专利检索 ap:("California Institute of Technology" OR "The Government of the United States of America, as represented by the Secretary of the Navy") AND inv:"Richard R. HOFER" 第 1 页

1.

发明公开
GRAPHITE/HEXAGONAL BORON NITRIDE BIMATERIALS FOR ELECTRIC PROPULSION 审中-公开

公开(公告)号：US20240068453A1

公开(公告)日：2024-02-29

申请号：US18238101

申请日：2023-08-25

申请人： California Institute of Technology , The Government of the United States of America, as represented by the Secretary of the Navy

发明人： Celia S. CHARI , Katherine T. FABER , Bryan W. McENERNEY , Richard R. HOFER , James A. WOLLMERSHAUSER , Edward P. GORZKOWSKI, III

IPC分类号： F03H1/00 , C01B32/21

CPC分类号： F03H1/0006 , C01B32/21 , B64G1/413

摘要： Aspects disclosed herein include graphite and hexagonal boron nitride bimaterials, methods of making these bimaterials, and electric propulsion devices or thrusters with these bimaterials. Aspects disclosed herein include electric propulsion devices comprising: at least one portion comprising or formed of a monolithic bimaterial; wherein the monolithic bimaterial comprises a graphite material and a hexagonal boron nitride material; and wherein the graphite material and hexagonal boron nitride material are monolithically integrated in the bimaterial.

2.

发明申请
HALL EFFECT THRUSTER ELECTRICAL CONFIGURATION 审中-公开

公开(公告)号：US20170284380A1

公开(公告)日：2017-10-05

申请号：US15474480

申请日：2017-03-30

申请人： CALIFORNIA INSTITUTE OF TECHNOLOGY

发明人： Richard R. HOFER , Benjamin A. JORNS , Ira KATZ , John R. BROPHY

IPC分类号： F03H1/00 , H05H1/54 , B64G1/40

摘要： A Hall thruster is configured to reduce or eliminate pole erosion by electrically tying the cathode to the thruster chassis body. The electrical connection controls the ion energy hence reducing erosion at the pole. In a different configuration, the cathode is biased by a power supply, allowing further control of the ion energy and the elimination of pole erosion, thus increasing the thruster's operational lifetime.

3.

发明申请
LOW-POWER HALL THRUSTER WITH AN INTERNALLY MOUNTED LOW-CURRENT HOLLOW CATHODE 审中-公开

公开(公告)号：US20200317374A1

公开(公告)日：2020-10-08

申请号：US16904440

申请日：2020-06-17

申请人： CALIFORNIA INSTITUTE OF TECHNOLOGY

发明人： Ryan W. CONVERSANO , Dan M. GOEBEL , Ira KATZ , Richard R. HOFER

IPC分类号： B64G1/40 , F03H1/00

摘要： A low-power Hall thruster gains significantly improved efficiency by a combination of features, including a single piece, h-shaped magnetic screen which enables a more efficient internal volume utilization as well as optimal magnetic shielding; an internally mounted cathode with varying diameter further decreases the footprint of the thruster; an anode with multiple baffles connected by axially oriented holes generates a highly azimuthally uniform propellant flow.