Jianjuen J Hu

20060209019, Sep 21, 2006

Jun 1, 2005

11/141828

Jianjuen Hu - Boxborough MA, US

Energid Technologies Corporation - Cambridge MA

G09G 5/00

345156000

A haptic feedback system comprises a moveable device with at least three degrees of freedom in an operating space. A display device is operative to present a dynamic virtual environment. A controller is operative to generate display signals to the display device for presentation of a dynamic virtual environment corresponding to the operating space, including an icon corresponding to the position of the moveable device in the virtual environment. An actuator of the haptic feedback system comprises a stator having an array of independently controllable electromagnet coils. By selectively energizing at least a subset of the electromagnetic coils, the stator generates a net magnetic force on the moveable device in the operating space. In certain exemplary embodiments the actuator has a controllably moveable stage positioning the stator in response to movement of the moveable device, resulting in a larger operating area. A detector of the system, optionally multiple sensors of different types, is operative to detect at least the position of the moveable device in the operating space and to generate corresponding detection signals to the controller. The controller receives and processes detection signals from the detection sensor and generates corresponding control signals to the actuator to control the net magnetic force on the moveable device.

20090123896, May 14, 2009

Jun 27, 2008

12/147863

Jianjuen Hu - Boxborough MA, US
Gill Pratt - Lexington MA, US
Jeff Weber - San Francisco CA, US

G09B 23/28

434262

A haptic simulation method determines a location of a needle assembly within a magneto-rheological fluid. The needle assembly within the magneto-rheological fluid is associated with a desired resistance value. A viscosity control signal representative of the desired resistance value is generated. The viscosity control signal is applied to a viscosity control device to vary a viscosity of the magneto-rheological fluid to achieve the desired resistance value.

20150182403, Jul 2, 2015

Jan 2, 2014

14/146472

Yi-Je Lim - Boxborough MA, US
Jianjuen Hu - Boxborough MA, US
Harrison Roberts - Boxborough MA, US
Suzana Makowski - Grafton MA, US

A61G 7/10

Obesity has grown into one of the world's most significant health problems. The field of bariatrics and the quantity of bariatric surgical procedures is projected to continue to increase rapidly each year. This trend presents a challenge to healthcare providers and facilities striving to provide dignified care that is effective and safe both for the patient and the provider. There is a great demand for new approaches to bariatric patient care. The present invention is a robotic patient lifting system, targeted for, but not limited to, bariatric patient care. Without the need for difficult, time consuming slings and hoists associated with currently available systems, the invented lifting and transferring system utilizes rapidly deployable, articulated robotic arms with gentle conveyor belts. A unique linkage system allows powerful, safe, and flexible lifting and positioning of the patient with a minimal number of actuators. The lifting mechanism is mounted on a low profile, stable and flexible footprint, omnidirectional robotic mobile base. A simple, intuitive user interface allows control by a single caregiver with minimal training

20140100491, Apr 10, 2014

Oct 5, 2012

13/646368

Jianjuen Hu - Boxborough MA, US
Yi-Je Lim - Boxborough MA, US
Paolo Bonato - Somerville MA, US
Jienan Ding - Watertown MA, US

A61H 3/00
A61H 1/00

601 27, 601 35, 601 23

To achieve “ecological” robotic rehabilitation therapy, the present invention provides the system capacity of training of patients in different ambulatory tasks utilizing motorized footplates that guide the lower limbs according to human gait trajectories generated for different ambulatory tasks of interest. A lower extremity robotic rehabilitation system comprises an active pelvic/hip device which applies series elastic actuation to achieve an intrinsically safe and desirable impedance control. A robotic unit features the telepresence operation control that allows a patient stay at home or nursing home to continue his or her rehabilitation training under a physician's remote supervision and monitoring. The robot unit utilizes an affective patient-robot interface to capture emotional information of the patient, to allow for real-time adaptation of the robotic system and adjustments of treatment protocol, and to enhance the quality and effectiveness of rehabilitation