MID-TERM PRESENTATION June 21, 2000

Contents Week 1: Team Selection Week 2: Project Bids/Selection Week 3: Problem Statement, Design Partition Week 4: Conceptual Designs Week 5: Selection Analysis, Patent Search

Project Bids/Selection Examples: Sweep Chalkboard/Whiteboard Eraser Car Body Rotisserie Bearing Ratchet Automatic Bartender (Computerized) Abdominal Machine (Improvement) Multiple Egg Cracker and Separator GPS Stinger Locator

Problem Statement In current ratchet design, there is a lack of necessary space to pivot the handle far enough to lock the ratchet into place. Objective: Design, develop and construct a continuous bearing ratchet. Solution: Use of a drawn cup roller clutch to allow the transmission of torque in one direction and free overrun in the opposite direction.

Design Partition Five functional elements: Ratchet Head Socket Mount Continuous Ratchet Element Handle Reversible Mechanism

Conceptual Designs Examples: (1) Geared Figure 8 Wrench (2) Hinged Roller Ratchet (3) Fine Tooth Clench Wrench (4) Bearing Telescoping Wrench (5) Fine Tooth Crank Wrench

Geared Figure 8 Wrench

Hinged Roller Ratchet

Fine Tooth Clench Wrench

Bearing Telescoping Wrench

Fine Tooth Crank Wrench

Selection Analysis First Level Evaluation Matrix Second Level Evaluation Matrix The Chosen Design

First Level Evaluation Matrix

Second Level Evaluation Matrix

Roller Bearing Ratchet End-Handle Mid-Handle Hinge Points Head Shaft Retaining Ring Position for Bearing

Patent Product Search 1 Dual Bearing Fishing Rod 2 Locking Rotatable Head Wrench 3 Open Head Adjustable Wrench 4 Offset Head Ratchet 5 Multipurpose Socket Ratchet Wrench

Patent Evaluation 1 Dual Bearing Fishing Reel – Allows reversability – Uses bearing design

Patent Evaluation 2 Locking Rotatable Head Wrench – Allows different positions for head – Uses locking mechanism in head – Allows use in tight places

Patent Evaluation 3 Open Head Adjustable Wrench – Allows use in tight spaces – Allows high torque to be applied

Patent Evaluation 4 Offset Head Ratchet – Similar to a hinged design – Allows use in awkward areas

Patent Evaluation 5 Multipurpose Socket Ratchet Wrench – Allows repositioning of handle – Useable in tight spaces

Conclusions CHOSEN DESIGN REASONS FOR CHOSEN DESIGN DESIGN MODEL (Rapid Prototype)

Next Week Post Mid-Term Review Layout Drawings