1. Team: John Robey, Zachary Werber, David Prier, Cody Hannan, Enis Inan
Moveable Hatch
Team: John Robey, Zachary Werber, David Prier, Cody Hannan, Enis Inan
Sponsor: Zdenek Zumr

2. Project Background Separate a two story home
Keep functionality of stairs
Blend in with existing home
Allow privacy for both floors
Increased revenue

3. Product Design Specifications

8. Mapping the House

9. Hatch Design

10. Hinge Design Provide flush to flush movement
Allow for locking in closed position
Support the weight of the hatch

11. Hinge Fabrication Construction Laser cut 3/16” steel plate.
All parts welded to hinge back plate.
Steel bar cut down, milled, drilled, and tapped to form hinge arms & clevis.
Shoulder bolts for pins.
Challenges
Laser cutter
Alignment (multiple axes of rotation)
Welding

12. Test Stand Frame Standard 2x4 kiln dried stud construction.
Studs are 16” on center.
3” construction screws.

13. Test Stand Actuation
12V DC power supply fed into a dual-pole, dual-throw rocker switch that will supply power to both actuators
Previously used a 9” and a 24” actuator, found speed and throw length made deployment unstable. Switched to two 9” actuators yesterday.
Both 9” actuators will hit their internal limit switches to turn off, an optional limit switch can be attached.

14. Test Stand Hatch Construction 1” square 16 gauge steel tubing.
¾ “ oak faced plywood.
⅜” hardwood flooring.
Wood products attached with sheet metal screws and finishing nails.
Hinge and actuator attachment points welded to steel tube frame.

15. Test Stand Fabrication

16. Test Stand Findings
Hinge requires very precise alignment or it will bind up during motion.
Hinge required an additional curved arm to reach its current complete design.
Identical 9” actuators are not identical.
Hatch flexes when jumped on.
Actuators and hinge bear a large portion of weight when in the horizontal position.
Deadbolt bracket requires tighter tolerances for more rigidity when engaged.

17. Special Mention
Sulzer Pumps for donating, cutting, and welding the steel tube frame.
Emerson Hardwood for donating flooring.