A method for manufacturing a vehicle pressure accumulator, in which a thermoplastic parison is used to form an enclosure around a chamber by applying at least one portion, at least partially molten, of the parison onto at least one portion of the chamber, to attach the parison to the chamber.

A device for fluid power recuperation includes at least one hydropneumatic accumulator having a shell. The shell contains a fluid port communicating with a fluid reservoir of the accumulator that is separated from a gas reservoir of the accumulator by a movable separator. The gas reservoir of the accumulator communicates via a gas port with at least one gas receiver containing a regenerating heat exchanger made in the form of a metal porous structure. The aggregate area of the heat exchange surfaces of the regenerating heat exchanger over the aggregate internal receiver volume exceeds 2000 cm.sup.2/liter, preferably exceeds 10000 cm.sup.2/liter.

The present invention provides a Type 3 pressure vessel comprising a polar boss that is attached to a metallic liner and provides reinforced static strength, fatigue strength, endurance, chemical resistance and/or corrosion resistance of the liner orifice or neck region. In particular, the material of the polar boss has higher static strength, fatigue strength, endurance, chemical resistance and/or corrosion resistance relative to that of the liner material.

A pressure accumulator includes an accumulator housing (2) in which a movable separating element (30) fluid-tightly separates a gas chamber (16) filled with a working gas from a fluid chamber (28). A monitoring device (50, 54) supplies an optical signal in the event of a malfunction affecting the sealing effect of the separating element (30).

Disclosed is a control system for a pulsation dampener device. The system comprises a fluid reservoir, a pipeline assembly extending between the reservoir and the bladder of the pulsation dampener device, and a bladder sensor for gauging the fluid pressure within the bladder. The system is configured such that, when the pulsation dampener device is not operative and when the pressure of the fluid within the bladder is above or below a predetermined preoperative bladder threshold, the excess or deficient equivalent volume of fluid respectively is transferred from the bladder to the reservoir or from the reservoir to the bladder respectively. Further, when the pulsation dampener device is operative and when at least one pressure reading of the fluid within the bladder is above or below a predetermined operative bladder threshold, the excess or deficient equivalent volume of fluid respectively is transferred from the bladder to the reservoir or from the reservoir to the bladder respectively.

The present invention is a new and improved bladder for use with a piston accumulator apparatus, system and method of using same that provides a dispersion tube in the bladder to allow fluid to be communicated under a vacuum from the bladder to the accumulator seawater chamber and back again.

A bladder and attachment member assembly for use with a container comprises an elastomeric gas-filled bladder comprising a valve stem. A first attachment member is disposed over the valve stem within the container with the bladder. A second attachment member is disposed over the valve stem and over the first attachment member. The second attachment member is outside of the container interposed between the valve stem and a container opening. Rotational movement of the valve stem is fixed relative to one or both of the first and second attachment members. In an example, the valve stem comprises one or more surface features that register with one or more surface features of the first and/or second attachment member to thereby fix relative valve stem rotational movement. In an example, the valve stem surface feature is a flat surface that registers with a flat surface of the second attachment member inside diameter.

Embodiments of an intermediate hydraulic system and method of use are disclosed, the system for receiving hydraulic fluid from at least one hydraulic power source and transmitting the hydraulic fluid to at least one hydraulic implement. The system may comprise at least one selector valve, at least one accumulator, and at least one valve controller, each in fluid communication one with the other and operative to receive and transmit hydraulic fluid therebetween, and at least one processor for automatically controlling hydraulic fluid flow and pressures through the system in real time.