David S Innes

Title: David S Innes: Innovator in Hydraulic Valve Technology

Introduction

David S Innes is a notable inventor based in Inverurie, GB. He has made significant contributions to the field of hydraulic valve technology, holding two patents that showcase his innovative approach to engineering solutions.

Latest Patents

One of his latest patents is for hydraulic valves with integral seals. This invention comprises a plurality of ports that communicate with a passageway, along with a valve member that is movable within the passageway to control communication between the ports. The valve member features a lateral shear seal that is integral with it and engages the passageway. In one position, the valve member isolates a first port from a second port, while in another position, it allows communication between the two ports through a passage within the valve member. The design includes first and second portions of different effective cross-section areas, with integral sealing members that create a radial seal between the valve member and the passageway. A supply port provides pressure to the outside of the valve member, producing a force that moves the valve member towards a closed position.

Another significant patent by Innes is for an electrically operated hydraulic valve. This invention includes a valve assembly that provides a common valve passageway, an inlet port, an outlet port, and a return port connected to the passageway. The axially movable valve device allows fluid flow between the outlet port and the return port in one position, while in another position, it enables flow between the inlet port and the outlet port. A spring provides a restoring force to return the valve device to its first position. The electrically operated actuator, which comprises a permanent magnet and a cooperating electrical coil, is designed to operate with an electrical supply that provides a unidirectional current pulse to the coil.

Career Highlights

David S Innes is currently employed at Aker Subsea Inc., where he continues to develop innovative hydraulic solutions. His work has significantly impacted the efficiency and functionality of hydraulic systems.

Collaborations

Innes has collaborated with notable colleagues, including Matthew H Tibbitts and Andrew D Gledhill, contributing to advancements in hydraulic technology.

Conclusion

David S Innes is a distinguished inventor whose work in hydraulic valve technology has led to innovative solutions that enhance system performance. His patents reflect a deep understanding of engineering principles and a commitment to advancing the field.