C-motive Technologies Inc.

Tomotherapy Incorporated

Accuray Inc.

Graham T Reitz

Daniel Colin Ludois

Justin Kyle Reed

William D Butrymowicz

Baoyun Ge

Aditya N Ghule

Serge Kuro

Bradley J Brunker

Ryan Knippel

Brent Harper

Matthew Orton

Kevin Frankforter

Serge Nukhim Kuro

Matthew Maroon

Eric Schnarr

Kenneth Ruchala

Paul J Reckwerdt

Rob O'Connell

Robert O'Connell

Richard Cary Schmidt

Gerald D Fordyce, Ii

Yu Chen

Scott Finley

Ralph J Gable

Wayne L Staats, Jr

Robert Mastromattei

Matthew J Orton

Richard C Schmidt

An example electrostatic machine including a rotor stack comprising a plurality of a rotor plates each including a plurality of rotor electrodes positioned on each side of the rotor plate; and at least one rotor via comprising an electrical connection between the plurality of rotor electrodes on a first side of the rotor plate and the plurality of rotor electrodes on a second side of the rotor plate; and a stator stack comprising a plurality of stator plates, each including a plurality of stator electrodes positioned on each side of the stator plate; and at least one stator via comprising an electrical connection between the plurality of stator electrodes on a first side of the stator plate and the plurality of stator electrodes on a second side of the stator plate.

Electrostatic motor

An example system including an electrostatic machine including a rotor plate comprising a plurality of rotor electrodes, and rotatably fixed to a shaft configured to rotate about an axis; a stator plate comprising a plurality of stator electrodes, and rotatably fixed to a housing defining the rotor plate, the stator plate, and at least a portion of the shaft; an excitation circuit electrically; a controller, comprising: a rotor feedback circuit structured to interpret a voltage response value; a rotor position characterizing circuit structured to determine a voltage injection value; and a rotor position circuit structured to determine a calibrated rotor position value in response to the rotor position value; and wherein the excitation circuit is responsive to the voltage injection value to inject a voltage on at least one of the plurality of rotor electrodes or stator electrodes.

An example electrostatic machine includes a rotor plate and an adjacent stator plate, where the rotor plate or the stator plate includes a coupled bearing. The other one of the rotor plate or the adjacent stator plate includes a race radially aligned with the coupled bearing. The coupled bearing has a width with a first contact point on the first one of the rotor plate or stator plate and a second contact point on the race on the other one of the rotor plate or stator plate, where the coupled bearing is sized to maintain a minimum separation distance between the rotor plate and the stator plate.

Method of producing an electrostatic motor

An electrostatic machine includes a drive electrode and a stator electrode. The drive electrode and the stator electrode are separated by a gap and form a capacitor. The drive electrode is configured to move with respect to the stator electrode. The electrostatic machine further includes a housing configured to enclose the drive electrode and the stator electrode. The stator electrode is fixed to the housing. The electrostatic machine also includes a dielectric fluid that fills a void defined by the housing, the drive electrode, and the stator electrode. The dielectric fluid includes a ketone, malonate, or an oxalate.

Electrostatic machine system and method of operation

An example electrostatic machine includes a number of stator plates, each having a stator electrode and rotationally fixed to a housing, a shaft at least partially defined within the housing and configured to rotate about an axis, and a number of rotor plates, each having a rotor electrode and rotational fixed to the shaft. The electrostatic machine includes a dielectric fluid disposed in the housing, and that fills a gap between the stator plates and the rotor plates. The electrostatic machine includes a seal associated with the shaft, where the seal includes a material compatible with the dielectric fluid.

Electrostatic motor having fluid management features

An electrostatic machine includes a drive electrode and a stator electrode. The drive electrode and the stator electrode are separated by a gap and form a capacitor. The drive electrode is configured to move with respect to the stator electrode. The electrostatic machine further includes a housing configured to enclose the drive electrode and the stator electrode. The stator electrode is fixed to the housing. The electrostatic machine also includes a dielectric fluid that fills a void defined by the housing, the drive electrode, and the stator electrode. The dielectric fluid includes an ester.

Electrostatic machines that include a malonate in a dielectric fluid

A multi-leaf collimator with electromagnetically actuated leaves. The multi-leaf collimator includes a plurality of leaves, a leaf guide configured to support the plurality of leaves, and a plurality of magnets. Each leaf includes a blocking portion that is radio opaque, a drive portion connected to the blocking portion, and a coil embedded in the drive portion. The coil is operatively connected to an electrical current source to generate a first magnetic field. The first magnetic field interacts with the magnetic field generated by the magnet to thereby move the leave to a desired state. The leaves have the capability of moving at speeds of 50 cm/s up to and higher than 1 m/s.

Electromagnetically actuated multi-leaf collimator

System and method of determining whether a component of a radiation therapy system is operating within a dosimetric tolerance. The method can include the acts of generating a treatment plan for a patient, the treatment plan specifying a radiation amount to be delivered to the patient, delivering radiation to the patient according to the treatment plan, obtaining feedback during the delivery of radiation, the feedback related to one of a position, a velocity, and an acceleration for one of a multi-leaf collimator, a gantry, a couch, and a jaws, generating a mathematical model based on the feedback for one of the multi-leaf collimator, the gantry, the couch, and the jaws, calculating a delivered dose amount based on the mathematical model and treatment plan information, calculating a deviation in dose between the radiation amount specified in the treatment plan and the delivered dose amount, and determining whether the deviation in dose is within a dosimetric tolerance for the one of the multi-leaf collimator, the gantry, the couch, and the jaws.

Method and system for evaluating quality assurance criteria in delivery of a treatment plan

A patient support device of a radiation therapy treatment system includes an electromechanical motor and control system for moving the support device. The control system utilizes regenerative braking concepts, converting the motor into a generator as the support device is moved such that no matter the load, the support device will be moved at a constant speed. The control system also allows for moving of the support device in the powered off situation (i.e., when there is no power to the support device).

Patient support device and method of operation

A method and system configured to substantially synchronize two opposite ends of a table assembly of a radiation therapy treatment system. The system includes a lateral motion control system coupled to the table assembly and configured to detect positions of the two opposite ends of the table assembly and to substantially synchronize the positions as the table assembly is laterally moved with respect to a gantry of the radiation therapy treatment system.

Patient support device

A patient support device of a radiation therapy treatment system includes an electromechanical motor and control system for raising and lowering the support device in the Z direction. The control system utilizes regenerative braking concepts, converting the motor into a generator as the support device is lowered such that no matter the load, the support device will be lowered at a constant speed. The control system also allows for lowering of the support device in the powered off situation (i.e., when there is no power to the support device).

Growing community of inventors

Madison, WI, United States of America

Graham T Reitz