Gregory John Stevenson

US Patent:

8360917, Jan 29, 2013

Filed:

Apr 15, 2010

Appl. No.:

12/760823

Inventors:

Jon M. Nichols - Georgetown TX, US
Gregory G. Stevenson - Austin TX, US
Brad P. Pohl - Leander TX, US
Fernand A. Thomassy - Liberty Hill TX, US
Charles B. Lohr - Austin TX, US
Jeremy Carter - Austin TX, US
John W. Sherrill - Round Rock TX, US
Brian B. Sweet - Leander TX, US

Assignee:

Fallbrook Intellectual Property Company LLC - San Diego CA

International Classification:

F16H 15/48
F16H 15/26
F16H 13/08

US Classification:

475189, 475196, 476 38

Abstract:

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT). In one embodiment, a control system is adapted to facilitate a change in the ratio of a CVT. In another embodiment, a control system includes a stator plate configured to have a plurality of radially offset slots. Various inventive traction planet assemblies and stator plates can be used to facilitate shifting the ratio of a CVT. In some embodiments, the traction planet assemblies include planet axles configured to cooperate with the stator plate. In one embodiment, the stator plate is configured to rotate and apply a skew condition to each of the planet axles. In some embodiments, a stator driver is operably coupled to the stator plate. Embodiments of a traction sun are adapted to cooperate with other components of the CVT to support operation and/or functionality of the CVT.

US Patent:

8535199, Sep 17, 2013

Filed:

Jun 6, 2008

Appl. No.:

12/995087

Inventors:

Charles Lohr - Austin TX, US
Gregory G Stevenson - Austin TX, US

Assignee:

Fallbrook Intellectual Property Company LLC - Cedar Park TX

International Classification:

F16H 15/36

US Classification:

476 38, 744731

Abstract:

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously and infinitely variable transmissions (IVT). In one embodiment, a variator is adapted to receive a control system that cooperates with a shift nut to actuate a ratio change in an IVT. In another embodiment, a neutral lock-out mechanism is adapted to cooperate with the variator to, among other things, disengage an output shaft from a variator. Various inventive mechanical couplings, such as an output engagement mechanism, are provided to facilitate a change in the ratio of an IVT for maintaining a powered zero operating condition. In one embodiment, the output engagement mechanism selectively couples an output member of the variator to a ratio adjuster of the variator. Embodiments of a ratio adjuster cooperate with other components of the IVT to support operation and/or functionality of the IVT. Among other things, user control interfaces for an IVT are disclosed.

US Patent:

20130102434, Apr 25, 2013

Filed:

Dec 17, 2012

Appl. No.:

13/717197

Inventors:

Fallbrook Intellectual Property Company LLC - San Diego CA, US
Gregory G. Stevenson - Austin TX, US
Brad P. Pohl - Leander TX, US
Fernand A. Thomassy - Liberty Hill TX, US
Charles B. Lohr - Austin TX, US
Jeremy Carter - Austin TX, US
John W. Sherrill - Round Rock TX, US
Brian B. Sweet - Leander TX, US

Assignee:

FALLBROOK INTELLECTUAL PROPERTY COMPANY LLC - San Diego CA

International Classification:

F16H 15/50

US Classification:

475189

Abstract:

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT). In one embodiment, a control system is adapted to facilitate a change in the ratio of a CVT. In another embodiment, a control system includes a stator plate configured to have a plurality of radially offset slots. Various inventive traction planet assemblies and stator plates can be used to facilitate shifting the ratio of a CVT. In some embodiments, the traction planet assemblies include planet axles configured to cooperate with the stator plate. In one embodiment, the stator plate is configured to rotate and apply a skew condition to each of the planet axles. In some embodiments, a stator driver is operably coupled to the stator plate. Embodiments of a traction sun are adapted to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Among other things, shift control interfaces for a CVT are disclosed.

US Patent:

20140011628, Jan 9, 2014

Filed:

Sep 12, 2013

Appl. No.:

14/024955

Inventors:

Gregory G. Stevenson - Austin TX, US

Assignee:

Fallbrook Intellectual Property Company LLC - Cedar Park TX

International Classification:

F16H 61/664
F16H 15/40

US Classification:

476 1, 476 38

Abstract:

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously and infinitely variable transmissions (IVT). In one embodiment, a variator is adapted to receive a control system that cooperates with a shift nut to actuate a ratio change in an IVT. In another embodiment, a neutral lock-out mechanism is adapted to cooperate with the variator to, among other things, disengage an output shaft from a variator. Various inventive mechanical couplings, such as an output engagement mechanism, are provided to facilitate a change in the ratio of an IVT for maintaining a powered zero operating condition. In one embodiment, the output engagement mechanism selectively couples an output member of the variator to a ratio adjuster of the variator. Embodiments of a ratio adjuster cooperate with other components of the IVT to support operation and/or functionality of the IVT. Among other things, user control interfaces for an IVT are disclosed.

US Patent:

20210384811, Dec 9, 2021

Filed:

May 23, 2019

Appl. No.:

16/963950

Inventors:

- San Francisco CA, US
Adam Daniel Ambrecht - Kennesaw GA, US
Gregory Gordon Stevenson - Austin TX, US

International Classification:

H02K 41/06
H02K 7/116
H02K 9/193

Abstract:

An electric motor has a stator mechanically coupled to the rotor by a nutating traction interface, such that during nutation of the rotor with respect to the stator a tilt axis of the rotor progresses about the axis of rotation of the output shaft. The rotor and a surface of the stator bound a dynamic gap across which a magnetic field is produced by electrical activation of the motor to generate a force between the rotor and the stator. The traction interface and the gap are arranged such that, in a plane containing the axis of rotation of the output shaft, the traction interface is angled with respect to the stator surface bounding the gap. The rotor is connected to the output shaft by a tiltable connection such as a gimbal.

US Patent:

20200052557, Feb 13, 2020

Filed:

Aug 7, 2019

Appl. No.:

16/534217

Inventors:

- San Francisco CA, US
Gregory Gordon Stevenson - Austin TX, US
Adam Daniel Ambrecht - Kennesaw GA, US
Euzeli Cipriano dos Santos, JR. - Zionsville IN, US

Assignee:

TAU MOTORS, INC. - San Francisco CA

International Classification:

H02K 11/028
H02P 23/14
H02K 1/24
H02K 1/16
H02K 1/02

Abstract:

An electric motor has a stator defining multiple stator poles with associated electrical windings, and a rotor having multiple rotor poles. The rotor has flux barriers between adjacent rotor poles, the flux barriers each having a material with an electrical conductivity higher than the rotor pole material. The flux barriers are electrically isolated from one another external to the ferromagnetic material. Eddy currents are induced in the flux barrier to cause destructive interference of an impending magnetic field, such that the flux barrier effectively acts to inhibit magnetic flux during motor operation, which in some cases will result in a repulsive force that will act to increase an induced motive force on the rotor poles.

US Patent:

20180245674, Aug 30, 2018

Filed:

Aug 8, 2016

Appl. No.:

15/751219

Inventors:

- MAUMEE OH, US
Stijn GOOSSENS - ERPE-MERE, BE
Gordon M. MCINDOE - VOLENTE TX, US
T. Neil MCLEMORE - GEORGETOWN TX, US
Matthew SIMISTER - AUSTIN TX, US
Gregory G. STEVENSON - AUSTIN TX, US
Mark R. J. VERSTEYHE - OOSTKAMP, BE
Thomas J. VYNCKE - DEINZE, BE

International Classification:

F16H 15/50
F16H 61/664
F16H 61/30
F16H 63/06
F16H 61/00

Abstract:

This invention relates to controlling the speed ratio of a Continuous Variable Transmission with a hydraulic method. The Ball Planetary CVT design is adapted with a mechanical and hydraulic addition. The carrier of the ball-type variator is supported by hydraulic actuators. The result is that the speed ratio is controlled by both a set speed ratio and the torque flowing through the CVT. Subsequently, torque peaks are avoided and controllability of the CVT is increased.

US Patent:

20180202527, Jul 19, 2018

Filed:

Mar 16, 2018

Appl. No.:

15/924080

Inventors:

- Cedar Park TX, US
Gregory G. Stevenson - Austin TX, US
Brad P. Pohl - Leander TX, US
Fernand A. Thomassy - Liberty Hill TX, US
Charles B. Lohr - Austin TX, US
Jeremy Carter - Austin TX, US
John W. Sherrill - Round Rock TX, US
Brian B. Sweet - Leander TX, US

International Classification:

F16H 37/02
F16H 63/06
F16H 61/664
B62M 11/16
F16H 15/50
F16H 15/28
F16H 15/52

Abstract:

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT). In one embodiment, a control system is adapted to facilitate a change in the ratio of a CVT. In another embodiment, a control system includes a stator plate configured to have a plurality of radially offset slots. Various inventive traction planet assemblies and stator plates can be used to facilitate shifting the ratio of a CVT. In some embodiments, the traction planet assemblies include planet axles configured to cooperate with the stator plate. In one embodiment, the stator plate is configured to rotate and apply a skew condition to each of the planet axles. In some embodiments, a stator driver is operably coupled to the stator plate. Embodiments of a traction sun are adapted to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Among other things, shift control interfaces for a CVT are disclosed.