Abstract: A system for dispensing fluid may include a first fluid circuit and second fluid circuit. The first fluid circuit may include a first reservoir configured to contain a supply of first fluid for being dispensed and a first variable volume chamber in flow communication with the first fluid circuit. The second fluid circuit may be configured to provide pressure for dispensing the first fluid. The second fluid circuit may include a second reservoir, a pump, fluid passages configured to provide fluid flow within the second fluid circuit, and a second variable volume chamber in flow communication with the second fluid circuit. The second fluid circuit may be a closed-loop circuit, and the first variable volume chamber and the second variable volume chamber are associated with one another, such that flow of fluid in the second circuit controls dispensing and temperature of the first fluid in the first fluid circuit.

Abstract: A system for supplying at least two fluids in proportioned quantities may include a first and second intake passages configured to be in flow communication with sources of first and second fluids, respectively. The system may include a fluid transfer device in flow communication with the first intake passage and the second intake passage, and a pump in flow communication with the first intake passage. Operation of the pump is configured to supply a quantity of the first fluid to a first chamber of the fluid transfer device such that a quantity of the second fluid is expelled from a second chamber of the fluid transfer device. When operation of the pump is ceased, a quantity of the second fluid enters the second chamber and a quantity of the first fluid is expelled from the first chamber.

Abstract: A system for dispensing fluid may include a first fluid circuit and second fluid circuit. The first fluid circuit may include a first reservoir configured to contain a supply of first fluid for being dispensed and a first variable volume chamber in flow communication with the first fluid circuit. The second fluid circuit may be configured to provide pressure for dispensing the first fluid. The second fluid circuit may include a second reservoir, a pump, fluid passages configured to provide fluid flow within the second fluid circuit, and a second variable volume chamber in flow communication with the second fluid circuit. The second fluid circuit may be a closed-loop circuit, and the first variable volume chamber and the second variable volume chamber are associated with one another, such that flow of fluid in the second circuit controls dispensing and temperature of the first fluid in the first fluid circuit.

Abstract: A system for supplying at least two fluids in proportioned quantities may include a first and second intake passages configured to be in flow communication with sources of first and second fluids, respectively. The system may include a fluid transfer device in flow communication with the first intake passage and the second intake passage, and a pump in flow communication with the first intake passage. Operation of the pump is configured to supply a quantity of the first fluid to a first chamber of the fluid transfer device such that a quantity of the second fluid is expelled from a second chamber of the fluid transfer device. When operation of the pump is ceased, a quantity of the second fluid enters the second chamber and a quantity of the first fluid is expelled from the first chamber.

Abstract: A rotary vane pump includes a cartridge with a sleeve enclosing a set of rotary vanes on a shaft and end members supporting the shaft. A low pressure inlet to the vanes is formed in one side of each end member and a high pressure outlet from the vanes is formed in the other side of each end member. A pair deformable strips are affixed in grooves in the exterior surface of the cartridge which extend in an axial direction at positions that separate the low pressure inlet side from the high pressure outlet side. The cartridge is inserted into a housing having a fluid inlet port and a fluid outlet port to establish a first path between the fluid inlet port of the housing and the low pressure inlet of the cartridge and a second path between the high pressure outlet of the cartridge and the fluid outlet port of the housing. The deformable strips align the end members and the sleeve.

Abstract: A ventilated work chamber, e.g., a paint booth, large enough to allow a worker to move about inside is improved by confining the zone (or path) of the fresh ventilating air to just a portion of the cross section of the chamber, and providing means for shifting the location of the ventilating air zone from one place to another in the chamber, as the worker changes his location.

Abstract: A rotary sweep arm for a self-cleaning filter apparatus in which the nozzle of the sweep arm is provided with a plurality of radially spaced vanes adjustable for equalizing the vacuum along the radial extent of the sweep arm.