Brian Nicholas Schaefer

US Patent:

20190078814, Mar 14, 2019

Filed:

Sep 8, 2017

Appl. No.:

15/698940

Inventors:

- Waltham MA, US
Theodore J. Conrad - Redondo Beach CA, US
Brian R. Schaefer - Huntington Beach CA, US

International Classification:

F25B 9/14
F25B 9/10

Abstract:

A pulse-tube cryocooler includes a compressor piston that is axially aligned with a pulse tube. The compressor piston is an annular piston that has a central hole around its axis. An inertance tube, connected to one end of the pulse tube, runs through the central hole in the compressor piston. The cryocooler also includes a balancer that moves in opposition to the compressor piston, to offset the forces in moving the compressor piston. The balancer may also be axially aligned with the pulse tube, the annular piston, and the inertance tube. The alignment of the compressor piston, the pulse tube, and the inertance tube aligns the forces produced by movement of fluid within the cryocooler. This makes it easier to cancel mechanical forces produced by the cryocooler in operation, since all (or most) of the forces are in a single axial direction.

US Patent:

20190003745, Jan 3, 2019

Filed:

Jul 3, 2018

Appl. No.:

16/026620

Inventors:

- Waltham MA, US
Ryan Yates - Los Angeles CA, US
Brian Schaefer - Huntington Beach CA, US

International Classification:

F25B 9/14
H02K 41/035

Abstract:

A cryogenic cooler includes a housing, and first, second, and third actuators. The first actuator includes at least one first voice coil and at least one first magnetic circuit, the at least one first voice coil of the first actuator configured to drive a compressor piston, the first actuator causing vibrations to the housing when driving the compressor piston. The second actuator includes at least one second voice coil and at least one second magnetic circuit, the at least one second voice coil of the second actuator configured to reduce the vibrations to the housing caused by driving the compressor piston. The third actuator includes at least one third voice coil and at least one third magnetic circuit, the third actuator configured to drive a displacer piston. The compressor piston, balance mechanism, and displacer piston are concentrically formed within the cryogenic cooler.

US Patent:

20180224059, Aug 9, 2018

Filed:

Feb 7, 2017

Appl. No.:

15/426451

Inventors:

- Waltham MA, US
Robert D. Schaefer - Huntington Beach CA, US
Andrew L. Bullard - Manhattan Beach CA, US
Brian R. Schaefer - Huntington Beach CA, US
Ryan Yates - Los Angeles CA, US

International Classification:

F16M 13/02
F25B 9/14

Abstract:

A system includes a device, a support structure, and a flexure bearing configured to connect the device to the support structure. The flexure bearing includes an outer hub and an inner hub, where the hubs are configured to be secured to the support structure and to the device. The flexure bearing also includes multiple sets of flexure arms connecting the outer hub and the inner hub, where each set of flexure arms includes symmetric flexure arms. The flexure bearing further includes multiple bridges, where each bridge connects one of the flexure arms in one set of flexure arms to one of the flexure arms in an adjacent set of flexure arms.

US Patent:

20150192329, Jul 9, 2015

Filed:

Jan 9, 2014

Appl. No.:

14/151408

Inventors:

- Waltham MA, US
Michael J. Ellis - Hawthorne CA, US
Lowell A. Bellis - Long Beach CA, US
James R. Chow - San Gabriel CA, US
Brian R. Schaefer - Huntington Beach CA, US
Troy T. Matsuoka - Torrance CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

F25B 9/14

Abstract:

An apparatus includes a regenerator configured to transfer heat to a fluid and to absorb heat from the fluid as the fluid flows between a warm end and a cold end of a cryocooler. The regenerator includes an anisotropic thermal layer configured to reduce a flow of heat axially along the regenerator and to spread the absorbed heat radially or laterally in a plane of the anisotropic thermal layer. The anisotropic thermal layer includes at least one allotropic form of carbon. The anisotropic thermal layer could have a higher radial or lateral thermal conductivity and a lower axial thermal conductivity. The anisotropic thermal layer could include carbon nanotubes and/or graphene. The regenerator could include multiple anisotropic thermal layers that divide the regenerator into multiple segments, where the anisotropic thermal layers are configured to reduce heat transfer between adjacent segments of the regenerator.

US Patent:

20150041619, Feb 12, 2015

Filed:

Aug 9, 2013

Appl. No.:

13/963842

Inventors:

- Waltham MA, US
Lowell A. BELLIS - Long Beach CA, US
Brian R. SCHAEFER - Huntington Beach CA, US
Robert D. SCHAEFER - Huntington Beach CA, US
Marco K. KWAN - Redondo Beach CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

F16M 13/02

US Classification:

248603

Abstract:

A system includes a device, a support structure, and a flexure bearing configured to connect the device to the support structure. The flexure bearing includes an outer hub and an inner hub, where the hubs are configured to be secured to the support structure and to the device. The flexure bearing also includes multiple sets of flexure arms connecting the outer and inner hubs. Each set of flexure arms includes symmetric flexure arms. The flexure bearing could include three sets of flexure arms positioned radially around a central axis of the flexure bearing and having a spacing of about 120. Each flexure arm can follow a substantially curved path between the outer hub and the inner hub. The symmetric flexure arms in each set can be configured such that twisting of one flexure arm in one set is substantially counteracted by twisting of another flexure arm in that set.

Address:

157 Kings Row St, Carbondale, CO 81623

Phone:

(970)6189033

VIN:

4S4BRDLCXC2221735

Make:

SUBARU

Model:

OUTBACK

Year:

2012