Block for partially limiting a radiation beam, and a collimator comprising such blocks
Patent 4534052 Issued on August 6, 1985. Estimated Expiration Date: 
April 4, 2003. 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 4, 2003. 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 3151245 Shutter plate movement Electron accelerator comprising a target exposed to the electron beam Patent #: 4157475 InventorAssigneeApplicationNo. 06/481784 filed on 04/04/1983US Classes:378/152, With linear leaf motion378/150VariableExaminersPrimary: Smith, Alfred E.Assistant: Fields, Carolyn E. International ClassesG21K 1/02 (20060101)A61B 6/06 (20060101) G21K 1/04 (20060101) Foreign Application Priority Data1982-04-02 FRAbstractThe invention provides a block for partially limiting a radiation beam, allowing a first part of this beam to be limited corresponding to a first maximum half angle of opening.This rectilinearly movable block comprises a cylindrical active surface.Because of this active surface, said block defines new limits for the beam without modifying the starting orientation of this active surface in dependence on the positions which it may occupy through its rectilinear movement.Field of SearchRADIATION CONTROLLING MEANS | |
