Patent US5653585A successfully refreshed from Google Patents.
US5653585A
Expired / Lapsed
US
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Apparatus and methods for cooling and sealing rotary helical screw compressors
Assignee: Individual
•
Filing: 1994-10-17
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Granted: 1997-08-05
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Expires: 2014-10-17
Abstract
Abstract In a compression system which incorporates a rotary helical screw compressor, and for any type of gas or refrigerant, the working liquid oil is atomized through nozzles suspended in, and parallel to, the suction gas flow, or alternatively the nozzles are mounted on the suction piping. In either case, the aim is to create positively a homogeneous mixture of oil droplets to maximize the effectiveness of the working liquid oil in improving the isothermal and volumetric efficiencies. The oil stream to be atomized may first be degassed at compressor discharge pressure by heating within a pressure vessel and recovering the energy added by using the outgoing oil stream to heat the incoming oil stream. The stripped gas is typically returned to the compressor discharge flow. In the preferred case, the compressor rotors both contain a hollow cavity through which working liquid oil is injected into channels along the edges of the rotors, thereby forming a continuous and positive seal between the rotor edges and the compressor casing. In the alternative method, working liquid oil is injected either in the same direction as the rotor rotation or counter to rotor rotation through channels in the compressor casing which are tangential to the rotor edges and parallel to the rotor centerlines or alternatively the channel paths coincide with the helical path of the rotor edges.
Inventors
- 👤 Anthony N. Fresco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:24
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/02; F04C29/026; F04C18/00; F04C18/08; F04C18/12; F04C18/14; F04C18/16; F04C29/0007; F25; F25B; F25B1/00; F25B1/04; F25B1/047
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
195 words
An improved gas or vapor or refrigerant working fluid compression system including a helical screw compressor of the type comprising: a) a compressor casing said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber there between, said rotors having tips, said tips and said casing defining a clearance space there between; c) a low pressure suction port and a high pressure discharge port within said compressor opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; wherein the improvement comprises: said compressor casing having a channel communicating said nonworking liquid to said clearance space between said casing and any of said tips of said rotors, said channel directing said nonworking liquid in a direction essentially tangential to said tips of said rotors.
Claim 2
Dependent Claim
195 words
An improved gas or vapor or refrigerant working fluid compression system including a helical screw compressor of the type comprising: a) a compressor casing said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber there between, said rotors having tips, said tips and said casing defining a clearance space there between; c) a low pressure suction port and a high pressure discharge port within said compressor opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; wherein the improvement comprises: said compressor casing having a channel communicating said nonworking liquid to said clearance space between said casing and any of said tips of said rotors, said channel directing said nonworking liquid in a direction essentially tangential to said tips of said rotors.
Claim 3
Independent Claim
296 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of said rotors, and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is suspended within said low pressure suction port.
Claim 4
Independent Claim
296 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of said rotors, and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is suspended within said low pressure suction port.
Claim 5
Dependent Claim
176 words
The method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, as claimed in claim 2, wherein any of said rotors of said compressor further contains an internal passage, said internal passage communicating with said means for supplying a nonworking liquid at a pressure higher than compression suction pressure, any of said tips of said rotors further contains a channel in said helical path of said tip of said rotor, said channel opening to said clearance space, said internal passage communicating with said channel, wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said part of said nonworking liquid in bulk form through said internal passage to said channel in said helical path at any of said tips of any of said rotors.
Claim 6
Dependent Claim
130 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 2, wherein said compressor casing further has a channel, said channel opening to any of said bores of said casing, said channel communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said part of said nonworking liquid in bulk form through said channel in said casing.
Claim 7
Dependent Claim
194 words
The method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, as claimed in claim 2, wherein said casing of said helical screw compressor further has a valve, said valve providing a means for returning any part of said gas or vapor or refrigerant working fluid from said compression chamber to said low pressure suction port, said valve having a longitudinal axis parallel to said longitudinal axis central to said bores, said valve containing an internal passage, said internal passage communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, said internal passage opening to any of said bores of said casing, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said nonworking liquid in bulk form through said internal passage in said valve opening to any of said bores of said casing.
Claim 8
Dependent Claim
132 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 2, wherein said casing of said compressor further contains a hole, said hole opening to any of said bores of said casing, said hole in said casing communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said nonworking liquid in bulk form through said hole in said casing.
Claim 9
Independent Claim
311 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is suspended within said means for feeding a gas or vapor or refrigerant working fluid to said low pressure suction port.
Claim 10
Independent Claim
311 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is suspended within said means for feeding a gas or vapor or refrigerant working fluid to said low pressure suction port.
Claim 11
Dependent Claim
176 words
The method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, as claimed in claim 7, wherein any of said rotors of said compressor further contains an internal passage, said internal passage communicating with said means for supplying a nonworking liquid at a pressure higher than compression suction pressure, any of said tips of said rotors further contains a channel in said helical path of said tip of said rotor, said channel opening to said clearance space, said internal passage communicating with said channel, wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said part of said nonworking liquid in bulk form through said internal passage to said channel in said helical path at any of said tips of any of said rotors.
Claim 12
Dependent Claim
130 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 7, wherein said compressor casing further has a channel, said channel opening to any of said bores of said casing, said channel communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said part of said nonworking liquid in bulk form through said channel in said casing.
Claim 13
Dependent Claim
194 words
The method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, as claimed in claim 7, wherein said casing of said helical screw compressor further has a valve, said valve providing a means for returning any part of said gas or vapor or refrigerant working fluid from said compression chamber to said low pressure suction port, said valve having a longitudinal axis parallel to said longitudinal axis central to said bores, said valve containing an internal passage, said internal passage communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, said internal passage opening to any of said bores of said casing, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said nonworking liquid in bulk form through said internal passage in said valve opening to any of said bores of said casing.
Claim 14
Dependent Claim
132 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 7, wherein said casing of said compressor further contains a hole, said hole opening to any of said bores of said casing, said hole in said casing communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said nonworking liquid in bulk form through said hole in said casing.
Claim 15
Independent Claim
311 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors, and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is carried by said means for feeding a gas or vapor or refrigerant working fluid to said low pressure suction port.
Claim 16
Independent Claim
311 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors, and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is carried by said means for feeding a gas or vapor or refrigerant working fluid to said low pressure suction port.
Claim 17
Dependent Claim
176 words
The method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, as claimed in claim 12, wherein any of said rotors of said compressor further contains an internal passage, said internal passage communicating with said means for supplying a nonworking liquid at a pressure higher than compression suction pressure, any of said tips of said rotors further contains a channel in said helical path of said tip of said rotor, said channel opening to said clearance space, said internal passage communicating with said channel, wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said part of said nonworking liquid in bulk form through said internal passage to said channel in said helical path at any of said tips of any of said rotors.
Claim 18
Dependent Claim
130 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 12, wherein said compressor casing further has a channel, said channel opening to any of said bores of said casing, said channel communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said part of said nonworking liquid in bulk form through said channel in said casing.
Claim 19
Dependent Claim
194 words
The method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, as claimed in claim 12, wherein said casing of said helical screw compressor further has a valve, said valve providing a means for returning any part of said gas or vapor or refrigerant working fluid from said compression chamber to said low pressure suction port, said valve having a longitudinal axis parallel to said longitudinal axis central to said bores, said valve containing an internal passage, said internal passage communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, said internal passage opening to any of said bores of said casing, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said nonworking liquid in bulk form through said internal passage in said valve opening to any of said bores of said casing.
Claim 20
Dependent Claim
132 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 12, wherein said casing of said compressor further contains a hole, said hole opening to any of said bores of said casing, said hole in said casing communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, and wherein the step of injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors is achieved by injecting said nonworking liquid in bulk form through said hole in said casing.
Claim 21
Independent Claim
470 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system including a helical screw compressor of the type comprising: a) a compressor casing said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid communicating with said high pressure discharge port of said compressor, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid having a means for discharging said gas or vapor or refrigerant working fluid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid having a means for discharging said nonworking liquid, said method comprising the steps of: directing a part of said nonworking liquid to a pressure vessel, said part of said nonworking liquid originating from said means for discharging said nonworking liquid from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and raising the temperature of said part of said nonworking liquid within said pressure vessel, and liberating any portion of gas or vapor or refrigerant working fluid dissolved in said part of nonworking liquid within said pressure vessel, and discharging the now degassed part of said nonworking liquid from said pressure vessel, and cooling said degassed part of said nonworking liquid to a temperature below that of said nonworking liquid within said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and atomizing said degassed part of said nonworking liquid, and directing said degassed part of said nonworking liquid now in atomized form to said low pressure suction port, and discharging said liberated gas or vapor or refrigerant working fluid from said pressure vessel, and directing said liberated gas or vapor or refrigerant working fluid to said means for discharging said gas or vapor or refrigerant working fluid from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 22
Independent Claim
470 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system including a helical screw compressor of the type comprising: a) a compressor casing said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid communicating with said high pressure discharge port of said compressor, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid having a means for discharging said gas or vapor or refrigerant working fluid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid having a means for discharging said nonworking liquid, said method comprising the steps of: directing a part of said nonworking liquid to a pressure vessel, said part of said nonworking liquid originating from said means for discharging said nonworking liquid from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and raising the temperature of said part of said nonworking liquid within said pressure vessel, and liberating any portion of gas or vapor or refrigerant working fluid dissolved in said part of nonworking liquid within said pressure vessel, and discharging the now degassed part of said nonworking liquid from said pressure vessel, and cooling said degassed part of said nonworking liquid to a temperature below that of said nonworking liquid within said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and atomizing said degassed part of said nonworking liquid, and directing said degassed part of said nonworking liquid now in atomized form to said low pressure suction port, and discharging said liberated gas or vapor or refrigerant working fluid from said pressure vessel, and directing said liberated gas or vapor or refrigerant working fluid to said means for discharging said gas or vapor or refrigerant working fluid from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 23
Dependent Claim
78 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 17, wherein said method further comprises the step of: increasing the pressure of said degassed part of said nonworking liquid discharged from said pressure vessel to a level above that of said nonworking liquid within said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 24
Dependent Claim
75 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 17, wherein said method further comprises the step of: compressing said liberated gas or vapor or refrigerant working fluid directed to said means for discharging said gas or vapor or refrigerant from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 25
Dependent Claim
66 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 17, wherein said method further comprises the step of: heating said part of said nonworking liquid directed to said pressure vessel by heat exchange with said liberated gas or vapor or refrigerant working fluid discharged from said pressure vessel.
Claim 26
Dependent Claim
64 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 17, wherein said method further comprises the step of: heating said part of said nonworking liquid directed to said pressure vessel by heat exchange with said degassed part of said nonworking fluid discharged from said pressure vessel.
Claim 27
Independent Claim
510 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system including a helical screw compressor of the type comprising: a) a compressor casing said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting said nonworking liquid into said compression chamber and to said clearance space between said casing and any tip of any of said rotors; g) means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid operatively connected to said high pressure discharge port of said compressor, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid comprising a means for discharging said gas or vapor or refrigerant working fluid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid comprising a means for discharging said nonworking liquid, said method comprising the steps of: directing a part of said nonworking liquid to a pressure vessel, said nonworking liquid originating from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and raising the temperature of said part of said nonworking liquid within said pressure vessel, and liberating any portion of gas or vapor or refrigerant working fluid dissolved in said part of nonworking liquid, and discharging the now degassed part of said nonworking liquid from said pressure vessel, and cooling said degassed part of said nonworking liquid to a temperature below that of said nonworking liquid within said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and injecting said degassed part of said nonworking liquid into said compression chamber and to said clearance space between said casing and any tip of any of said rotors through said means for injecting said nonworking liquid into said compression chamber and to said clearance space between said casing and any tip of any of said rotors, and discharging said liberated gas or vapor or refrigerant working fluid from said pressure vessel, and directing said liberated gas or vapor or refrigerant working fluid to said means for discharging said gas or vapor or refrigerant from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 28
Independent Claim
510 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system including a helical screw compressor of the type comprising: a) a compressor casing said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting said nonworking liquid into said compression chamber and to said clearance space between said casing and any tip of any of said rotors; g) means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid operatively connected to said high pressure discharge port of said compressor, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid comprising a means for discharging said gas or vapor or refrigerant working fluid, said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid comprising a means for discharging said nonworking liquid, said method comprising the steps of: directing a part of said nonworking liquid to a pressure vessel, said nonworking liquid originating from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and raising the temperature of said part of said nonworking liquid within said pressure vessel, and liberating any portion of gas or vapor or refrigerant working fluid dissolved in said part of nonworking liquid, and discharging the now degassed part of said nonworking liquid from said pressure vessel, and cooling said degassed part of said nonworking liquid to a temperature below that of said nonworking liquid within said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid, and injecting said degassed part of said nonworking liquid into said compression chamber and to said clearance space between said casing and any tip of any of said rotors through said means for injecting said nonworking liquid into said compression chamber and to said clearance space between said casing and any tip of any of said rotors, and discharging said liberated gas or vapor or refrigerant working fluid from said pressure vessel, and directing said liberated gas or vapor or refrigerant working fluid to said means for discharging said gas or vapor or refrigerant from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 29
Dependent Claim
78 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 22, wherein said method further comprises the step of: increasing the pressure of said degassed part of said nonworking liquid discharged from said pressure vessel to a level above that of said nonworking liquid within said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 30
Dependent Claim
75 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 22, wherein said method further comprises the step of: compressing said liberated gas or vapor or refrigerant working fluid directed to said means for discharging said gas or vapor or refrigerant from said means for separating said gas or vapor or refrigerant working fluid and said nonworking liquid.
Claim 31
Dependent Claim
66 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 22, wherein said method further comprises the steps of: heating said part of said nonworking liquid directed to said pressure vessel by heat exchange with said liberated gas or vapor or refrigerant working fluid discharged from said pressure vessel.
Claim 32
Dependent Claim
64 words
The method for improving the isothermal or volumetric efficiency of the gas or vapor or refrigerant compression system, including a helical screw compressor, as claimed in claim 22, wherein said method further comprises the steps of: heating said part of said nonworking liquid directed to said pressure vessel by heat exchange with said degassed part of said nonworking fluid discharged from said pressure vessel.
Claim 33
Independent Claim
412 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; g) said casing of said helical screw compressor having a valve, said valve providing a means for returning any part of said gas or vapor or refrigerant working fluid from said compression chamber to said low pressure suction port, said valve having a longitudinal axis parallel to said longitudinal axis central to said bores, said valve containing an internal passage, said internal passage communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, said internal passage opening to any of said bores of said casing, said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of said rotors, by injecting said nonworking liquid in bulk form through said internal passage in said valve opening to any of said bores of said casing, and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is carried by said low pressure suction port.
Claim 34
Independent Claim
412 words
A method for improving the isothermal or volumetric efficiency of a gas or vapor or refrigerant working fluid compression system, including a helical screw compressor, said compressor of the type comprising: a) a compressor casing, said casing having parallel intersecting bores, each of said bores having a longitudinal axis central to said bore; b) intermeshing helical screw rotors, each of said rotors rotatably mounted within said bores for rotation about said axes and defining within said casing a compression chamber therebetween, said rotors having tips, said tips and said casing defining a clearance space therebetween, said tips extending in a helical path along said rotors; c) a low pressure suction port and a high pressure discharge port, said ports opening to said intermeshing helical screw rotors at opposite ends thereof; d) means for feeding a gas or vapor or refrigerant working fluid to said suction port for compression within said compression chamber; e) means for supplying a nonworking liquid at a pressure higher than compression suction pressure; f) means for injecting part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of any of said rotors; g) said casing of said helical screw compressor having a valve, said valve providing a means for returning any part of said gas or vapor or refrigerant working fluid from said compression chamber to said low pressure suction port, said valve having a longitudinal axis parallel to said longitudinal axis central to said bores, said valve containing an internal passage, said internal passage communicating with said means for supplying said nonworking liquid at a pressure higher than compression suction pressure, said internal passage opening to any of said bores of said casing, said method comprising the steps of: injecting in bulk form said part of said nonworking liquid at a pressure higher than compression suction pressure into said compression chamber and to said clearance space between said casing and any of said tips of said rotors, by injecting said nonworking liquid in bulk form through said internal passage in said valve opening to any of said bores of said casing, and atomizing through a nozzle another part of said nonworking liquid at a pressure higher than compression suction pressure, said nozzle directing said atomized nonworking liquid into said gas or vapor or refrigerant working fluid, wherein said nozzle is carried by said low pressure suction port.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |