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Class 418/98 - Non-working fluid initially directed to shaft bearing


Subclass of Class 418 - Rotary expansible chamber devices
Definition: Apparatus in which the nonworking fluid is initially directed
No. of patents: 75
Last issue date: 07/29/2008


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NumberTitleIssue Date
7404706Scroll fluid machine having oil-supply holes being formed through a reinforcement bearing plate on a rear surface of the orbiting scroll
A scroll fluid machine comprises a fixed scroll, an orbiting scroll and a plurality of self-rotation preventing device for preventing the orbiting scroll from rotating on its own axis. On the rear surface of the orbiting scroll, a reinforcement bearing plate is fixe...
07/29/2008
7314359Vane pump for continuously variable transmission
In a vane pump disposed inside a transmission case of a continuously variable transmission, a pump case (20), a pump drive shaft (8) rotatably supported by a shaft bore (9) of the pump case (20) to rotate a rotor (5), and a drain p...
01/01/2008
7258535Sealing features for a pump and ink jet printer mounting the pump
A pump is provided with a housing, a rotor, and a separating member. The housing is formed by connecting two housing members. A first housing member has a cylindrical wall and a bottom wall, and the other end of the cylindrical wall is open. A second housing member ...
08/21/2007
7255929Use of spray coatings to achieve non-uniform seal clearances in turbomachinery
The invention provides spray coatings to achieve circumferentially non-uniform seal clearances in turbomachines. In steam and gas turbines it is desirable to assemble the machines with elliptical seal clearances to compensate for expected casing distortion, rotordyn...
08/14/2007
7237902Apparatus and method for projection type display
There is provided a projection display device with an angle shifter, in which the picture quality can be improved by reducing a visual pixel gap between an imaging element and a projection lens. The projection display device includes a light source for emitting a li...
07/03/2007
7186099Inclined scroll machine having a special oil sump
A scroll-type compressor is provided in an inclined or inverted position with an oil sump disposed adjacent to a gas inlet of the scroll wraps to allow droplets of oil to be entrained in the gas being compressed so that the oil droplets in the gas can cool the scrol...
03/06/2007
7150610Gas compressor
To reduce an excessively high vane back pressure to an appropriate pressure to thereby relieve operational load, and to improve the vane projectability at the start and during low speed operation to thereby prevent chattering; There are provided back pressure spaces...
12/19/2006
7104772Screw compressor
In a screw compressor for a refrigerator, suction-side rotor shafts of screw rotors are supported rotatably by angular ball bearings for forward thrust load, an annular gap is formed between the angular ball bearings and a suction-side bearing casing, and outermost ...
09/12/2006
7090476Rotary fluid machine
A rotary fluid machine is provided in which a rotating shaft (113) fixed to a rotor (41) is rotatably supported on a fixed shaft (102) fixed to a casing (11), sliding surfaces of the fixed shaft (102) and the rotating shaft (113...
08/15/2006
7052249Air/oil separating tank—thermostatic valve—minimum pressure valve—oil cooling radiator—compressed air cooling radiator group
A group is provided for a compressed air distribution unit of the type including an intake regulator, an oil bath-screw type compressor, an air/oil separating tank, a minimum pressure valve, an air cooling radiator, a pressurized air collection tank, a thermostatic ...
05/30/2006
7044717Lubrication of a hermetic carbon dioxide compressor
A hermetic compressor which uses carbon dioxide as the working fluid. The compressor includes a motor and a compression mechanism operatively coupled by a drive shaft supported by a bearing. The drive shaft includes a radially extending bore in fluid communication w...
05/16/2006
7040882Water-injected screw-type compressor
A water-injected screw-type compressor element including a housing limiting a rotor chamber in which two cooperating rotors are arranged which, by means of axle ends, are beared with both extremities in water-lubricated slide bearings provided in the housing. Bearin...
05/09/2006
7029243Gas compressor having oil separation filter
Disclosed is a gas compressor capable of preventing deformation of a filter used for separating oil contained in a compressed gas. The gas compressor includes a suction port, a suction chamber, a gas compressing portion, a compressed gas releasing portion provided i...
04/18/2006
7021912Scroll fluid machine
A second frame is arranged between a first frame and an orbiting scroll, and a central space and an outer peripheral space are sealed off by a seal portion, which is formed between an end surface of a shaft support of the orbiting scroll and the second frame. Also, ...
04/04/2006
6948915Oil free screw compressor
A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided wi...
09/27/2005
6688868Screw compressor injected with water
The invention concerns an element of a screw compressor injected with water containing two rotors (2-3) in a rotor chamber (4). The water circuit (11) contains a part (10) in which practically prevails the outlet pressure. On the inlet side, the axle jour...
02/10/2004
6520758Screw compressor assembly and method including a rotor having a thrust piston
An air compressor assembly of the rotary screw type. The air compressor assembly comprises a housing having an inlet end and a discharge end. An internal working chamber extends within the housing and terminates in a discharge end face at the discharge en...
02/18/2003
6422844Screw compressor
To prevent a decrease in capacity of a compressor, and to decrease the quantity of oil contained in discharged gas, and to decrease the quantity of oil discharged to an outside of the compressor. In a screw compressor in which a screw rotor is supported b...
07/23/2002
6302667Oil-free screw rotor apparatus
The invention relates to a rotary screw machine that is completely oil-free. Known rotary screw machines with cooling, sealing, lubrication of the screw rotors and oil-lubrication and oil-cooling of the bearings have been replaced with water-lubricated an...
10/16/2001
6258293Refrigeration cycle
A refrigerating apparatus comprising a refrigeration cycle comprising at least a compressor, a condenser, a dryer, an expansion mechanism and an evaporator, a refrigerant composed mainly of a fluorocarbon type refrigerant containing no chlorine and having...
07/10/2001
6190149Vacuum pump oil distribution system with integral oil pump
An oil distribution system for machinery such as a vacuum pump is disclosed. The system features an auxiliary oil pump integrally mounted adjacent to one end of the vacuum pump's drive shaft. The drive shaft drives the oil pump and has a longitudinal pass...
02/20/2001
6149408Coalescing device and method for removing particles from a rotary gas compressor
A compressor system for creating essentially liquid-free fluid flows includes a screw compressor that has an inlet port for receiving a low pressure gas stream, a main lubrication injection port for receiving an injection branch of a filtered lubrication ...
11/21/2000
6079966Compressor housing
A variable capacity, vane-type compressor has a cylinder block with an oval rotor chamber. A plurality of vanes mounted in slots on a rotor rotate inside the rotor chamber on a shaft that is concentric with the minor diameter of the rotor chamber. Valves ...
06/27/2000
6019585Oil-sealed vane-type rotary vacuum pump with oil feed
The invention concerns an oil-sealed vane-type rotary vacuum pump with a suction chamber (8) housing a rotatably mounted rotor (3) which has an anchoring section (21) and a bearing section (23) with a slot (24) in which two vanes (26) are mounted with a s...
02/01/2000
5727936Rotary displacement compressor with liquid circulation system
A rotary displacement compressor having an inlet channel for introducing low pressure gas, an outlet channel through which compressed gas escapes, and at least one rotor mounted in bearings and operating in a working space. The compressor includes a liqui...
03/17/1998
5685702Swash-plate machine
A swash-plate machine includes a hollow-spherical work chamber which is divided by a partition into at least one high-pressure chamber and one low-pressure chamber, into which an operating medium can be carried through a conduit system. The partition exte...
11/11/1997
5685703Hermetically sealed rotary compressor having an oil supply passage to the compression compartment
A hermetically sealed rotary compressor includes a generally cylindrical sealed vessel having an oil reservoir defined therein for accommodating a quantity of lubricating oil, a drive unit within the sealed vessel, and a compressor mechanism within the se...
11/11/1997
5593297Scroll type compressor
In a scroll type compressor, a simple structure provides oil intake assistance to ensure that lubricating oil in an oil space is induced into a spiral groove in correspondence to the rotation rate of a drive shaft. The drive shaft is provided with an incl...
01/14/1997
5569028Scroll compressor having a compressor housing made up of a cup-like front casing and a cap-like rear casing
A scroll compressor includes a compressor housing made up of a cup-like first casing having a suction port defined therein and a cap-like second casing having a discharge port defined therein. The compressor housing accommodates a stationary scroll member...
10/29/1996
5551852Scroll type compressor having a seal bearing unit
A scroll type compressor including a drive shaft which is provided with a spiral groove formed in an external circumferential surface of the drive shaft. The spiral groove communicates diagonally between the oil space and the upper portion of the main bea...
09/03/1996
5536153Non-contact vane-type fluid displacement machine with lubricant separator and sump arrangement
A non-contact vane-type fluid-displacement machine includes a stator housing having an annular interior surface defining an interior bore and a rotor supported in an eccentric position in the interior bore of the stator housing relative to the annular int...
07/16/1996
5531578Scroll compressor
A large diameter portion of a rotating shaft is supported by an opening in a front housing via a radial bearing. An outer race of the bearing is in contact with an inner, rear surface of the housing as a shoulder portion of the opening. The inner surface ...
07/02/1996
5462419Pressure biased co-rotational scroll apparatus with enhanced lubrication
A high side co-rotational scroll compressor has lubricant sumps in both the discharge and suction pressure portions of its hermetic shell as well as a pressure biasing arrangement by which the scroll members are urged together in operation to minimize int...
10/31/1995
5449279Pressure biased co-rotational scroll apparatus with enhanced lubrication
A high side co-rotational scroll compressor has lubricant sumps in both the discharge and suction pressure portions of its hermetic shell as well as a pressure biasing arrangement by which the scroll members are urged together in operation to minimize int...
09/12/1995
5411385Rotary compressor having oil passage to the bearings
Two oil passages are defined in a cylinder unit of a rotary compressor for feeding lubrication oil to front and rear bearings. The bearings bear a shaft of a rotor unit relative to the cylinder unit. At least one of the two oil passages is formed with an ...
05/02/1995
5405253Rotary vane gas compressors
A rotary compressor includes a stator (2) having an inlet (3) and an outlet (4) for gas to be compressed, a rotor (5) within the stator (2) and vanes (7) being present to define cells (C) to transport gas from the inlet (3) to the outlet (4). According to...
04/11/1995
5253988Gear pump
Method and apparatus for on-site cleaning of a gear pump by coupling the gear pump outlet to the gear pump inlet and to the inlet end of the passage and which bypasses the bearing and is preferably controlled by a valve element which can block off the byp...
10/19/1993
5252048Fluid compressor having improved Oldham mechanism
A fluid compressor includes a cylinder, a rotating member eccentrically arranged in the cylinder, the rotating member having a spiral groove formed in an outer surface thereof at a gradually decreasing pitch, a spiral blade having a suction-side end porti...
10/12/1993
5249931Axial flow fluid compressor with oldram coupling
A compressor includes a cylinder, and a rotating body located in the cylinder. A spiral groove is formed on the outer periphery of the rotating body. A spiral blade is fitted in the groove and divides the space between the inner periphery of the cylinder ...
10/05/1993
5222885Horizontal rotary compressor oiling system
A compressor oiling system for a horizontal rotary compressor including a pressure plate defining a motor chamber and compressor unit chamber within the compressor each having an oil sump. An opening in the pressure plate allows oil pressurized by dischar...
06/29/1993
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