View
408
Download
1
Category
Preview:
DESCRIPTION
A small sample of the design, prototyping, research & development, and engineering support work I've done.
Citation preview
Design / Prototyping / Engineering
Sample Portfolio
Patrick A. Pickerell
Blood Glucose MeterBattery contact & mounting plate assembly design
Problem / Solution• Customer needed a custom conical compression
spring battery contact which would clear their enclosure design
• Original design called for riveting of the springs to the plate
• Provided customer with a prototype design which staked springs to plate, thereby reducing cost and increasing ease of assembly
• Worked directly with tooling department to develop tool for permanent attachment of springs to plate (via staking)
• Assembly prototype has been tested and released for production
Spectrophotometer High Voltage Pin Holder
Designed to maintain electrical contact in an extreme operating environment
Problem / Solution• Original customer design not manufacturable due
to part distortion from excessive material coining
• Part design changed to curved ‘finger’ design for increased manufacturability and part durability
• Application required a material which would be stable and retain the pin in a high voltage, 1000°F environment
• Selected A286 S.S. for raw material due to excellent high temperature performance & corrosion resistance
• Pin must be held securely with 10oz. weight suspended from pin with part in a vertical orientation while at 1000°F
• Heat/weight test passed: part now in production
Networking Cable Management“Carabiner” spring design
Problem / Solution• Customer had already decided upon a
“carabiner” spring design for user-friendly cable management but did not know how to design a spring that would achieve functional objectives for the product
• Used a rapid prototyped sample of customer’s product to develop a spring which would have the desired amount of “pop” when released without overcoming sample’s spring retaining detent
• Pre-plated music wire specified for its excellent performance in spring applications requiring high force and corrosion resistance
Server Rack Slot Door SpringCustom double torsion spring design
Problem / Solution
• Customer required high spring force to open a server rack slot door fully and rapidly but product design had very little space available in which to fit a spring
• Provided customer with a double torsion spring design that exceeded product performance requirements by using customer provided assembly solid model and spring analysis software
Endoscopic Needle Trocar PointMedical device reverse engineering
Problem / Solution
• Customer provided sample of the trocar geometry they desired but did not yet have solid models, production drawings, or measurements
• Customer asked that models & drawings be developed to match the sample’s point geometry and their requirements
• Point geometry (Lancet & Bevel angles) accurately measured using a combination of vision measuring machine, optical comparator, and fixtures
• Solid models & production drawings developed in 12 & 14g sizes including insertion depth laser marked bands
Brass Pawl for Prosthetic Hand
Assisting in the development of the Ellen Meadows Foundation’s LN-4 Prosthetic Hand
Problem / Solution
• Customer wanted to try a series of slightly different design geometries to achieve the best hand-opening action possible
• Worked directly with customer to create solid models and drawings for each revision and released drawings for prototype production
• Customer experimented with prototypes until a design with excellent action in the finished product was found
Bicycle Seat Post Quick Release Clamp
Problem / Solution
• New customer wanted a limited run of high-end titanium seat post clamps for an industry trade show but had no design
• Created an assembly design which used mill-turn, EDM, and screw machine operations to showcase in-house manufacturing capabilities
• Customer found prototype design to be lightweight, attractive, and functional
Assembly Animation
Recommended