Adam J Crowell, 5014140 SW Sexton Mountain Dr, Beaverton, OR 97008

7511443, Mar 31, 2009

Sep 30, 2005

11/241516

William T. Townsend - Weston MA, US
Adam Crowell - Beverly MA, US
Gill Pratt - Lexington MA, US
Traveler Hauptman - Watertown MA, US

Barrett Technology, Inc. - Cambridge MA

H01R 13/648

3185682, 439108, 439 92, 439 65, 700250, 165185

Featured is a controller for a motor that is ultra-compact, with a power density of at least about 20 watts per cubic cm (W/cm). The controller utilizes a common ground for power circuitry, which energizes the windings of the motor, and the signal circuitry, which controls this energization responsive to signals from one or more sensors. Also, the ground is held at a stable potential without galvanic isolation. The circuits, their components and connectors are sized and located to minimize their inductance and heat is dissipated by conduction to the controller's exterior such as by a thermally conductive and electrically insulating material (e. g. , potable epoxy). The controller uses a single current sensor for plural windings and preferably a single heat sensor within the controller. The body of the controller can also function as the sole plug connector.

7893644, Feb 22, 2011

Mar 30, 2009

12/383917

William T. Townsend - Weston MA, US
Adam Crowell - Watertown MA, US
Gill Pratt - Lexington MA, US
Traveler Hauptman - Karori, NZ

Barrett Technology, Inc. - Cambridge MA

G05B 19/414

318565, 3185682, 257701, 257602, 43962001, 361748, 361807, 36167901

Featured is a controller for a motor that is ultra-compact, with a power density of at least about 20 watts per cubic cm (W/cm). The controller utilizes a common ground for power circuitry, which energizes the windings of the motor, and the signal circuitry, which controls this energization responsive to signals from one or more sensors. Also, the ground is held at a stable potential without galvanic isolation. The circuits, their components and connectors are sized and located to minimize their inductance and heat is dissipated by conduction to the controller's exterior such as by a thermally conductive and electrically insulating material (e. g. , potable epoxy). The controller uses a single current sensor for plural windings and preferably a single heat sensor within the controller. The body of the controller can also function as the sole plug connector.

2004010, Jun 3, 2004

Sep 26, 2003

10/672888

William Townsend - Weston MA, US
Traveler Hauptman - Cambridge MA, US
Adam Crowell - Beverly MA, US
Brian Zenowich - Boston MA, US
John Lawson - Peterham MA, US
Vitaliy Krutik - Lynn MA, US
Burt Doo - Cambridge MA, US

B25J017/00

074/490010, 074/490050

A robotic device has a base and at least one finger having at least two links that are connected in series on rotary joints with at least two degrees of freedom. A brushless motor and an associated controller are located at each joint to produce a rotational movement of a link. Wires for electrical power and communication serially connect the controllers in a distributed control network. A network operating controller coordinates the operation of the network, including power distribution. At least one, but more typically two to five, wires interconnect all the controllers through one or more joints. Motor sensors and external world sensors monitor operating parameters of the robotic hand. The electrical signal output of the sensors can be input anywhere on the distributed control network. V-grooves on the robotic hand locate objects precisely and assist in gripping. The hand is sealed, immersible and has electrical connections through the rotary joints for anodizing in a single dunk without masking. In various forms, this intelligent, self-contained, dexterous hand, or combinations of such hands, can perform a wide variety of object gripping and manipulating tasks, as well as locomotion and combinations of locomotion and gripping.