Cellula Robotics Ltd.

The ROV Drill is a subsea drilling system designed to take geological core samples of the ocean floor to a depth of 130 feet in water depths of up to 8,000 feet.

  • Directed the design of a complex hydraulic cartridge valve manifold incorporating 5 proportional and 4 directional control valves to control flow and pressure to the drill pipe drive motor.
  • Due to the high flow rate (110 GPM) the manifold weighs in excess of 200 pounds. The proportional valves are some of the largest available, but the resulting manifold is half the weight and a fraction of the size of a comparable one for sub-plate mounted valves.


U.S. NAVY RESCUE SUBMERSIBLE (Pressurized Rescue Module)
OceanWorks International Corporation

The Pressurized Rescue Module is a state-of-the-art submarine rescue system for evacuating the crew from a disabled military submarine. Total project value: $100 million.

  • Lead designer for fluid and gas systems, supervising other designers and engineers
  • Main point of contact for all systems involving pumps, valves and piping, including high pressure air and oxygen, dewatering, hydraulic, jettison and emergency breathing systems
  • Designed low profile hull shut off valves for 2-inch dewatering pipes
  • Designed modifications to dewatering pumps to adapt them for subsea use
  • Created and supervised test programs for various systems

Kongsberg Mesotech Ltd.

These sonars get attached to the opening of the trawl net, and assist in finding fish and maintaining ground clearance to avoid damage to the seafloor. The sonar unit contains a precision mechanical pan-and-tilt mechanism and sensitive electronics, but is subject to extremely rough handling when hauled onboard along with tons of fishing tackle.

  • Designed the Sound Dome Mechanics and Protective Packaging
  • Sonar is able to withstand a vertical drop of 1.5 metres onto a steel deck, twice that of the competitors product

Submar Systems Inc.

This valve senses water level to proportionately control air flow into the ballast tank of a two man wet sub in order to maintain a constant water level in the soft ballast tank regardless of changing sea pressure.

  • Solved problem of dangerous uncontrolled ascent or descent
  • Designed, built and tested the valve
  • Extremely sensitive yet handles 200 SCFM air flow rate
  • Compact, simple and cost effective

Hyco Submersibles Ltd.

The Gemini is an acrylic-hulled (transparent) tourist submersible for eight passengers, with an operating depth of 2800 ft. seawater (designed but not built).

Supervised design of:

  • Special ballast system control and instrumentation to accommodate for large change in displacement of acrylic sub due to sea pressure changing with depth
  • Life support systems
  • Underwater electrical cables
  • Special hatch seal for fast tourist entry and exit
  • Solved problem of contraction of a plastic hull under pressure by having it mounted on slides while still being held to the frame structure (backbone) of the sub

ISE Research Ltd.

Dolphins are diesel-powered remote controlled semi-submersible vehicles that operate at snorkeling depth. They were developed for the Canadian Hydrographic Service and the United States Navy. The hatches for accessing engine and electronic compartments are saddle-shaped and present a unique challenge for watertight sealing.

  • Designed a sealing system that retains a pressure tight seal to more than 200 ft of seawater despite difficult-to-seal configuration
  • Designed a fastening system that permits fast access for servicing the diesel engine. Hatch fasteners have built in hinges so hatch can be opened from either side of the vehicle.

ISE Research Ltd.

Pressure-activated drop weight ensures that sub will not be lost in the event of a control failure. Designed, assembled and tested a mechanism that releases a thousand pound drop weight from the keel of the sub.

  • Operated by sea pressure and set to release at a preset water depth
  • Simple and very reliable

ISE Research Ltd.

The SDL is a five person (pilot, co-pilot, diving attendant and two divers) diver lockout submersible, formerly belonging to the Canadian Navy.

  • Designed new gas panels for diver lockout chamber and life support systems
  • Installed stainless steel plumbing on panels and inside submersible
  • Trained submersible pilots and maintainers how to operate the gas, ballast and hydraulic systems

Copyright 2007-2012 H. DASKEN Mechanical and Technical Innovations. All rights reserved.
Photo credits: US Navy Pressurized Rescue Module System - courtesy of OceanWorks International Corporation; other photos by Hugh Dasken.