Abstract:
The present invention relates to a pressure vessel in the form of a container having an enlarged mouth with an externally threaded outer periphery. A cover member having a depending internally threaded wall portion is adapted to be screwed onto the threaded mouth of the container, the cover member and the container having ports leading thereinto. A deformable partition in said container divides the latter into two variable volume chambers in communication respectively with said ports, said deformable partition having a mouth which is secured to a portion of a thin annular supporting member of resilient material, said supporting member having an additional portion extending outwardly from said first portion and two concentric annular zones of retention are provided for said additional portion of said annular supporting member, the innermost annular zone providing a resilient seal and the outermost annular zone providing rigid retention of the outer periphery of said annular supporting member.
Abstract:
This invention relates to the art of servo systems to effect precise control of a hydraulic actuator, and comprises a distributor valve and a control actuator valve therefor, the distributor valve being conformed to pressurize the hydraulic actuator at all times and having a valve member balanced by capillary passageways to prevent sticking, the control actuator having an associated control system to restrain rapid movement of the hydraulic actuator.