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Class Information
Number: 976/DIG.125
Name: Nuclear technology > Control of nuclear reaction [g21c-7/00] > By application of neutron-absorbing material (i.e., material with absorption cross section very much in excess of reflection cross section) [g21c-7/06] > By displacement of solid control elements (e.g., control rods) [g21c-7/08] > Means for moving control elements to desired position [g21c-7/12]
Description:










Sub-classes under this class:

Class Number Class Name Patents
976/DIG.127 Hydraulic or pneumatic drive [g21c-7/16] 25
976/DIG.126 Mechanical drive arrangements [g21c-7/14] 22


Patents under this class:
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Patent Number Title Of Patent Date Issued
5089211 Control rod drive Feb. 18, 1992
5069860 Rotary lock for a control rod drive Dec. 3, 1991
5066451 Single-step multiple repositionings of control rod cluster assembly during each nuclear reactor fuel cycle Nov. 19, 1991
5059382 Method of renovating the control system for controlling control clusters in a nuclear reactor, and a corresponding control system Oct. 22, 1991
5031816 Control rod canopy seal positioning and welding system Jul. 16, 1991
5019325 Method for removing and installing a control rod drive May. 28, 1991
5011649 Calibration of rod position indicators Apr. 30, 1991
4973443 System for removing and installing a control rod drive Nov. 27, 1990
4965040 Maximum/minimum asymmetric rod detection Oct. 23, 1990
4954311 Control rod housing alignment Sep. 4, 1990
4880596 Thermionic switched self-actuating reactor shutdown system Nov. 14, 1989
4816206 Nuclear reactor control bar drive device Mar. 28, 1989
4777010 Rod drive control system for nuclear reactors Oct. 11, 1988
4756868 Mechanism for controlling and securing a control bar in a liquid cooled nuclear reactor Jul. 12, 1988
4755346 Device for displacing and latching a cluster of control elements in a nuclear reactor Jul. 5, 1988
4753769 Device and method for retaining a linearly movable element in a nuclear reactor Jun. 28, 1988
4752434 Control bar and drive mechanism coupling device Jun. 21, 1988
4734252 Nuclear reactor shutdown control rod assembly Mar. 29, 1988
4714584 Flow limiting head adapter extension Dec. 22, 1987
4714582 Actuating device for linearly moving a cluster of control elements in a nuclear reactor Dec. 22, 1987
4708843 Control unit for a nuclear reactor Nov. 24, 1987
4678623 Modular head assembly and method of retrofitting existing nuclear reactor facilities Jul. 7, 1987
4666657 Remotely adjustable intermediate seismic support May. 19, 1987
4618471 Electromagnetic safety device of a screw/nut type Oct. 21, 1986
4597934 Multi-function magnetic jack control drive mechanism Jul. 1, 1986
4587084 Control rod drive May. 6, 1986
4582675 Magnetic switch for reactor control rod Apr. 15, 1986
4576780 Releasable anti-ejection device for the control rods of a nuclear reactor Mar. 18, 1986
4550941 Hydraulic drive mechanism Nov. 5, 1985
4521370 Control of nuclear reactors Jun. 4, 1985
4518559 Control of nuclear reactors May. 21, 1985
4508984 Variable reluctance electric motor for the translation of control rods in a nuclear reactor Apr. 2, 1985
4484093 Linear motion device and method for inserting and withdrawing control rods Nov. 20, 1984
4481164 Reactivity control assembly for nuclear reactor Nov. 6, 1984
4476086 Coupler for nuclear reactor absorber rods Oct. 9, 1984
4472348 Operating devices for control rods in a nuclear reactor Sep. 18, 1984
4439054 Latching mechanism Mar. 27, 1984
4423002 Apparatus for controlling a nuclear reactor by vertical displacement of a unit absorbing neutrons Dec. 27, 1983
4412968 Nuclear reactor control apparatus Nov. 1, 1983
4411857 Nuclear reactor control apparatus Oct. 25, 1983
4382711 Device for the remote coupling and uncoupling of two elements of great length disposed coaxially and end to end May. 10, 1983
4314882 Device for actuating a nuclear reactor control rod Feb. 9, 1982
4304632 Nuclear reactor shutdown system Dec. 8, 1981
4293381 Nuclear reactor having control rod holding latch Oct. 6, 1981
4292133 Method of and apparatus for replacing control rod drive Sep. 29, 1981
4292131 Coupling mechanism of control rod for nuclear reactor Sep. 29, 1981
4278498 Earthquake-proof mounting support for control-rod drives of nuclear reactors Jul. 14, 1981
4238288 Drive of nuclear reactor S control element Dec. 9, 1980
4233115 Safety apparatus for a nuclear reactor Nov. 11, 1980
4227967 Method and apparatus for reducing the power level in a nuclear reactor during temperature transient Oct. 14, 1980

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