Pumps – Combined
Reexamination Certificate
1999-06-15
2001-04-24
Freay, Charles G. (Department: 3746)
Pumps
Combined
C417S363000, C418S097000, C418S100000
Reexamination Certificate
active
06220825
ABSTRACT:
FIELD OF INVENTION
This invention is directed to a rotary-screw air-compressor and more particularly to a rotary-screw air-compressor having an air end, a separator, and a mounting apparatus for the separator and air end.
BACKGROUND
Rotary-screw air-compressors are used to drive air-powered machines and tools. Rotary-screw air-compressors are known for their reliability, durability and ease of maintenance. The reliability, durability and ease of maintenance in large part come from the simplicity of the air end. The air end is the portion of the compressor which compresses the air, and generally utilizes a less complex assemblage of parts than reciprocating compressors.
U.S. Pat. No. 5,199,858, Tsuboi, improves upon an oil-injected rotary-screw air-compressor by providing an oil tank having an L-shaped vertical section and a base portion. The L-shaped vertical section contains an oil separating element. A compressor body is mounted on the base portion of the oil tank. An air reservoir tank is formed unitarily with and below the oil tank.
The present invention seeks to improve upon previous rotary-screw air-compressors. The present invention seeks to reduce the floor space taken up by a rotary-screw air-compressor. The invention reduces floor space use by vertically stacking parts of the rotary-screw air-compressor.
The invention further desires to reduce the noise level and improve durability over previous rotary-screw air-compressors. The invention reduces noise level and improves durability by reducing the vibrational impact and the load the motor and air end have on various components of the compressor such as the separator.
The invention further reduces noise level by providing a cooler fan assembly which creates less operating noise than previous cooler fan assemblies.
The invention further desires to reduce the overall number of parts utilized in the rotary-screw air-compressor. The invention reduces the overall number of parts by providing a separator which eliminates the need for previously used moisture separating units.
The invention further improves the efficiency of the cooler fan assembly.
SUMMARY
Accordingly, in one embodiment of the invention, a water-injected rotary-screw air-compressor is provided with a first platform. A separator having a separator body is connected to the first platform. A second platform has a second platform support. The support is disposed vertically above the separator. An air end and a means to power said air end are disposed over the second platform support and connected to the second platform support. A means prevents the second platform support from producing a load on the separator body. The second platform is connected to the first platform.
In another embodiment of my water-injected rotary-screw air compressor, the first platform includes a first elevated surface and a second elevated surface. A chasm separates the first and second elevated surfaces. A portion of the separator body is disposed in the chasm. The separator body remains free of contact with the first platform.
In still a further embodiment of my invention, a water-injected rotary-screw air-compressor separator is provided with a separator body. An internal surface of the separator body defines a hollow. A partition divides the hollow into a first and a second chamber. A first baffle is disposed in the first chamber and a second baffle is disposed in the second chamber. A discharge inlet opens into the first chamber. The discharge inlet permits an amount of compressed air and an amount of coolant discharged from an air end to enter into the first chamber. A coolant outlet opens out of the first chamber. The coolant outlet permits the coolant to exit the first chamber. A compressed air outlet opens out of the first chamber. The compressed air outlet permits compressed air to leave the first chamber.
A compressed air inlet opens into the second chamber. The compressed air inlet permits compressed air from the first chamber to enter the second chamber. A compressed air discharge outlet opens out of the second chamber. A moisture outlet opens out of the second chamber.
In still another embodiment of my invention, a water-injected rotary-screw air-compressor cooler fan assembly is provided with a shroud. The shroud has a first end and an opposite second end. The shroud defines an air passage. The air passage has a constriction. A coolant cooling heat exchanger is connected to the shroud. A compressed air cooling heat exchanger (aftercooler) is connected to the shroud. The coolant cooling heat exchanger and aftercooler are opposite each other. A pair of cooler fans are disposed completely within the shroud and between the aftercooler and coolant cooling heat exchanger.
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Baniak,Compressors-II; Lubrication, vol: 59, Apr.-Jun. 1973; pp. 21, 28, 30; Copy in 418-97.
Myers Wayne K.
Poole David C.
Conte Robert F. I.
Freay Charles G.
Gardner Denver, Inc.
Lee Mann Smith McWilliams Sweeney & Ohlson
Solak Timothy P.
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