Abstract: A pumping system comprises an internal combustion engine, a generator, a pumping unit and a heat recovery system. The generator is driven by the internal combustion engine. The pumping unit is powered by the generator. The heat recovery system thermally couples the internal combustion engine with the pumping unit.

Abstract: The helix heated hoses 10 and 12 use two features to increase the flexibility. The first feature is a braided-copper heating element 14, which has increased flexibility over the prior art solid copper heating element. The element is spiral wound around the hose and held in place with a moisture barrier 16. The second feature is the helix twist 18 located just before the point where the hoses 10 and 12 attach to the manifold 20. The helix feature is created with the helix support 22, which initiates the twist around 24 inches back from the point of termination. The helix feature works to reduce the moment of inertia about the neutral axis 26 of the two supply hoses 10 and 12.

Abstract: A solvent piston 22 shuttles between first and second positions. In the first position, high pressure air applied to the rear 22a of the solvent piston 22 closes a solvent bore 24 around the solvent piston 22 and prevents passage of solvent into the mix chamber 26. In the second position, high pressure air is applied to the front 22b of the solvent piston 22 causing it to retract slightly thereby uncovering the solvent bore 24, closing off the solvent inlet 28 and allowing a slug of solvent to mix with the purge air 32 and pass from the solvent outlet 30 into the mix chamber 26. The solvent is either self contained in the applicator or plumbed eternally to the gun.

Abstract: A two-piece collar (10) is rigidly clamped onto the hydraulic driver shaft (12) via two shoulder bolts (14). The collar halves (16) engage a tightly toleranced groove feature (18) on the spool (20) that is assembled onto the linear sensor shaft (22). The spool (20) houses a magnet (24) that sends a position signal to the sensor (26). As the hydraulic driver shaft (12) reciprocates during operation, the spool (20) moves along with it sending the position signal to the sensor (26) that tells the driver (28) to change direction. The hydraulic driver and chemical pump shafts (12) can slowly rotate over time, which is preferred for increased chemical pump/hydraulic driver seal life.

Abstract: A method of cleaning and flushing a fast-set material spray gun 10 is disclosed which uses, in the preferred embodiment, a mixture of approximately 62.5% DMSO, 32.5% DBE and 5% water. This mixture 12 is non-toxic when atomized and lowers the freezing point of the liquid to below 10° F. Because the solvent is mixed with the purge air and expelled from the gun in atomized form, it is important that a non-toxic solvent be utilized and also important that the freezing point of the mixture be low enough to allow use in colder climates without freezing.

Abstract: A solvent piston 22 shuttles between first and second positions. In the first position, high pressure air applied to the rear 22a of the solvent piston 22 closes a solvent bore 24 around the solvent piston 22 and prevents passage of solvent into the mix chamber 26. In the second position, high pressure air is applied to the front 22b of the solvent piston 22 causing it to retract slightly thereby uncovering the solvent bore 24, closing off the solvent inlet 28 and allowing a slug of solvent to mix with the purge air 32 and pass from the solvent outlet 30 into the mix chamber 26. The solvent is either self contained in the applicator or plumbed eternally to the gun.

Abstract: The fluid section or head (10) for a plural component applicator can be easily assembled or removed from the air section (12) by turning the fluid head ? of a turn. The fluid head (10) has four tabs (14) that protrude and engage with four undercut features (16) within the handle (12). Tabs (14) are inserted through corresponding openings (16) in the front (12a) of air section (12) and rotated such that tabs (14) are retained behind lips (18). A locking tab feature (20) in the hose manifold (24) mates to a recess feature (22) in the handle (12) to prevent the fluid section (10) from rotating.

Abstract: The advantage of this construction is that the time between manual cleanings of the frontal area of the gun can be lengthened or eliminated. The spray gun utilizes high pressure air forced through thin openings and that surround the spray tip, to eliminate the eddies in the air flow around the frontal area of the spray gun. One concentric thin opening surrounds the spray tip and is directed parallel to the direction of spray. With a second concentric thin opening, the air is directed at an angle of about 55 degrees relative to the axis or direction of spray.

Abstract: The side seal assembly consists of three main components: a hardened and precision ground side seal 12, a spring 14 and a housing 16 in which the side seal 12 and spring 14 are assembled. The side seal contains two tabs 22 that fit through a slot feature 24 in the housing. The tabs 22 on the side seal 12 slide through the housing slot 24 into a relief area 26 that allows the side seal 12 to turn 90 degrees and fall into a shallow pocket 28 that keeps the side seal 12 retained.

Abstract: The hose manifold integrates fluid filtration using cylindrical mesh screens and incorporates a check valve backup fluid shut-off system into the hose manifold. Two threaded check valve assemblies (one assembly on the iso side, one on the resin side) with slip on cylindrical filter screens are assembled into the hose manifold to filter the iso and resin fluids. When the hose manifold is assembled to the main fluid section of the foam applicator, pin features within the main fluid section open the spring loaded check balls in the hose manifold to allow for full fluid flow to the main fluid section.

Abstract: The cartridge 10 provides an inexpensive, effective, clean, reliable means of supplying pressurized cleaning fluid for two component applicators 14. The low friction piston 18 design reduces drag and provides consistent cleaning fluid 12 pressure.

Abstract: A two component spray gun with low/high flow rates allows the operator to spray in confined areas at lower flow without having to change the mix module. The lower flow reduces undesirable “spray back” and will also help reduce material waste. Pneumatic piston 12 travel, which determines on/off fluid flow, can be selected on the fly to either close the fluid ports 14 which stops fluid flow, partially open the fluid ports 14 which limits fluid flow, or to fully open the fluid ports 14 to allow for maximum flow. Pneumatic piston 12 travel can be limited by means of a simple multi-position mechanical stop plunger 16.

Abstract: A method of cleaning and flushing a fast-set material spray gun 10 is disclosed which uses, in the preferred embodiment, a mixture of approximately 62.5% DMSO, 32.5% DBE and 5% water. This mixture 12 is non-toxic when atomized and lowers the freezing point of the liquid to below 10° F. Because the solvent is mixed with the purge air and expelled from the gun in atomized form, it is important that a non-toxic solvent be utilized and also important that the freezing point of the mixture be low enough to allow use in colder climates without freezing.

Abstract: The helix heated hoses 10 and 12 use two features to increase the flexibility. The first feature is a braided-copper heating element 14, which has increased flexibility over the prior art solid copper heating element. The element is spiral wound around the hose and held in place with a moisture barrier 16. The second feature is the helix twist 18 located just before the point where the hoses 10 and 12 attach to the manifold 20. The helix feature is created with the helix support 22, which initiates the twist around 24 inches back from the point of termination. The helix feature works to reduce the moment of inertia about the neutral axis 26 of the two supply hoses 10 and 12.