Bradley Dee Canfield
Engineers in Orem, UT
License number
Utah 179476-2202
Issued Date
Sep 16, 1997
Expiration Date
Mar 31, 2017
Category
Engineer/Land Surveyor
Type
Professional Engineer
Address
Address
Orem, UT
Personal information
See more information about Bradley Dee Canfield at radaris.comName
Address
Phone
562 W 1240 N, Orem, UT 84057
Professional information
Semi-Permeable Diaphragm Sealing System
US Patent:
7236570, Jun 26, 2007
Filed:
Sep 29, 2004
Appl. No.:
10/953232
Inventors:
Bradley Dee Canfield - Orem UT, US
Assignee:
Varian Medical Systems Technologies, Inc. - Palo Alto CA
International Classification:
H01J 35/10
US Classification:
378141, 378200
Abstract:
A sealing system is disclosed for preventing liquid escape from the reservoir of an apparatus, such as an x-ray tube, that utilizes a diaphragm for maintaining constant liquid pressure in the reservoir. The sealing system of embodiments of the present invention contains liquid that leaks from the reservoir as a result of rupture or other failure of the diaphragm. In one embodiment, a diaphragm cooperates with an outer housing of an x-ray tube to define a reservoir for containing a cooling liquid. The diaphragm sealing system surrounds the diaphragm and includes a semi-permeable membrane that enables air to pass through to the diaphragm to expose it to atmospheric pressure for proper operation thereof. Upon diaphragm failure, the membrane has hydrophobic and oleophobic properties to prevent cooling liquid from escaping the diaphragm sealing system, and hence, the x-ray tube, thereby preventing the cooling liquid from presenting a health or safety hazard.
Multiple Energy X-Ray Source Assembly
US Patent:
7476023, Jan 13, 2009
Filed:
Jul 27, 2006
Appl. No.:
11/460581
Inventors:
Bradley Dee Canfield - Orem UT, US
James R. Boye - Salt Lake City UT, US
James R. Boye - Salt Lake City UT, US
Assignee:
Varian Medical Systems, Inc. - Palo Alto CA
International Classification:
H01J 35/16
US Classification:
378203, 378 9
Abstract:
A multiple energy x-ray source device is disclosed. Embodiments include a dual x-ray source comprised of two x-ray tubes mounted in separate housings. Each x-ray tube operates at a different power level, and each produces a characteristic x-ray signal. The x-ray sources are mounted on a common support structure, and are adjustable with respect to one another and with respect to the support structure so as to provide the ability to precisely align the focal spot of the x-ray signal emitted by each. Interconnection of the x-ray sources is provided by way of interlocking beam shields affixed to each source.
Cathode Assembly For An X-Ray Tube
US Patent:
8451976, May 28, 2013
Filed:
Jul 30, 2010
Appl. No.:
12/847947
Inventors:
Bradley D. Canfield - Orem UT, US
Assignee:
Varian Medical Systems, Inc. - Palo Alto CA
International Classification:
H01J 35/06
US Classification:
378136, 378138
Abstract:
A cathode assembly for an x-ray tube. In one example embodiment, a cathode assembly includes a cathode head, a filament, and first and second focusing tabs. The cathode head defines a recess having first and second open ends, a slot within the recess, and first and second tab stops within the recess. The filament is positioned within the slot. The first focusing tab is positioned in the first open end of the recess abutting the first tab stop. The second focusing tab is positioned in the second open end of the recess abutting the second tab stop.
Integrated Fluid Pump For Use In An X-Ray Tube
US Patent:
2006005, Mar 9, 2006
Filed:
Sep 9, 2004
Appl. No.:
10/937132
Inventors:
Gregory Andrews - Draper UT, US
Bradley Canfield - Orem UT, US
Bradley Canfield - Orem UT, US
International Classification:
H01J 35/12, H01J 35/10
US Classification:
378141000
Abstract:
An integrated fluid pump for use in circulating a coolant in an x-ray tube is disclosed. The pump includes a pump body, a pump head, and a motor. The pump head defines a pump volume and further includes a fluid inlet, a fluid outlet, and an impeller positioned in the pump volume that is rotatably driven by the motor to receive coolant from the fluid inlet and eject the fluid via the fluid outlet. The pump is structurally integrated with an outer housing of the x-ray tube, the outer housing containing the coolant. In one embodiment, the fluid inlet and a portion of the pump volume are defined by a portion of the outer housing of the x-ray tube. This integration makes the structural completeness of the fluid pump dependent on the outer housing or other suitable x-ray tube component.
Integral X-Ray Tube Shielding For High-Voltage X-Ray Tube Cables
US Patent:
2007029, Dec 20, 2007
Filed:
Jun 15, 2006
Appl. No.:
11/424439
Inventors:
Bradley D. Canfield - Orem UT, US
Assignee:
VARIAN MEDICAL SYSTEMS TECHNOLOGIES, INC. - Palo Alto CA
International Classification:
H05G 1/06
US Classification:
378194
Abstract:
A shielded high-voltage cable connector assembly configured and arranged to control the unintended emission of x-rays from certain regions of an x-ray tube. The cable connector assembly includes a body comprising a material that is substantially non-transmissive to x-rays. The body is configured accommodate a plurality of conductive elements and position the plurality of conductive elements to interface with corresponding conductive elements of an x-ray device. The cable connector assembly can also include a connector housing filled with a material that is substantially non-transmissive to x-rays.