Apparatus that mixes non-homogenous fluid. A threaded shaft within a housing circulates fluid within a container to effect mixing. In one embodiment, when placed in a container of fluid, the housing the fluid is recirculated through opposing ends of the housing. In an embodiment of a related method for mixing, a pump housing containing a screw journaled for rotation receives fluid within a container and conveys the fluid therethrough to circulate a fluid portion in the container along an exterior surface of the housing for mixing with another fluid portion to improve fluid homogeneity. After mixing, the portion of the fluid which first circulates through the housing may recirculate through the housing with said another portion of the fluid. The fluid may be continuously mixed and recirculated through the housing.

The object of this invention is to create the elements necessary to supply lifting energy in flowlines or recipients containing motionless fluids. The invention provides a motive force through hollow shafts or hollow stators inside a streamlined housing having a rotor comprised of two concentric and coplanar arrays of external and internal blades working together as pump and turbine on the same plane. To operate, the artifact requires a source of fluid supply acting as motive fluid to boost a static or relative slow-motion fluid. The motive fluid travels from an internal hollow shaft toward an external hollow shaft, or from a scroll case throughout hollow stators to an internal array of blades to induce movement on the rotor. The present invention is designed to be used in different locations for different applications in different positions, to support the transportation of fluids. It operates with any fluid supply such as gas or liquid or a mix of both. The artifact does not require direct sources of electrical power.

The object of this invention is to create the elements necessary to supply lifting energy in flowlines or recipients containing motionless fluids. The invention provides a motive force through hollow shafts or hollow stators inside a streamlined housing having a rotor comprised of two concentric and coplanar arrays of external and internal blades working together as pump and turbine on the same plane. To operate, the artifact requires a source of fluid supply acting as motive fluid to boost a static or relative slow-motion fluid. The motive fluid travels from an internal hollow shaft toward an external hollow shaft, or from a scroll case throughout hollow stators to an internal array of blades to induce movement on the rotor. The present invention is designed to be used in different locations for different applications in different positions, to support the transportation of fluids. It operates with any fluid supply such as gas or liquid or a mix of both. The artifact does not require direct sources of electrical power.

A fluid-driven linear motor comprises a cylinder (5), a piston (4) and a piston rod (3) connected to the piston (4), wherein the two sides of the piston (4) in the cylinder (5) are alternatively supplied with fluid from a slide valve arrangement, the slide valve arrangement including a slide (9) accommodated in a chamber and which is shifted between its end positions controlled by a pilot rod (22) coaxially mounted in a through bore (12) in the slide (9). The pilot rod (22) is adapted to alternately set the through bore (12) in fluid connection with the ends of the slide (9) when the piston (4) is located in its end positions. The pilot rod (22.) is provided with an extension rod (204) adapted to slide inside a bore (203) inside said piston (5) and said piston rod (3), so that the stroke length of the linear motor can be extended. Moreover, a pressure chamber (209) is provided at the distal end of the pilot rod (22), said pressure chamber (209) being adapted to hold on the pilot rod (22) with a holding force when in its end positions until mechanical forces from the piston overcome said holding force.

A fire fighting vehicle includes a chassis, a front axle, a rear axle, an engine, a battery system, an electromagnetic device, an accessory drive, and a controller. The accessory drive is positioned to receive a mechanical input from the engine and the electromagnetic device. The controller is configured to selectively engage a plurality of operational modes including a standby mode and a hybrid mode. According to the standby mode, the controller is configured to operate the electromagnetic device using stored energy stored in the battery system to drive the accessory drive with the engine off. According to the hybrid mode, the controller is configured to operate both the engine and the electromagnetic device.

Systems and methods for reducing the pressure of a first pressurized fluid, thereby reducing the temperature of the pressurized fluid, and utilization of the reduced-pressure and temperature fluid to cool a second fluid. Such an approach can enable a reduction in the size and weight of a hydraulic system, utilize waste energy in a system, and/or minimize electrical power requirements of a system, among other benefits.

A rocket engine propulsion system having improved engine performance is described herein. The rocket engine propulsion system includes multiple axial counterbalances to reduce or eliminate axial thrust exerted on components of a turbopump. The axial counterbalances can allow for a larger range of axial thrust forces while coupling this ability to a rotational speed (e.g., rotations per minute, or RPM) of a shaft. The axial counterbalances include protrusions that extend circumferentially around a shaft that mate with protrusions on swing arms. The swing arms are rotatably attached to a bracket which is constrained by a static support.

A rocket engine propulsion system having improved engine performance is described herein. The rocket engine propulsion system includes multiple axial counterbalances to reduce or eliminate axial thrust exerted on components of a turbopump. The axial counterbalances can allow for a larger range of axial thrust forces while coupling this ability to a rotational speed (e.g., rotations per minute, or RPM) of a shaft. The axial counterbalances include protrusions that extend circumferentially around a shaft that mate with protrusions on swing arms. The swing arms are rotatably attached to a bracket which is constrained by a static support.

A fire fighting vehicle includes a chassis, tractive elements coupled to the chassis, a pump coupled to the chassis, a discharge fluidly coupled to the pump, an accessory module coupled to the chassis, and an electric motor coupled to the chassis, the pump, and the accessory module. The accessory module is configured to receive mechanical energy and provide at least one of electrical energy or fluid energy. The electric motor is configured to drive (a) the pump to provide fluid to the discharge such that the fluid is expelled from the discharge and (b) the accessory module to provide the at least one of electrical energy or fluid energy.

Apparatus that mixes non-homogenous fluid. A threaded shaft within a housing circulates fluid within a container to effect mixing. In one embodiment, when placed in a container of fluid, the housing the fluid is recirculated through opposing ends of the housing. In an embodiment of a related method for mixing, a pump housing containing a screw journaled for rotation receives fluid within a container and conveys the fluid therethrough to circulate a fluid portion in the container along an exterior surface of the housing for mixing with another fluid portion to improve fluid homogeneity. After mixing, the portion of the fluid which first circulates through the housing may recirculate through the housing with said another portion of the fluid. The fluid may be continuously mixed and recirculated through the housing.