. Estimated Expiration Date: 
February 11, 2012. 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.
February 11, 2012. 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 2160378 2914026 3595557 Pipe gripping vise Adjustable smooth action linkage gripper mechanism Clamp for fitting to a conveyor of an automatic cabling machine and intended to hold one or more electrically conductive wires Patent #: 4877228 InventorAssigneeApplicationNo. 833875 filed on 02/11/1992US Classes:269/32, Mechanical means between fluid means and jaw269/24, Plural positioning means sequentially operated269/34, Single fluid unit moves plural spaced jaws269/35, With guide means269/156, Three coacting work grippers294/88, Magnet- or piston-controlled294/106, Pivoted jaws294/902GRIPPING ELEMENTExaminersPrimary: Swann, J. J.Attorney, Agent or FirmForeign Patent References
International ClassB23Q 003/08Foreign Application Priority Data1991-02-18 FRAbstractA unit is provided for grasping and clamping generally circular shaped parts such as lenses, comprising a central body on which three grasping and clamping elements are mounted adapted to bear tangentially on said part at three points or regions of tangential contact forming, pairwise, angles greater than 90°, one of the grasping and clamping elements being arranged to lie on the axis of said central body at one end of a movable central push rod, the other two said elements being arranged symmetrically with respect to said axis at the distal end of two levers, the push rod being urged by at least one clamping spring in the axial clamping direction, and the other two elements being urged to rotate in the direction of clamping by at least one lever-action producing spring, release of clamping being obtained by application of fluid pressure to a piston adapted to operate in opposition to said clamping spring.Field of SearchPlural positioning means sequentially operatedCylinder-piston means directly moves jaw(s) Cylinder-piston means in series with additional positioning means Mechanical means between fluid means and jaw Single fluid unit moves plural spaced jaws With guide means Including pivoted yoke frame jaw carrier One jaw common to plural coacting jaws Three coacting work grippers Coil spring | |
