1. SAFE JACK Concept Designs Update and Patent Search

2. Last Week Deliverables Conceptual Designs with PM Evaluation –Plus and minus evaluation needed improvement. –Some drawings needed to be redrawn.

3. This weeks deliverables Improved Concept Design with PM evaluation Patent/Product search relating to Safe Jack concept

4. Improved Concept Designs Narrowed designs down to seven. Added a PM evaluation. Added a new concept design.

5. Hydraulic Stop + Compact, installs underneath jack. + Forces are in one direction, linear. -Larger forces due to mechanical advantage of location. -Small number of lock points.

6. Locking Arm with Track + Easy modification to jack assembly. + Good amount of stop points. - Release mechanism would require large range of motion.

7. Gear Latch System + Compact design. + Easy design for release mechanism. + Could gear it to reduce forces. - Large point forces on gear teeth.

8. Finger Latch System + Compact design. + Easy modification to jack assembly. - Could cause large bending moment on support arm. - Disengaging all fingers at once would be difficult.

9. The Replacement + Good range of lockability. + Easy release. - Requires modification to major support structure. - Large force/moment on arm.

10. Catch and Release + Good range of lockability. + Can adapt to changing heights. - Large range of motion required for release mechanism.

11. Jack Stand Jack + Good range of lockability. + Force will always be in one direction. + Can adapt to changing heights. - Complex release mechanism. - External attachment. - Pin connections need to be substantial.

12. Related Patents/Products Ratcheting Mechanical Jack Piston Block Jack Lift Block Jack Lift Block 2 with pin Jack 4-Post Lift Lock Hydraulic Scissor Lift Two-Part Jack

13. Ratcheting Mechanical Jack US Pat No. 6,929,248 J. B. Matney and B. A. Matney Mechanical jack comprised of a ratcheting gear track connected to a frame Ratchet is disengaged by twisting the handle

14. Piston Block Patent: 3759488 Lukas Spring loaded block is pushed in between piston head and hydraulic cylinder to prevent premature lowering of jack.

15. Lift Block (1) Patent: 5221073 Shockley User inserts metal bar into jack frame once vehicle has been lifted to prevent premature lower of jack.

16. Lift Block (2) Patent: 5984270 Hussaini et al. Sliding box that rests between support bar and main lifting body is pinned in place by user once jack is lifted.

17. 4-Post Lift Lock Patent: 6382358 Kritzer Spring loaded mechanism to automatically lock a 4 post lift into position.

18. Hydraulic Scissor Lift Patent: 6182796 Perlstein et al. Hydraulic lift designed to lift vehicle on flat surfaces. Intention to replace hydraulics with telescoping arms to provide vehicle support in case of jack failure.

19. Two-Part Jack US Pat No. 5,183,235 Inventor: Arzouman et al.

20. Two-part jack system consisting of a mechanical jack stand with a ratchet mechanism and a ratchet release. Power unit raises and lowers jack. Control mechanism locks power unit in an aligned position relative to jack stand.

22. Next Weeks Deliverables Determine and Evaluate Design Criteria. Use pairwise technique to weight design criteria. Rank and score concept designs according to how well they fit the design criteria. (Make sure to have well designed scoring scale). Present ranks and scores in normalized fashion. Interpret and discuss results.