Single Point Release for Dual Buckle Restraint System, Phase II

ARCCA Inc., challenged the members of Single Point Technologies to improve the original design of Five Point Industries and devise a single point release for dual buckle safety restraint for the existing CCOPS seat.

Objectives:      Utilize a hydraulic system      Design a fail-safe mode      Create a means of maintainability      Implement onto existing CCOPS seat Previous Design Problems:      Hydraulic lock due to unequal cylinder volumes      No means of maintainability      Loss of pivot on buckle stalk      Unusable hydraulic fluid

Team members:      Samuel Bressler      Joel DeNardis      Thomas Drill      Jacob Finkel      Samantha Iivari      Michael Youhouse Advisor:      Gary Neal

The design is primarily based on last year's concept, but includes several improvements. Cylinders with equal volumes in each chamber were used to prevent hydraulic lock. A fluid reservoir was added as a means of maintainability, not only for filling the system but for pressurizing the system as well. A check valve was added to ensure that backflow would not hinder normal operating conditions. Pressure relief valves were added for the fail safe mode that in the event that the lines become crimped the system would revert back to a dual button release. With the addition of the pressure relief valves, flexible tubing could be used which aids in the implementation of the system. Flexible tubing also allowed for a larger inner diameter of the tubing. A more structurally stable buckle mount decreased the force losses due to applied torques, which requires less force to depress the safety restraint buckle release. This mount was also attached directly to the button to allow pivot of the buckle stalk. The working fluid in the system was changed from water to a water/antifreeze mix to prevent failure under harsh conditions.

Picture of Prototype	Hydraulic Schematic of Design

Computer Aided Design of Mounting Device