Orange Telecom wanted to develop two concept mechanisms. One was a mouse form factor that dynamically presented braille characters and other page characteristics to a user as they moved the mouse across the page. The mechanism used a series of circulating shuttles that were configured by a single set of bimetal strips actuators before being presented to the user as they circulated through a track. The second was a reverse trackball that would guide a user spatially by moving in a specific direction under the user’s finger. The ball was driven by two orthogonal friction drive rollers mated with an IMU to track device position and direction as well as a laser mouse sensor to track ball motion and enable closed loop control. I supported the mechanism research and concept development for the circulating shuttle device and owned the electromechanical design and packaging for ball device.

orange telco

Developed a turnstile device for L3 detection that facilitated taking aerosol samples from passing users which were then passed to a compact spectrophotometer for analysis. Built system mockups and prototypes of the pneumatic sampling components.

Supported iRobot in their development of the Scooba mopping robot. I personally owned the mechanical architecture of the charging station, power supply enclosure, and handle. And also provided support on the cleaning head mechanism.

Scooba

Developed a prototype home assistant robot for iRobot targeted towards Asian markets where raised door thresholds were a concern. The device had two large drive wheels, integrated an on-board display, and had an articulating backlit head. I was responsible for the drive design and integration including motor selection and integration. I developed a custom castellated drive wheel design and “crab-walk” approach to passing over thresholds while still ensuring smooth operation on flat surfaces.

cici

Worked on a team developing a robotic controlled medication handling machine for use in hospitals for Cerner (now Oracle health). The vending machine sized device would receive secure cassettes of tracked consumables packed in the pharmacy and a robotic stage would securely unpack the cassettes and load them into on-board storage and then dispense them to health care providers on demand as part of an integration inventory management system. I was responsible for the dispensing mechanism and overall frame and gantry design. We built functional prototypes for display at a tradeshow.

cerner

Developed a passive method to warm refrigerated blood in ambulatory settings for Smiths medical. Explored and contrasted different ways to generate, transfer, and control heat delivered to the blood in order to address the problem of lowering a patient’s core body temperature when providing emergency blood infusions (pre cost and volume-effective battery systems). Proposed solution used oxidation enthalpy as used in disposable hand warmers which was simple, mass/volume efficient, and intrinsically fail-safe.

Designed a portable platform for Comrex that enabled in-the-field broadcasting using their proprietary codecs.

Comrex

Provided design support for the original Telequip T-flex coin dispenser(still used in many grocery stores and counter-service restaurants.

Telequip

Engineered medical powder aerosol delivery systems for Harvard lab spin-off startup. Researched different methods for aerosolizing engineered powders and developed a novel dispensing and aerosolizing device along with associated test and verification equipment.

An outdoor enthusiast entrepreneur wanted to sell concentrated oxygen to high altitude recreational environments such as ski resorts. We studied other supplemental oxygen applications and converged on pressurized gas-state oxygen in thin wall aluminum aerosol cans as the most effective form factor. We then developed a mouthpiece and button that utilized entrainment to dilute the dispensed oxygen and enable a higher concentration in the can.

Go2

Canadian Aviation Electronics was developing a next generation flight simulator and the ID team had been charged with the interior design. I took the ID CAD for the console and develop a locking friction mechanism for setting the display positions. I then created part breaks and assembly details for the remaining components and generated fabrication drawings for handoff to the in house engineering team.

Simulator

A local RFID reader company needed to package a new antenna design in an enclosure. I worked with ID to design and prototype the device.

RFID

A medical device manufacturer was developing a shaker device for agitating biological samples. The current latching mechanism was failing during testing and we were tasked with developing an alternate design. I used FEA to evaluate the baseline design against the requirements and then took a proposed alternate mechanism and sized the wall thickness and ribs based on simulation results.

shaker

a CPG company was developing a new aerosol spray can head that had failed drop testing. I used conservation equations to quantify the energy transferred during a drop and then iteratively established a static load requirement based on deflection and a linear elastic assumption. I was then able to propose strategic improvements to the component design to reduce stress in failing areas while maintaining overall compliance.

Aerosol

A company which distributed marketing flyers wanted to develop a device that would attach to a car or building and dispense flyers one at a time. I took a mostly completed design and resized the constant force springs, ran tolerance analyses, and created mechanical drawings.

flyer