Abstract: A pressure vessel for containing materials under elevated pressures includes a metal liner and an adhesive layer, applied to the outer surface of the metal liner, where the adhesive layer is treated with a vacuum bag in order to secure the adhesive to the outer surface of the liner. An overwrap layer is applied on top of the adhesive on the outer surface of the metal finer, where the overwrap layer is formed by winding a filamentary material around the liner, such that the filamentary material adheres to the adhesive forming an overwrap layer on the outer surface of the metal liner, forming the pressure vessel.

Abstract: A pressure vessel for containing materials under elevated pressures includes a metal liner and an adhesive layer, applied to the outer surface of the metal liner, where the adhesive layer is treated with a vacuum bag in order to secure the adhesive to the outer surface of the liner. An overwrap layer is applied on top of the adhesive on the outer surface of the metal liner, where the overwrap layer is formed by winding a filamentary material around the liner, such that the filamentary material adheres to the adhesive forming an overwrap layer on the outer surface of the metal liner, forming the pressure vessel.

Abstract: A pressure vessel includes a main portion bounding an internal chamber for accommodating a pressurized fluid medium, and a hollow stem portion projecting from the main portion and bounding a passage communicating with the internal chamber. The vessel walls are formed by an inner liner that extends into the stem portion, and a fiber reinforced outer jacket overwrapping a main portion of the liner to confer structural strength to the main portion of the vessel. A fitting axially adjoins the stem portion and is secured thereto by a strengthening body that is situated externally of and engages the stem portion of the liner and an axial portion of the fitting, and the strengthening body being anchored to the outer jacket. The axial portion of the fitting has an external projection or ring that is firmly engaged by the strengthening body to prevent at least axial movement of the fitting relative to the stem portion of the liner.

Abstract: A fluid storage and expulsion system having a rigid tank, the tank having two propellant chambers and two independently operable piston assemblies slidable in their propellant chambers for expelling propellant. In a first embodiment, a coaxial fluid storage expulsion system having inner and outer pistons is provided. Accordingly, the inner piston is provided which is slidable in an inner annular space for expelling fluid therein through a second opening. As well, an outer piston is provided which is slidable in an outer annular space for expelling a second fluid through a first opening. In a further embodiment, the pistons and tanks are positioned in series. As such, the rigid tank is provided with forward and aft propellant chambers as well as forward and aft piston assemblies. A piston guide, which extends the length of the rigid tank is positioned concentrically within the tank.

Abstract: A grinding pump for pumping liquid containing solid and semi-solid matter having an improved efficiency and which requires a lower operating rpm while exhibiting an increased flow rate. The pump includes: a housing having a chamber; a shaft rotatably disposed within the housing, a comminutor on the shaft within the housing and having a helical blade, and an impeller having a vane; and a shredding liner secured to the housing structure in the chamber, so as to cooperate with the comminutor and impeller vane in shredding and pulverizing the matter.

Abstract: An improved diaphragm-type fluid storage amd expulsion system includes a rigid elongated guide member secured to the polar region of an expulsion diaphragm and journalled for axially sliding movement through a sleeve located in the corresponding polar region of a tank. The guide member provides support for the diaphragm protecting it from lateral forces.

Abstract: A fluid storage-expulsion system composed of a tank having two poles and being shaped by one or more surfaces of revolution, the tank having a diametral plane and being substantially symmetrical thereabout, a fluid inlet-outlet on one side of the diametral plane, a pressurant inlet on the other side of the diametral plane and a reversible expulsion metallic diaphragm having a pole adjacent the pressurant inlet and conforming substantially to the interior shape of the tank on one side of the diametral plane, the tank being under tension and the diaphragm being under compression, whereby to prevent the diaphragm from uncontrolled buckling and to cause the diaphragm to reverse in an orderly fashion by flexural yielding upon actuation thereof by the pressurant introduced through the pressurant inlet. A method for producing such storage and expulsion system is also disclosed.