Reagent-catalyst driven single use hydraulic drive and single use large volume injector

A single use hydraulic drive device comprising:

• a housing configured to hold a first chemical material and a moveable barrier;
• an insertion structure configured for moveable placement into the housing, the insertion structure including a section coated with a second chemical material;
• and
• an activation mechanism configured to hold the section coated with a second chemical material outside the housing,
• wherein a self-regulating pressure in the housing enables a controlled rate of hydraulic displacement of the moveable barrier by:
• release of the section coated with a second chemical material into the housing by activation of the activation mechanism;
• pressure generation in the housing due to gas creation and thermal expansion from chemical reactions between the first chemical material and the second chemical material;
• hydraulic displacement of the moveable barrier in the housing at the controlled rate;
• and
• retraction of the section coated with a second chemical material from the chamber when the pressure overcomes the holding mechanism to enable the holding mechanism to hold the section coated with a second chemical material outside of the chamber.

A method for single use hydraulic drive, the method comprising:

• releasing a holding device to move a catalyst coated portion of a rod into a reagent filled chamber;
• generating pressure in the chamber due to at least one of gas creation and thermal expansion from a chemical reaction between the catalyst coated portion and the reagent;
• hydraulically displacing a moveable object in hydraulic communication with the chamber;
• and
• stopping further chemical reaction when the pressure exceeds a holding device force threshold to enable the holding device to re-hold a retracted catalyst coated portion of the rod outside of the chamber,
• wherein self-regulating pressure in the chamber enables a controlled rate of hydraulic displacement of the moveable object.