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8161800 |
Methods and systems for valve leak simulation
A method for simulating a compressor valve leak is described. The method includes inducing a flow of gas past a compressor valve that is coupled to a bypass block, wherein the bypass block defines...
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7866964 |
Sensor for hermetic machine
A hermetic scroll compressor includes a hermetic shell through which the pressure within the shell is monitored. In one embodiment, a housing is resistance welded into an aperture extending through...
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7845920 |
Oil pump
An oil pump in which pulsation vibration due to the dynamic pressure on the discharge port side can be attenuated. In an oil pump for transporting fluid from a suction port to a discharge port by...
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7704061 |
Oil pump
An oil pump includes pump chambers each having a volume varied by engine drive and for pressurizing oil inhaled through an inlet port and discharge it through an outlet port, and a branch passage...
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7674099 |
Compressor with oil bypass
An oil lubricated compressor which includes a bypass oil line connecting respective oil paths upstream and downstream of the motor. The bypass oil path permits oil to be detoured around the motor...
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7654804 |
Fluid displacement apparatus having pressure sensing device
A fluid displacement apparatus includes a housing for receiving a refrigerant, a driving shaft rotatably received in the housing, a magnetic clutch attached to the driving shaft for rotation...
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7547203 |
Screw compressor
In order to improve a screw compressor for compressing refrigerant in a refrigerant circuit, comprising a compressor housing, in which a screw rotor receiving means and an inlet channel as well as...
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7326917 |
Wear monitor for turbo-machine
A wear determination device for determining vibration in a turbine engine component to reduce wear in a turbine engine. The wear determination device may be capable of measuring vibrations in a...
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7322806 |
Scroll compressor with externally installed thermostat
A thermostat for sensing an unduly high temperature in a sealed compressor, which is a scroll compressor in the disclosed embodiment, extends through the housing of the sealed compressor into the...
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7281912 |
Compressor having a safety device being built in at least one of the screw plugs of the oil-separator
A compressor is provided with an oil separator for separating part of the lubricating oil contained in the compressed refrigerant, path arrangement for connecting a separation chamber of the...
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7232295 |
Tempering method for a screw-type vacuum pump
A screw-type vacuum pump (1) is tempered such that characteristics of the pump are not substantially altered when the pump is subjected to thermal stress. In order to achieve said aim, cooling is...
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7216526 |
Method and apparatus for measuring vane wear in a sliding vane rotary pump
The amount of wear on the vanes of a sliding vane rotary pump is determined by inserting a wear inspection dip stick into a wear inspection port providing in a housing of the sliding vane rotary...
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7083393 |
Combination sight glass, strainer and orifice
A sight glass block for inspecting oil flow through a scavenge line for an oil separation system in a compressor comprises a combination of a sight glass for inspecting the oil flow, a strainer for...
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6957952 |
Fiber optic system for detecting pump cycles
A fiber optic system for detecting a stroke of a pump, the fiber optic system including a first fiber optic line configured for directing light onto a portion of the pump that moves during the...
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6913451 |
Vacuum pump with fail-safe vanes
A vacuum vane pump for generating a vacuum condition for aircraft instruments includes a rotor having a peripheral surface eccentrically mounted in a housing having a confrontingly opposed inner...
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6877966 |
Apparatus for indicating remaining life expectancy of a rotary sliding vane pump
The present invention is directed to an apparatus for determining vane wear in rotary sliding vane pumps that operate using slideable vanes, while the pump is in operation. The invention includes a...
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6769886 |
Rotary vane pump with vane wear access port and method
A rotary vane pump, including a housing within which is rotatably mounted a rotor having a plurality of slots therein with a vane positioned for sliding movement within each of the slots. An access...
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6752604 |
Automatic wear indicator for sliding vane vacuum and gas pressure pumps
Tracer material, encapsulated within a cavity of the vanes of a sliding vane pump, which is released into the discharge conduit when the vanes reach their predetermined wear limit, acting as a wear...
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6695593 |
Fiber optics systems for high purity pump diagnostics
A pump for ultra-pure fluids comprises a flexible diaphragm separating a fluid chamber from an air chamber. The diaphragm creates an airtight seal between the fluid chamber and the air chamber. Any...
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6657217 |
Probe for sensing movement in a compressor system
A probe is used to detect axial movement of a rotating part such as a shaft. The probe includes a probe tube portion that protrudes into an annular groove on the rotating part. When the rotating...
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6565337 |
Method and apparatus for inspecting vanes in a rotary pump
The present invention is directed to an apparatus and method for determining vane wear in rotary vane pumps that operate using slideable vanes. A view port is formed in an end of the pump housing....
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6402486 |
Free-diaphragm pump
A pump for ultra-pure fluids comprises a flexible diaphragm separating a fluid chamber from an air chamber. The diaphragm creates an airtight seal between the fluid chamber and the air chamber when...
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6375434 |
Pump/meter combination
An integrated pump and meter having a spindle axially extending in the direction of the flow of fluid for pumping and metering the flow of fluid. A volume of fluid pumped is calculated as a...
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6371742 |
Cooling device
The invention concerns a cooling device wherein the chamber (2) represents cooling channels arranged in the thickness of the pump cylinder walls. The steam flux (7) generated by the heat to be...
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6358027 |
Adjustable fit progressive cavity pump/motor apparatus and method
The present invention provides an adjustable rotor and/or stator, so that the interference fit and/or clearance can be adjusted. The rotor and/or stator are tapered to provide a difference in fit...
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6315535 |
Screw vacuum pump having valve controlled cooling chambers
A discharge side housing 3 has a third cooling water chamber 19 communicating with a first cooling water chamber 7 of a main housing 1 through a cooling water passage 26. The third cooling water...
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6244844 |
Fluid displacement apparatus with improved helical rotor structure
A fluid displacement apparatus includes a housing defining a chamber therein having a first port and a second port. First and second helical rotors with opposing pitches are meshed within the...
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6213740 |
Flexible impeller pump having a transparent safety cover
A flexible impeller pump having a transparent safety cover. The pump includes a flexible impeller and a housing having a pump and cover. The pump end cover comprises a transparent safety cover...
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6168385 |
Rotary device with means for monitoring and adjusting the clearance between the rotors
A rotary device (11) has a first rotor (12) rotatable about a first axis and having at its periphery a recess (14). A second rotor (13) is counter-rotatable to said first rotor (12) about a second...
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5879138 |
Two-stage rotary vane vacuum pump
The invention pertains to a rotary vane vacuum pump (1) with a high vacuum stage (9, 22), with a fore-vacuum stage (8, 21), with a substantially cylindrical rotor (3) which has bearing and anchor...
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5879146 |
Stepped wear indicator for a radial compressor
The invention includes a wear indicator for a radially extensible vane compressor. The indicator is an elongate member having two longitudinal sections with a step inbetween. The step catches on a...
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5800140 |
Compact scroll fluid device
A compact scroll fluid device includes a pair of wrap support elements with one of the wrap support elements having an inner axial surface formed with an involute spiral recess and the other of the...
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5791884 |
Scroll compressor with sealed terminal
A scroll compressor has a stationary scroll and a swivel scroll engaged with each other in a hermetic housing. A sealed terminal is provided to send signals outside of the housing from a sensor...
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5727933 |
Pump and flow sensor combination
A pump for use in additive systems such as foam chemical additive systems for fire fighting water, the pump including impeller elements and flow meter elements in a common casing. The pump casing...
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5704767 |
Integral pump and flow meter device
A pump housing is provided with a conduit extending through the housing between a pump inlet and pump outlet. A pump device is disposed within the housing and in communication with the conduit to...
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5601414 |
Interstage liquid/gas phase detector
A positive displacement rotary axial screw pump which comprises a series of sealed closures formed by meshing of the rotors for building the internal pressure gradient of the pump from the pump...
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5511952 |
Refrigerant displacement apparatus with an improved thermal sensing device
A scroll type fluid displacement apparatus includes a housing in which interfitting fixed and orbiting scrolls are disposed. The outer surface of the end plate of the fixed scroll and the inner...
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5449276 |
Two stage vacuum pump having different diameter interengaging rotors
A fluid rotating apparatus includes a plurality of rotors accommodated in a housing, at least one of the rotors having its outer diameter different from that of the other of the rotors. Bearings...
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5433590 |
Cooling device for the lubrication circuit of a compressor
In a cooling device for a rotary piston compressor, in particular a screw-type compressor, which is part of a refrigerant circuit together with a condenser and an evaporator, coolant of the...
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5421708 |
Oil separation and bearing lubrication in a high side co-rotating scroll compressor
A high side co-rotating refrigerant scroll compressor includes a motor disposed vertically above its compression mechanism. The discharge of gas from the compression mechanism is through the drive...
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5411387 |
Rotary displacement compressor having adjustable internal volume ratio and a method for regulating the internal volume ratio
A rotary displacement compressor has an adjustable regulator (22) which determines the internal volume ratio of the compressor. The regulator (22) is adjusted in response to the sound level of a...
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5395220 |
Speed detector of scroll-type fluid machine
A speed detector of a scroll-type fluid machine in which a fixed scroll and an orbiting scroll, each of which includes a spiral wrap disposed on the inner surface of an end plate thereof, are...
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5322428 |
Gear transfer pump with lubrication and sealing of the driveshaft and idler pin
An improved rotary, gear within a gear transfer pump, including a pump housing having a circular pumping chamber communicating with a first port and a second port. An externally driven rotor is in...
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5257921 |
Electronic slide valve position indicator
A closed stainless steel tube is used to provide pressure and media isolation between the core and coils of a sensor in the form of a variable core transformer. The core is connected to and moved...
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5028220 |
Cooling and lubrication system for a vacuum pump
A fluid management system for a rotary screw vacuum pump is provided in which lubricating fluid is transmitted to the vacuum pump from an oil supply reservoir while a coolant fluid is circulated to...
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4983106 |
Rotary screw machine with multiple chambers in casing for lubrication-coding fluid
The machine comprises first and second screw rotors (1, 2) supported by bearings (47) in a stator casing (3) which is provided with a suction inlet and a delivery outlet, the first rotor is driven...
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4767292 |
Electrical commutation apparatus
A fluid motor having a gerotor gear set includes a first member having internal teeth and a second member having external teeth. The second member is rotatably and orbitally mounted within the...
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4737087 |
Drive shaft seal for gear pump and method
A seal for the drive shaft of a gear pump for polymeric materials dissolved in a fluid solvent is disclosed, and which is adapted to prevent the polymeric material from leaking and hardening on the...
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4735559 |
Scroll-type vacuum pump with oil seal between suction and discharge chambers
An upper housing for rotatably supporting a driving scroll in a sealing container is provided with an annular chamber to be maintained at the atmospheric pressure. The annular chamber is...
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4697998 |
Hydraulic motor having integral flow control capability
A closed-loop motor speed control system is disclosed including a gerotor motor (11) having a gerotor gear set (51) operable to transmit rotational torque output by means of a main drive shaft (83)...
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